[PATCH 00/45] Lustre cleanups

[PATCH 00/45] Lustre cleanups

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Majority of this patch is Lustre code style cleanups.
NULL comparison style is adjusted for the whole lustre tree
(but not lnet not to interfere with James patches in flight).

Some server-only code was removed in the process.

lustre/libcfs in addition was processed to remove as many checkpatch
warnings as was possible. Assuming this is the end result we
want I will process the rest of the Lustre tree in the similar way next.

Remaining warnings from checkpatch are either due to bugs/problems
in checkpatch (reported) or otherwise do not make sense.
Amongst these are the long printed strings - I know we could do an
exception for that, but this is pending renaming some of our debug
printing primitives, so I guess they just stay as is.

Please consider.

Here's the full list of remaining warnings in
drivers/staging/lustre/lustre/libcfs for those curious:

WARNING: line over 80 characters
#456: FILE: drivers/staging/lustre/lustre/libcfs/debug.c:427:
+			CWARN("You are trying to use a numerical value for the mask - this will be deprecated in a future release.\n");

ERROR: that open brace { should be on the previous line
#2102: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1362:
+cfs_hash_for_each_enter(struct cfs_hash *hs)
+{

ERROR: that open brace { should be on the previous line
#2129: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1389:
+cfs_hash_for_each_exit(struct cfs_hash *hs)
+{

ERROR: that open brace { should be on the previous line
#2160: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1420:
+cfs_hash_for_each_tight(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			void *data, int remove_safe)
+{

ERROR: that open brace { should be on the previous line
#2254: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1514:
+cfs_hash_for_each_safe(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+		       void *data)
+{

ERROR: that open brace { should be on the previous line
#2304: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1564:
+cfs_hash_for_each_relax(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			void *data)
+{

ERROR: that open brace { should be on the previous line
#2370: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1630:
+cfs_hash_for_each_nolock(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			 void *data)
+{

ERROR: that open brace { should be on the previous line
#2402: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1662:
+cfs_hash_for_each_empty(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			void *data)
+{

ERROR: that open brace { should be on the previous line
#2459: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1719:
+cfs_hash_for_each_key(struct cfs_hash *hs, const void *key,
+		      cfs_hash_for_each_cb_t func, void *data)
+{

CHECK: spinlock_t definition without comment
#3125: FILE: drivers/staging/lustre/lustre/libcfs/libcfs_lock.c:55:
+	spinlock_t		*lock;

WARNING: line over 80 characters
#4342: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:317:
+			CDEBUG(D_INFO, "Try to unset cpu %d which is not in CPT-table %p\n",

WARNING: line over 80 characters
#4392: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:367:
+		CDEBUG(D_INFO, "No online CPU is found in the CPU mask for CPU partition %d\n",

WARNING: line over 80 characters
#4588: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:563:
+		CERROR("No online CPU found in CPU partition %d, did someone do CPU hotplug on system? You might need to reload Lustre modules to keep system working well.\n",

WARNING: line over 80 characters
#4748: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:723:
+		CWARN("CPU partition number %d is larger than suggested value (%d), your system may have performance issue or run out of memory while under pressure\n",

WARNING: line over 80 characters
#4753: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:728:
+		CERROR("CPU number %d is not multiple of cpu_npartition %d, please try different cpu_npartitions value or set pattern string by cpu_pattern=STRING\n",

WARNING: line over 80 characters
#4803: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:778:
+		CERROR("Expect %d(%d) CPU partitions but got %d(%d), CPU hotplug/unplug while setting?\n",

WARNING: line over 80 characters
#4814: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:789:
+	CERROR("Failed to setup CPU-partition-table with %d CPU-partitions, online HW nodes: %d, HW cpus: %d.\n",

WARNING: char * array declaration might be better as static const
#5734: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:76:
+	char *envp[] = {

WARNING: line over 80 characters
#5748: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:90:
+		CERROR("Error %d invoking LNET debug log upcall %s %s; check /sys/kernel/debug/lnet/debug_log_upcall\n",

WARNING: char * array declaration might be better as static const
#5760: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:102:
+	char *envp[] = {

WARNING: line over 80 characters
#5774: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:116:
+		CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; check /sys/kernel/debug/lnet/upcall\n",

WARNING: memory barrier without comment
#5837: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:179:
+	mb();

CHECK: Alignment should match open parenthesis
#6672: FILE: drivers/staging/lustre/lustre/libcfs/module.c:148:
+					err = libcfs_ioctl_popdata(arg,
+							data, sizeof(*data));

WARNING: line over 80 characters
#7369: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.c:49:
+union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS] __cacheline_aligned;

WARNING: memory barrier without comment
#7839: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.c:519:
+	mb();

CHECK: extern prototypes should be avoided in .h files
#8710: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.h:187:
+extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];

ERROR: Macros with complex values should be enclosed in parentheses
#8712: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.h:189:
+#define cfs_tcd_for_each(tcd, i, j)				       \
+	for (i = 0; cfs_trace_data[i]; i++)				\
+		for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd);	\
+		     j < num_possible_cpus();				 \
+		     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)

CHECK: Concatenated strings should use spaces between elements
#8774: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.h:251:
+		cfs_trace_assertion_failed("ASSERTION("#cond") failed", \

CHECK: Alignment should match open parenthesis
#9075: FILE: drivers/staging/lustre/lustre/libcfs/workitem.c:280:
+		rc = wait_event_interruptible_exclusive(sched->ws_waitq,
+						!cfs_wi_sched_cansleep(sched));


Oleg Drokin (45):
  staging/lustre/ptlrpc: Get rid of /proc references in comments
  staging/lustre/obdclass: Get rid of /proc references in comments.
  staging/lustre/libcfs: Get rid of /proc references in comments
  staging/lustre/llite: Get rid of /proc references in comments
  staging/lustre/lov: Get rid of /proc references in comments
  staging/lustre: Remove unused function oti_init
  staging/lustre: Remove unused osc_on_mdt function
  staging/lustre: Remove server code from client_obd_setup()
  staging/lustre: Remove server code from class_get_type()
  staging/lustre: Remove commented out lock_lock_multi_match
  staging/lustre/osc: Remove commented out osc_page_protected()
  staging/lustre/libcfs: Adjust NULL comparison codestyle
  staging/lustre/lov: Adjust NULL comparison codestyle
  staging/lustre/llite: Adjust NULL comparison codestyle
  staging/lustre/ldlm: Adjust NULL comparison codestyle
  staging/lustre/lmv: Adjust NULL comparison codestyle
  staging/lustre/fid: Adjust NULL comparison codestyle
  staging/lustre/fld: Adjust NULL comparison codestyle
  staging/lustre/lclient: Adjust NULL comparison codestyle
  staging/lustre/include: Adjust NULL comparison codestyle
  staging/lustre/mdc: Adjust NULL comparison codestyle
  staging/lustre/mgc: Adjust NULL comparison codestyle
  staging/lustre/obdclass: Adjust NULL comparison codestyle
  staging/lustre/obdecho: Adjust NULL comparison codestyle
  staging/lustre/osc: Adjust NULL comparison codestyle
  staging/lustre/ptlrpc: Adjust NULL comparison codestyle
  staging/lustre: Remove the "write to FSF to get a copy of GPL" wording
  staging/lustre/libcfs: Cleanup: parenthesis alignment adjustments
  staging/lustre/libcfs: Move EXPORT_SYMBOLs under function/variable
  staging/lustre/libcfs: style change to add missing spaces for
    operations
  staging/lustre/libcfs: reformat cfs_tcd_for_each_type_lock define
  staging/lustre/libcfs: Remove stray spaces after function name
  staging/lustre/libcfs: Shortened too long lines
  staging/lustre/libcfs: Remove unused cfs_tcd_owns_tage() function
  staging/lustre/libcfs: Move private tracefile structs out of header
  staging/lustre/libcfs: Update comments style to match kernel
  staging/lustre/libcfs: Remove useless returns in void functions
  staging/lustre/libcfs: Remove empty lines after/before braces
  staging/lustre: Update cfs_cpu_notify switch statement with a comment
  staging/lustre: Get rid of cfs_trace_buf_type_t typedef
  staging/lustre/libcfs: Get rid of multiple assignments
  staging/lustre: Remove space after cast in cfs_crypto_hash_final()
  staging/lustre/libcfs: Replace use of printk with pr_<level>
  staging/lustre: Convert cfs_trace_daemon_command to use kstrtoul
  staging/lustre: Convert cfs_str2num_check to use kstrtoul

 .../staging/lustre/include/linux/lnet/lnetctl.h    |   4 -
 .../staging/lustre/lnet/klnds/socklnd/socklnd.h    |   4 -
 .../staging/lustre/lnet/klnds/socklnd/socklnd_cb.c |   3 -
 .../lustre/lnet/klnds/socklnd/socklnd_modparams.c  |   3 -
 .../lustre/lnet/klnds/socklnd/socklnd_proto.c      |   3 -
 drivers/staging/lustre/lnet/lnet/router.c          |   4 -
 drivers/staging/lustre/lnet/lnet/router_proc.c     |   4 -
 drivers/staging/lustre/lustre/fid/fid_request.c    |  14 +-
 drivers/staging/lustre/lustre/fid/lproc_fid.c      |  14 +-
 drivers/staging/lustre/lustre/fld/fld_cache.c      |  10 +-
 drivers/staging/lustre/lustre/fld/fld_internal.h   |   2 +-
 drivers/staging/lustre/lustre/fld/fld_request.c    |  32 ++-
 drivers/staging/lustre/lustre/fld/lproc_fld.c      |  11 +-
 drivers/staging/lustre/lustre/include/cl_object.h  |   8 +-
 drivers/staging/lustre/lustre/include/lclient.h    |   4 +-
 drivers/staging/lustre/lustre/include/linux/obd.h  |   6 +-
 .../staging/lustre/lustre/include/lprocfs_status.h |   8 +-
 drivers/staging/lustre/lustre/include/lu_object.h  |   6 +-
 drivers/staging/lustre/lustre/include/lu_ref.h     |   4 -
 .../lustre/lustre/include/lustre/lustre_idl.h      |   6 +-
 drivers/staging/lustre/lustre/include/lustre_cfg.h |   5 +-
 drivers/staging/lustre/lustre/include/lustre_dlm.h |  18 +-
 .../staging/lustre/lustre/include/lustre_export.h  |  11 --
 drivers/staging/lustre/lustre/include/lustre_lib.h |   8 +-
 drivers/staging/lustre/lustre/include/lustre_log.h |  12 +-
 drivers/staging/lustre/lustre/include/lustre_mdc.h |  10 +-
 drivers/staging/lustre/lustre/include/lustre_net.h |  15 +-
 drivers/staging/lustre/lustre/include/obd.h        |  43 +----
 drivers/staging/lustre/lustre/include/obd_class.h  |  49 +++--
 .../staging/lustre/lustre/include/obd_support.h    |   1 -
 drivers/staging/lustre/lustre/lclient/lcommon_cl.c |  32 +--
 drivers/staging/lustre/lustre/ldlm/interval_tree.c |   2 -
 drivers/staging/lustre/lustre/ldlm/ldlm_extent.c   |   9 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_flock.c    |  13 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c      |  60 +-----
 drivers/staging/lustre/lustre/ldlm/ldlm_lock.c     |  65 +++----
 drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c    |  45 +++--
 drivers/staging/lustre/lustre/ldlm/ldlm_pool.c     |  17 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_request.c  |  65 +++----
 drivers/staging/lustre/lustre/ldlm/ldlm_resource.c |  25 ++-
 drivers/staging/lustre/lustre/libcfs/debug.c       |  31 ++-
 drivers/staging/lustre/lustre/libcfs/fail.c        |   3 +-
 drivers/staging/lustre/lustre/libcfs/hash.c        | 141 +++++++-------
 drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c  |  11 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c |  10 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c  |  14 +-
 .../staging/lustre/lustre/libcfs/libcfs_string.c   |  54 +++---
 .../staging/lustre/lustre/libcfs/linux/linux-cpu.c |  75 ++++----
 .../lustre/lustre/libcfs/linux/linux-crypto.c      |  27 ++-
 .../lustre/lustre/libcfs/linux/linux-curproc.c     |   7 +-
 .../lustre/lustre/libcfs/linux/linux-debug.c       |  23 +--
 .../staging/lustre/lustre/libcfs/linux/linux-mem.c |   2 +-
 .../lustre/lustre/libcfs/linux/linux-module.c      |  10 +-
 .../lustre/lustre/libcfs/linux/linux-tracefile.c   |  36 ++--
 drivers/staging/lustre/lustre/libcfs/module.c      |  28 ++-
 drivers/staging/lustre/lustre/libcfs/prng.c        |  13 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.c   | 214 ++++++++++++---------
 drivers/staging/lustre/lustre/libcfs/tracefile.h   |  87 ++-------
 drivers/staging/lustre/lustre/libcfs/workitem.c    |  41 ++--
 drivers/staging/lustre/lustre/llite/dcache.c       |  10 +-
 drivers/staging/lustre/lustre/llite/dir.c          |  23 +--
 drivers/staging/lustre/lustre/llite/file.c         | 115 ++++++-----
 drivers/staging/lustre/lustre/llite/llite_close.c  |  14 +-
 .../staging/lustre/lustre/llite/llite_internal.h   |  25 ++-
 drivers/staging/lustre/lustre/llite/llite_lib.c    |  61 +++---
 drivers/staging/lustre/lustre/llite/llite_mmap.c   |  14 +-
 drivers/staging/lustre/lustre/llite/llite_rmtacl.c |  10 +-
 drivers/staging/lustre/lustre/llite/lloop.c        |  17 +-
 drivers/staging/lustre/lustre/llite/lproc_llite.c  |  14 +-
 drivers/staging/lustre/lustre/llite/namei.c        |  53 ++---
 drivers/staging/lustre/lustre/llite/rw.c           |  23 ++-
 drivers/staging/lustre/lustre/llite/rw26.c         |  16 +-
 drivers/staging/lustre/lustre/llite/statahead.c    |  40 ++--
 drivers/staging/lustre/lustre/llite/super25.c      |  10 +-
 drivers/staging/lustre/lustre/llite/symlink.c      |   3 +-
 drivers/staging/lustre/lustre/llite/vvp_dev.c      |  16 +-
 drivers/staging/lustre/lustre/llite/vvp_io.c       |  14 +-
 drivers/staging/lustre/lustre/llite/vvp_object.c   |   5 +-
 drivers/staging/lustre/lustre/llite/vvp_page.c     |  22 +--
 drivers/staging/lustre/lustre/llite/xattr.c        |  21 +-
 drivers/staging/lustre/lustre/llite/xattr_cache.c  |  16 +-
 drivers/staging/lustre/lustre/lmv/lmv_intent.c     |  11 +-
 drivers/staging/lustre/lustre/lmv/lmv_internal.h   |   6 +-
 drivers/staging/lustre/lustre/lmv/lmv_obd.c        | 115 +++++------
 drivers/staging/lustre/lustre/lmv/lproc_lmv.c      |   4 +-
 .../staging/lustre/lustre/lov/lov_cl_internal.h    |   6 +-
 drivers/staging/lustre/lustre/lov/lov_dev.c        |  40 ++--
 drivers/staging/lustre/lustre/lov/lov_ea.c         |   4 +-
 drivers/staging/lustre/lustre/lov/lov_internal.h   |   1 -
 drivers/staging/lustre/lustre/lov/lov_io.c         |  30 ++-
 drivers/staging/lustre/lustre/lov/lov_lock.c       |  88 +++------
 drivers/staging/lustre/lustre/lov/lov_obd.c        |  44 ++---
 drivers/staging/lustre/lustre/lov/lov_object.c     |  51 +++--
 drivers/staging/lustre/lustre/lov/lov_offset.c     |   5 -
 drivers/staging/lustre/lustre/lov/lov_pack.c       |   8 +-
 drivers/staging/lustre/lustre/lov/lov_page.c       |   6 +-
 drivers/staging/lustre/lustre/lov/lov_pool.c       |  24 +--
 drivers/staging/lustre/lustre/lov/lov_request.c    |  30 ++-
 drivers/staging/lustre/lustre/lov/lovsub_dev.c     |   5 +-
 drivers/staging/lustre/lustre/lov/lovsub_lock.c    |   4 +-
 drivers/staging/lustre/lustre/lov/lovsub_object.c  |   4 +-
 drivers/staging/lustre/lustre/lov/lproc_lov.c      |  18 +-
 drivers/staging/lustre/lustre/mdc/mdc_lib.c        |  12 +-
 drivers/staging/lustre/lustre/mdc/mdc_locks.c      |  47 ++---
 drivers/staging/lustre/lustre/mdc/mdc_reint.c      |  24 +--
 drivers/staging/lustre/lustre/mdc/mdc_request.c    | 116 ++++++-----
 drivers/staging/lustre/lustre/mgc/mgc_request.c    |  41 ++--
 drivers/staging/lustre/lustre/obdclass/acl.c       |  10 +-
 drivers/staging/lustre/lustre/obdclass/cl_io.c     |  83 ++++----
 drivers/staging/lustre/lustre/obdclass/cl_lock.c   |  47 +++--
 drivers/staging/lustre/lustre/obdclass/cl_object.c |  40 ++--
 drivers/staging/lustre/lustre/obdclass/cl_page.c   |  97 +++++-----
 drivers/staging/lustre/lustre/obdclass/class_obd.c |   8 +-
 drivers/staging/lustre/lustre/obdclass/genops.c    |  38 ++--
 .../lustre/lustre/obdclass/linux/linux-module.c    |   5 +-
 drivers/staging/lustre/lustre/obdclass/llog.c      |  18 +-
 drivers/staging/lustre/lustre/obdclass/llog_cat.c  |   2 +-
 drivers/staging/lustre/lustre/obdclass/llog_obd.c  |   7 +-
 .../lustre/lustre/obdclass/lprocfs_counters.c      |   4 +-
 .../lustre/lustre/obdclass/lprocfs_status.c        |  64 +++---
 drivers/staging/lustre/lustre/obdclass/lu_object.c |  94 +++++----
 .../lustre/lustre/obdclass/lustre_handles.c        |  12 +-
 .../staging/lustre/lustre/obdclass/lustre_peer.c   |   4 +-
 .../staging/lustre/lustre/obdclass/obd_config.c    |  12 +-
 drivers/staging/lustre/lustre/obdclass/obd_mount.c |  37 ++--
 .../staging/lustre/lustre/obdecho/echo_client.c    |  61 +++---
 drivers/staging/lustre/lustre/osc/lproc_osc.c      |   4 +-
 drivers/staging/lustre/lustre/osc/osc_cache.c      | 120 ++++++------
 .../staging/lustre/lustre/osc/osc_cl_internal.h    |   4 +-
 drivers/staging/lustre/lustre/osc/osc_dev.c        |   6 +-
 drivers/staging/lustre/lustre/osc/osc_io.c         |  19 +-
 drivers/staging/lustre/lustre/osc/osc_lock.c       |  61 +++---
 drivers/staging/lustre/lustre/osc/osc_object.c     |   4 +-
 drivers/staging/lustre/lustre/osc/osc_page.c       | 121 ++----------
 drivers/staging/lustre/lustre/osc/osc_quota.c      |  16 +-
 drivers/staging/lustre/lustre/osc/osc_request.c    | 130 ++++++-------
 drivers/staging/lustre/lustre/ptlrpc/client.c      |  75 +++-----
 drivers/staging/lustre/lustre/ptlrpc/connection.c  |   2 +-
 drivers/staging/lustre/lustre/ptlrpc/events.c      |   2 +-
 drivers/staging/lustre/lustre/ptlrpc/import.c      |   9 +-
 drivers/staging/lustre/lustre/ptlrpc/layout.c      |  26 ++-
 drivers/staging/lustre/lustre/ptlrpc/llog_client.c |  20 +-
 drivers/staging/lustre/lustre/ptlrpc/llog_net.c    |   2 +-
 .../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c    |  31 ++-
 drivers/staging/lustre/lustre/ptlrpc/niobuf.c      |  30 ++-
 drivers/staging/lustre/lustre/ptlrpc/nrs.c         |  88 ++++-----
 drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c    |  10 +-
 .../staging/lustre/lustre/ptlrpc/pack_generic.c    |  14 +-
 drivers/staging/lustre/lustre/ptlrpc/pinger.c      |   5 +-
 drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c     |  16 +-
 drivers/staging/lustre/lustre/ptlrpc/recover.c     |   8 +-
 drivers/staging/lustre/lustre/ptlrpc/sec.c         |  54 +++---
 drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c    |  14 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_config.c  |  24 +--
 drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c   |   6 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_null.c    |   4 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_plain.c   |  16 +-
 drivers/staging/lustre/lustre/ptlrpc/service.c     |  76 ++++----
 158 files changed, 1937 insertions(+), 2491 deletions(-)

-- 
2.1.0

[lustre-devel] [PATCH 00/45] Lustre cleanups

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Majority of this patch is Lustre code style cleanups.
NULL comparison style is adjusted for the whole lustre tree
(but not lnet not to interfere with James patches in flight).

Some server-only code was removed in the process.

lustre/libcfs in addition was processed to remove as many checkpatch
warnings as was possible. Assuming this is the end result we
want I will process the rest of the Lustre tree in the similar way next.

Remaining warnings from checkpatch are either due to bugs/problems
in checkpatch (reported) or otherwise do not make sense.
Amongst these are the long printed strings - I know we could do an
exception for that, but this is pending renaming some of our debug
printing primitives, so I guess they just stay as is.

Please consider.

Here's the full list of remaining warnings in
drivers/staging/lustre/lustre/libcfs for those curious:

WARNING: line over 80 characters
#456: FILE: drivers/staging/lustre/lustre/libcfs/debug.c:427:
+			CWARN("You are trying to use a numerical value for the mask - this will be deprecated in a future release.\n");

ERROR: that open brace { should be on the previous line
#2102: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1362:
+cfs_hash_for_each_enter(struct cfs_hash *hs)
+{

ERROR: that open brace { should be on the previous line
#2129: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1389:
+cfs_hash_for_each_exit(struct cfs_hash *hs)
+{

ERROR: that open brace { should be on the previous line
#2160: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1420:
+cfs_hash_for_each_tight(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			void *data, int remove_safe)
+{

ERROR: that open brace { should be on the previous line
#2254: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1514:
+cfs_hash_for_each_safe(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+		       void *data)
+{

ERROR: that open brace { should be on the previous line
#2304: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1564:
+cfs_hash_for_each_relax(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			void *data)
+{

ERROR: that open brace { should be on the previous line
#2370: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1630:
+cfs_hash_for_each_nolock(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			 void *data)
+{

ERROR: that open brace { should be on the previous line
#2402: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1662:
+cfs_hash_for_each_empty(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
+			void *data)
+{

ERROR: that open brace { should be on the previous line
#2459: FILE: drivers/staging/lustre/lustre/libcfs/hash.c:1719:
+cfs_hash_for_each_key(struct cfs_hash *hs, const void *key,
+		      cfs_hash_for_each_cb_t func, void *data)
+{

CHECK: spinlock_t definition without comment
#3125: FILE: drivers/staging/lustre/lustre/libcfs/libcfs_lock.c:55:
+	spinlock_t		*lock;

WARNING: line over 80 characters
#4342: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:317:
+			CDEBUG(D_INFO, "Try to unset cpu %d which is not in CPT-table %p\n",

WARNING: line over 80 characters
#4392: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:367:
+		CDEBUG(D_INFO, "No online CPU is found in the CPU mask for CPU partition %d\n",

WARNING: line over 80 characters
#4588: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:563:
+		CERROR("No online CPU found in CPU partition %d, did someone do CPU hotplug on system? You might need to reload Lustre modules to keep system working well.\n",

WARNING: line over 80 characters
#4748: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:723:
+		CWARN("CPU partition number %d is larger than suggested value (%d), your system may have performance issue or run out of memory while under pressure\n",

WARNING: line over 80 characters
#4753: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:728:
+		CERROR("CPU number %d is not multiple of cpu_npartition %d, please try different cpu_npartitions value or set pattern string by cpu_pattern=STRING\n",

WARNING: line over 80 characters
#4803: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:778:
+		CERROR("Expect %d(%d) CPU partitions but got %d(%d), CPU hotplug/unplug while setting?\n",

WARNING: line over 80 characters
#4814: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:789:
+	CERROR("Failed to setup CPU-partition-table with %d CPU-partitions, online HW nodes: %d, HW cpus: %d.\n",

WARNING: char * array declaration might be better as static const
#5734: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:76:
+	char *envp[] = {

WARNING: line over 80 characters
#5748: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:90:
+		CERROR("Error %d invoking LNET debug log upcall %s %s; check /sys/kernel/debug/lnet/debug_log_upcall\n",

WARNING: char * array declaration might be better as static const
#5760: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:102:
+	char *envp[] = {

WARNING: line over 80 characters
#5774: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:116:
+		CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; check /sys/kernel/debug/lnet/upcall\n",

WARNING: memory barrier without comment
#5837: FILE: drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c:179:
+	mb();

CHECK: Alignment should match open parenthesis
#6672: FILE: drivers/staging/lustre/lustre/libcfs/module.c:148:
+					err = libcfs_ioctl_popdata(arg,
+							data, sizeof(*data));

WARNING: line over 80 characters
#7369: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.c:49:
+union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS] __cacheline_aligned;

WARNING: memory barrier without comment
#7839: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.c:519:
+	mb();

CHECK: extern prototypes should be avoided in .h files
#8710: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.h:187:
+extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];

ERROR: Macros with complex values should be enclosed in parentheses
#8712: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.h:189:
+#define cfs_tcd_for_each(tcd, i, j)				       \
+	for (i = 0; cfs_trace_data[i]; i++)				\
+		for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd);	\
+		     j < num_possible_cpus();				 \
+		     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)

CHECK: Concatenated strings should use spaces between elements
#8774: FILE: drivers/staging/lustre/lustre/libcfs/tracefile.h:251:
+		cfs_trace_assertion_failed("ASSERTION("#cond") failed", \

CHECK: Alignment should match open parenthesis
#9075: FILE: drivers/staging/lustre/lustre/libcfs/workitem.c:280:
+		rc = wait_event_interruptible_exclusive(sched->ws_waitq,
+						!cfs_wi_sched_cansleep(sched));


Oleg Drokin (45):
  staging/lustre/ptlrpc: Get rid of /proc references in comments
  staging/lustre/obdclass: Get rid of /proc references in comments.
  staging/lustre/libcfs: Get rid of /proc references in comments
  staging/lustre/llite: Get rid of /proc references in comments
  staging/lustre/lov: Get rid of /proc references in comments
  staging/lustre: Remove unused function oti_init
  staging/lustre: Remove unused osc_on_mdt function
  staging/lustre: Remove server code from client_obd_setup()
  staging/lustre: Remove server code from class_get_type()
  staging/lustre: Remove commented out lock_lock_multi_match
  staging/lustre/osc: Remove commented out osc_page_protected()
  staging/lustre/libcfs: Adjust NULL comparison codestyle
  staging/lustre/lov: Adjust NULL comparison codestyle
  staging/lustre/llite: Adjust NULL comparison codestyle
  staging/lustre/ldlm: Adjust NULL comparison codestyle
  staging/lustre/lmv: Adjust NULL comparison codestyle
  staging/lustre/fid: Adjust NULL comparison codestyle
  staging/lustre/fld: Adjust NULL comparison codestyle
  staging/lustre/lclient: Adjust NULL comparison codestyle
  staging/lustre/include: Adjust NULL comparison codestyle
  staging/lustre/mdc: Adjust NULL comparison codestyle
  staging/lustre/mgc: Adjust NULL comparison codestyle
  staging/lustre/obdclass: Adjust NULL comparison codestyle
  staging/lustre/obdecho: Adjust NULL comparison codestyle
  staging/lustre/osc: Adjust NULL comparison codestyle
  staging/lustre/ptlrpc: Adjust NULL comparison codestyle
  staging/lustre: Remove the "write to FSF to get a copy of GPL" wording
  staging/lustre/libcfs: Cleanup: parenthesis alignment adjustments
  staging/lustre/libcfs: Move EXPORT_SYMBOLs under function/variable
  staging/lustre/libcfs: style change to add missing spaces for
    operations
  staging/lustre/libcfs: reformat cfs_tcd_for_each_type_lock define
  staging/lustre/libcfs: Remove stray spaces after function name
  staging/lustre/libcfs: Shortened too long lines
  staging/lustre/libcfs: Remove unused cfs_tcd_owns_tage() function
  staging/lustre/libcfs: Move private tracefile structs out of header
  staging/lustre/libcfs: Update comments style to match kernel
  staging/lustre/libcfs: Remove useless returns in void functions
  staging/lustre/libcfs: Remove empty lines after/before braces
  staging/lustre: Update cfs_cpu_notify switch statement with a comment
  staging/lustre: Get rid of cfs_trace_buf_type_t typedef
  staging/lustre/libcfs: Get rid of multiple assignments
  staging/lustre: Remove space after cast in cfs_crypto_hash_final()
  staging/lustre/libcfs: Replace use of printk with pr_<level>
  staging/lustre: Convert cfs_trace_daemon_command to use kstrtoul
  staging/lustre: Convert cfs_str2num_check to use kstrtoul

 .../staging/lustre/include/linux/lnet/lnetctl.h    |   4 -
 .../staging/lustre/lnet/klnds/socklnd/socklnd.h    |   4 -
 .../staging/lustre/lnet/klnds/socklnd/socklnd_cb.c |   3 -
 .../lustre/lnet/klnds/socklnd/socklnd_modparams.c  |   3 -
 .../lustre/lnet/klnds/socklnd/socklnd_proto.c      |   3 -
 drivers/staging/lustre/lnet/lnet/router.c          |   4 -
 drivers/staging/lustre/lnet/lnet/router_proc.c     |   4 -
 drivers/staging/lustre/lustre/fid/fid_request.c    |  14 +-
 drivers/staging/lustre/lustre/fid/lproc_fid.c      |  14 +-
 drivers/staging/lustre/lustre/fld/fld_cache.c      |  10 +-
 drivers/staging/lustre/lustre/fld/fld_internal.h   |   2 +-
 drivers/staging/lustre/lustre/fld/fld_request.c    |  32 ++-
 drivers/staging/lustre/lustre/fld/lproc_fld.c      |  11 +-
 drivers/staging/lustre/lustre/include/cl_object.h  |   8 +-
 drivers/staging/lustre/lustre/include/lclient.h    |   4 +-
 drivers/staging/lustre/lustre/include/linux/obd.h  |   6 +-
 .../staging/lustre/lustre/include/lprocfs_status.h |   8 +-
 drivers/staging/lustre/lustre/include/lu_object.h  |   6 +-
 drivers/staging/lustre/lustre/include/lu_ref.h     |   4 -
 .../lustre/lustre/include/lustre/lustre_idl.h      |   6 +-
 drivers/staging/lustre/lustre/include/lustre_cfg.h |   5 +-
 drivers/staging/lustre/lustre/include/lustre_dlm.h |  18 +-
 .../staging/lustre/lustre/include/lustre_export.h  |  11 --
 drivers/staging/lustre/lustre/include/lustre_lib.h |   8 +-
 drivers/staging/lustre/lustre/include/lustre_log.h |  12 +-
 drivers/staging/lustre/lustre/include/lustre_mdc.h |  10 +-
 drivers/staging/lustre/lustre/include/lustre_net.h |  15 +-
 drivers/staging/lustre/lustre/include/obd.h        |  43 +----
 drivers/staging/lustre/lustre/include/obd_class.h  |  49 +++--
 .../staging/lustre/lustre/include/obd_support.h    |   1 -
 drivers/staging/lustre/lustre/lclient/lcommon_cl.c |  32 +--
 drivers/staging/lustre/lustre/ldlm/interval_tree.c |   2 -
 drivers/staging/lustre/lustre/ldlm/ldlm_extent.c   |   9 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_flock.c    |  13 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c      |  60 +-----
 drivers/staging/lustre/lustre/ldlm/ldlm_lock.c     |  65 +++----
 drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c    |  45 +++--
 drivers/staging/lustre/lustre/ldlm/ldlm_pool.c     |  17 +-
 drivers/staging/lustre/lustre/ldlm/ldlm_request.c  |  65 +++----
 drivers/staging/lustre/lustre/ldlm/ldlm_resource.c |  25 ++-
 drivers/staging/lustre/lustre/libcfs/debug.c       |  31 ++-
 drivers/staging/lustre/lustre/libcfs/fail.c        |   3 +-
 drivers/staging/lustre/lustre/libcfs/hash.c        | 141 +++++++-------
 drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c  |  11 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c |  10 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c  |  14 +-
 .../staging/lustre/lustre/libcfs/libcfs_string.c   |  54 +++---
 .../staging/lustre/lustre/libcfs/linux/linux-cpu.c |  75 ++++----
 .../lustre/lustre/libcfs/linux/linux-crypto.c      |  27 ++-
 .../lustre/lustre/libcfs/linux/linux-curproc.c     |   7 +-
 .../lustre/lustre/libcfs/linux/linux-debug.c       |  23 +--
 .../staging/lustre/lustre/libcfs/linux/linux-mem.c |   2 +-
 .../lustre/lustre/libcfs/linux/linux-module.c      |  10 +-
 .../lustre/lustre/libcfs/linux/linux-tracefile.c   |  36 ++--
 drivers/staging/lustre/lustre/libcfs/module.c      |  28 ++-
 drivers/staging/lustre/lustre/libcfs/prng.c        |  13 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.c   | 214 ++++++++++++---------
 drivers/staging/lustre/lustre/libcfs/tracefile.h   |  87 ++-------
 drivers/staging/lustre/lustre/libcfs/workitem.c    |  41 ++--
 drivers/staging/lustre/lustre/llite/dcache.c       |  10 +-
 drivers/staging/lustre/lustre/llite/dir.c          |  23 +--
 drivers/staging/lustre/lustre/llite/file.c         | 115 ++++++-----
 drivers/staging/lustre/lustre/llite/llite_close.c  |  14 +-
 .../staging/lustre/lustre/llite/llite_internal.h   |  25 ++-
 drivers/staging/lustre/lustre/llite/llite_lib.c    |  61 +++---
 drivers/staging/lustre/lustre/llite/llite_mmap.c   |  14 +-
 drivers/staging/lustre/lustre/llite/llite_rmtacl.c |  10 +-
 drivers/staging/lustre/lustre/llite/lloop.c        |  17 +-
 drivers/staging/lustre/lustre/llite/lproc_llite.c  |  14 +-
 drivers/staging/lustre/lustre/llite/namei.c        |  53 ++---
 drivers/staging/lustre/lustre/llite/rw.c           |  23 ++-
 drivers/staging/lustre/lustre/llite/rw26.c         |  16 +-
 drivers/staging/lustre/lustre/llite/statahead.c    |  40 ++--
 drivers/staging/lustre/lustre/llite/super25.c      |  10 +-
 drivers/staging/lustre/lustre/llite/symlink.c      |   3 +-
 drivers/staging/lustre/lustre/llite/vvp_dev.c      |  16 +-
 drivers/staging/lustre/lustre/llite/vvp_io.c       |  14 +-
 drivers/staging/lustre/lustre/llite/vvp_object.c   |   5 +-
 drivers/staging/lustre/lustre/llite/vvp_page.c     |  22 +--
 drivers/staging/lustre/lustre/llite/xattr.c        |  21 +-
 drivers/staging/lustre/lustre/llite/xattr_cache.c  |  16 +-
 drivers/staging/lustre/lustre/lmv/lmv_intent.c     |  11 +-
 drivers/staging/lustre/lustre/lmv/lmv_internal.h   |   6 +-
 drivers/staging/lustre/lustre/lmv/lmv_obd.c        | 115 +++++------
 drivers/staging/lustre/lustre/lmv/lproc_lmv.c      |   4 +-
 .../staging/lustre/lustre/lov/lov_cl_internal.h    |   6 +-
 drivers/staging/lustre/lustre/lov/lov_dev.c        |  40 ++--
 drivers/staging/lustre/lustre/lov/lov_ea.c         |   4 +-
 drivers/staging/lustre/lustre/lov/lov_internal.h   |   1 -
 drivers/staging/lustre/lustre/lov/lov_io.c         |  30 ++-
 drivers/staging/lustre/lustre/lov/lov_lock.c       |  88 +++------
 drivers/staging/lustre/lustre/lov/lov_obd.c        |  44 ++---
 drivers/staging/lustre/lustre/lov/lov_object.c     |  51 +++--
 drivers/staging/lustre/lustre/lov/lov_offset.c     |   5 -
 drivers/staging/lustre/lustre/lov/lov_pack.c       |   8 +-
 drivers/staging/lustre/lustre/lov/lov_page.c       |   6 +-
 drivers/staging/lustre/lustre/lov/lov_pool.c       |  24 +--
 drivers/staging/lustre/lustre/lov/lov_request.c    |  30 ++-
 drivers/staging/lustre/lustre/lov/lovsub_dev.c     |   5 +-
 drivers/staging/lustre/lustre/lov/lovsub_lock.c    |   4 +-
 drivers/staging/lustre/lustre/lov/lovsub_object.c  |   4 +-
 drivers/staging/lustre/lustre/lov/lproc_lov.c      |  18 +-
 drivers/staging/lustre/lustre/mdc/mdc_lib.c        |  12 +-
 drivers/staging/lustre/lustre/mdc/mdc_locks.c      |  47 ++---
 drivers/staging/lustre/lustre/mdc/mdc_reint.c      |  24 +--
 drivers/staging/lustre/lustre/mdc/mdc_request.c    | 116 ++++++-----
 drivers/staging/lustre/lustre/mgc/mgc_request.c    |  41 ++--
 drivers/staging/lustre/lustre/obdclass/acl.c       |  10 +-
 drivers/staging/lustre/lustre/obdclass/cl_io.c     |  83 ++++----
 drivers/staging/lustre/lustre/obdclass/cl_lock.c   |  47 +++--
 drivers/staging/lustre/lustre/obdclass/cl_object.c |  40 ++--
 drivers/staging/lustre/lustre/obdclass/cl_page.c   |  97 +++++-----
 drivers/staging/lustre/lustre/obdclass/class_obd.c |   8 +-
 drivers/staging/lustre/lustre/obdclass/genops.c    |  38 ++--
 .../lustre/lustre/obdclass/linux/linux-module.c    |   5 +-
 drivers/staging/lustre/lustre/obdclass/llog.c      |  18 +-
 drivers/staging/lustre/lustre/obdclass/llog_cat.c  |   2 +-
 drivers/staging/lustre/lustre/obdclass/llog_obd.c  |   7 +-
 .../lustre/lustre/obdclass/lprocfs_counters.c      |   4 +-
 .../lustre/lustre/obdclass/lprocfs_status.c        |  64 +++---
 drivers/staging/lustre/lustre/obdclass/lu_object.c |  94 +++++----
 .../lustre/lustre/obdclass/lustre_handles.c        |  12 +-
 .../staging/lustre/lustre/obdclass/lustre_peer.c   |   4 +-
 .../staging/lustre/lustre/obdclass/obd_config.c    |  12 +-
 drivers/staging/lustre/lustre/obdclass/obd_mount.c |  37 ++--
 .../staging/lustre/lustre/obdecho/echo_client.c    |  61 +++---
 drivers/staging/lustre/lustre/osc/lproc_osc.c      |   4 +-
 drivers/staging/lustre/lustre/osc/osc_cache.c      | 120 ++++++------
 .../staging/lustre/lustre/osc/osc_cl_internal.h    |   4 +-
 drivers/staging/lustre/lustre/osc/osc_dev.c        |   6 +-
 drivers/staging/lustre/lustre/osc/osc_io.c         |  19 +-
 drivers/staging/lustre/lustre/osc/osc_lock.c       |  61 +++---
 drivers/staging/lustre/lustre/osc/osc_object.c     |   4 +-
 drivers/staging/lustre/lustre/osc/osc_page.c       | 121 ++----------
 drivers/staging/lustre/lustre/osc/osc_quota.c      |  16 +-
 drivers/staging/lustre/lustre/osc/osc_request.c    | 130 ++++++-------
 drivers/staging/lustre/lustre/ptlrpc/client.c      |  75 +++-----
 drivers/staging/lustre/lustre/ptlrpc/connection.c  |   2 +-
 drivers/staging/lustre/lustre/ptlrpc/events.c      |   2 +-
 drivers/staging/lustre/lustre/ptlrpc/import.c      |   9 +-
 drivers/staging/lustre/lustre/ptlrpc/layout.c      |  26 ++-
 drivers/staging/lustre/lustre/ptlrpc/llog_client.c |  20 +-
 drivers/staging/lustre/lustre/ptlrpc/llog_net.c    |   2 +-
 .../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c    |  31 ++-
 drivers/staging/lustre/lustre/ptlrpc/niobuf.c      |  30 ++-
 drivers/staging/lustre/lustre/ptlrpc/nrs.c         |  88 ++++-----
 drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c    |  10 +-
 .../staging/lustre/lustre/ptlrpc/pack_generic.c    |  14 +-
 drivers/staging/lustre/lustre/ptlrpc/pinger.c      |   5 +-
 drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c     |  16 +-
 drivers/staging/lustre/lustre/ptlrpc/recover.c     |   8 +-
 drivers/staging/lustre/lustre/ptlrpc/sec.c         |  54 +++---
 drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c    |  14 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_config.c  |  24 +--
 drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c   |   6 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_null.c    |   4 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_plain.c   |  16 +-
 drivers/staging/lustre/lustre/ptlrpc/service.c     |  76 ++++----
 158 files changed, 1937 insertions(+), 2491 deletions(-)

-- 
2.1.0

[PATCH 01/45] staging/lustre/ptlrpc: Get rid of /proc references in comments

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/lustre_dlm.h | 2 +-
 drivers/staging/lustre/lustre/include/lustre_net.h | 2 +-
 drivers/staging/lustre/lustre/ptlrpc/recover.c     | 2 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c    | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre_dlm.h b/drivers/staging/lustre/lustre/include/lustre_dlm.h
index 9b319f1..11a841a 100644
--- a/drivers/staging/lustre/lustre/include/lustre_dlm.h
+++ b/drivers/staging/lustre/lustre/include/lustre_dlm.h
@@ -373,7 +373,7 @@ struct ldlm_namespace {
 
 	/**
 	 * Namespace connect flags supported by server (may be changed via
-	 * /proc, LRU resize may be disabled/enabled).
+	 * sysfs, LRU resize may be disabled/enabled).
 	 */
 	__u64			ns_connect_flags;
 
diff --git a/drivers/staging/lustre/lustre/include/lustre_net.h b/drivers/staging/lustre/lustre/include/lustre_net.h
index d834ddd..d9c7267 100644
--- a/drivers/staging/lustre/lustre/include/lustre_net.h
+++ b/drivers/staging/lustre/lustre/include/lustre_net.h
@@ -1947,7 +1947,7 @@ struct ptlrpc_service_ops {
  * or general metadata service for MDS.
  */
 struct ptlrpc_service {
-	/** serialize /proc operations */
+	/** serialize sysfs operations */
 	spinlock_t			srv_lock;
 	/** most often accessed fields */
 	/** chain thru all services */
diff --git a/drivers/staging/lustre/lustre/ptlrpc/recover.c b/drivers/staging/lustre/lustre/ptlrpc/recover.c
index db6626c..4359cac 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/recover.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/recover.c
@@ -260,7 +260,7 @@ void ptlrpc_request_handle_notconn(struct ptlrpc_request *failed_req)
  * Administratively active/deactive a client.
  * This should only be called by the ioctl interface, currently
  *  - the lctl deactivate and activate commands
- *  - echo 0/1 >> /proc/osc/XXX/active
+ *  - echo 0/1 >> /sys/fs/lustre/osc/XXX/active
  *  - client umount -f (ll_umount_begin)
  */
 int ptlrpc_set_import_active(struct obd_import *imp, int active)
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 22621c7..52a6c51 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -120,7 +120,7 @@ static struct ptlrpc_enc_page_pool {
 } page_pools;
 
 /*
- * /proc/fs/lustre/sptlrpc/encrypt_page_pools
+ * /sys/kernel/debug/lustre/sptlrpc/encrypt_page_pools
  */
 int sptlrpc_proc_enc_pool_seq_show(struct seq_file *m, void *v)
 {
-- 
2.1.0

[lustre-devel] [PATCH 01/45] staging/lustre/ptlrpc: Get rid of /proc references in comments

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/lustre_dlm.h | 2 +-
 drivers/staging/lustre/lustre/include/lustre_net.h | 2 +-
 drivers/staging/lustre/lustre/ptlrpc/recover.c     | 2 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c    | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre_dlm.h b/drivers/staging/lustre/lustre/include/lustre_dlm.h
index 9b319f1..11a841a 100644
--- a/drivers/staging/lustre/lustre/include/lustre_dlm.h
+++ b/drivers/staging/lustre/lustre/include/lustre_dlm.h
@@ -373,7 +373,7 @@ struct ldlm_namespace {
 
 	/**
 	 * Namespace connect flags supported by server (may be changed via
-	 * /proc, LRU resize may be disabled/enabled).
+	 * sysfs, LRU resize may be disabled/enabled).
 	 */
 	__u64			ns_connect_flags;
 
diff --git a/drivers/staging/lustre/lustre/include/lustre_net.h b/drivers/staging/lustre/lustre/include/lustre_net.h
index d834ddd..d9c7267 100644
--- a/drivers/staging/lustre/lustre/include/lustre_net.h
+++ b/drivers/staging/lustre/lustre/include/lustre_net.h
@@ -1947,7 +1947,7 @@ struct ptlrpc_service_ops {
  * or general metadata service for MDS.
  */
 struct ptlrpc_service {
-	/** serialize /proc operations */
+	/** serialize sysfs operations */
 	spinlock_t			srv_lock;
 	/** most often accessed fields */
 	/** chain thru all services */
diff --git a/drivers/staging/lustre/lustre/ptlrpc/recover.c b/drivers/staging/lustre/lustre/ptlrpc/recover.c
index db6626c..4359cac 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/recover.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/recover.c
@@ -260,7 +260,7 @@ void ptlrpc_request_handle_notconn(struct ptlrpc_request *failed_req)
  * Administratively active/deactive a client.
  * This should only be called by the ioctl interface, currently
  *  - the lctl deactivate and activate commands
- *  - echo 0/1 >> /proc/osc/XXX/active
+ *  - echo 0/1 >> /sys/fs/lustre/osc/XXX/active
  *  - client umount -f (ll_umount_begin)
  */
 int ptlrpc_set_import_active(struct obd_import *imp, int active)
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 22621c7..52a6c51 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -120,7 +120,7 @@ static struct ptlrpc_enc_page_pool {
 } page_pools;
 
 /*
- * /proc/fs/lustre/sptlrpc/encrypt_page_pools
+ * /sys/kernel/debug/lustre/sptlrpc/encrypt_page_pools
  */
 int sptlrpc_proc_enc_pool_seq_show(struct seq_file *m, void *v)
 {
-- 
2.1.0

[PATCH 02/45] staging/lustre/obdclass: Get rid of /proc references in comments.

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/cl_object.h       | 2 +-
 drivers/staging/lustre/lustre/include/lprocfs_status.h  | 2 +-
 drivers/staging/lustre/lustre/include/obd.h             | 7 ++++---
 drivers/staging/lustre/lustre/obdclass/class_obd.c      | 4 ++--
 drivers/staging/lustre/lustre/obdclass/lprocfs_status.c | 8 ++++----
 5 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/cl_object.h b/drivers/staging/lustre/lustre/include/cl_object.h
index bd7acc2..c8f4569 100644
--- a/drivers/staging/lustre/lustre/include/cl_object.h
+++ b/drivers/staging/lustre/lustre/include/cl_object.h
@@ -2613,7 +2613,7 @@ struct cl_site {
 	 * Statistical counters. Atomics do not scale, something better like
 	 * per-cpu counters is needed.
 	 *
-	 * These are exported as /proc/fs/lustre/llite/.../site
+	 * These are exported as /sys/kernel/debug/lustre/llite/.../site
 	 *
 	 * When interpreting keep in mind that both sub-locks (and sub-pages)
 	 * and top-locks (and top-pages) are accounted here.
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index fb13094..97c2d7e 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -54,7 +54,7 @@ struct lprocfs_vars {
 	struct file_operations	*fops;
 	void			*data;
 	/**
-	 * /proc file mode.
+	 * sysfs file mode.
 	 */
 	umode_t			proc_mode;
 };
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index f00d9a2..514e12b 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -302,7 +302,7 @@ struct client_obd {
 	struct list_head	       cl_loi_read_list;
 	int		      cl_r_in_flight;
 	int		      cl_w_in_flight;
-	/* just a sum of the loi/lop pending numbers to be exported by /proc */
+	/* just a sum of the loi/lop pending numbers to be exported by sysfs */
 	atomic_t	     cl_pending_w_pages;
 	atomic_t	     cl_pending_r_pages;
 	__u32			 cl_max_pages_per_rpc;
@@ -449,7 +449,7 @@ struct pool_desc {
 	struct lov_qos_rr     pool_rr;		/* round robin qos */
 	struct hlist_node      pool_hash;	      /* access by poolname */
 	struct list_head	    pool_list;	      /* serial access */
-	struct dentry		*pool_debugfs_entry;	/* file in /proc */
+	struct dentry		*pool_debugfs_entry;	/* file in debugfs */
 	struct obd_device    *pool_lobd;	/* obd of the lov/lod to which
 						*  this pool belongs */
 };
@@ -737,7 +737,8 @@ struct obd_device {
 		      obd_async_recov:1,   /* allow asynchronous orphan cleanup */
 		      obd_no_conn:1,       /* deny new connections */
 		      obd_inactive:1,      /* device active/inactive
-					   * (for /proc/status only!!) */
+					    * (for sysfs status only!!)
+					    */
 		      obd_no_ir:1,	 /* no imperative recovery. */
 		      obd_process_conf:1;  /* device is processing mgs config */
 	/* use separate field as it is set in interrupt to don't mess with
diff --git a/drivers/staging/lustre/lustre/obdclass/class_obd.c b/drivers/staging/lustre/lustre/obdclass/class_obd.c
index 65cf46c..84f6880 100644
--- a/drivers/staging/lustre/lustre/obdclass/class_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/class_obd.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(obd_devs);
 struct list_head obd_types;
 DEFINE_RWLOCK(obd_dev_lock);
 
-/* The following are visible and mutable through /proc/sys/lustre/. */
+/* The following are visible and mutable through /sys/fs/lustre. */
 unsigned int obd_debug_peer_on_timeout;
 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 unsigned int obd_dump_on_timeout;
@@ -67,7 +67,7 @@ unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
 EXPORT_SYMBOL(obd_timeout);
 unsigned int obd_timeout_set;
 EXPORT_SYMBOL(obd_timeout_set);
-/* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
+/* Adaptive timeout defs here instead of ptlrpc module for /sys/fs/ access */
 unsigned int at_min;
 EXPORT_SYMBOL(at_min);
 unsigned int at_max = 600;
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index eda44d8..a7e22e0 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -149,10 +149,10 @@ int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
 		}
 		/*
 		 * Need to think these cases :
-		 *      1. #echo x.00 > /proc/xxx       output result : x
-		 *      2. #echo x.0x > /proc/xxx       output result : x.0x
-		 *      3. #echo x.x0 > /proc/xxx       output result : x.x
-		 *      4. #echo x.xx > /proc/xxx       output result : x.xx
+		 *      1. #echo x.00 > /sys/xxx       output result : x
+		 *      2. #echo x.0x > /sys/xxx       output result : x.0x
+		 *      3. #echo x.x0 > /sys/xxx       output result : x.x
+		 *      4. #echo x.xx > /sys/xxx       output result : x.xx
 		 *      Only reserved 2 bits fraction.
 		 */
 		for (i = 0; i < (5 - prtn); i++)
-- 
2.1.0

[lustre-devel] [PATCH 02/45] staging/lustre/obdclass: Get rid of /proc references in comments.

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/cl_object.h       | 2 +-
 drivers/staging/lustre/lustre/include/lprocfs_status.h  | 2 +-
 drivers/staging/lustre/lustre/include/obd.h             | 7 ++++---
 drivers/staging/lustre/lustre/obdclass/class_obd.c      | 4 ++--
 drivers/staging/lustre/lustre/obdclass/lprocfs_status.c | 8 ++++----
 5 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/cl_object.h b/drivers/staging/lustre/lustre/include/cl_object.h
index bd7acc2..c8f4569 100644
--- a/drivers/staging/lustre/lustre/include/cl_object.h
+++ b/drivers/staging/lustre/lustre/include/cl_object.h
@@ -2613,7 +2613,7 @@ struct cl_site {
 	 * Statistical counters. Atomics do not scale, something better like
 	 * per-cpu counters is needed.
 	 *
-	 * These are exported as /proc/fs/lustre/llite/.../site
+	 * These are exported as /sys/kernel/debug/lustre/llite/.../site
 	 *
 	 * When interpreting keep in mind that both sub-locks (and sub-pages)
 	 * and top-locks (and top-pages) are accounted here.
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index fb13094..97c2d7e 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -54,7 +54,7 @@ struct lprocfs_vars {
 	struct file_operations	*fops;
 	void			*data;
 	/**
-	 * /proc file mode.
+	 * sysfs file mode.
 	 */
 	umode_t			proc_mode;
 };
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index f00d9a2..514e12b 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -302,7 +302,7 @@ struct client_obd {
 	struct list_head	       cl_loi_read_list;
 	int		      cl_r_in_flight;
 	int		      cl_w_in_flight;
-	/* just a sum of the loi/lop pending numbers to be exported by /proc */
+	/* just a sum of the loi/lop pending numbers to be exported by sysfs */
 	atomic_t	     cl_pending_w_pages;
 	atomic_t	     cl_pending_r_pages;
 	__u32			 cl_max_pages_per_rpc;
@@ -449,7 +449,7 @@ struct pool_desc {
 	struct lov_qos_rr     pool_rr;		/* round robin qos */
 	struct hlist_node      pool_hash;	      /* access by poolname */
 	struct list_head	    pool_list;	      /* serial access */
-	struct dentry		*pool_debugfs_entry;	/* file in /proc */
+	struct dentry		*pool_debugfs_entry;	/* file in debugfs */
 	struct obd_device    *pool_lobd;	/* obd of the lov/lod to which
 						*  this pool belongs */
 };
@@ -737,7 +737,8 @@ struct obd_device {
 		      obd_async_recov:1,   /* allow asynchronous orphan cleanup */
 		      obd_no_conn:1,       /* deny new connections */
 		      obd_inactive:1,      /* device active/inactive
-					   * (for /proc/status only!!) */
+					    * (for sysfs status only!!)
+					    */
 		      obd_no_ir:1,	 /* no imperative recovery. */
 		      obd_process_conf:1;  /* device is processing mgs config */
 	/* use separate field as it is set in interrupt to don't mess with
diff --git a/drivers/staging/lustre/lustre/obdclass/class_obd.c b/drivers/staging/lustre/lustre/obdclass/class_obd.c
index 65cf46c..84f6880 100644
--- a/drivers/staging/lustre/lustre/obdclass/class_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/class_obd.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(obd_devs);
 struct list_head obd_types;
 DEFINE_RWLOCK(obd_dev_lock);
 
-/* The following are visible and mutable through /proc/sys/lustre/. */
+/* The following are visible and mutable through /sys/fs/lustre. */
 unsigned int obd_debug_peer_on_timeout;
 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
 unsigned int obd_dump_on_timeout;
@@ -67,7 +67,7 @@ unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
 EXPORT_SYMBOL(obd_timeout);
 unsigned int obd_timeout_set;
 EXPORT_SYMBOL(obd_timeout_set);
-/* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
+/* Adaptive timeout defs here instead of ptlrpc module for /sys/fs/ access */
 unsigned int at_min;
 EXPORT_SYMBOL(at_min);
 unsigned int at_max = 600;
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index eda44d8..a7e22e0 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -149,10 +149,10 @@ int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
 		}
 		/*
 		 * Need to think these cases :
-		 *      1. #echo x.00 > /proc/xxx       output result : x
-		 *      2. #echo x.0x > /proc/xxx       output result : x.0x
-		 *      3. #echo x.x0 > /proc/xxx       output result : x.x
-		 *      4. #echo x.xx > /proc/xxx       output result : x.xx
+		 *      1. #echo x.00 > /sys/xxx       output result : x
+		 *      2. #echo x.0x > /sys/xxx       output result : x.0x
+		 *      3. #echo x.x0 > /sys/xxx       output result : x.x
+		 *      4. #echo x.xx > /sys/xxx       output result : x.xx
 		 *      Only reserved 2 bits fraction.
 		 */
 		for (i = 0; i < (5 - prtn); i++)
-- 
2.1.0

[PATCH 03/45] staging/lustre/libcfs: Get rid of /proc references in comments

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c | 4 ++--
 drivers/staging/lustre/lustre/libcfs/module.c            | 4 ----
 drivers/staging/lustre/lustre/libcfs/tracefile.c         | 7 ++++---
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 59c7bf3..3358c3b 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -87,7 +87,7 @@ void libcfs_run_debug_log_upcall(char *file)
 
 	rc = call_usermodehelper(argv[0], argv, envp, 1);
 	if (rc < 0 && rc != -ENOENT) {
-		CERROR("Error %d invoking LNET debug log upcall %s %s; check /proc/sys/lnet/debug_log_upcall\n",
+		CERROR("Error %d invoking LNET debug log upcall %s %s; check /sys/kernel/debug/lnet/debug_log_upcall\n",
 		       rc, argv[0], argv[1]);
 	} else {
 		CDEBUG(D_HA, "Invoked LNET debug log upcall %s %s\n",
@@ -113,7 +113,7 @@ void libcfs_run_upcall(char **argv)
 
 	rc = call_usermodehelper(argv[0], argv, envp, 1);
 	if (rc < 0 && rc != -ENOENT) {
-		CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; check /proc/sys/lnet/upcall\n",
+		CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; check /sys/kernel/debug/lnet/upcall\n",
 		       rc, argv[0], argv[1],
 		       argc < 3 ? "" : ",", argc < 3 ? "" : argv[2],
 		       argc < 4 ? "" : ",", argc < 4 ? "" : argv[3],
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 611607a..45838b5 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -368,10 +368,6 @@ static int proc_cpt_table(struct ctl_table *table, int write,
 }
 
 static struct ctl_table lnet_table[] = {
-	/*
-	 * NB No .strategy entries have been provided since sysctl(8) prefers
-	 * to go via /proc for portability.
-	 */
 	{
 		.procname = "debug",
 		.data     = &libcfs_debug,
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 65c4f1a..a7d9b78 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -771,9 +771,10 @@ EXPORT_SYMBOL(cfs_trace_copyin_string);
 int cfs_trace_copyout_string(char __user *usr_buffer, int usr_buffer_nob,
 			     const char *knl_buffer, char *append)
 {
-	/* NB if 'append' != NULL, it's a single character to append to the
-	 * copied out string - usually "\n", for /proc entries and "" (i.e. a
-	 * terminating zero byte) for sysctl entries */
+	/*
+	 * NB if 'append' != NULL, it's a single character to append to the
+	 * copied out string - usually "\n" or "" (i.e. a terminating zero byte)
+	 */
 	int   nob = strlen(knl_buffer);
 
 	if (nob > usr_buffer_nob)
-- 
2.1.0

[lustre-devel] [PATCH 03/45] staging/lustre/libcfs: Get rid of /proc references in comments

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c | 4 ++--
 drivers/staging/lustre/lustre/libcfs/module.c            | 4 ----
 drivers/staging/lustre/lustre/libcfs/tracefile.c         | 7 ++++---
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 59c7bf3..3358c3b 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -87,7 +87,7 @@ void libcfs_run_debug_log_upcall(char *file)
 
 	rc = call_usermodehelper(argv[0], argv, envp, 1);
 	if (rc < 0 && rc != -ENOENT) {
-		CERROR("Error %d invoking LNET debug log upcall %s %s; check /proc/sys/lnet/debug_log_upcall\n",
+		CERROR("Error %d invoking LNET debug log upcall %s %s; check /sys/kernel/debug/lnet/debug_log_upcall\n",
 		       rc, argv[0], argv[1]);
 	} else {
 		CDEBUG(D_HA, "Invoked LNET debug log upcall %s %s\n",
@@ -113,7 +113,7 @@ void libcfs_run_upcall(char **argv)
 
 	rc = call_usermodehelper(argv[0], argv, envp, 1);
 	if (rc < 0 && rc != -ENOENT) {
-		CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; check /proc/sys/lnet/upcall\n",
+		CERROR("Error %d invoking LNET upcall %s %s%s%s%s%s%s%s%s; check /sys/kernel/debug/lnet/upcall\n",
 		       rc, argv[0], argv[1],
 		       argc < 3 ? "" : ",", argc < 3 ? "" : argv[2],
 		       argc < 4 ? "" : ",", argc < 4 ? "" : argv[3],
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 611607a..45838b5 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -368,10 +368,6 @@ static int proc_cpt_table(struct ctl_table *table, int write,
 }
 
 static struct ctl_table lnet_table[] = {
-	/*
-	 * NB No .strategy entries have been provided since sysctl(8) prefers
-	 * to go via /proc for portability.
-	 */
 	{
 		.procname = "debug",
 		.data     = &libcfs_debug,
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 65c4f1a..a7d9b78 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -771,9 +771,10 @@ EXPORT_SYMBOL(cfs_trace_copyin_string);
 int cfs_trace_copyout_string(char __user *usr_buffer, int usr_buffer_nob,
 			     const char *knl_buffer, char *append)
 {
-	/* NB if 'append' != NULL, it's a single character to append to the
-	 * copied out string - usually "\n", for /proc entries and "" (i.e. a
-	 * terminating zero byte) for sysctl entries */
+	/*
+	 * NB if 'append' != NULL, it's a single character to append to the
+	 * copied out string - usually "\n" or "" (i.e. a terminating zero byte)
+	 */
 	int   nob = strlen(knl_buffer);
 
 	if (nob > usr_buffer_nob)
-- 
2.1.0

[PATCH 04/45] staging/lustre/llite: Get rid of /proc references in comments

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/llite/lproc_llite.c | 2 +-
 drivers/staging/lustre/lustre/llite/vvp_io.c      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c
index f134ad9..8d3c788 100644
--- a/drivers/staging/lustre/lustre/llite/lproc_llite.c
+++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c
@@ -43,7 +43,7 @@
 #include "llite_internal.h"
 #include "vvp_internal.h"
 
-/* /proc/lustre/llite mount point registration */
+/* debugfs llite mount point registration */
 static struct file_operations ll_rw_extents_stats_fops;
 static struct file_operations ll_rw_extents_stats_pp_fops;
 static struct file_operations ll_rw_offset_stats_fops;
diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c
index 0920ac6..573ab15 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_io.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_io.c
@@ -1003,7 +1003,7 @@ static int vvp_io_commit_write(const struct lu_env *env,
 	 *
 	 *     (3) IO is batched up to the RPC size and is async until the
 	 *     client max cache is hit
-	 *     (/proc/fs/lustre/osc/OSC.../max_dirty_mb)
+	 *     (/sys/fs/lustre/osc/OSC.../max_dirty_mb)
 	 *
 	 */
 	if (!PageDirty(vmpage)) {
-- 
2.1.0

[lustre-devel] [PATCH 04/45] staging/lustre/llite: Get rid of /proc references in comments

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/llite/lproc_llite.c | 2 +-
 drivers/staging/lustre/lustre/llite/vvp_io.c      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c
index f134ad9..8d3c788 100644
--- a/drivers/staging/lustre/lustre/llite/lproc_llite.c
+++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c
@@ -43,7 +43,7 @@
 #include "llite_internal.h"
 #include "vvp_internal.h"
 
-/* /proc/lustre/llite mount point registration */
+/* debugfs llite mount point registration */
 static struct file_operations ll_rw_extents_stats_fops;
 static struct file_operations ll_rw_extents_stats_pp_fops;
 static struct file_operations ll_rw_offset_stats_fops;
diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c
index 0920ac6..573ab15 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_io.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_io.c
@@ -1003,7 +1003,7 @@ static int vvp_io_commit_write(const struct lu_env *env,
 	 *
 	 *     (3) IO is batched up to the RPC size and is async until the
 	 *     client max cache is hit
-	 *     (/proc/fs/lustre/osc/OSC.../max_dirty_mb)
+	 *     (/sys/fs/lustre/osc/OSC.../max_dirty_mb)
 	 *
 	 */
 	if (!PageDirty(vmpage)) {
-- 
2.1.0

[PATCH 05/45] staging/lustre/lov: Get rid of /proc references in comments

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lov/lov_pool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lov/lov_pool.c b/drivers/staging/lustre/lustre/lov/lov_pool.c
index 3ee1d40..470708c 100644
--- a/drivers/staging/lustre/lustre/lov/lov_pool.c
+++ b/drivers/staging/lustre/lustre/lov/lov_pool.c
@@ -154,7 +154,7 @@ struct cfs_hash_ops pool_hash_operations = {
 
 /* ifdef needed for liblustre support */
 /*
- * pool /proc seq_file methods
+ * pool debugfs seq_file methods
  */
 /*
  * iterator is used to go through the target pool entries
@@ -429,7 +429,7 @@ int lov_pool_new(struct obd_device *obd, char *poolname)
 	INIT_HLIST_NODE(&new_pool->pool_hash);
 
 	/* we need this assert seq_file is not implemented for liblustre */
-	/* get ref for /proc file */
+	/* get ref for debugfs file */
 	lov_pool_getref(new_pool);
 	new_pool->pool_debugfs_entry = ldebugfs_add_simple(
 						lov->lov_pool_debugfs_entry,
-- 
2.1.0

[lustre-devel] [PATCH 05/45] staging/lustre/lov: Get rid of /proc references in comments

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Now that the sysfs conversion is complete, also convert all the
remaining comments

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lov/lov_pool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lov/lov_pool.c b/drivers/staging/lustre/lustre/lov/lov_pool.c
index 3ee1d40..470708c 100644
--- a/drivers/staging/lustre/lustre/lov/lov_pool.c
+++ b/drivers/staging/lustre/lustre/lov/lov_pool.c
@@ -154,7 +154,7 @@ struct cfs_hash_ops pool_hash_operations = {
 
 /* ifdef needed for liblustre support */
 /*
- * pool /proc seq_file methods
+ * pool debugfs seq_file methods
  */
 /*
  * iterator is used to go through the target pool entries
@@ -429,7 +429,7 @@ int lov_pool_new(struct obd_device *obd, char *poolname)
 	INIT_HLIST_NODE(&new_pool->pool_hash);
 
 	/* we need this assert seq_file is not implemented for liblustre */
-	/* get ref for /proc file */
+	/* get ref for debugfs file */
 	lov_pool_getref(new_pool);
 	new_pool->pool_debugfs_entry = ldebugfs_add_simple(
 						lov->lov_pool_debugfs_entry,
-- 
2.1.0

[PATCH 06/45] staging/lustre: Remove unused function oti_init

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All the users seems to have disappeared.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/obd.h | 28 ----------------------------
 1 file changed, 28 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index 514e12b..991d2c6 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -595,34 +595,6 @@ struct obd_trans_info {
 	struct obd_uuid	 *oti_ost_uuid;
 };
 
-static inline void oti_init(struct obd_trans_info *oti,
-			    struct ptlrpc_request *req)
-{
-	if (oti == NULL)
-		return;
-	memset(oti, 0, sizeof(*oti));
-
-	if (req == NULL)
-		return;
-
-	oti->oti_xid = req->rq_xid;
-	/** VBR: take versions from request */
-	if (req->rq_reqmsg != NULL &&
-	    lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
-		__u64 *pre_version = lustre_msg_get_versions(req->rq_reqmsg);
-
-		oti->oti_pre_version = pre_version ? pre_version[0] : 0;
-		oti->oti_transno = lustre_msg_get_transno(req->rq_reqmsg);
-	}
-
-	/** called from mds_create_objects */
-	if (req->rq_repmsg != NULL)
-		oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
-	oti->oti_thread = req->rq_svc_thread;
-	if (req->rq_reqmsg != NULL)
-		oti->oti_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
-}
-
 static inline void oti_alloc_cookies(struct obd_trans_info *oti,
 				     int num_cookies)
 {
-- 
2.1.0

[lustre-devel] [PATCH 06/45] staging/lustre: Remove unused function oti_init

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All the users seems to have disappeared.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/obd.h | 28 ----------------------------
 1 file changed, 28 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index 514e12b..991d2c6 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -595,34 +595,6 @@ struct obd_trans_info {
 	struct obd_uuid	 *oti_ost_uuid;
 };
 
-static inline void oti_init(struct obd_trans_info *oti,
-			    struct ptlrpc_request *req)
-{
-	if (oti == NULL)
-		return;
-	memset(oti, 0, sizeof(*oti));
-
-	if (req == NULL)
-		return;
-
-	oti->oti_xid = req->rq_xid;
-	/** VBR: take versions from request */
-	if (req->rq_reqmsg != NULL &&
-	    lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
-		__u64 *pre_version = lustre_msg_get_versions(req->rq_reqmsg);
-
-		oti->oti_pre_version = pre_version ? pre_version[0] : 0;
-		oti->oti_transno = lustre_msg_get_transno(req->rq_reqmsg);
-	}
-
-	/** called from mds_create_objects */
-	if (req->rq_repmsg != NULL)
-		oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
-	oti->oti_thread = req->rq_svc_thread;
-	if (req->rq_reqmsg != NULL)
-		oti->oti_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
-}
-
 static inline void oti_alloc_cookies(struct obd_trans_info *oti,
 				     int num_cookies)
 {
-- 
2.1.0

[PATCH 07/45] staging/lustre: Remove unused osc_on_mdt function

[green]

From: Oleg Drokin <green@linuxhacker.ru>

This only makes sense on metadata server, so get rid of it.

Also remove now unused MDS_OSC_MAX_RIF_DEFAULT define

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/obd.h   |  1 -
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c | 28 +--------------------------
 2 files changed, 1 insertion(+), 28 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index 991d2c6..c64a499 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -216,7 +216,6 @@ struct timeout_item {
 };
 
 #define OSC_MAX_RIF_DEFAULT       8
-#define MDS_OSC_MAX_RIF_DEFAULT   50
 #define OSC_MAX_RIF_MAX	 256
 #define OSC_MAX_DIRTY_DEFAULT  (OSC_MAX_RIF_DEFAULT * 4)
 #define OSC_MAX_DIRTY_MB_MAX   2048     /* arbitrary, but < MAX_LONG bytes */
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index 3c8d441..b52ffc0 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -227,29 +227,6 @@ void client_destroy_import(struct obd_import *imp)
 }
 EXPORT_SYMBOL(client_destroy_import);
 
-/**
- * Check whether or not the OSC is on MDT.
- * In the config log,
- * osc on MDT
- *	setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
- * osc on client
- *	setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
- *
- **/
-static int osc_on_mdt(char *obdname)
-{
-	char *ptr;
-
-	ptr = strrchr(obdname, '-');
-	if (ptr == NULL)
-		return 0;
-
-	if (strncmp(ptr + 1, "MDT", 3) == 0)
-		return 1;
-
-	return 0;
-}
-
 /* Configure an RPC client OBD device.
  *
  * lcfg parameters:
@@ -400,10 +377,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 	} else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
 		cli->cl_max_rpcs_in_flight = 4;
 	} else {
-		if (osc_on_mdt(obddev->obd_name))
-			cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
-		else
-			cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
+		cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
 	}
 	rc = ldlm_get_ref();
 	if (rc) {
-- 
2.1.0

[lustre-devel] [PATCH 07/45] staging/lustre: Remove unused osc_on_mdt function

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

This only makes sense on metadata server, so get rid of it.

Also remove now unused MDS_OSC_MAX_RIF_DEFAULT define

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/obd.h   |  1 -
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c | 28 +--------------------------
 2 files changed, 1 insertion(+), 28 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index 991d2c6..c64a499 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -216,7 +216,6 @@ struct timeout_item {
 };
 
 #define OSC_MAX_RIF_DEFAULT       8
-#define MDS_OSC_MAX_RIF_DEFAULT   50
 #define OSC_MAX_RIF_MAX	 256
 #define OSC_MAX_DIRTY_DEFAULT  (OSC_MAX_RIF_DEFAULT * 4)
 #define OSC_MAX_DIRTY_MB_MAX   2048     /* arbitrary, but < MAX_LONG bytes */
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index 3c8d441..b52ffc0 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -227,29 +227,6 @@ void client_destroy_import(struct obd_import *imp)
 }
 EXPORT_SYMBOL(client_destroy_import);
 
-/**
- * Check whether or not the OSC is on MDT.
- * In the config log,
- * osc on MDT
- *	setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
- * osc on client
- *	setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
- *
- **/
-static int osc_on_mdt(char *obdname)
-{
-	char *ptr;
-
-	ptr = strrchr(obdname, '-');
-	if (ptr == NULL)
-		return 0;
-
-	if (strncmp(ptr + 1, "MDT", 3) == 0)
-		return 1;
-
-	return 0;
-}
-
 /* Configure an RPC client OBD device.
  *
  * lcfg parameters:
@@ -400,10 +377,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 	} else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
 		cli->cl_max_rpcs_in_flight = 4;
 	} else {
-		if (osc_on_mdt(obddev->obd_name))
-			cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
-		else
-			cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
+		cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
 	}
 	rc = ldlm_get_ref();
 	if (rc) {
-- 
2.1.0

[PATCH 08/45] staging/lustre: Remove server code from client_obd_setup()

[green]

From: Oleg Drokin <green@linuxhacker.ru>

In client_obd_setup references to LUSTRE_OSP_NAME could only
happen on metadata servers, so remove them as never true

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index b52ffc0..774d89c 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -261,22 +261,6 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 		cli->cl_sp_me = LUSTRE_SP_CLI;
 		cli->cl_sp_to = LUSTRE_SP_MDT;
 		ns_type = LDLM_NS_TYPE_MDC;
-	} else if (!strcmp(name, LUSTRE_OSP_NAME)) {
-		if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
-			/* OSP_on_MDT for other MDTs */
-			connect_op = MDS_CONNECT;
-			cli->cl_sp_to = LUSTRE_SP_MDT;
-			ns_type = LDLM_NS_TYPE_MDC;
-			rq_portal = OUT_PORTAL;
-		} else {
-			/* OSP on MDT for OST */
-			connect_op = OST_CONNECT;
-			cli->cl_sp_to = LUSTRE_SP_OST;
-			ns_type = LDLM_NS_TYPE_OSC;
-			rq_portal = OST_REQUEST_PORTAL;
-		}
-		rp_portal = OSC_REPLY_PORTAL;
-		cli->cl_sp_me = LUSTRE_SP_CLI;
 	} else if (!strcmp(name, LUSTRE_MGC_NAME)) {
 		rq_portal = MGS_REQUEST_PORTAL;
 		rp_portal = MGC_REPLY_PORTAL;
-- 
2.1.0

[lustre-devel] [PATCH 08/45] staging/lustre: Remove server code from client_obd_setup()

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

In client_obd_setup references to LUSTRE_OSP_NAME could only
happen on metadata servers, so remove them as never true

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index b52ffc0..774d89c 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -261,22 +261,6 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 		cli->cl_sp_me = LUSTRE_SP_CLI;
 		cli->cl_sp_to = LUSTRE_SP_MDT;
 		ns_type = LDLM_NS_TYPE_MDC;
-	} else if (!strcmp(name, LUSTRE_OSP_NAME)) {
-		if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
-			/* OSP_on_MDT for other MDTs */
-			connect_op = MDS_CONNECT;
-			cli->cl_sp_to = LUSTRE_SP_MDT;
-			ns_type = LDLM_NS_TYPE_MDC;
-			rq_portal = OUT_PORTAL;
-		} else {
-			/* OSP on MDT for OST */
-			connect_op = OST_CONNECT;
-			cli->cl_sp_to = LUSTRE_SP_OST;
-			ns_type = LDLM_NS_TYPE_OSC;
-			rq_portal = OST_REQUEST_PORTAL;
-		}
-		rp_portal = OSC_REPLY_PORTAL;
-		cli->cl_sp_me = LUSTRE_SP_CLI;
 	} else if (!strcmp(name, LUSTRE_MGC_NAME)) {
 		rq_portal = MGS_REQUEST_PORTAL;
 		rp_portal = MGC_REPLY_PORTAL;
-- 
2.1.0

[PATCH 09/45] staging/lustre: Remove server code from class_get_type()

[green]

From: Oleg Drokin <green@linuxhacker.ru>

class_get_type has some references to various server modules
that could not exist on the server, so get rid of them.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/obdclass/genops.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/genops.c b/drivers/staging/lustre/lustre/obdclass/genops.c
index 5665655..1cb68df 100644
--- a/drivers/staging/lustre/lustre/obdclass/genops.c
+++ b/drivers/staging/lustre/lustre/obdclass/genops.c
@@ -113,15 +113,6 @@ static struct obd_type *class_get_type(const char *name)
 	if (!type) {
 		const char *modname = name;
 
-		if (strcmp(modname, "obdfilter") == 0)
-			modname = "ofd";
-
-		if (strcmp(modname, LUSTRE_LWP_NAME) == 0)
-			modname = LUSTRE_OSP_NAME;
-
-		if (!strncmp(modname, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME)))
-			modname = LUSTRE_MDT_NAME;
-
 		if (!request_module("%s", modname)) {
 			CDEBUG(D_INFO, "Loaded module '%s'\n", modname);
 			type = class_search_type(name);
-- 
2.1.0

[lustre-devel] [PATCH 09/45] staging/lustre: Remove server code from class_get_type()

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

class_get_type has some references to various server modules
that could not exist on the server, so get rid of them.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/obdclass/genops.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/genops.c b/drivers/staging/lustre/lustre/obdclass/genops.c
index 5665655..1cb68df 100644
--- a/drivers/staging/lustre/lustre/obdclass/genops.c
+++ b/drivers/staging/lustre/lustre/obdclass/genops.c
@@ -113,15 +113,6 @@ static struct obd_type *class_get_type(const char *name)
 	if (!type) {
 		const char *modname = name;
 
-		if (strcmp(modname, "obdfilter") == 0)
-			modname = "ofd";
-
-		if (strcmp(modname, LUSTRE_LWP_NAME) == 0)
-			modname = LUSTRE_OSP_NAME;
-
-		if (!strncmp(modname, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME)))
-			modname = LUSTRE_MDT_NAME;
-
 		if (!request_module("%s", modname)) {
 			CDEBUG(D_INFO, "Loaded module '%s'\n", modname);
 			type = class_search_type(name);
-- 
2.1.0

[PATCH 10/45] staging/lustre: Remove commented out lock_lock_multi_match

[green]

From: Oleg Drokin <green@linuxhacker.ru>

lock_lock_multi_match stayed commented out unused for ages now,
so let's just remove it.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lov/lov_lock.c | 39 ----------------------------
 1 file changed, 39 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lov/lov_lock.c b/drivers/staging/lustre/lustre/lov/lov_lock.c
index d866791..36615da 100644
--- a/drivers/staging/lustre/lustre/lov/lov_lock.c
+++ b/drivers/staging/lustre/lustre/lov/lov_lock.c
@@ -852,45 +852,6 @@ static int lov_lock_use(const struct lu_env *env,
 	return result;
 }
 
-#if 0
-static int lock_lock_multi_match()
-{
-	struct cl_lock	  *lock    = slice->cls_lock;
-	struct cl_lock_descr    *subneed = &lov_env_info(env)->lti_ldescr;
-	struct lov_object       *loo     = cl2lov(lov->lls_cl.cls_obj);
-	struct lov_layout_raid0 *r0      = lov_r0(loo);
-	struct lov_lock_sub     *sub;
-	struct cl_object	*subobj;
-	u64  fstart;
-	u64  fend;
-	u64  start;
-	u64  end;
-	int i;
-
-	fstart = cl_offset(need->cld_obj, need->cld_start);
-	fend   = cl_offset(need->cld_obj, need->cld_end + 1) - 1;
-	subneed->cld_mode = need->cld_mode;
-	cl_lock_mutex_get(env, lock);
-	for (i = 0; i < lov->lls_nr; ++i) {
-		sub = &lov->lls_sub[i];
-		if (sub->sub_lock == NULL)
-			continue;
-		subobj = sub->sub_descr.cld_obj;
-		if (!lov_stripe_intersects(loo->lo_lsm, sub->sub_stripe,
-					   fstart, fend, &start, &end))
-			continue;
-		subneed->cld_start = cl_index(subobj, start);
-		subneed->cld_end   = cl_index(subobj, end);
-		subneed->cld_obj   = subobj;
-		if (!cl_lock_ext_match(&sub->sub_got, subneed)) {
-			result = 0;
-			break;
-		}
-	}
-	cl_lock_mutex_put(env, lock);
-}
-#endif
-
 /**
  * Check if the extent region \a descr is covered by \a child against the
  * specific \a stripe.
-- 
2.1.0

[lustre-devel] [PATCH 10/45] staging/lustre: Remove commented out lock_lock_multi_match

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

lock_lock_multi_match stayed commented out unused for ages now,
so let's just remove it.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lov/lov_lock.c | 39 ----------------------------
 1 file changed, 39 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lov/lov_lock.c b/drivers/staging/lustre/lustre/lov/lov_lock.c
index d866791..36615da 100644
--- a/drivers/staging/lustre/lustre/lov/lov_lock.c
+++ b/drivers/staging/lustre/lustre/lov/lov_lock.c
@@ -852,45 +852,6 @@ static int lov_lock_use(const struct lu_env *env,
 	return result;
 }
 
-#if 0
-static int lock_lock_multi_match()
-{
-	struct cl_lock	  *lock    = slice->cls_lock;
-	struct cl_lock_descr    *subneed = &lov_env_info(env)->lti_ldescr;
-	struct lov_object       *loo     = cl2lov(lov->lls_cl.cls_obj);
-	struct lov_layout_raid0 *r0      = lov_r0(loo);
-	struct lov_lock_sub     *sub;
-	struct cl_object	*subobj;
-	u64  fstart;
-	u64  fend;
-	u64  start;
-	u64  end;
-	int i;
-
-	fstart = cl_offset(need->cld_obj, need->cld_start);
-	fend   = cl_offset(need->cld_obj, need->cld_end + 1) - 1;
-	subneed->cld_mode = need->cld_mode;
-	cl_lock_mutex_get(env, lock);
-	for (i = 0; i < lov->lls_nr; ++i) {
-		sub = &lov->lls_sub[i];
-		if (sub->sub_lock == NULL)
-			continue;
-		subobj = sub->sub_descr.cld_obj;
-		if (!lov_stripe_intersects(loo->lo_lsm, sub->sub_stripe,
-					   fstart, fend, &start, &end))
-			continue;
-		subneed->cld_start = cl_index(subobj, start);
-		subneed->cld_end   = cl_index(subobj, end);
-		subneed->cld_obj   = subobj;
-		if (!cl_lock_ext_match(&sub->sub_got, subneed)) {
-			result = 0;
-			break;
-		}
-	}
-	cl_lock_mutex_put(env, lock);
-}
-#endif
-
 /**
  * Check if the extent region \a descr is covered by \a child against the
  * specific \a stripe.
-- 
2.1.0

[PATCH 11/45] staging/lustre/osc: Remove commented out osc_page_protected()

[green]

From: Oleg Drokin <green@linuxhacker.ru>

The complicated version of osc_page_protected and osc_page_is_dlocked
are unsafe and were commented out for ages, so probably no point in
carrying them on.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/osc/osc_page.c | 99 ----------------------------
 1 file changed, 99 deletions(-)

diff --git a/drivers/staging/lustre/lustre/osc/osc_page.c b/drivers/staging/lustre/lustre/osc/osc_page.c
index 8943f0a..99d5b56 100644
--- a/drivers/staging/lustre/lustre/osc/osc_page.c
+++ b/drivers/staging/lustre/lustre/osc/osc_page.c
@@ -51,111 +51,12 @@ static int osc_lru_reserve(const struct lu_env *env, struct osc_object *obj,
  *  @{
  */
 
-/*
- * Comment out osc_page_protected because it may sleep inside the
- * the client_obd_list_lock.
- * client_obd_list_lock -> osc_ap_completion -> osc_completion ->
- *   -> osc_page_protected -> osc_page_is_dlocked -> osc_match_base
- *   -> ldlm_lock_match -> sptlrpc_import_check_ctx -> sleep.
- */
-#if 0
-static int osc_page_is_dlocked(const struct lu_env *env,
-			       const struct osc_page *opg,
-			       enum cl_lock_mode mode, int pending, int unref)
-{
-	struct cl_page	 *page;
-	struct osc_object      *obj;
-	struct osc_thread_info *info;
-	struct ldlm_res_id     *resname;
-	struct lustre_handle   *lockh;
-	ldlm_policy_data_t     *policy;
-	ldlm_mode_t	     dlmmode;
-	__u64                   flags;
-
-	might_sleep();
-
-	info = osc_env_info(env);
-	resname = &info->oti_resname;
-	policy = &info->oti_policy;
-	lockh = &info->oti_handle;
-	page = opg->ops_cl.cpl_page;
-	obj = cl2osc(opg->ops_cl.cpl_obj);
-
-	flags = LDLM_FL_TEST_LOCK | LDLM_FL_BLOCK_GRANTED;
-	if (pending)
-		flags |= LDLM_FL_CBPENDING;
-
-	dlmmode = osc_cl_lock2ldlm(mode) | LCK_PW;
-	osc_lock_build_res(env, obj, resname);
-	osc_index2policy(policy, page->cp_obj, page->cp_index, page->cp_index);
-	return osc_match_base(osc_export(obj), resname, LDLM_EXTENT, policy,
-			      dlmmode, &flags, NULL, lockh, unref);
-}
-
-/**
- * Checks an invariant that a page in the cache is covered by a lock, as
- * needed.
- */
-static int osc_page_protected(const struct lu_env *env,
-			      const struct osc_page *opg,
-			      enum cl_lock_mode mode, int unref)
-{
-	struct cl_object_header *hdr;
-	struct cl_lock	  *scan;
-	struct cl_page	  *page;
-	struct cl_lock_descr    *descr;
-	int result;
-
-	LINVRNT(!opg->ops_temp);
-
-	page = opg->ops_cl.cpl_page;
-	if (page->cp_owner != NULL &&
-	    cl_io_top(page->cp_owner)->ci_lockreq == CILR_NEVER)
-		/*
-		 * If IO is done without locks (liblustre, or lloop), lock is
-		 * not required.
-		 */
-		result = 1;
-	else
-		/* otherwise check for a DLM lock */
-	result = osc_page_is_dlocked(env, opg, mode, 1, unref);
-	if (result == 0) {
-		/* maybe this page is a part of a lockless io? */
-		hdr = cl_object_header(opg->ops_cl.cpl_obj);
-		descr = &osc_env_info(env)->oti_descr;
-		descr->cld_mode = mode;
-		descr->cld_start = page->cp_index;
-		descr->cld_end   = page->cp_index;
-		spin_lock(&hdr->coh_lock_guard);
-		list_for_each_entry(scan, &hdr->coh_locks, cll_linkage) {
-			/*
-			 * Lock-less sub-lock has to be either in HELD state
-			 * (when io is actively going on), or in CACHED state,
-			 * when top-lock is being unlocked:
-			 * cl_io_unlock()->cl_unuse()->...->lov_lock_unuse().
-			 */
-			if ((scan->cll_state == CLS_HELD ||
-			     scan->cll_state == CLS_CACHED) &&
-			    cl_lock_ext_match(&scan->cll_descr, descr)) {
-				struct osc_lock *olck;
-
-				olck = osc_lock_at(scan);
-				result = osc_lock_is_lockless(olck);
-				break;
-			}
-		}
-		spin_unlock(&hdr->coh_lock_guard);
-	}
-	return result;
-}
-#else
 static int osc_page_protected(const struct lu_env *env,
 			      const struct osc_page *opg,
 			      enum cl_lock_mode mode, int unref)
 {
 	return 1;
 }
-#endif
 
 /*****************************************************************************
  *
-- 
2.1.0

[lustre-devel] [PATCH 11/45] staging/lustre/osc: Remove commented out osc_page_protected()

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

The complicated version of osc_page_protected and osc_page_is_dlocked
are unsafe and were commented out for ages, so probably no point in
carrying them on.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/osc/osc_page.c | 99 ----------------------------
 1 file changed, 99 deletions(-)

diff --git a/drivers/staging/lustre/lustre/osc/osc_page.c b/drivers/staging/lustre/lustre/osc/osc_page.c
index 8943f0a..99d5b56 100644
--- a/drivers/staging/lustre/lustre/osc/osc_page.c
+++ b/drivers/staging/lustre/lustre/osc/osc_page.c
@@ -51,111 +51,12 @@ static int osc_lru_reserve(const struct lu_env *env, struct osc_object *obj,
  *  @{
  */
 
-/*
- * Comment out osc_page_protected because it may sleep inside the
- * the client_obd_list_lock.
- * client_obd_list_lock -> osc_ap_completion -> osc_completion ->
- *   -> osc_page_protected -> osc_page_is_dlocked -> osc_match_base
- *   -> ldlm_lock_match -> sptlrpc_import_check_ctx -> sleep.
- */
-#if 0
-static int osc_page_is_dlocked(const struct lu_env *env,
-			       const struct osc_page *opg,
-			       enum cl_lock_mode mode, int pending, int unref)
-{
-	struct cl_page	 *page;
-	struct osc_object      *obj;
-	struct osc_thread_info *info;
-	struct ldlm_res_id     *resname;
-	struct lustre_handle   *lockh;
-	ldlm_policy_data_t     *policy;
-	ldlm_mode_t	     dlmmode;
-	__u64                   flags;
-
-	might_sleep();
-
-	info = osc_env_info(env);
-	resname = &info->oti_resname;
-	policy = &info->oti_policy;
-	lockh = &info->oti_handle;
-	page = opg->ops_cl.cpl_page;
-	obj = cl2osc(opg->ops_cl.cpl_obj);
-
-	flags = LDLM_FL_TEST_LOCK | LDLM_FL_BLOCK_GRANTED;
-	if (pending)
-		flags |= LDLM_FL_CBPENDING;
-
-	dlmmode = osc_cl_lock2ldlm(mode) | LCK_PW;
-	osc_lock_build_res(env, obj, resname);
-	osc_index2policy(policy, page->cp_obj, page->cp_index, page->cp_index);
-	return osc_match_base(osc_export(obj), resname, LDLM_EXTENT, policy,
-			      dlmmode, &flags, NULL, lockh, unref);
-}
-
-/**
- * Checks an invariant that a page in the cache is covered by a lock, as
- * needed.
- */
-static int osc_page_protected(const struct lu_env *env,
-			      const struct osc_page *opg,
-			      enum cl_lock_mode mode, int unref)
-{
-	struct cl_object_header *hdr;
-	struct cl_lock	  *scan;
-	struct cl_page	  *page;
-	struct cl_lock_descr    *descr;
-	int result;
-
-	LINVRNT(!opg->ops_temp);
-
-	page = opg->ops_cl.cpl_page;
-	if (page->cp_owner != NULL &&
-	    cl_io_top(page->cp_owner)->ci_lockreq == CILR_NEVER)
-		/*
-		 * If IO is done without locks (liblustre, or lloop), lock is
-		 * not required.
-		 */
-		result = 1;
-	else
-		/* otherwise check for a DLM lock */
-	result = osc_page_is_dlocked(env, opg, mode, 1, unref);
-	if (result == 0) {
-		/* maybe this page is a part of a lockless io? */
-		hdr = cl_object_header(opg->ops_cl.cpl_obj);
-		descr = &osc_env_info(env)->oti_descr;
-		descr->cld_mode = mode;
-		descr->cld_start = page->cp_index;
-		descr->cld_end   = page->cp_index;
-		spin_lock(&hdr->coh_lock_guard);
-		list_for_each_entry(scan, &hdr->coh_locks, cll_linkage) {
-			/*
-			 * Lock-less sub-lock has to be either in HELD state
-			 * (when io is actively going on), or in CACHED state,
-			 * when top-lock is being unlocked:
-			 * cl_io_unlock()->cl_unuse()->...->lov_lock_unuse().
-			 */
-			if ((scan->cll_state == CLS_HELD ||
-			     scan->cll_state == CLS_CACHED) &&
-			    cl_lock_ext_match(&scan->cll_descr, descr)) {
-				struct osc_lock *olck;
-
-				olck = osc_lock_at(scan);
-				result = osc_lock_is_lockless(olck);
-				break;
-			}
-		}
-		spin_unlock(&hdr->coh_lock_guard);
-	}
-	return result;
-}
-#else
 static int osc_page_protected(const struct lu_env *env,
 			      const struct osc_page *opg,
 			      enum cl_lock_mode mode, int unref)
 {
 	return 1;
 }
-#endif
 
 /*****************************************************************************
  *
-- 
2.1.0

[PATCH 12/45] staging/lustre/libcfs: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"
Also removed some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c       |   4 +-
 drivers/staging/lustre/lustre/libcfs/hash.c        | 104 ++++++++++-----------
 drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c  |   6 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c |   2 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c  |   2 +-
 .../staging/lustre/lustre/libcfs/libcfs_string.c   |  15 ++-
 .../staging/lustre/lustre/libcfs/linux/linux-cpu.c |  58 ++++++------
 .../lustre/lustre/libcfs/linux/linux-crypto.c      |  18 ++--
 .../lustre/lustre/libcfs/linux/linux-debug.c       |   4 +-
 .../lustre/lustre/libcfs/linux/linux-module.c      |   6 +-
 .../lustre/lustre/libcfs/linux/linux-tracefile.c   |   6 +-
 drivers/staging/lustre/lustre/libcfs/module.c      |  15 ++-
 drivers/staging/lustre/lustre/libcfs/tracefile.c   |  40 ++++----
 drivers/staging/lustre/lustre/libcfs/tracefile.h   |  12 +--
 drivers/staging/lustre/lustre/libcfs/workitem.c    |   8 +-
 15 files changed, 143 insertions(+), 157 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 6274558..589b548 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -378,7 +378,7 @@ libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys)
 				continue;
 
 			token = fn(i);
-			if (token == NULL)	      /* unused bit */
+			if (!token)	      /* unused bit */
 				continue;
 
 			if (len > 0) {		  /* separator? */
@@ -505,7 +505,7 @@ int libcfs_debug_init(unsigned long bufsize)
 		libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
 	}
 
-	if (libcfs_debug_file_path != NULL) {
+	if (libcfs_debug_file_path) {
 		strlcpy(libcfs_debug_file_path_arr,
 			libcfs_debug_file_path,
 			sizeof(libcfs_debug_file_path_arr));
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index 4d50510..ad831fa 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -355,7 +355,7 @@ cfs_hash_dh_hnode_add(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dh_hhead(hs, bd),
 			  struct cfs_hash_dhead, dh_head);
-	if (dh->dh_tail != NULL) /* not empty */
+	if (dh->dh_tail) /* not empty */
 		hlist_add_behind(hnode, dh->dh_tail);
 	else /* empty list */
 		hlist_add_head(hnode, &dh->dh_head);
@@ -371,7 +371,7 @@ cfs_hash_dh_hnode_del(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dh_hhead(hs, bd),
 			  struct cfs_hash_dhead, dh_head);
-	if (hnd->next == NULL) { /* it's the tail */
+	if (!hnd->next) { /* it's the tail */
 		dh->dh_tail = (hnd->pprev == &dh->dh_head.first) ? NULL :
 			      container_of(hnd->pprev, struct hlist_node, next);
 	}
@@ -412,7 +412,7 @@ cfs_hash_dd_hnode_add(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dd_hhead(hs, bd),
 			  struct cfs_hash_dhead_dep, dd_head);
-	if (dh->dd_tail != NULL) /* not empty */
+	if (dh->dd_tail) /* not empty */
 		hlist_add_behind(hnode, dh->dd_tail);
 	else /* empty list */
 		hlist_add_head(hnode, &dh->dd_head);
@@ -428,7 +428,7 @@ cfs_hash_dd_hnode_del(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dd_hhead(hs, bd),
 			  struct cfs_hash_dhead_dep, dd_head);
-	if (hnd->next == NULL) { /* it's the tail */
+	if (!hnd->next) { /* it's the tail */
 		dh->dd_tail = (hnd->pprev == &dh->dd_head.first) ? NULL :
 			      container_of(hnd->pprev, struct hlist_node, next);
 	}
@@ -492,7 +492,7 @@ void
 cfs_hash_bd_get(struct cfs_hash *hs, const void *key, struct cfs_hash_bd *bd)
 {
 	/* NB: caller should hold hs->hs_rwlock if REHASH is set */
-	if (likely(hs->hs_rehash_buckets == NULL)) {
+	if (likely(!hs->hs_rehash_buckets)) {
 		cfs_hash_bd_from_key(hs, hs->hs_buckets,
 				     hs->hs_cur_bits, key, bd);
 	} else {
@@ -641,7 +641,7 @@ cfs_hash_bd_lookup_intent(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 		if (!cfs_hash_keycmp(hs, key, ehnode))
 			continue;
 
-		if (match != NULL && match != ehnode) /* can't match */
+		if (match && match != ehnode) /* can't match */
 			continue;
 
 		/* match and ... */
@@ -659,7 +659,7 @@ cfs_hash_bd_lookup_intent(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 	if (!intent_add)
 		return NULL;
 
-	LASSERT(hnode != NULL);
+	LASSERT(hnode);
 	cfs_hash_bd_add_locked(hs, bd, hnode);
 	return hnode;
 }
@@ -698,8 +698,7 @@ cfs_hash_multi_bd_lock(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 		if (prev == bds[i].bd_bucket)
 			continue;
 
-		LASSERT(prev == NULL ||
-			prev->hsb_index < bds[i].bd_bucket->hsb_index);
+		LASSERT(!prev || prev->hsb_index < bds[i].bd_bucket->hsb_index);
 		cfs_hash_bd_lock(hs, &bds[i], excl);
 		prev = bds[i].bd_bucket;
 	}
@@ -730,7 +729,7 @@ cfs_hash_multi_bd_lookup_locked(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 	cfs_hash_for_each_bd(bds, n, i) {
 		ehnode = cfs_hash_bd_lookup_intent(hs, &bds[i], key, NULL,
 						   CFS_HS_LOOKUP_IT_FIND);
-		if (ehnode != NULL)
+		if (ehnode)
 			return ehnode;
 	}
 	return NULL;
@@ -745,13 +744,13 @@ cfs_hash_multi_bd_findadd_locked(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 	int intent;
 	unsigned i;
 
-	LASSERT(hnode != NULL);
+	LASSERT(hnode);
 	intent = (!noref * CFS_HS_LOOKUP_MASK_REF) | CFS_HS_LOOKUP_IT_PEEK;
 
 	cfs_hash_for_each_bd(bds, n, i) {
 		ehnode = cfs_hash_bd_lookup_intent(hs, &bds[i], key,
 						   NULL, intent);
-		if (ehnode != NULL)
+		if (ehnode)
 			return ehnode;
 	}
 
@@ -778,7 +777,7 @@ cfs_hash_multi_bd_finddel_locked(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 	cfs_hash_for_each_bd(bds, n, i) {
 		ehnode = cfs_hash_bd_lookup_intent(hs, &bds[i], key, hnode,
 						   CFS_HS_LOOKUP_IT_FINDDEL);
-		if (ehnode != NULL)
+		if (ehnode)
 			return ehnode;
 	}
 	return NULL;
@@ -789,10 +788,10 @@ cfs_hash_bd_order(struct cfs_hash_bd *bd1, struct cfs_hash_bd *bd2)
 {
 	int rc;
 
-	if (bd2->bd_bucket == NULL)
+	if (!bd2->bd_bucket)
 		return;
 
-	if (bd1->bd_bucket == NULL) {
+	if (!bd1->bd_bucket) {
 		*bd1 = *bd2;
 		bd2->bd_bucket = NULL;
 		return;
@@ -818,7 +817,7 @@ cfs_hash_dual_bd_get(struct cfs_hash *hs, const void *key,
 	/* NB: caller should hold hs_lock.rw if REHASH is set */
 	cfs_hash_bd_from_key(hs, hs->hs_buckets,
 			     hs->hs_cur_bits, key, &bds[0]);
-	if (likely(hs->hs_rehash_buckets == NULL)) {
+	if (likely(!hs->hs_rehash_buckets)) {
 		/* no rehash or not rehashing */
 		bds[1].bd_bucket = NULL;
 		return;
@@ -873,7 +872,7 @@ cfs_hash_buckets_free(struct cfs_hash_bucket **buckets,
 	int i;
 
 	for (i = prev_size; i < size; i++) {
-		if (buckets[i] != NULL)
+		if (buckets[i])
 			LIBCFS_FREE(buckets[i], bkt_size);
 	}
 
@@ -892,16 +891,16 @@ cfs_hash_buckets_realloc(struct cfs_hash *hs, struct cfs_hash_bucket **old_bkts,
 	struct cfs_hash_bucket **new_bkts;
 	int i;
 
-	LASSERT(old_size == 0 || old_bkts != NULL);
+	LASSERT(old_size == 0 || old_bkts);
 
-	if (old_bkts != NULL && old_size == new_size)
+	if (old_bkts && old_size == new_size)
 		return old_bkts;
 
 	LIBCFS_ALLOC(new_bkts, sizeof(new_bkts[0]) * new_size);
-	if (new_bkts == NULL)
+	if (!new_bkts)
 		return NULL;
 
-	if (old_bkts != NULL) {
+	if (old_bkts) {
 		memcpy(new_bkts, old_bkts,
 		       min(old_size, new_size) * sizeof(*old_bkts));
 	}
@@ -911,7 +910,7 @@ cfs_hash_buckets_realloc(struct cfs_hash *hs, struct cfs_hash_bucket **old_bkts,
 		struct cfs_hash_bd bd;
 
 		LIBCFS_ALLOC(new_bkts[i], cfs_hash_bkt_size(hs));
-		if (new_bkts[i] == NULL) {
+		if (!new_bkts[i]) {
 			cfs_hash_buckets_free(new_bkts, cfs_hash_bkt_size(hs),
 					      old_size, new_size);
 			return NULL;
@@ -1011,14 +1010,13 @@ cfs_hash_create(char *name, unsigned cur_bits, unsigned max_bits,
 
 	CLASSERT(CFS_HASH_THETA_BITS < 15);
 
-	LASSERT(name != NULL);
-	LASSERT(ops != NULL);
+	LASSERT(name);
 	LASSERT(ops->hs_key);
 	LASSERT(ops->hs_hash);
 	LASSERT(ops->hs_object);
 	LASSERT(ops->hs_keycmp);
-	LASSERT(ops->hs_get != NULL);
-	LASSERT(ops->hs_put_locked != NULL);
+	LASSERT(ops->hs_get);
+	LASSERT(ops->hs_put_locked);
 
 	if ((flags & CFS_HASH_REHASH) != 0)
 		flags |= CFS_HASH_COUNTER; /* must have counter */
@@ -1029,13 +1027,12 @@ cfs_hash_create(char *name, unsigned cur_bits, unsigned max_bits,
 	LASSERT(ergo((flags & CFS_HASH_REHASH) == 0, cur_bits == max_bits));
 	LASSERT(ergo((flags & CFS_HASH_REHASH) != 0,
 		     (flags & CFS_HASH_NO_LOCK) == 0));
-	LASSERT(ergo((flags & CFS_HASH_REHASH_KEY) != 0,
-		      ops->hs_keycpy != NULL));
+	LASSERT(ergo((flags & CFS_HASH_REHASH_KEY) != 0, ops->hs_keycpy));
 
 	len = (flags & CFS_HASH_BIGNAME) == 0 ?
 	      CFS_HASH_NAME_LEN : CFS_HASH_BIGNAME_LEN;
 	LIBCFS_ALLOC(hs, offsetof(struct cfs_hash, hs_name[len]));
-	if (hs == NULL)
+	if (!hs)
 		return NULL;
 
 	strlcpy(hs->hs_name, name, len);
@@ -1063,7 +1060,7 @@ cfs_hash_create(char *name, unsigned cur_bits, unsigned max_bits,
 
 	hs->hs_buckets = cfs_hash_buckets_realloc(hs, NULL, 0,
 						  CFS_HASH_NBKT(hs));
-	if (hs->hs_buckets != NULL)
+	if (hs->hs_buckets)
 		return hs;
 
 	LIBCFS_FREE(hs, offsetof(struct cfs_hash, hs_name[len]));
@@ -1082,7 +1079,7 @@ cfs_hash_destroy(struct cfs_hash *hs)
 	struct cfs_hash_bd bd;
 	int i;
 
-	LASSERT(hs != NULL);
+	LASSERT(hs);
 	LASSERT(!cfs_hash_is_exiting(hs) &&
 		!cfs_hash_is_iterating(hs));
 
@@ -1096,13 +1093,12 @@ cfs_hash_destroy(struct cfs_hash *hs)
 
 	cfs_hash_depth_wi_cancel(hs);
 	/* rehash should be done/canceled */
-	LASSERT(hs->hs_buckets != NULL &&
-		hs->hs_rehash_buckets == NULL);
+	LASSERT(hs->hs_buckets && !hs->hs_rehash_buckets);
 
 	cfs_hash_for_each_bucket(hs, &bd, i) {
 		struct hlist_head *hhead;
 
-		LASSERT(bd.bd_bucket != NULL);
+		LASSERT(bd.bd_bucket);
 		/* no need to take this lock, just for consistent code */
 		cfs_hash_bd_lock(hs, &bd, 1);
 
@@ -1293,8 +1289,8 @@ cfs_hash_del(struct cfs_hash *hs, const void *key, struct hlist_node *hnode)
 	cfs_hash_dual_bd_get_and_lock(hs, key, bds, 1);
 
 	/* NB: do nothing if @hnode is not in hash table */
-	if (hnode == NULL || !hlist_unhashed(hnode)) {
-		if (bds[1].bd_bucket == NULL && hnode != NULL) {
+	if (!hnode || !hlist_unhashed(hnode)) {
+		if (!bds[1].bd_bucket && hnode) {
 			cfs_hash_bd_del_locked(hs, &bds[0], hnode);
 		} else {
 			hnode = cfs_hash_dual_bd_finddel_locked(hs, bds,
@@ -1302,7 +1298,7 @@ cfs_hash_del(struct cfs_hash *hs, const void *key, struct hlist_node *hnode)
 		}
 	}
 
-	if (hnode != NULL) {
+	if (hnode) {
 		obj  = cfs_hash_object(hs, hnode);
 		bits = cfs_hash_rehash_bits(hs);
 	}
@@ -1348,7 +1344,7 @@ cfs_hash_lookup(struct cfs_hash *hs, const void *key)
 	cfs_hash_dual_bd_get_and_lock(hs, key, bds, 0);
 
 	hnode = cfs_hash_dual_bd_lookup_locked(hs, bds, key);
-	if (hnode != NULL)
+	if (hnode)
 		obj = cfs_hash_object(hs, hnode);
 
 	cfs_hash_dual_bd_unlock(hs, bds, 0);
@@ -1436,7 +1432,7 @@ cfs_hash_for_each_tight(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 		struct hlist_head *hhead;
 
 		cfs_hash_bd_lock(hs, &bd, excl);
-		if (func == NULL) { /* only glimpse size */
+		if (!func) { /* only glimpse size */
 			count += bd.bd_bucket->hsb_count;
 			cfs_hash_bd_unlock(hs, &bd, excl);
 			continue;
@@ -1574,7 +1570,7 @@ cfs_hash_for_each_relax(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 
 	stop_on_change = cfs_hash_with_rehash_key(hs) ||
 			 !cfs_hash_with_no_itemref(hs) ||
-			 hs->hs_ops->hs_put_locked == NULL;
+			 !hs->hs_ops->hs_put_locked;
 	cfs_hash_lock(hs, 0);
 	LASSERT(!cfs_hash_is_rehashing(hs));
 
@@ -1585,7 +1581,7 @@ cfs_hash_for_each_relax(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 		version = cfs_hash_bd_version_get(&bd);
 
 		cfs_hash_bd_for_each_hlist(hs, &bd, hhead) {
-			for (hnode = hhead->first; hnode != NULL;) {
+			for (hnode = hhead->first; hnode;) {
 				cfs_hash_bucket_validate(hs, &bd, hnode);
 				cfs_hash_get(hs, hnode);
 				cfs_hash_bd_unlock(hs, &bd, 0);
@@ -1634,9 +1630,8 @@ cfs_hash_for_each_nolock(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 	    !cfs_hash_with_no_itemref(hs))
 		return -EOPNOTSUPP;
 
-	if (hs->hs_ops->hs_get == NULL ||
-	    (hs->hs_ops->hs_put == NULL &&
-	     hs->hs_ops->hs_put_locked == NULL))
+	if (!hs->hs_ops->hs_get ||
+	    (!hs->hs_ops->hs_put && !hs->hs_ops->hs_put_locked))
 		return -EOPNOTSUPP;
 
 	cfs_hash_for_each_enter(hs);
@@ -1667,9 +1662,8 @@ cfs_hash_for_each_empty(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 	if (cfs_hash_with_no_lock(hs))
 		return -EOPNOTSUPP;
 
-	if (hs->hs_ops->hs_get == NULL ||
-	    (hs->hs_ops->hs_put == NULL &&
-	     hs->hs_ops->hs_put_locked == NULL))
+	if (!hs->hs_ops->hs_get ||
+	    (!hs->hs_ops->hs_put && !hs->hs_ops->hs_put_locked))
 		return -EOPNOTSUPP;
 
 	cfs_hash_for_each_enter(hs);
@@ -1837,7 +1831,7 @@ cfs_hash_rehash_bd(struct cfs_hash *hs, struct cfs_hash_bd *old)
 	cfs_hash_bd_for_each_hlist(hs, old, hhead) {
 		hlist_for_each_safe(hnode, pos, hhead) {
 			key = cfs_hash_key(hs, hnode);
-			LASSERT(key != NULL);
+			LASSERT(key);
 			/* Validate hnode is in the correct bucket. */
 			cfs_hash_bucket_validate(hs, old, hnode);
 			/*
@@ -1867,7 +1861,7 @@ cfs_hash_rehash_worker(cfs_workitem_t *wi)
 	int rc = 0;
 	int i;
 
-	LASSERT(hs != NULL && cfs_hash_with_rehash(hs));
+	LASSERT(hs && cfs_hash_with_rehash(hs));
 
 	cfs_hash_lock(hs, 0);
 	LASSERT(cfs_hash_is_rehashing(hs));
@@ -1884,7 +1878,7 @@ cfs_hash_rehash_worker(cfs_workitem_t *wi)
 	bkts = cfs_hash_buckets_realloc(hs, hs->hs_buckets,
 					old_size, new_size);
 	cfs_hash_lock(hs, 1);
-	if (bkts == NULL) {
+	if (!bkts) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1903,7 +1897,7 @@ cfs_hash_rehash_worker(cfs_workitem_t *wi)
 		goto out;
 	}
 
-	LASSERT(hs->hs_rehash_buckets == NULL);
+	LASSERT(!hs->hs_rehash_buckets);
 	hs->hs_rehash_buckets = bkts;
 
 	rc = 0;
@@ -1946,7 +1940,7 @@ out:
 	bsize = cfs_hash_bkt_size(hs);
 	cfs_hash_unlock(hs, 1);
 	/* can't refer to @hs anymore because it could be destroyed */
-	if (bkts != NULL)
+	if (bkts)
 		cfs_hash_buckets_free(bkts, bsize, new_size, old_size);
 	if (rc != 0)
 		CDEBUG(D_INFO, "early quit of rehashing: %d\n", rc);
@@ -1987,7 +1981,7 @@ void cfs_hash_rehash_key(struct cfs_hash *hs, const void *old_key,
 	cfs_hash_bd_order(&bds[0], &bds[1]);
 
 	cfs_hash_multi_bd_lock(hs, bds, 3, 1);
-	if (likely(old_bds[1].bd_bucket == NULL)) {
+	if (likely(!old_bds[1].bd_bucket)) {
 		cfs_hash_bd_move_locked(hs, &old_bds[0], &new_bd, hnode);
 	} else {
 		cfs_hash_dual_bd_finddel_locked(hs, old_bds, old_key, hnode);
@@ -2013,7 +2007,7 @@ static struct cfs_hash_bucket **
 cfs_hash_full_bkts(struct cfs_hash *hs)
 {
 	/* NB: caller should hold hs->hs_rwlock if REHASH is set */
-	if (hs->hs_rehash_buckets == NULL)
+	if (!hs->hs_rehash_buckets)
 		return hs->hs_buckets;
 
 	LASSERT(hs->hs_rehash_bits != 0);
@@ -2025,7 +2019,7 @@ static unsigned int
 cfs_hash_full_nbkt(struct cfs_hash *hs)
 {
 	/* NB: caller should hold hs->hs_rwlock if REHASH is set */
-	if (hs->hs_rehash_buckets == NULL)
+	if (!hs->hs_rehash_buckets)
 		return CFS_HASH_NBKT(hs);
 
 	LASSERT(hs->hs_rehash_bits != 0);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
index ba97c79..9137df9 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
@@ -56,7 +56,7 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 	}
 
 	LIBCFS_ALLOC(cptab, sizeof(*cptab));
-	if (cptab != NULL) {
+	if (cptab) {
 		cptab->ctb_version = CFS_CPU_VERSION_MAGIC;
 		node_set(0, cptab->ctb_nodemask);
 		cptab->ctb_nparts  = ncpt;
@@ -215,7 +215,7 @@ EXPORT_SYMBOL(cfs_cpt_bind);
 void
 cfs_cpu_fini(void)
 {
-	if (cfs_cpt_table != NULL) {
+	if (cfs_cpt_table) {
 		cfs_cpt_table_free(cfs_cpt_table);
 		cfs_cpt_table = NULL;
 	}
@@ -226,7 +226,7 @@ cfs_cpu_init(void)
 {
 	cfs_cpt_table = cfs_cpt_table_alloc(1);
 
-	return cfs_cpt_table != NULL ? 0 : -1;
+	return cfs_cpt_table ? 0 : -1;
 }
 
 #endif /* HAVE_LIBCFS_CPT */
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
index 32db788..2d08ba6 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
@@ -38,7 +38,7 @@
 void
 cfs_percpt_lock_free(struct cfs_percpt_lock *pcl)
 {
-	LASSERT(pcl->pcl_locks != NULL);
+	LASSERT(pcl->pcl_locks);
 	LASSERT(!pcl->pcl_locked);
 
 	cfs_percpt_free(pcl->pcl_locks);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
index 27cf861..e0a8783 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
@@ -54,7 +54,7 @@ cfs_percpt_free(void *vars)
 	arr = container_of(vars, struct cfs_var_array, va_ptrs[0]);
 
 	for (i = 0; i < arr->va_count; i++) {
-		if (arr->va_ptrs[i] != NULL)
+		if (arr->va_ptrs[i])
 			LIBCFS_FREE(arr->va_ptrs[i], arr->va_size);
 	}
 
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index 205a3ed..f3bcf20 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -81,8 +81,7 @@ int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
 		found = 0;
 		for (i = 0; i < 32; i++) {
 			debugstr = bit2str(i);
-			if (debugstr != NULL &&
-			    strlen(debugstr) == len &&
+			if (debugstr && strlen(debugstr) == len &&
 			    strncasecmp(str, debugstr, len) == 0) {
 				if (op == '-')
 					newmask &= ~(1 << i);
@@ -175,7 +174,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res)
 {
 	char *end;
 
-	if (next->ls_str == NULL)
+	if (!next->ls_str)
 		return 0;
 
 	/* skip leading white spaces */
@@ -196,7 +195,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res)
 
 	res->ls_str = next->ls_str;
 	end = memchr(next->ls_str, delim, next->ls_len);
-	if (end == NULL) {
+	if (!end) {
 		/* there is no the delimeter in the string */
 		end = next->ls_str + next->ls_len;
 		next->ls_str = NULL;
@@ -266,7 +265,7 @@ cfs_range_expr_parse(struct cfs_lstr *src, unsigned min, unsigned max,
 	struct cfs_lstr		tok;
 
 	LIBCFS_ALLOC(re, sizeof(*re));
-	if (re == NULL)
+	if (!re)
 		return -ENOMEM;
 
 	if (src->ls_len == 1 && src->ls_str[0] == '*') {
@@ -442,7 +441,7 @@ cfs_expr_list_values(struct cfs_expr_list *expr_list, int max, __u32 **valpp)
 	}
 
 	LIBCFS_ALLOC(val, sizeof(val[0]) * count);
-	if (val == NULL)
+	if (!val)
 		return -ENOMEM;
 
 	count = 0;
@@ -495,7 +494,7 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
 	int			rc;
 
 	LIBCFS_ALLOC(expr_list, sizeof(*expr_list));
-	if (expr_list == NULL)
+	if (!expr_list)
 		return -ENOMEM;
 
 	src.ls_str = str;
@@ -509,7 +508,7 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
 		src.ls_len -= 2;
 
 		rc = -EINVAL;
-		while (src.ls_str != NULL) {
+		while (src.ls_str) {
 			struct cfs_lstr tok;
 
 			if (!cfs_gettok(&src, ',', &tok)) {
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index e52afe3..41b9512 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -84,32 +84,32 @@ cfs_cpt_table_free(struct cfs_cpt_table *cptab)
 {
 	int	i;
 
-	if (cptab->ctb_cpu2cpt != NULL) {
+	if (cptab->ctb_cpu2cpt) {
 		LIBCFS_FREE(cptab->ctb_cpu2cpt,
 			    num_possible_cpus() *
 			    sizeof(cptab->ctb_cpu2cpt[0]));
 	}
 
-	for (i = 0; cptab->ctb_parts != NULL && i < cptab->ctb_nparts; i++) {
+	for (i = 0; cptab->ctb_parts && i < cptab->ctb_nparts; i++) {
 		struct cfs_cpu_partition *part = &cptab->ctb_parts[i];
 
-		if (part->cpt_nodemask != NULL) {
+		if (part->cpt_nodemask) {
 			LIBCFS_FREE(part->cpt_nodemask,
 				    sizeof(*part->cpt_nodemask));
 		}
 
-		if (part->cpt_cpumask != NULL)
+		if (part->cpt_cpumask)
 			LIBCFS_FREE(part->cpt_cpumask, cpumask_size());
 	}
 
-	if (cptab->ctb_parts != NULL) {
+	if (cptab->ctb_parts) {
 		LIBCFS_FREE(cptab->ctb_parts,
 			    cptab->ctb_nparts * sizeof(cptab->ctb_parts[0]));
 	}
 
-	if (cptab->ctb_nodemask != NULL)
+	if (cptab->ctb_nodemask)
 		LIBCFS_FREE(cptab->ctb_nodemask, sizeof(*cptab->ctb_nodemask));
-	if (cptab->ctb_cpumask != NULL)
+	if (cptab->ctb_cpumask)
 		LIBCFS_FREE(cptab->ctb_cpumask, cpumask_size());
 
 	LIBCFS_FREE(cptab, sizeof(*cptab));
@@ -123,7 +123,7 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 	int	i;
 
 	LIBCFS_ALLOC(cptab, sizeof(*cptab));
-	if (cptab == NULL)
+	if (!cptab)
 		return NULL;
 
 	cptab->ctb_nparts = ncpt;
@@ -131,19 +131,19 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 	LIBCFS_ALLOC(cptab->ctb_cpumask, cpumask_size());
 	LIBCFS_ALLOC(cptab->ctb_nodemask, sizeof(*cptab->ctb_nodemask));
 
-	if (cptab->ctb_cpumask == NULL || cptab->ctb_nodemask == NULL)
+	if (!cptab->ctb_cpumask || !cptab->ctb_nodemask)
 		goto failed;
 
 	LIBCFS_ALLOC(cptab->ctb_cpu2cpt,
 		     num_possible_cpus() * sizeof(cptab->ctb_cpu2cpt[0]));
-	if (cptab->ctb_cpu2cpt == NULL)
+	if (!cptab->ctb_cpu2cpt)
 		goto failed;
 
 	memset(cptab->ctb_cpu2cpt, -1,
 	       num_possible_cpus() * sizeof(cptab->ctb_cpu2cpt[0]));
 
 	LIBCFS_ALLOC(cptab->ctb_parts, ncpt * sizeof(cptab->ctb_parts[0]));
-	if (cptab->ctb_parts == NULL)
+	if (!cptab->ctb_parts)
 		goto failed;
 
 	for (i = 0; i < ncpt; i++) {
@@ -151,7 +151,7 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 
 		LIBCFS_ALLOC(part->cpt_cpumask, cpumask_size());
 		LIBCFS_ALLOC(part->cpt_nodemask, sizeof(*part->cpt_nodemask));
-		if (part->cpt_cpumask == NULL || part->cpt_nodemask == NULL)
+		if (!part->cpt_cpumask || !part->cpt_nodemask)
 			goto failed;
 	}
 
@@ -618,7 +618,7 @@ cfs_cpt_choose_ncpus(struct cfs_cpt_table *cptab, int cpt,
 	/* allocate scratch buffer */
 	LIBCFS_ALLOC(socket, cpumask_size());
 	LIBCFS_ALLOC(core, cpumask_size());
-	if (socket == NULL || core == NULL) {
+	if (!socket || !core) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -659,9 +659,9 @@ cfs_cpt_choose_ncpus(struct cfs_cpt_table *cptab, int cpt,
 	}
 
  out:
-	if (socket != NULL)
+	if (socket)
 		LIBCFS_FREE(socket, cpumask_size());
-	if (core != NULL)
+	if (core)
 		LIBCFS_FREE(core, cpumask_size());
 	return rc;
 }
@@ -735,7 +735,7 @@ cfs_cpt_table_create(int ncpt)
 	}
 
 	cptab = cfs_cpt_table_alloc(ncpt);
-	if (cptab == NULL) {
+	if (!cptab) {
 		CERROR("Failed to allocate CPU map(%d)\n", ncpt);
 		goto failed;
 	}
@@ -747,7 +747,7 @@ cfs_cpt_table_create(int ncpt)
 	}
 
 	LIBCFS_ALLOC(mask, cpumask_size());
-	if (mask == NULL) {
+	if (!mask) {
 		CERROR("Failed to allocate scratch cpumask\n");
 		goto failed;
 	}
@@ -793,10 +793,10 @@ cfs_cpt_table_create(int ncpt)
 	CERROR("Failed to setup CPU-partition-table with %d CPU-partitions, online HW nodes: %d, HW cpus: %d.\n",
 	       ncpt, num_online_nodes(), num_online_cpus());
 
-	if (mask != NULL)
+	if (mask)
 		LIBCFS_FREE(mask, cpumask_size());
 
-	if (cptab != NULL)
+	if (cptab)
 		cfs_cpt_table_free(cptab);
 
 	return NULL;
@@ -814,7 +814,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 
 	for (ncpt = 0;; ncpt++) { /* quick scan bracket */
 		str = strchr(str, '[');
-		if (str == NULL)
+		if (!str)
 			break;
 		str++;
 	}
@@ -836,7 +836,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 	high = node ? MAX_NUMNODES - 1 : nr_cpu_ids - 1;
 
 	cptab = cfs_cpt_table_alloc(ncpt);
-	if (cptab == NULL) {
+	if (!cptab) {
 		CERROR("Failed to allocate cpu partition table\n");
 		return NULL;
 	}
@@ -850,7 +850,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 		int			i;
 		int			n;
 
-		if (bracket == NULL) {
+		if (!bracket) {
 			if (*str != 0) {
 				CERROR("Invalid pattern %s\n", str);
 				goto failed;
@@ -885,7 +885,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 		}
 
 		bracket = strchr(str, ']');
-		if (bracket == NULL) {
+		if (!bracket) {
 			CERROR("missing right bracket for cpt %d, %s\n",
 			       cpt, str);
 			goto failed;
@@ -975,25 +975,25 @@ static struct notifier_block cfs_cpu_notifier = {
 void
 cfs_cpu_fini(void)
 {
-	if (cfs_cpt_table != NULL)
+	if (cfs_cpt_table)
 		cfs_cpt_table_free(cfs_cpt_table);
 
 #ifdef CONFIG_HOTPLUG_CPU
 	unregister_hotcpu_notifier(&cfs_cpu_notifier);
 #endif
-	if (cpt_data.cpt_cpumask != NULL)
+	if (cpt_data.cpt_cpumask)
 		LIBCFS_FREE(cpt_data.cpt_cpumask, cpumask_size());
 }
 
 int
 cfs_cpu_init(void)
 {
-	LASSERT(cfs_cpt_table == NULL);
+	LASSERT(!cfs_cpt_table);
 
 	memset(&cpt_data, 0, sizeof(cpt_data));
 
 	LIBCFS_ALLOC(cpt_data.cpt_cpumask, cpumask_size());
-	if (cpt_data.cpt_cpumask == NULL) {
+	if (!cpt_data.cpt_cpumask) {
 		CERROR("Failed to allocate scratch buffer\n");
 		return -1;
 	}
@@ -1007,7 +1007,7 @@ cfs_cpu_init(void)
 
 	if (*cpu_pattern != 0) {
 		cfs_cpt_table = cfs_cpt_table_create_pattern(cpu_pattern);
-		if (cfs_cpt_table == NULL) {
+		if (!cfs_cpt_table) {
 			CERROR("Failed to create cptab from pattern %s\n",
 			       cpu_pattern);
 			goto failed;
@@ -1015,7 +1015,7 @@ cfs_cpu_init(void)
 
 	} else {
 		cfs_cpt_table = cfs_cpt_table_create(cpu_npartitions);
-		if (cfs_cpt_table == NULL) {
+		if (!cfs_cpt_table) {
 			CERROR("Failed to create ptable with npartitions %d\n",
 			       cpu_npartitions);
 			goto failed;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index 079d50e..ccc25cd 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -45,14 +45,14 @@ static int cfs_crypto_hash_alloc(unsigned char alg_id,
 
 	*type = cfs_crypto_hash_type(alg_id);
 
-	if (*type == NULL) {
+	if (!*type) {
 		CWARN("Unsupported hash algorithm id = %d, max id is %d\n",
 		      alg_id, CFS_HASH_ALG_MAX);
 		return -EINVAL;
 	}
 	desc->tfm = crypto_alloc_hash((*type)->cht_name, 0, 0);
 
-	if (desc->tfm == NULL)
+	if (!desc->tfm)
 		return -EINVAL;
 
 	if (IS_ERR(desc->tfm)) {
@@ -69,7 +69,7 @@ static int cfs_crypto_hash_alloc(unsigned char alg_id,
 	 * Skip this function for digest, because we use shash logic at
 	 * cfs_crypto_hash_alloc.
 	 */
-	if (key != NULL)
+	if (key)
 		err = crypto_hash_setkey(desc->tfm, key, key_len);
 	else if ((*type)->cht_key != 0)
 		err = crypto_hash_setkey(desc->tfm,
@@ -99,14 +99,14 @@ int cfs_crypto_hash_digest(unsigned char alg_id,
 	int			err;
 	const struct cfs_crypto_hash_type	*type;
 
-	if (buf == NULL || buf_len == 0 || hash_len == NULL)
+	if (!buf || buf_len == 0 || !hash_len)
 		return -EINVAL;
 
 	err = cfs_crypto_hash_alloc(alg_id, &type, &hdesc, key, key_len);
 	if (err != 0)
 		return err;
 
-	if (hash == NULL || *hash_len < type->cht_size) {
+	if (!hash || *hash_len < type->cht_size) {
 		*hash_len = type->cht_size;
 		crypto_free_hash(hdesc.tfm);
 		return -ENOSPC;
@@ -131,7 +131,7 @@ struct cfs_crypto_hash_desc *
 	const struct cfs_crypto_hash_type       *type;
 
 	hdesc = kmalloc(sizeof(*hdesc), 0);
-	if (hdesc == NULL)
+	if (!hdesc)
 		return ERR_PTR(-ENOMEM);
 
 	err = cfs_crypto_hash_alloc(alg_id, &type, hdesc, key, key_len);
@@ -175,12 +175,12 @@ int cfs_crypto_hash_final(struct cfs_crypto_hash_desc *hdesc,
 	int     err;
 	int     size = crypto_hash_digestsize(((struct hash_desc *)hdesc)->tfm);
 
-	if (hash_len == NULL) {
+	if (!hash_len) {
 		crypto_free_hash(((struct hash_desc *)hdesc)->tfm);
 		kfree(hdesc);
 		return 0;
 	}
-	if (hash == NULL || *hash_len < size) {
+	if (!hash || *hash_len < size) {
 		*hash_len = size;
 		return -ENOSPC;
 	}
@@ -253,7 +253,7 @@ static int cfs_crypto_test_hashes(void)
 	unsigned int	    data_len = 1 * 128 * 1024;
 
 	data = kmalloc(data_len, 0);
-	if (data == NULL) {
+	if (!data) {
 		CERROR("Failed to allocate mem\n");
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 3358c3b..85deec9 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -80,7 +80,7 @@ void libcfs_run_debug_log_upcall(char *file)
 
 	argv[0] = lnet_debug_log_upcall;
 
-	LASSERTF(file != NULL, "called on a null filename\n");
+	LASSERTF(file, "called on a null filename\n");
 	argv[1] = file; /* only need to pass the path of the file */
 
 	argv[2] = NULL;
@@ -106,7 +106,7 @@ void libcfs_run_upcall(char **argv)
 
 	argv[0] = lnet_upcall;
 	argc = 1;
-	while (argv[argc] != NULL)
+	while (argv[argc])
 		argc++;
 
 	LASSERT(argc >= 2);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
index e5bc3d3..cbb44d7 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
@@ -102,7 +102,7 @@ libcfs_psdev_open(struct inode *inode, struct file *file)
 
 	if (!inode)
 		return -EINVAL;
-	if (libcfs_psdev_ops.p_open != NULL)
+	if (libcfs_psdev_ops.p_open)
 		rc = libcfs_psdev_ops.p_open(0, NULL);
 	else
 		return -EPERM;
@@ -117,7 +117,7 @@ libcfs_psdev_release(struct inode *inode, struct file *file)
 
 	if (!inode)
 		return -EINVAL;
-	if (libcfs_psdev_ops.p_close != NULL)
+	if (libcfs_psdev_ops.p_close)
 		rc = libcfs_psdev_ops.p_close(0, NULL);
 	else
 		rc = -EPERM;
@@ -150,7 +150,7 @@ static long libcfs_ioctl(struct file *file,
 		return 0;
 	}
 
-	if (libcfs_psdev_ops.p_ioctl != NULL)
+	if (libcfs_psdev_ops.p_ioctl)
 		rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void __user *)arg);
 	else
 		rc = -EPERM;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 64a136c..89944c0 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -63,7 +63,7 @@ int cfs_tracefile_init_arch(void)
 		cfs_trace_data[i] =
 			kmalloc(sizeof(union cfs_trace_data_union) *
 				num_possible_cpus(), GFP_KERNEL);
-		if (cfs_trace_data[i] == NULL)
+		if (!cfs_trace_data[i])
 			goto out;
 
 	}
@@ -82,7 +82,7 @@ int cfs_tracefile_init_arch(void)
 				kmalloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
 					GFP_KERNEL);
 
-			if (cfs_trace_console_buffers[i][j] == NULL)
+			if (!cfs_trace_console_buffers[i][j])
 				goto out;
 		}
 
@@ -105,7 +105,7 @@ void cfs_tracefile_fini_arch(void)
 			cfs_trace_console_buffers[i][j] = NULL;
 		}
 
-	for (i = 0; cfs_trace_data[i] != NULL; i++) {
+	for (i = 0; cfs_trace_data[i]; i++) {
 		kfree(cfs_trace_data[i]);
 		cfs_trace_data[i] = NULL;
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 45838b5..cf1498a 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -129,7 +129,7 @@ static int libcfs_ioctl_int(struct cfs_psdev_file *pfile, unsigned long cmd,
 	 * Handled in arch/cfs_module.c
 	 */
 	case IOC_LIBCFS_MARK_DEBUG:
-		if (data->ioc_inlbuf1 == NULL ||
+		if (!data->ioc_inlbuf1 ||
 		    data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0')
 			return -EINVAL;
 		libcfs_debug_mark_buffer(data->ioc_inlbuf1);
@@ -165,7 +165,7 @@ static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd,
 	int err = 0;
 
 	LIBCFS_ALLOC_GFP(buf, 1024, GFP_KERNEL);
-	if (buf == NULL)
+	if (!buf)
 		return -ENOMEM;
 
 	/* 'cmd' and permissions get checked in our arch-specific caller */
@@ -329,11 +329,11 @@ static int __proc_cpt_table(void *data, int write,
 	if (write)
 		return -EPERM;
 
-	LASSERT(cfs_cpt_table != NULL);
+	LASSERT(cfs_cpt_table);
 
 	while (1) {
 		LIBCFS_ALLOC(buf, len);
-		if (buf == NULL)
+		if (!buf)
 			return -ENOMEM;
 
 		rc = cfs_cpt_table_print(cfs_cpt_table, buf, len);
@@ -355,7 +355,7 @@ static int __proc_cpt_table(void *data, int write,
 
 	rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
  out:
-	if (buf != NULL)
+	if (buf)
 		LIBCFS_FREE(buf, len);
 	return rc;
 }
@@ -531,7 +531,7 @@ static const struct file_operations *lnet_debugfs_fops_select(umode_t mode)
 void lustre_insert_debugfs(struct ctl_table *table,
 			   const struct lnet_debugfs_symlink_def *symlinks)
 {
-	if (lnet_debugfs_root == NULL)
+	if (!lnet_debugfs_root)
 		lnet_debugfs_root = debugfs_create_dir("lnet", NULL);
 
 	/* Even if we cannot create, just ignore it altogether) */
@@ -555,8 +555,7 @@ EXPORT_SYMBOL_GPL(lustre_insert_debugfs);
 
 static void lustre_remove_debugfs(void)
 {
-	if (lnet_debugfs_root != NULL)
-		debugfs_remove_recursive(lnet_debugfs_root);
+	debugfs_remove_recursive(lnet_debugfs_root);
 
 	lnet_debugfs_root = NULL;
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index a7d9b78..c8f6a07 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -80,11 +80,11 @@ static struct cfs_trace_page *cfs_tage_alloc(gfp_t gfp)
 	 */
 	gfp |= __GFP_NOWARN;
 	page = alloc_page(gfp);
-	if (page == NULL)
+	if (!page)
 		return NULL;
 
 	tage = kmalloc(sizeof(*tage), gfp);
-	if (tage == NULL) {
+	if (!tage) {
 		__free_page(page);
 		return NULL;
 	}
@@ -96,9 +96,6 @@ static struct cfs_trace_page *cfs_tage_alloc(gfp_t gfp)
 
 static void cfs_tage_free(struct cfs_trace_page *tage)
 {
-	__LASSERT(tage != NULL);
-	__LASSERT(tage->page != NULL);
-
 	__free_page(tage->page);
 	kfree(tage);
 	atomic_dec(&cfs_tage_allocated);
@@ -107,9 +104,6 @@ static void cfs_tage_free(struct cfs_trace_page *tage)
 static void cfs_tage_to_tail(struct cfs_trace_page *tage,
 			     struct list_head *queue)
 {
-	__LASSERT(tage != NULL);
-	__LASSERT(queue != NULL);
-
 	list_move_tail(&tage->linkage, queue);
 }
 
@@ -127,7 +121,7 @@ int cfs_trace_refill_stock(struct cfs_trace_cpu_data *tcd, gfp_t gfp,
 		struct cfs_trace_page *tage;
 
 		tage = cfs_tage_alloc(gfp);
-		if (tage == NULL)
+		if (!tage)
 			break;
 		list_add_tail(&tage->linkage, stock);
 	}
@@ -154,7 +148,7 @@ cfs_trace_get_tage_try(struct cfs_trace_cpu_data *tcd, unsigned long len)
 			list_del_init(&tage->linkage);
 		} else {
 			tage = cfs_tage_alloc(GFP_ATOMIC);
-			if (unlikely(tage == NULL)) {
+			if (unlikely(!tage)) {
 				if ((!memory_pressure_get() ||
 				     in_interrupt()) && printk_ratelimit())
 					printk(KERN_WARNING
@@ -227,7 +221,7 @@ static struct cfs_trace_page *cfs_trace_get_tage(struct cfs_trace_cpu_data *tcd,
 	}
 
 	tage = cfs_trace_get_tage_try(tcd, len);
-	if (tage != NULL)
+	if (tage)
 		return tage;
 	if (thread_running)
 		cfs_tcd_shrink(tcd);
@@ -281,7 +275,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	 * warning on Linux when debugging is enabled. */
 	cfs_set_ptldebug_header(&header, msgdata, CDEBUG_STACK());
 
-	if (tcd == NULL)		/* arch may not log in IRQ context */
+	if (!tcd)		/* arch may not log in IRQ context */
 		goto console;
 
 	if (tcd->tcd_cur_pages == 0)
@@ -308,7 +302,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	 */
 	for (i = 0; i < 2; i++) {
 		tage = cfs_trace_get_tage(tcd, needed + known_size + 1);
-		if (tage == NULL) {
+		if (!tage) {
 			if (needed + known_size > PAGE_CACHE_SIZE)
 				mask |= D_ERROR;
 
@@ -389,18 +383,18 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 console:
 	if ((mask & libcfs_printk) == 0) {
 		/* no console output requested */
-		if (tcd != NULL)
+		if (tcd)
 			cfs_trace_put_tcd(tcd);
 		return 1;
 	}
 
-	if (cdls != NULL) {
+	if (cdls) {
 		if (libcfs_console_ratelimit &&
 		    cdls->cdls_next != 0 &&     /* not first time ever */
 		    !cfs_time_after(cfs_time_current(), cdls->cdls_next)) {
 			/* skipping a console message */
 			cdls->cdls_count++;
-			if (tcd != NULL)
+			if (tcd)
 				cfs_trace_put_tcd(tcd);
 			return 1;
 		}
@@ -423,7 +417,7 @@ console:
 		cdls->cdls_next = (cfs_time_current() + cdls->cdls_delay) | 1;
 	}
 
-	if (tcd != NULL) {
+	if (tcd) {
 		cfs_print_to_console(&header, mask, string_buf, needed, file,
 				     msgdata->msg_fn);
 		cfs_trace_put_tcd(tcd);
@@ -431,14 +425,14 @@ console:
 		string_buf = cfs_trace_get_console_buffer();
 
 		needed = 0;
-		if (format1 != NULL) {
+		if (format1) {
 			va_copy(ap, args);
 			needed = vsnprintf(string_buf,
 					   CFS_TRACE_CONSOLE_BUFFER_SIZE,
 					   format1, ap);
 			va_end(ap);
 		}
-		if (format2 != NULL) {
+		if (format2) {
 			remain = CFS_TRACE_CONSOLE_BUFFER_SIZE - needed;
 			if (remain > 0) {
 				va_start(ap, format2);
@@ -453,7 +447,7 @@ console:
 		put_cpu();
 	}
 
-	if (cdls != NULL && cdls->cdls_count != 0) {
+	if (cdls && cdls->cdls_count != 0) {
 		string_buf = cfs_trace_get_console_buffer();
 
 		needed = snprintf(string_buf, CFS_TRACE_CONSOLE_BUFFER_SIZE,
@@ -783,7 +777,7 @@ int cfs_trace_copyout_string(char __user *usr_buffer, int usr_buffer_nob,
 	if (copy_to_user(usr_buffer, knl_buffer, nob))
 		return -EFAULT;
 
-	if (append != NULL && nob < usr_buffer_nob) {
+	if (append && nob < usr_buffer_nob) {
 		if (copy_to_user(usr_buffer + nob, append, 1))
 			return -EFAULT;
 
@@ -800,7 +794,7 @@ int cfs_trace_allocate_string_buffer(char **str, int nob)
 		return -EINVAL;
 
 	*str = kmalloc(nob, GFP_KERNEL | __GFP_ZERO);
-	if (*str == NULL)
+	if (!*str)
 		return -ENOMEM;
 
 	return 0;
@@ -978,7 +972,7 @@ static int tracefiled(void *arg)
 			}
 		}
 		cfs_tracefile_read_unlock();
-		if (filp == NULL) {
+		if (!filp) {
 			put_pages_on_daemon_list(&pc);
 			__LASSERT(list_empty(&pc.pc_pages));
 			goto end_loop;
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 7bf1471..67a701f 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -185,10 +185,10 @@ union cfs_trace_data_union {
 extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];
 
 #define cfs_tcd_for_each(tcd, i, j)				       \
-    for (i = 0; cfs_trace_data[i] != NULL; i++)			   \
-	for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd);	       \
-	     j < num_possible_cpus();				 \
-	     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
+	for (i = 0; cfs_trace_data[i]; i++)				\
+		for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd);	\
+		     j < num_possible_cpus();				 \
+		     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
 
 #define cfs_tcd_for_each_type_lock(tcd, i, cpu)			   \
     for (i = 0; cfs_trace_data[i] &&				      \
@@ -308,8 +308,8 @@ do {								    \
 
 #define __LASSERT_TAGE_INVARIANT(tage)				  \
 do {								    \
-	__LASSERT(tage != NULL);					\
-	__LASSERT(tage->page != NULL);				  \
+	__LASSERT(tage);					\
+	__LASSERT(tage->page);				  \
 	__LASSERT(tage->used <= PAGE_CACHE_SIZE);			 \
 	__LASSERT(page_count(tage->page) > 0);		      \
 } while (0)
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 60bb88a..97ae5c1 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -212,7 +212,7 @@ cfs_wi_scheduler (void *arg)
 	cfs_block_allsigs();
 
 	/* CPT affinity scheduler? */
-	if (sched->ws_cptab != NULL)
+	if (sched->ws_cptab)
 		if (cfs_cpt_bind(sched->ws_cptab, sched->ws_cpt) != 0)
 			CWARN("Failed to bind %s on CPT %d\n",
 			      sched->ws_name, sched->ws_cpt);
@@ -343,11 +343,11 @@ cfs_wi_sched_create(char *name, struct cfs_cpt_table *cptab,
 
 	LASSERT(cfs_wi_data.wi_init);
 	LASSERT(!cfs_wi_data.wi_stopping);
-	LASSERT(cptab == NULL || cpt == CFS_CPT_ANY ||
+	LASSERT(!cptab || cpt == CFS_CPT_ANY ||
 		(cpt >= 0 && cpt < cfs_cpt_number(cptab)));
 
 	LIBCFS_ALLOC(sched, sizeof(*sched));
-	if (sched == NULL)
+	if (!sched)
 		return -ENOMEM;
 
 	strlcpy(sched->ws_name, name, CFS_WS_NAME_LEN);
@@ -376,7 +376,7 @@ cfs_wi_sched_create(char *name, struct cfs_cpt_table *cptab,
 		sched->ws_starting++;
 		spin_unlock(&cfs_wi_data.wi_glock);
 
-		if (sched->ws_cptab != NULL && sched->ws_cpt >= 0) {
+		if (sched->ws_cptab && sched->ws_cpt >= 0) {
 			snprintf(name, sizeof(name), "%s_%02d_%02u",
 				 sched->ws_name, sched->ws_cpt,
 				 sched->ws_nthreads);
-- 
2.1.0

[lustre-devel] [PATCH 12/45] staging/lustre/libcfs: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"
Also removed some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c       |   4 +-
 drivers/staging/lustre/lustre/libcfs/hash.c        | 104 ++++++++++-----------
 drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c  |   6 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c |   2 +-
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c  |   2 +-
 .../staging/lustre/lustre/libcfs/libcfs_string.c   |  15 ++-
 .../staging/lustre/lustre/libcfs/linux/linux-cpu.c |  58 ++++++------
 .../lustre/lustre/libcfs/linux/linux-crypto.c      |  18 ++--
 .../lustre/lustre/libcfs/linux/linux-debug.c       |   4 +-
 .../lustre/lustre/libcfs/linux/linux-module.c      |   6 +-
 .../lustre/lustre/libcfs/linux/linux-tracefile.c   |   6 +-
 drivers/staging/lustre/lustre/libcfs/module.c      |  15 ++-
 drivers/staging/lustre/lustre/libcfs/tracefile.c   |  40 ++++----
 drivers/staging/lustre/lustre/libcfs/tracefile.h   |  12 +--
 drivers/staging/lustre/lustre/libcfs/workitem.c    |   8 +-
 15 files changed, 143 insertions(+), 157 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 6274558..589b548 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -378,7 +378,7 @@ libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys)
 				continue;
 
 			token = fn(i);
-			if (token == NULL)	      /* unused bit */
+			if (!token)	      /* unused bit */
 				continue;
 
 			if (len > 0) {		  /* separator? */
@@ -505,7 +505,7 @@ int libcfs_debug_init(unsigned long bufsize)
 		libcfs_console_min_delay = CDEBUG_DEFAULT_MIN_DELAY;
 	}
 
-	if (libcfs_debug_file_path != NULL) {
+	if (libcfs_debug_file_path) {
 		strlcpy(libcfs_debug_file_path_arr,
 			libcfs_debug_file_path,
 			sizeof(libcfs_debug_file_path_arr));
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index 4d50510..ad831fa 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -355,7 +355,7 @@ cfs_hash_dh_hnode_add(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dh_hhead(hs, bd),
 			  struct cfs_hash_dhead, dh_head);
-	if (dh->dh_tail != NULL) /* not empty */
+	if (dh->dh_tail) /* not empty */
 		hlist_add_behind(hnode, dh->dh_tail);
 	else /* empty list */
 		hlist_add_head(hnode, &dh->dh_head);
@@ -371,7 +371,7 @@ cfs_hash_dh_hnode_del(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dh_hhead(hs, bd),
 			  struct cfs_hash_dhead, dh_head);
-	if (hnd->next == NULL) { /* it's the tail */
+	if (!hnd->next) { /* it's the tail */
 		dh->dh_tail = (hnd->pprev == &dh->dh_head.first) ? NULL :
 			      container_of(hnd->pprev, struct hlist_node, next);
 	}
@@ -412,7 +412,7 @@ cfs_hash_dd_hnode_add(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dd_hhead(hs, bd),
 			  struct cfs_hash_dhead_dep, dd_head);
-	if (dh->dd_tail != NULL) /* not empty */
+	if (dh->dd_tail) /* not empty */
 		hlist_add_behind(hnode, dh->dd_tail);
 	else /* empty list */
 		hlist_add_head(hnode, &dh->dd_head);
@@ -428,7 +428,7 @@ cfs_hash_dd_hnode_del(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 
 	dh = container_of(cfs_hash_dd_hhead(hs, bd),
 			  struct cfs_hash_dhead_dep, dd_head);
-	if (hnd->next == NULL) { /* it's the tail */
+	if (!hnd->next) { /* it's the tail */
 		dh->dd_tail = (hnd->pprev == &dh->dd_head.first) ? NULL :
 			      container_of(hnd->pprev, struct hlist_node, next);
 	}
@@ -492,7 +492,7 @@ void
 cfs_hash_bd_get(struct cfs_hash *hs, const void *key, struct cfs_hash_bd *bd)
 {
 	/* NB: caller should hold hs->hs_rwlock if REHASH is set */
-	if (likely(hs->hs_rehash_buckets == NULL)) {
+	if (likely(!hs->hs_rehash_buckets)) {
 		cfs_hash_bd_from_key(hs, hs->hs_buckets,
 				     hs->hs_cur_bits, key, bd);
 	} else {
@@ -641,7 +641,7 @@ cfs_hash_bd_lookup_intent(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 		if (!cfs_hash_keycmp(hs, key, ehnode))
 			continue;
 
-		if (match != NULL && match != ehnode) /* can't match */
+		if (match && match != ehnode) /* can't match */
 			continue;
 
 		/* match and ... */
@@ -659,7 +659,7 @@ cfs_hash_bd_lookup_intent(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 	if (!intent_add)
 		return NULL;
 
-	LASSERT(hnode != NULL);
+	LASSERT(hnode);
 	cfs_hash_bd_add_locked(hs, bd, hnode);
 	return hnode;
 }
@@ -698,8 +698,7 @@ cfs_hash_multi_bd_lock(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 		if (prev == bds[i].bd_bucket)
 			continue;
 
-		LASSERT(prev == NULL ||
-			prev->hsb_index < bds[i].bd_bucket->hsb_index);
+		LASSERT(!prev || prev->hsb_index < bds[i].bd_bucket->hsb_index);
 		cfs_hash_bd_lock(hs, &bds[i], excl);
 		prev = bds[i].bd_bucket;
 	}
@@ -730,7 +729,7 @@ cfs_hash_multi_bd_lookup_locked(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 	cfs_hash_for_each_bd(bds, n, i) {
 		ehnode = cfs_hash_bd_lookup_intent(hs, &bds[i], key, NULL,
 						   CFS_HS_LOOKUP_IT_FIND);
-		if (ehnode != NULL)
+		if (ehnode)
 			return ehnode;
 	}
 	return NULL;
@@ -745,13 +744,13 @@ cfs_hash_multi_bd_findadd_locked(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 	int intent;
 	unsigned i;
 
-	LASSERT(hnode != NULL);
+	LASSERT(hnode);
 	intent = (!noref * CFS_HS_LOOKUP_MASK_REF) | CFS_HS_LOOKUP_IT_PEEK;
 
 	cfs_hash_for_each_bd(bds, n, i) {
 		ehnode = cfs_hash_bd_lookup_intent(hs, &bds[i], key,
 						   NULL, intent);
-		if (ehnode != NULL)
+		if (ehnode)
 			return ehnode;
 	}
 
@@ -778,7 +777,7 @@ cfs_hash_multi_bd_finddel_locked(struct cfs_hash *hs, struct cfs_hash_bd *bds,
 	cfs_hash_for_each_bd(bds, n, i) {
 		ehnode = cfs_hash_bd_lookup_intent(hs, &bds[i], key, hnode,
 						   CFS_HS_LOOKUP_IT_FINDDEL);
-		if (ehnode != NULL)
+		if (ehnode)
 			return ehnode;
 	}
 	return NULL;
@@ -789,10 +788,10 @@ cfs_hash_bd_order(struct cfs_hash_bd *bd1, struct cfs_hash_bd *bd2)
 {
 	int rc;
 
-	if (bd2->bd_bucket == NULL)
+	if (!bd2->bd_bucket)
 		return;
 
-	if (bd1->bd_bucket == NULL) {
+	if (!bd1->bd_bucket) {
 		*bd1 = *bd2;
 		bd2->bd_bucket = NULL;
 		return;
@@ -818,7 +817,7 @@ cfs_hash_dual_bd_get(struct cfs_hash *hs, const void *key,
 	/* NB: caller should hold hs_lock.rw if REHASH is set */
 	cfs_hash_bd_from_key(hs, hs->hs_buckets,
 			     hs->hs_cur_bits, key, &bds[0]);
-	if (likely(hs->hs_rehash_buckets == NULL)) {
+	if (likely(!hs->hs_rehash_buckets)) {
 		/* no rehash or not rehashing */
 		bds[1].bd_bucket = NULL;
 		return;
@@ -873,7 +872,7 @@ cfs_hash_buckets_free(struct cfs_hash_bucket **buckets,
 	int i;
 
 	for (i = prev_size; i < size; i++) {
-		if (buckets[i] != NULL)
+		if (buckets[i])
 			LIBCFS_FREE(buckets[i], bkt_size);
 	}
 
@@ -892,16 +891,16 @@ cfs_hash_buckets_realloc(struct cfs_hash *hs, struct cfs_hash_bucket **old_bkts,
 	struct cfs_hash_bucket **new_bkts;
 	int i;
 
-	LASSERT(old_size == 0 || old_bkts != NULL);
+	LASSERT(old_size == 0 || old_bkts);
 
-	if (old_bkts != NULL && old_size == new_size)
+	if (old_bkts && old_size == new_size)
 		return old_bkts;
 
 	LIBCFS_ALLOC(new_bkts, sizeof(new_bkts[0]) * new_size);
-	if (new_bkts == NULL)
+	if (!new_bkts)
 		return NULL;
 
-	if (old_bkts != NULL) {
+	if (old_bkts) {
 		memcpy(new_bkts, old_bkts,
 		       min(old_size, new_size) * sizeof(*old_bkts));
 	}
@@ -911,7 +910,7 @@ cfs_hash_buckets_realloc(struct cfs_hash *hs, struct cfs_hash_bucket **old_bkts,
 		struct cfs_hash_bd bd;
 
 		LIBCFS_ALLOC(new_bkts[i], cfs_hash_bkt_size(hs));
-		if (new_bkts[i] == NULL) {
+		if (!new_bkts[i]) {
 			cfs_hash_buckets_free(new_bkts, cfs_hash_bkt_size(hs),
 					      old_size, new_size);
 			return NULL;
@@ -1011,14 +1010,13 @@ cfs_hash_create(char *name, unsigned cur_bits, unsigned max_bits,
 
 	CLASSERT(CFS_HASH_THETA_BITS < 15);
 
-	LASSERT(name != NULL);
-	LASSERT(ops != NULL);
+	LASSERT(name);
 	LASSERT(ops->hs_key);
 	LASSERT(ops->hs_hash);
 	LASSERT(ops->hs_object);
 	LASSERT(ops->hs_keycmp);
-	LASSERT(ops->hs_get != NULL);
-	LASSERT(ops->hs_put_locked != NULL);
+	LASSERT(ops->hs_get);
+	LASSERT(ops->hs_put_locked);
 
 	if ((flags & CFS_HASH_REHASH) != 0)
 		flags |= CFS_HASH_COUNTER; /* must have counter */
@@ -1029,13 +1027,12 @@ cfs_hash_create(char *name, unsigned cur_bits, unsigned max_bits,
 	LASSERT(ergo((flags & CFS_HASH_REHASH) == 0, cur_bits == max_bits));
 	LASSERT(ergo((flags & CFS_HASH_REHASH) != 0,
 		     (flags & CFS_HASH_NO_LOCK) == 0));
-	LASSERT(ergo((flags & CFS_HASH_REHASH_KEY) != 0,
-		      ops->hs_keycpy != NULL));
+	LASSERT(ergo((flags & CFS_HASH_REHASH_KEY) != 0, ops->hs_keycpy));
 
 	len = (flags & CFS_HASH_BIGNAME) == 0 ?
 	      CFS_HASH_NAME_LEN : CFS_HASH_BIGNAME_LEN;
 	LIBCFS_ALLOC(hs, offsetof(struct cfs_hash, hs_name[len]));
-	if (hs == NULL)
+	if (!hs)
 		return NULL;
 
 	strlcpy(hs->hs_name, name, len);
@@ -1063,7 +1060,7 @@ cfs_hash_create(char *name, unsigned cur_bits, unsigned max_bits,
 
 	hs->hs_buckets = cfs_hash_buckets_realloc(hs, NULL, 0,
 						  CFS_HASH_NBKT(hs));
-	if (hs->hs_buckets != NULL)
+	if (hs->hs_buckets)
 		return hs;
 
 	LIBCFS_FREE(hs, offsetof(struct cfs_hash, hs_name[len]));
@@ -1082,7 +1079,7 @@ cfs_hash_destroy(struct cfs_hash *hs)
 	struct cfs_hash_bd bd;
 	int i;
 
-	LASSERT(hs != NULL);
+	LASSERT(hs);
 	LASSERT(!cfs_hash_is_exiting(hs) &&
 		!cfs_hash_is_iterating(hs));
 
@@ -1096,13 +1093,12 @@ cfs_hash_destroy(struct cfs_hash *hs)
 
 	cfs_hash_depth_wi_cancel(hs);
 	/* rehash should be done/canceled */
-	LASSERT(hs->hs_buckets != NULL &&
-		hs->hs_rehash_buckets == NULL);
+	LASSERT(hs->hs_buckets && !hs->hs_rehash_buckets);
 
 	cfs_hash_for_each_bucket(hs, &bd, i) {
 		struct hlist_head *hhead;
 
-		LASSERT(bd.bd_bucket != NULL);
+		LASSERT(bd.bd_bucket);
 		/* no need to take this lock, just for consistent code */
 		cfs_hash_bd_lock(hs, &bd, 1);
 
@@ -1293,8 +1289,8 @@ cfs_hash_del(struct cfs_hash *hs, const void *key, struct hlist_node *hnode)
 	cfs_hash_dual_bd_get_and_lock(hs, key, bds, 1);
 
 	/* NB: do nothing if @hnode is not in hash table */
-	if (hnode == NULL || !hlist_unhashed(hnode)) {
-		if (bds[1].bd_bucket == NULL && hnode != NULL) {
+	if (!hnode || !hlist_unhashed(hnode)) {
+		if (!bds[1].bd_bucket && hnode) {
 			cfs_hash_bd_del_locked(hs, &bds[0], hnode);
 		} else {
 			hnode = cfs_hash_dual_bd_finddel_locked(hs, bds,
@@ -1302,7 +1298,7 @@ cfs_hash_del(struct cfs_hash *hs, const void *key, struct hlist_node *hnode)
 		}
 	}
 
-	if (hnode != NULL) {
+	if (hnode) {
 		obj  = cfs_hash_object(hs, hnode);
 		bits = cfs_hash_rehash_bits(hs);
 	}
@@ -1348,7 +1344,7 @@ cfs_hash_lookup(struct cfs_hash *hs, const void *key)
 	cfs_hash_dual_bd_get_and_lock(hs, key, bds, 0);
 
 	hnode = cfs_hash_dual_bd_lookup_locked(hs, bds, key);
-	if (hnode != NULL)
+	if (hnode)
 		obj = cfs_hash_object(hs, hnode);
 
 	cfs_hash_dual_bd_unlock(hs, bds, 0);
@@ -1436,7 +1432,7 @@ cfs_hash_for_each_tight(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 		struct hlist_head *hhead;
 
 		cfs_hash_bd_lock(hs, &bd, excl);
-		if (func == NULL) { /* only glimpse size */
+		if (!func) { /* only glimpse size */
 			count += bd.bd_bucket->hsb_count;
 			cfs_hash_bd_unlock(hs, &bd, excl);
 			continue;
@@ -1574,7 +1570,7 @@ cfs_hash_for_each_relax(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 
 	stop_on_change = cfs_hash_with_rehash_key(hs) ||
 			 !cfs_hash_with_no_itemref(hs) ||
-			 hs->hs_ops->hs_put_locked == NULL;
+			 !hs->hs_ops->hs_put_locked;
 	cfs_hash_lock(hs, 0);
 	LASSERT(!cfs_hash_is_rehashing(hs));
 
@@ -1585,7 +1581,7 @@ cfs_hash_for_each_relax(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 		version = cfs_hash_bd_version_get(&bd);
 
 		cfs_hash_bd_for_each_hlist(hs, &bd, hhead) {
-			for (hnode = hhead->first; hnode != NULL;) {
+			for (hnode = hhead->first; hnode;) {
 				cfs_hash_bucket_validate(hs, &bd, hnode);
 				cfs_hash_get(hs, hnode);
 				cfs_hash_bd_unlock(hs, &bd, 0);
@@ -1634,9 +1630,8 @@ cfs_hash_for_each_nolock(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 	    !cfs_hash_with_no_itemref(hs))
 		return -EOPNOTSUPP;
 
-	if (hs->hs_ops->hs_get == NULL ||
-	    (hs->hs_ops->hs_put == NULL &&
-	     hs->hs_ops->hs_put_locked == NULL))
+	if (!hs->hs_ops->hs_get ||
+	    (!hs->hs_ops->hs_put && !hs->hs_ops->hs_put_locked))
 		return -EOPNOTSUPP;
 
 	cfs_hash_for_each_enter(hs);
@@ -1667,9 +1662,8 @@ cfs_hash_for_each_empty(struct cfs_hash *hs, cfs_hash_for_each_cb_t func,
 	if (cfs_hash_with_no_lock(hs))
 		return -EOPNOTSUPP;
 
-	if (hs->hs_ops->hs_get == NULL ||
-	    (hs->hs_ops->hs_put == NULL &&
-	     hs->hs_ops->hs_put_locked == NULL))
+	if (!hs->hs_ops->hs_get ||
+	    (!hs->hs_ops->hs_put && !hs->hs_ops->hs_put_locked))
 		return -EOPNOTSUPP;
 
 	cfs_hash_for_each_enter(hs);
@@ -1837,7 +1831,7 @@ cfs_hash_rehash_bd(struct cfs_hash *hs, struct cfs_hash_bd *old)
 	cfs_hash_bd_for_each_hlist(hs, old, hhead) {
 		hlist_for_each_safe(hnode, pos, hhead) {
 			key = cfs_hash_key(hs, hnode);
-			LASSERT(key != NULL);
+			LASSERT(key);
 			/* Validate hnode is in the correct bucket. */
 			cfs_hash_bucket_validate(hs, old, hnode);
 			/*
@@ -1867,7 +1861,7 @@ cfs_hash_rehash_worker(cfs_workitem_t *wi)
 	int rc = 0;
 	int i;
 
-	LASSERT(hs != NULL && cfs_hash_with_rehash(hs));
+	LASSERT(hs && cfs_hash_with_rehash(hs));
 
 	cfs_hash_lock(hs, 0);
 	LASSERT(cfs_hash_is_rehashing(hs));
@@ -1884,7 +1878,7 @@ cfs_hash_rehash_worker(cfs_workitem_t *wi)
 	bkts = cfs_hash_buckets_realloc(hs, hs->hs_buckets,
 					old_size, new_size);
 	cfs_hash_lock(hs, 1);
-	if (bkts == NULL) {
+	if (!bkts) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1903,7 +1897,7 @@ cfs_hash_rehash_worker(cfs_workitem_t *wi)
 		goto out;
 	}
 
-	LASSERT(hs->hs_rehash_buckets == NULL);
+	LASSERT(!hs->hs_rehash_buckets);
 	hs->hs_rehash_buckets = bkts;
 
 	rc = 0;
@@ -1946,7 +1940,7 @@ out:
 	bsize = cfs_hash_bkt_size(hs);
 	cfs_hash_unlock(hs, 1);
 	/* can't refer to @hs anymore because it could be destroyed */
-	if (bkts != NULL)
+	if (bkts)
 		cfs_hash_buckets_free(bkts, bsize, new_size, old_size);
 	if (rc != 0)
 		CDEBUG(D_INFO, "early quit of rehashing: %d\n", rc);
@@ -1987,7 +1981,7 @@ void cfs_hash_rehash_key(struct cfs_hash *hs, const void *old_key,
 	cfs_hash_bd_order(&bds[0], &bds[1]);
 
 	cfs_hash_multi_bd_lock(hs, bds, 3, 1);
-	if (likely(old_bds[1].bd_bucket == NULL)) {
+	if (likely(!old_bds[1].bd_bucket)) {
 		cfs_hash_bd_move_locked(hs, &old_bds[0], &new_bd, hnode);
 	} else {
 		cfs_hash_dual_bd_finddel_locked(hs, old_bds, old_key, hnode);
@@ -2013,7 +2007,7 @@ static struct cfs_hash_bucket **
 cfs_hash_full_bkts(struct cfs_hash *hs)
 {
 	/* NB: caller should hold hs->hs_rwlock if REHASH is set */
-	if (hs->hs_rehash_buckets == NULL)
+	if (!hs->hs_rehash_buckets)
 		return hs->hs_buckets;
 
 	LASSERT(hs->hs_rehash_bits != 0);
@@ -2025,7 +2019,7 @@ static unsigned int
 cfs_hash_full_nbkt(struct cfs_hash *hs)
 {
 	/* NB: caller should hold hs->hs_rwlock if REHASH is set */
-	if (hs->hs_rehash_buckets == NULL)
+	if (!hs->hs_rehash_buckets)
 		return CFS_HASH_NBKT(hs);
 
 	LASSERT(hs->hs_rehash_bits != 0);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
index ba97c79..9137df9 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
@@ -56,7 +56,7 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 	}
 
 	LIBCFS_ALLOC(cptab, sizeof(*cptab));
-	if (cptab != NULL) {
+	if (cptab) {
 		cptab->ctb_version = CFS_CPU_VERSION_MAGIC;
 		node_set(0, cptab->ctb_nodemask);
 		cptab->ctb_nparts  = ncpt;
@@ -215,7 +215,7 @@ EXPORT_SYMBOL(cfs_cpt_bind);
 void
 cfs_cpu_fini(void)
 {
-	if (cfs_cpt_table != NULL) {
+	if (cfs_cpt_table) {
 		cfs_cpt_table_free(cfs_cpt_table);
 		cfs_cpt_table = NULL;
 	}
@@ -226,7 +226,7 @@ cfs_cpu_init(void)
 {
 	cfs_cpt_table = cfs_cpt_table_alloc(1);
 
-	return cfs_cpt_table != NULL ? 0 : -1;
+	return cfs_cpt_table ? 0 : -1;
 }
 
 #endif /* HAVE_LIBCFS_CPT */
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
index 32db788..2d08ba6 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
@@ -38,7 +38,7 @@
 void
 cfs_percpt_lock_free(struct cfs_percpt_lock *pcl)
 {
-	LASSERT(pcl->pcl_locks != NULL);
+	LASSERT(pcl->pcl_locks);
 	LASSERT(!pcl->pcl_locked);
 
 	cfs_percpt_free(pcl->pcl_locks);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
index 27cf861..e0a8783 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
@@ -54,7 +54,7 @@ cfs_percpt_free(void *vars)
 	arr = container_of(vars, struct cfs_var_array, va_ptrs[0]);
 
 	for (i = 0; i < arr->va_count; i++) {
-		if (arr->va_ptrs[i] != NULL)
+		if (arr->va_ptrs[i])
 			LIBCFS_FREE(arr->va_ptrs[i], arr->va_size);
 	}
 
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index 205a3ed..f3bcf20 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -81,8 +81,7 @@ int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
 		found = 0;
 		for (i = 0; i < 32; i++) {
 			debugstr = bit2str(i);
-			if (debugstr != NULL &&
-			    strlen(debugstr) == len &&
+			if (debugstr && strlen(debugstr) == len &&
 			    strncasecmp(str, debugstr, len) == 0) {
 				if (op == '-')
 					newmask &= ~(1 << i);
@@ -175,7 +174,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res)
 {
 	char *end;
 
-	if (next->ls_str == NULL)
+	if (!next->ls_str)
 		return 0;
 
 	/* skip leading white spaces */
@@ -196,7 +195,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res)
 
 	res->ls_str = next->ls_str;
 	end = memchr(next->ls_str, delim, next->ls_len);
-	if (end == NULL) {
+	if (!end) {
 		/* there is no the delimeter in the string */
 		end = next->ls_str + next->ls_len;
 		next->ls_str = NULL;
@@ -266,7 +265,7 @@ cfs_range_expr_parse(struct cfs_lstr *src, unsigned min, unsigned max,
 	struct cfs_lstr		tok;
 
 	LIBCFS_ALLOC(re, sizeof(*re));
-	if (re == NULL)
+	if (!re)
 		return -ENOMEM;
 
 	if (src->ls_len == 1 && src->ls_str[0] == '*') {
@@ -442,7 +441,7 @@ cfs_expr_list_values(struct cfs_expr_list *expr_list, int max, __u32 **valpp)
 	}
 
 	LIBCFS_ALLOC(val, sizeof(val[0]) * count);
-	if (val == NULL)
+	if (!val)
 		return -ENOMEM;
 
 	count = 0;
@@ -495,7 +494,7 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
 	int			rc;
 
 	LIBCFS_ALLOC(expr_list, sizeof(*expr_list));
-	if (expr_list == NULL)
+	if (!expr_list)
 		return -ENOMEM;
 
 	src.ls_str = str;
@@ -509,7 +508,7 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
 		src.ls_len -= 2;
 
 		rc = -EINVAL;
-		while (src.ls_str != NULL) {
+		while (src.ls_str) {
 			struct cfs_lstr tok;
 
 			if (!cfs_gettok(&src, ',', &tok)) {
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index e52afe3..41b9512 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -84,32 +84,32 @@ cfs_cpt_table_free(struct cfs_cpt_table *cptab)
 {
 	int	i;
 
-	if (cptab->ctb_cpu2cpt != NULL) {
+	if (cptab->ctb_cpu2cpt) {
 		LIBCFS_FREE(cptab->ctb_cpu2cpt,
 			    num_possible_cpus() *
 			    sizeof(cptab->ctb_cpu2cpt[0]));
 	}
 
-	for (i = 0; cptab->ctb_parts != NULL && i < cptab->ctb_nparts; i++) {
+	for (i = 0; cptab->ctb_parts && i < cptab->ctb_nparts; i++) {
 		struct cfs_cpu_partition *part = &cptab->ctb_parts[i];
 
-		if (part->cpt_nodemask != NULL) {
+		if (part->cpt_nodemask) {
 			LIBCFS_FREE(part->cpt_nodemask,
 				    sizeof(*part->cpt_nodemask));
 		}
 
-		if (part->cpt_cpumask != NULL)
+		if (part->cpt_cpumask)
 			LIBCFS_FREE(part->cpt_cpumask, cpumask_size());
 	}
 
-	if (cptab->ctb_parts != NULL) {
+	if (cptab->ctb_parts) {
 		LIBCFS_FREE(cptab->ctb_parts,
 			    cptab->ctb_nparts * sizeof(cptab->ctb_parts[0]));
 	}
 
-	if (cptab->ctb_nodemask != NULL)
+	if (cptab->ctb_nodemask)
 		LIBCFS_FREE(cptab->ctb_nodemask, sizeof(*cptab->ctb_nodemask));
-	if (cptab->ctb_cpumask != NULL)
+	if (cptab->ctb_cpumask)
 		LIBCFS_FREE(cptab->ctb_cpumask, cpumask_size());
 
 	LIBCFS_FREE(cptab, sizeof(*cptab));
@@ -123,7 +123,7 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 	int	i;
 
 	LIBCFS_ALLOC(cptab, sizeof(*cptab));
-	if (cptab == NULL)
+	if (!cptab)
 		return NULL;
 
 	cptab->ctb_nparts = ncpt;
@@ -131,19 +131,19 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 	LIBCFS_ALLOC(cptab->ctb_cpumask, cpumask_size());
 	LIBCFS_ALLOC(cptab->ctb_nodemask, sizeof(*cptab->ctb_nodemask));
 
-	if (cptab->ctb_cpumask == NULL || cptab->ctb_nodemask == NULL)
+	if (!cptab->ctb_cpumask || !cptab->ctb_nodemask)
 		goto failed;
 
 	LIBCFS_ALLOC(cptab->ctb_cpu2cpt,
 		     num_possible_cpus() * sizeof(cptab->ctb_cpu2cpt[0]));
-	if (cptab->ctb_cpu2cpt == NULL)
+	if (!cptab->ctb_cpu2cpt)
 		goto failed;
 
 	memset(cptab->ctb_cpu2cpt, -1,
 	       num_possible_cpus() * sizeof(cptab->ctb_cpu2cpt[0]));
 
 	LIBCFS_ALLOC(cptab->ctb_parts, ncpt * sizeof(cptab->ctb_parts[0]));
-	if (cptab->ctb_parts == NULL)
+	if (!cptab->ctb_parts)
 		goto failed;
 
 	for (i = 0; i < ncpt; i++) {
@@ -151,7 +151,7 @@ cfs_cpt_table_alloc(unsigned int ncpt)
 
 		LIBCFS_ALLOC(part->cpt_cpumask, cpumask_size());
 		LIBCFS_ALLOC(part->cpt_nodemask, sizeof(*part->cpt_nodemask));
-		if (part->cpt_cpumask == NULL || part->cpt_nodemask == NULL)
+		if (!part->cpt_cpumask || !part->cpt_nodemask)
 			goto failed;
 	}
 
@@ -618,7 +618,7 @@ cfs_cpt_choose_ncpus(struct cfs_cpt_table *cptab, int cpt,
 	/* allocate scratch buffer */
 	LIBCFS_ALLOC(socket, cpumask_size());
 	LIBCFS_ALLOC(core, cpumask_size());
-	if (socket == NULL || core == NULL) {
+	if (!socket || !core) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -659,9 +659,9 @@ cfs_cpt_choose_ncpus(struct cfs_cpt_table *cptab, int cpt,
 	}
 
  out:
-	if (socket != NULL)
+	if (socket)
 		LIBCFS_FREE(socket, cpumask_size());
-	if (core != NULL)
+	if (core)
 		LIBCFS_FREE(core, cpumask_size());
 	return rc;
 }
@@ -735,7 +735,7 @@ cfs_cpt_table_create(int ncpt)
 	}
 
 	cptab = cfs_cpt_table_alloc(ncpt);
-	if (cptab == NULL) {
+	if (!cptab) {
 		CERROR("Failed to allocate CPU map(%d)\n", ncpt);
 		goto failed;
 	}
@@ -747,7 +747,7 @@ cfs_cpt_table_create(int ncpt)
 	}
 
 	LIBCFS_ALLOC(mask, cpumask_size());
-	if (mask == NULL) {
+	if (!mask) {
 		CERROR("Failed to allocate scratch cpumask\n");
 		goto failed;
 	}
@@ -793,10 +793,10 @@ cfs_cpt_table_create(int ncpt)
 	CERROR("Failed to setup CPU-partition-table with %d CPU-partitions, online HW nodes: %d, HW cpus: %d.\n",
 	       ncpt, num_online_nodes(), num_online_cpus());
 
-	if (mask != NULL)
+	if (mask)
 		LIBCFS_FREE(mask, cpumask_size());
 
-	if (cptab != NULL)
+	if (cptab)
 		cfs_cpt_table_free(cptab);
 
 	return NULL;
@@ -814,7 +814,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 
 	for (ncpt = 0;; ncpt++) { /* quick scan bracket */
 		str = strchr(str, '[');
-		if (str == NULL)
+		if (!str)
 			break;
 		str++;
 	}
@@ -836,7 +836,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 	high = node ? MAX_NUMNODES - 1 : nr_cpu_ids - 1;
 
 	cptab = cfs_cpt_table_alloc(ncpt);
-	if (cptab == NULL) {
+	if (!cptab) {
 		CERROR("Failed to allocate cpu partition table\n");
 		return NULL;
 	}
@@ -850,7 +850,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 		int			i;
 		int			n;
 
-		if (bracket == NULL) {
+		if (!bracket) {
 			if (*str != 0) {
 				CERROR("Invalid pattern %s\n", str);
 				goto failed;
@@ -885,7 +885,7 @@ cfs_cpt_table_create_pattern(char *pattern)
 		}
 
 		bracket = strchr(str, ']');
-		if (bracket == NULL) {
+		if (!bracket) {
 			CERROR("missing right bracket for cpt %d, %s\n",
 			       cpt, str);
 			goto failed;
@@ -975,25 +975,25 @@ static struct notifier_block cfs_cpu_notifier = {
 void
 cfs_cpu_fini(void)
 {
-	if (cfs_cpt_table != NULL)
+	if (cfs_cpt_table)
 		cfs_cpt_table_free(cfs_cpt_table);
 
 #ifdef CONFIG_HOTPLUG_CPU
 	unregister_hotcpu_notifier(&cfs_cpu_notifier);
 #endif
-	if (cpt_data.cpt_cpumask != NULL)
+	if (cpt_data.cpt_cpumask)
 		LIBCFS_FREE(cpt_data.cpt_cpumask, cpumask_size());
 }
 
 int
 cfs_cpu_init(void)
 {
-	LASSERT(cfs_cpt_table == NULL);
+	LASSERT(!cfs_cpt_table);
 
 	memset(&cpt_data, 0, sizeof(cpt_data));
 
 	LIBCFS_ALLOC(cpt_data.cpt_cpumask, cpumask_size());
-	if (cpt_data.cpt_cpumask == NULL) {
+	if (!cpt_data.cpt_cpumask) {
 		CERROR("Failed to allocate scratch buffer\n");
 		return -1;
 	}
@@ -1007,7 +1007,7 @@ cfs_cpu_init(void)
 
 	if (*cpu_pattern != 0) {
 		cfs_cpt_table = cfs_cpt_table_create_pattern(cpu_pattern);
-		if (cfs_cpt_table == NULL) {
+		if (!cfs_cpt_table) {
 			CERROR("Failed to create cptab from pattern %s\n",
 			       cpu_pattern);
 			goto failed;
@@ -1015,7 +1015,7 @@ cfs_cpu_init(void)
 
 	} else {
 		cfs_cpt_table = cfs_cpt_table_create(cpu_npartitions);
-		if (cfs_cpt_table == NULL) {
+		if (!cfs_cpt_table) {
 			CERROR("Failed to create ptable with npartitions %d\n",
 			       cpu_npartitions);
 			goto failed;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index 079d50e..ccc25cd 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -45,14 +45,14 @@ static int cfs_crypto_hash_alloc(unsigned char alg_id,
 
 	*type = cfs_crypto_hash_type(alg_id);
 
-	if (*type == NULL) {
+	if (!*type) {
 		CWARN("Unsupported hash algorithm id = %d, max id is %d\n",
 		      alg_id, CFS_HASH_ALG_MAX);
 		return -EINVAL;
 	}
 	desc->tfm = crypto_alloc_hash((*type)->cht_name, 0, 0);
 
-	if (desc->tfm == NULL)
+	if (!desc->tfm)
 		return -EINVAL;
 
 	if (IS_ERR(desc->tfm)) {
@@ -69,7 +69,7 @@ static int cfs_crypto_hash_alloc(unsigned char alg_id,
 	 * Skip this function for digest, because we use shash logic at
 	 * cfs_crypto_hash_alloc.
 	 */
-	if (key != NULL)
+	if (key)
 		err = crypto_hash_setkey(desc->tfm, key, key_len);
 	else if ((*type)->cht_key != 0)
 		err = crypto_hash_setkey(desc->tfm,
@@ -99,14 +99,14 @@ int cfs_crypto_hash_digest(unsigned char alg_id,
 	int			err;
 	const struct cfs_crypto_hash_type	*type;
 
-	if (buf == NULL || buf_len == 0 || hash_len == NULL)
+	if (!buf || buf_len == 0 || !hash_len)
 		return -EINVAL;
 
 	err = cfs_crypto_hash_alloc(alg_id, &type, &hdesc, key, key_len);
 	if (err != 0)
 		return err;
 
-	if (hash == NULL || *hash_len < type->cht_size) {
+	if (!hash || *hash_len < type->cht_size) {
 		*hash_len = type->cht_size;
 		crypto_free_hash(hdesc.tfm);
 		return -ENOSPC;
@@ -131,7 +131,7 @@ struct cfs_crypto_hash_desc *
 	const struct cfs_crypto_hash_type       *type;
 
 	hdesc = kmalloc(sizeof(*hdesc), 0);
-	if (hdesc == NULL)
+	if (!hdesc)
 		return ERR_PTR(-ENOMEM);
 
 	err = cfs_crypto_hash_alloc(alg_id, &type, hdesc, key, key_len);
@@ -175,12 +175,12 @@ int cfs_crypto_hash_final(struct cfs_crypto_hash_desc *hdesc,
 	int     err;
 	int     size = crypto_hash_digestsize(((struct hash_desc *)hdesc)->tfm);
 
-	if (hash_len == NULL) {
+	if (!hash_len) {
 		crypto_free_hash(((struct hash_desc *)hdesc)->tfm);
 		kfree(hdesc);
 		return 0;
 	}
-	if (hash == NULL || *hash_len < size) {
+	if (!hash || *hash_len < size) {
 		*hash_len = size;
 		return -ENOSPC;
 	}
@@ -253,7 +253,7 @@ static int cfs_crypto_test_hashes(void)
 	unsigned int	    data_len = 1 * 128 * 1024;
 
 	data = kmalloc(data_len, 0);
-	if (data == NULL) {
+	if (!data) {
 		CERROR("Failed to allocate mem\n");
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 3358c3b..85deec9 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -80,7 +80,7 @@ void libcfs_run_debug_log_upcall(char *file)
 
 	argv[0] = lnet_debug_log_upcall;
 
-	LASSERTF(file != NULL, "called on a null filename\n");
+	LASSERTF(file, "called on a null filename\n");
 	argv[1] = file; /* only need to pass the path of the file */
 
 	argv[2] = NULL;
@@ -106,7 +106,7 @@ void libcfs_run_upcall(char **argv)
 
 	argv[0] = lnet_upcall;
 	argc = 1;
-	while (argv[argc] != NULL)
+	while (argv[argc])
 		argc++;
 
 	LASSERT(argc >= 2);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
index e5bc3d3..cbb44d7 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
@@ -102,7 +102,7 @@ libcfs_psdev_open(struct inode *inode, struct file *file)
 
 	if (!inode)
 		return -EINVAL;
-	if (libcfs_psdev_ops.p_open != NULL)
+	if (libcfs_psdev_ops.p_open)
 		rc = libcfs_psdev_ops.p_open(0, NULL);
 	else
 		return -EPERM;
@@ -117,7 +117,7 @@ libcfs_psdev_release(struct inode *inode, struct file *file)
 
 	if (!inode)
 		return -EINVAL;
-	if (libcfs_psdev_ops.p_close != NULL)
+	if (libcfs_psdev_ops.p_close)
 		rc = libcfs_psdev_ops.p_close(0, NULL);
 	else
 		rc = -EPERM;
@@ -150,7 +150,7 @@ static long libcfs_ioctl(struct file *file,
 		return 0;
 	}
 
-	if (libcfs_psdev_ops.p_ioctl != NULL)
+	if (libcfs_psdev_ops.p_ioctl)
 		rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void __user *)arg);
 	else
 		rc = -EPERM;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 64a136c..89944c0 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -63,7 +63,7 @@ int cfs_tracefile_init_arch(void)
 		cfs_trace_data[i] =
 			kmalloc(sizeof(union cfs_trace_data_union) *
 				num_possible_cpus(), GFP_KERNEL);
-		if (cfs_trace_data[i] == NULL)
+		if (!cfs_trace_data[i])
 			goto out;
 
 	}
@@ -82,7 +82,7 @@ int cfs_tracefile_init_arch(void)
 				kmalloc(CFS_TRACE_CONSOLE_BUFFER_SIZE,
 					GFP_KERNEL);
 
-			if (cfs_trace_console_buffers[i][j] == NULL)
+			if (!cfs_trace_console_buffers[i][j])
 				goto out;
 		}
 
@@ -105,7 +105,7 @@ void cfs_tracefile_fini_arch(void)
 			cfs_trace_console_buffers[i][j] = NULL;
 		}
 
-	for (i = 0; cfs_trace_data[i] != NULL; i++) {
+	for (i = 0; cfs_trace_data[i]; i++) {
 		kfree(cfs_trace_data[i]);
 		cfs_trace_data[i] = NULL;
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index 45838b5..cf1498a 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -129,7 +129,7 @@ static int libcfs_ioctl_int(struct cfs_psdev_file *pfile, unsigned long cmd,
 	 * Handled in arch/cfs_module.c
 	 */
 	case IOC_LIBCFS_MARK_DEBUG:
-		if (data->ioc_inlbuf1 == NULL ||
+		if (!data->ioc_inlbuf1 ||
 		    data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0')
 			return -EINVAL;
 		libcfs_debug_mark_buffer(data->ioc_inlbuf1);
@@ -165,7 +165,7 @@ static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd,
 	int err = 0;
 
 	LIBCFS_ALLOC_GFP(buf, 1024, GFP_KERNEL);
-	if (buf == NULL)
+	if (!buf)
 		return -ENOMEM;
 
 	/* 'cmd' and permissions get checked in our arch-specific caller */
@@ -329,11 +329,11 @@ static int __proc_cpt_table(void *data, int write,
 	if (write)
 		return -EPERM;
 
-	LASSERT(cfs_cpt_table != NULL);
+	LASSERT(cfs_cpt_table);
 
 	while (1) {
 		LIBCFS_ALLOC(buf, len);
-		if (buf == NULL)
+		if (!buf)
 			return -ENOMEM;
 
 		rc = cfs_cpt_table_print(cfs_cpt_table, buf, len);
@@ -355,7 +355,7 @@ static int __proc_cpt_table(void *data, int write,
 
 	rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
  out:
-	if (buf != NULL)
+	if (buf)
 		LIBCFS_FREE(buf, len);
 	return rc;
 }
@@ -531,7 +531,7 @@ static const struct file_operations *lnet_debugfs_fops_select(umode_t mode)
 void lustre_insert_debugfs(struct ctl_table *table,
 			   const struct lnet_debugfs_symlink_def *symlinks)
 {
-	if (lnet_debugfs_root == NULL)
+	if (!lnet_debugfs_root)
 		lnet_debugfs_root = debugfs_create_dir("lnet", NULL);
 
 	/* Even if we cannot create, just ignore it altogether) */
@@ -555,8 +555,7 @@ EXPORT_SYMBOL_GPL(lustre_insert_debugfs);
 
 static void lustre_remove_debugfs(void)
 {
-	if (lnet_debugfs_root != NULL)
-		debugfs_remove_recursive(lnet_debugfs_root);
+	debugfs_remove_recursive(lnet_debugfs_root);
 
 	lnet_debugfs_root = NULL;
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index a7d9b78..c8f6a07 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -80,11 +80,11 @@ static struct cfs_trace_page *cfs_tage_alloc(gfp_t gfp)
 	 */
 	gfp |= __GFP_NOWARN;
 	page = alloc_page(gfp);
-	if (page == NULL)
+	if (!page)
 		return NULL;
 
 	tage = kmalloc(sizeof(*tage), gfp);
-	if (tage == NULL) {
+	if (!tage) {
 		__free_page(page);
 		return NULL;
 	}
@@ -96,9 +96,6 @@ static struct cfs_trace_page *cfs_tage_alloc(gfp_t gfp)
 
 static void cfs_tage_free(struct cfs_trace_page *tage)
 {
-	__LASSERT(tage != NULL);
-	__LASSERT(tage->page != NULL);
-
 	__free_page(tage->page);
 	kfree(tage);
 	atomic_dec(&cfs_tage_allocated);
@@ -107,9 +104,6 @@ static void cfs_tage_free(struct cfs_trace_page *tage)
 static void cfs_tage_to_tail(struct cfs_trace_page *tage,
 			     struct list_head *queue)
 {
-	__LASSERT(tage != NULL);
-	__LASSERT(queue != NULL);
-
 	list_move_tail(&tage->linkage, queue);
 }
 
@@ -127,7 +121,7 @@ int cfs_trace_refill_stock(struct cfs_trace_cpu_data *tcd, gfp_t gfp,
 		struct cfs_trace_page *tage;
 
 		tage = cfs_tage_alloc(gfp);
-		if (tage == NULL)
+		if (!tage)
 			break;
 		list_add_tail(&tage->linkage, stock);
 	}
@@ -154,7 +148,7 @@ cfs_trace_get_tage_try(struct cfs_trace_cpu_data *tcd, unsigned long len)
 			list_del_init(&tage->linkage);
 		} else {
 			tage = cfs_tage_alloc(GFP_ATOMIC);
-			if (unlikely(tage == NULL)) {
+			if (unlikely(!tage)) {
 				if ((!memory_pressure_get() ||
 				     in_interrupt()) && printk_ratelimit())
 					printk(KERN_WARNING
@@ -227,7 +221,7 @@ static struct cfs_trace_page *cfs_trace_get_tage(struct cfs_trace_cpu_data *tcd,
 	}
 
 	tage = cfs_trace_get_tage_try(tcd, len);
-	if (tage != NULL)
+	if (tage)
 		return tage;
 	if (thread_running)
 		cfs_tcd_shrink(tcd);
@@ -281,7 +275,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	 * warning on Linux when debugging is enabled. */
 	cfs_set_ptldebug_header(&header, msgdata, CDEBUG_STACK());
 
-	if (tcd == NULL)		/* arch may not log in IRQ context */
+	if (!tcd)		/* arch may not log in IRQ context */
 		goto console;
 
 	if (tcd->tcd_cur_pages == 0)
@@ -308,7 +302,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	 */
 	for (i = 0; i < 2; i++) {
 		tage = cfs_trace_get_tage(tcd, needed + known_size + 1);
-		if (tage == NULL) {
+		if (!tage) {
 			if (needed + known_size > PAGE_CACHE_SIZE)
 				mask |= D_ERROR;
 
@@ -389,18 +383,18 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 console:
 	if ((mask & libcfs_printk) == 0) {
 		/* no console output requested */
-		if (tcd != NULL)
+		if (tcd)
 			cfs_trace_put_tcd(tcd);
 		return 1;
 	}
 
-	if (cdls != NULL) {
+	if (cdls) {
 		if (libcfs_console_ratelimit &&
 		    cdls->cdls_next != 0 &&     /* not first time ever */
 		    !cfs_time_after(cfs_time_current(), cdls->cdls_next)) {
 			/* skipping a console message */
 			cdls->cdls_count++;
-			if (tcd != NULL)
+			if (tcd)
 				cfs_trace_put_tcd(tcd);
 			return 1;
 		}
@@ -423,7 +417,7 @@ console:
 		cdls->cdls_next = (cfs_time_current() + cdls->cdls_delay) | 1;
 	}
 
-	if (tcd != NULL) {
+	if (tcd) {
 		cfs_print_to_console(&header, mask, string_buf, needed, file,
 				     msgdata->msg_fn);
 		cfs_trace_put_tcd(tcd);
@@ -431,14 +425,14 @@ console:
 		string_buf = cfs_trace_get_console_buffer();
 
 		needed = 0;
-		if (format1 != NULL) {
+		if (format1) {
 			va_copy(ap, args);
 			needed = vsnprintf(string_buf,
 					   CFS_TRACE_CONSOLE_BUFFER_SIZE,
 					   format1, ap);
 			va_end(ap);
 		}
-		if (format2 != NULL) {
+		if (format2) {
 			remain = CFS_TRACE_CONSOLE_BUFFER_SIZE - needed;
 			if (remain > 0) {
 				va_start(ap, format2);
@@ -453,7 +447,7 @@ console:
 		put_cpu();
 	}
 
-	if (cdls != NULL && cdls->cdls_count != 0) {
+	if (cdls && cdls->cdls_count != 0) {
 		string_buf = cfs_trace_get_console_buffer();
 
 		needed = snprintf(string_buf, CFS_TRACE_CONSOLE_BUFFER_SIZE,
@@ -783,7 +777,7 @@ int cfs_trace_copyout_string(char __user *usr_buffer, int usr_buffer_nob,
 	if (copy_to_user(usr_buffer, knl_buffer, nob))
 		return -EFAULT;
 
-	if (append != NULL && nob < usr_buffer_nob) {
+	if (append && nob < usr_buffer_nob) {
 		if (copy_to_user(usr_buffer + nob, append, 1))
 			return -EFAULT;
 
@@ -800,7 +794,7 @@ int cfs_trace_allocate_string_buffer(char **str, int nob)
 		return -EINVAL;
 
 	*str = kmalloc(nob, GFP_KERNEL | __GFP_ZERO);
-	if (*str == NULL)
+	if (!*str)
 		return -ENOMEM;
 
 	return 0;
@@ -978,7 +972,7 @@ static int tracefiled(void *arg)
 			}
 		}
 		cfs_tracefile_read_unlock();
-		if (filp == NULL) {
+		if (!filp) {
 			put_pages_on_daemon_list(&pc);
 			__LASSERT(list_empty(&pc.pc_pages));
 			goto end_loop;
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 7bf1471..67a701f 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -185,10 +185,10 @@ union cfs_trace_data_union {
 extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];
 
 #define cfs_tcd_for_each(tcd, i, j)				       \
-    for (i = 0; cfs_trace_data[i] != NULL; i++)			   \
-	for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd);	       \
-	     j < num_possible_cpus();				 \
-	     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
+	for (i = 0; cfs_trace_data[i]; i++)				\
+		for (j = 0, ((tcd) = &(*cfs_trace_data[i])[j].tcd);	\
+		     j < num_possible_cpus();				 \
+		     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
 
 #define cfs_tcd_for_each_type_lock(tcd, i, cpu)			   \
     for (i = 0; cfs_trace_data[i] &&				      \
@@ -308,8 +308,8 @@ do {								    \
 
 #define __LASSERT_TAGE_INVARIANT(tage)				  \
 do {								    \
-	__LASSERT(tage != NULL);					\
-	__LASSERT(tage->page != NULL);				  \
+	__LASSERT(tage);					\
+	__LASSERT(tage->page);				  \
 	__LASSERT(tage->used <= PAGE_CACHE_SIZE);			 \
 	__LASSERT(page_count(tage->page) > 0);		      \
 } while (0)
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 60bb88a..97ae5c1 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -212,7 +212,7 @@ cfs_wi_scheduler (void *arg)
 	cfs_block_allsigs();
 
 	/* CPT affinity scheduler? */
-	if (sched->ws_cptab != NULL)
+	if (sched->ws_cptab)
 		if (cfs_cpt_bind(sched->ws_cptab, sched->ws_cpt) != 0)
 			CWARN("Failed to bind %s on CPT %d\n",
 			      sched->ws_name, sched->ws_cpt);
@@ -343,11 +343,11 @@ cfs_wi_sched_create(char *name, struct cfs_cpt_table *cptab,
 
 	LASSERT(cfs_wi_data.wi_init);
 	LASSERT(!cfs_wi_data.wi_stopping);
-	LASSERT(cptab == NULL || cpt == CFS_CPT_ANY ||
+	LASSERT(!cptab || cpt == CFS_CPT_ANY ||
 		(cpt >= 0 && cpt < cfs_cpt_number(cptab)));
 
 	LIBCFS_ALLOC(sched, sizeof(*sched));
-	if (sched == NULL)
+	if (!sched)
 		return -ENOMEM;
 
 	strlcpy(sched->ws_name, name, CFS_WS_NAME_LEN);
@@ -376,7 +376,7 @@ cfs_wi_sched_create(char *name, struct cfs_cpt_table *cptab,
 		sched->ws_starting++;
 		spin_unlock(&cfs_wi_data.wi_glock);
 
-		if (sched->ws_cptab != NULL && sched->ws_cpt >= 0) {
+		if (sched->ws_cptab && sched->ws_cpt >= 0) {
 			snprintf(name, sizeof(name), "%s_%02d_%02u",
 				 sched->ws_name, sched->ws_cpt,
 				 sched->ws_nthreads);
-- 
2.1.0

[PATCH 13/45] staging/lustre/lov: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"
Also removed some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 .../staging/lustre/lustre/lov/lov_cl_internal.h    |  6 +--
 drivers/staging/lustre/lustre/lov/lov_dev.c        | 40 ++++++++---------
 drivers/staging/lustre/lustre/lov/lov_ea.c         |  4 +-
 drivers/staging/lustre/lustre/lov/lov_internal.h   |  1 -
 drivers/staging/lustre/lustre/lov/lov_io.c         | 30 ++++++-------
 drivers/staging/lustre/lustre/lov/lov_lock.c       | 49 ++++++++++-----------
 drivers/staging/lustre/lustre/lov/lov_obd.c        | 44 +++++++++----------
 drivers/staging/lustre/lustre/lov/lov_object.c     | 51 +++++++++++-----------
 drivers/staging/lustre/lustre/lov/lov_offset.c     |  5 ---
 drivers/staging/lustre/lustre/lov/lov_pack.c       |  8 ++--
 drivers/staging/lustre/lustre/lov/lov_page.c       |  6 +--
 drivers/staging/lustre/lustre/lov/lov_pool.c       | 20 ++++-----
 drivers/staging/lustre/lustre/lov/lov_request.c    | 30 ++++++-------
 drivers/staging/lustre/lustre/lov/lovsub_dev.c     |  5 +--
 drivers/staging/lustre/lustre/lov/lovsub_lock.c    |  4 +-
 drivers/staging/lustre/lustre/lov/lovsub_object.c  |  4 +-
 drivers/staging/lustre/lustre/lov/lproc_lov.c      | 18 ++++----
 17 files changed, 152 insertions(+), 173 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lov/lov_cl_internal.h b/drivers/staging/lustre/lustre/lov/lov_cl_internal.h
index 66a2492..b5fc159 100644
--- a/drivers/staging/lustre/lustre/lov/lov_cl_internal.h
+++ b/drivers/staging/lustre/lustre/lov/lov_cl_internal.h
@@ -651,7 +651,7 @@ static inline struct lov_session *lov_env_session(const struct lu_env *env)
 	struct lov_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &lov_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
@@ -759,7 +759,7 @@ static inline struct lovsub_lock *cl2sub_lock(const struct cl_lock *lock)
 	const struct cl_lock_slice *slice;
 
 	slice = cl_lock_at(lock, &lovsub_device_type);
-	LASSERT(slice != NULL);
+	LASSERT(slice);
 	return cl2lovsub_lock(slice);
 }
 
@@ -817,7 +817,7 @@ static inline struct lov_thread_info *lov_env_info(const struct lu_env *env)
 	struct lov_thread_info *info;
 
 	info = lu_context_key_get(&env->le_ctx, &lov_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
diff --git a/drivers/staging/lustre/lustre/lov/lov_dev.c b/drivers/staging/lustre/lustre/lov/lov_dev.c
index 2c33cbc..ee093e0 100644
--- a/drivers/staging/lustre/lustre/lov/lov_dev.c
+++ b/drivers/staging/lustre/lustre/lov/lov_dev.c
@@ -143,7 +143,7 @@ static void *lov_key_init(const struct lu_context *ctx,
 	struct lov_thread_info *info;
 
 	info = kmem_cache_alloc(lov_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info != NULL)
+	if (info)
 		INIT_LIST_HEAD(&info->lti_closure.clc_list);
 	else
 		info = ERR_PTR(-ENOMEM);
@@ -171,7 +171,7 @@ static void *lov_session_key_init(const struct lu_context *ctx,
 	struct lov_session *info;
 
 	info = kmem_cache_alloc(lov_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -199,15 +199,15 @@ static struct lu_device *lov_device_fini(const struct lu_env *env,
 	int i;
 	struct lov_device *ld = lu2lov_dev(d);
 
-	LASSERT(ld->ld_lov != NULL);
-	if (ld->ld_target == NULL)
+	LASSERT(ld->ld_lov);
+	if (!ld->ld_target)
 		return NULL;
 
 	lov_foreach_target(ld, i) {
 		struct lovsub_device *lsd;
 
 		lsd = ld->ld_target[i];
-		if (lsd != NULL) {
+		if (lsd) {
 			cl_stack_fini(env, lovsub2cl_dev(lsd));
 			ld->ld_target[i] = NULL;
 		}
@@ -222,8 +222,8 @@ static int lov_device_init(const struct lu_env *env, struct lu_device *d,
 	int i;
 	int rc = 0;
 
-	LASSERT(d->ld_site != NULL);
-	if (ld->ld_target == NULL)
+	LASSERT(d->ld_site);
+	if (!ld->ld_target)
 		return rc;
 
 	lov_foreach_target(ld, i) {
@@ -232,7 +232,7 @@ static int lov_device_init(const struct lu_env *env, struct lu_device *d,
 		struct lov_tgt_desc  *desc;
 
 		desc = ld->ld_lov->lov_tgts[i];
-		if (desc == NULL)
+		if (!desc)
 			continue;
 
 		cl = cl_type_setup(env, d->ld_site, &lovsub_device_type,
@@ -262,7 +262,7 @@ static int lov_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	lr = kmem_cache_alloc(lov_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lr != NULL) {
+	if (lr) {
 		cl_req_slice_add(req, &lr->lr_cl, dev, &lov_req_ops);
 		result = 0;
 	} else
@@ -282,9 +282,9 @@ static void lov_emerg_free(struct lov_device_emerg **emrg, int nr)
 		struct lov_device_emerg *em;
 
 		em = emrg[i];
-		if (em != NULL) {
+		if (em) {
 			LASSERT(em->emrg_page_list.pl_nr == 0);
-			if (em->emrg_env != NULL)
+			if (em->emrg_env)
 				cl_env_put(em->emrg_env, &em->emrg_refcheck);
 			kfree(em);
 		}
@@ -300,7 +300,7 @@ static struct lu_device *lov_device_free(const struct lu_env *env,
 
 	cl_device_fini(lu2cl_dev(d));
 	kfree(ld->ld_target);
-	if (ld->ld_emrg != NULL)
+	if (ld->ld_emrg)
 		lov_emerg_free(ld->ld_emrg, nr);
 	kfree(ld);
 	return NULL;
@@ -311,7 +311,7 @@ static void lov_cl_del_target(const struct lu_env *env, struct lu_device *dev,
 {
 	struct lov_device *ld = lu2lov_dev(dev);
 
-	if (ld->ld_target[index] != NULL) {
+	if (ld->ld_target[index]) {
 		cl_stack_fini(env, lovsub2cl_dev(ld->ld_target[index]));
 		ld->ld_target[index] = NULL;
 	}
@@ -324,13 +324,13 @@ static struct lov_device_emerg **lov_emerg_alloc(int nr)
 	int result;
 
 	emerg = kcalloc(nr, sizeof(emerg[0]), GFP_NOFS);
-	if (emerg == NULL)
+	if (!emerg)
 		return ERR_PTR(-ENOMEM);
 	for (result = i = 0; i < nr && result == 0; i++) {
 		struct lov_device_emerg *em;
 
 		em = kzalloc(sizeof(*em), GFP_NOFS);
-		if (em != NULL) {
+		if (em) {
 			emerg[i] = em;
 			cl_page_list_init(&em->emrg_page_list);
 			em->emrg_env = cl_env_alloc(&em->emrg_refcheck,
@@ -370,7 +370,7 @@ static int lov_expand_targets(const struct lu_env *env, struct lov_device *dev)
 			return PTR_ERR(emerg);
 
 		newd = kcalloc(tgt_size, sz, GFP_NOFS);
-		if (newd != NULL) {
+		if (newd) {
 			mutex_lock(&dev->ld_mutex);
 			if (sub_size > 0) {
 				memcpy(newd, dev->ld_target, sub_size * sz);
@@ -379,7 +379,7 @@ static int lov_expand_targets(const struct lu_env *env, struct lov_device *dev)
 			dev->ld_target    = newd;
 			dev->ld_target_nr = tgt_size;
 
-			if (dev->ld_emrg != NULL)
+			if (dev->ld_emrg)
 				lov_emerg_free(dev->ld_emrg, sub_size);
 			dev->ld_emrg = emerg;
 			mutex_unlock(&dev->ld_mutex);
@@ -404,8 +404,6 @@ static int lov_cl_add_target(const struct lu_env *env, struct lu_device *dev,
 	obd_getref(obd);
 
 	tgt = obd->u.lov.lov_tgts[index];
-	LASSERT(tgt != NULL);
-	LASSERT(tgt->ltd_obd != NULL);
 
 	if (!tgt->ltd_obd->obd_set_up) {
 		CERROR("Target %s not set up\n", obd_uuid2str(&tgt->ltd_uuid));
@@ -414,7 +412,7 @@ static int lov_cl_add_target(const struct lu_env *env, struct lu_device *dev,
 
 	rc = lov_expand_targets(env, ld);
 	if (rc == 0 && ld->ld_flags & LOV_DEV_INITIALIZED) {
-		LASSERT(dev->ld_site != NULL);
+		LASSERT(dev->ld_site);
 
 		cl = cl_type_setup(env, dev->ld_site, &lovsub_device_type,
 				   tgt->ltd_obd->obd_lu_dev);
@@ -492,7 +490,7 @@ static struct lu_device *lov_device_alloc(const struct lu_env *env,
 
 	/* setup the LOV OBD */
 	obd = class_name2obd(lustre_cfg_string(cfg, 0));
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lov_setup(obd, cfg);
 	if (rc) {
 		lov_device_free(env, d);
diff --git a/drivers/staging/lustre/lustre/lov/lov_ea.c b/drivers/staging/lustre/lustre/lov/lov_ea.c
index b3c9c85..6c8381a 100644
--- a/drivers/staging/lustre/lustre/lov/lov_ea.c
+++ b/drivers/staging/lustre/lustre/lov/lov_ea.c
@@ -101,7 +101,7 @@ struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
 
 	for (i = 0; i < stripe_count; i++) {
 		loi = kmem_cache_alloc(lov_oinfo_slab, GFP_NOFS | __GFP_ZERO);
-		if (loi == NULL)
+		if (!loi)
 			goto err;
 		lsm->lsm_oinfo[i] = loi;
 	}
@@ -167,7 +167,7 @@ static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
 {
 	struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
 
-	if (imp == NULL || !tgt->ltd_active) {
+	if (!imp || !tgt->ltd_active) {
 		*stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
 		return;
 	}
diff --git a/drivers/staging/lustre/lustre/lov/lov_internal.h b/drivers/staging/lustre/lustre/lov/lov_internal.h
index f8e92fe..d4522ba 100644
--- a/drivers/staging/lustre/lustre/lov/lov_internal.h
+++ b/drivers/staging/lustre/lustre/lov/lov_internal.h
@@ -114,7 +114,6 @@ void lov_finish_set(struct lov_request_set *set);
 
 static inline void lov_get_reqset(struct lov_request_set *set)
 {
-	LASSERT(set != NULL);
 	LASSERT(atomic_read(&set->set_refcount) > 0);
 	atomic_inc(&set->set_refcount);
 }
diff --git a/drivers/staging/lustre/lustre/lov/lov_io.c b/drivers/staging/lustre/lustre/lov/lov_io.c
index 93fe69e..50954ce 100644
--- a/drivers/staging/lustre/lustre/lov/lov_io.c
+++ b/drivers/staging/lustre/lustre/lov/lov_io.c
@@ -60,7 +60,7 @@ static inline void lov_sub_exit(struct lov_io_sub *sub)
 static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
 			    struct lov_io_sub *sub)
 {
-	if (sub->sub_io != NULL) {
+	if (sub->sub_io) {
 		if (sub->sub_io_initialized) {
 			lov_sub_enter(sub);
 			cl_io_fini(sub->sub_env, sub->sub_io);
@@ -74,7 +74,7 @@ static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
 			kfree(sub->sub_io);
 		sub->sub_io = NULL;
 	}
-	if (sub->sub_env != NULL && !IS_ERR(sub->sub_env)) {
+	if (!IS_ERR_OR_NULL(sub->sub_env)) {
 		if (!sub->sub_borrowed)
 			cl_env_put(sub->sub_env, &sub->sub_refcheck);
 		sub->sub_env = NULL;
@@ -143,11 +143,11 @@ static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
 	int stripe = sub->sub_stripe;
 	int result;
 
-	LASSERT(sub->sub_io == NULL);
-	LASSERT(sub->sub_env == NULL);
+	LASSERT(!sub->sub_io);
+	LASSERT(!sub->sub_env);
 	LASSERT(sub->sub_stripe < lio->lis_stripe_count);
 
-	if (unlikely(lov_r0(lov)->lo_sub[stripe] == NULL))
+	if (unlikely(!lov_r0(lov)->lo_sub[stripe]))
 		return -EIO;
 
 	result = 0;
@@ -252,7 +252,6 @@ static int lov_page_stripe(const struct cl_page *page)
 	subobj = lu2lovsub(
 		lu_object_locate(page->cp_child->cp_obj->co_lu.lo_header,
 				 &lovsub_device_type));
-	LASSERT(subobj != NULL);
 	return subobj->lso_index;
 }
 
@@ -263,9 +262,9 @@ struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
 	struct cl_page       *page = slice->cpl_page;
 	int stripe;
 
-	LASSERT(lio->lis_cl.cis_io != NULL);
+	LASSERT(lio->lis_cl.cis_io);
 	LASSERT(cl2lov(slice->cpl_obj) == lio->lis_object);
-	LASSERT(lsm != NULL);
+	LASSERT(lsm);
 	LASSERT(lio->lis_nr_subios > 0);
 
 	stripe = lov_page_stripe(page);
@@ -278,7 +277,7 @@ static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
 	struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
 	int result;
 
-	LASSERT(lio->lis_object != NULL);
+	LASSERT(lio->lis_object);
 
 	/*
 	 * Need to be optimized, we can't afford to allocate a piece of memory
@@ -288,7 +287,7 @@ static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
 		libcfs_kvzalloc(lsm->lsm_stripe_count *
 				sizeof(lio->lis_subs[0]),
 				GFP_NOFS);
-	if (lio->lis_subs != NULL) {
+	if (lio->lis_subs) {
 		lio->lis_nr_subios = lio->lis_stripe_count;
 		lio->lis_single_subio_index = -1;
 		lio->lis_active_subios = 0;
@@ -304,7 +303,6 @@ static void lov_io_slice_init(struct lov_io *lio,
 	io->ci_result = 0;
 	lio->lis_object = obj;
 
-	LASSERT(obj->lo_lsm != NULL);
 	lio->lis_stripe_count = obj->lo_lsm->lsm_stripe_count;
 
 	switch (io->ci_type) {
@@ -358,7 +356,7 @@ static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
 	struct lov_object *lov = cl2lov(ios->cis_obj);
 	int i;
 
-	if (lio->lis_subs != NULL) {
+	if (lio->lis_subs) {
 		for (i = 0; i < lio->lis_nr_subios; i++)
 			lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
 		kvfree(lio->lis_subs);
@@ -395,7 +393,7 @@ static int lov_io_iter_init(const struct lu_env *env,
 					   endpos, &start, &end))
 			continue;
 
-		if (unlikely(lov_r0(lio->lis_object)->lo_sub[stripe] == NULL)) {
+		if (unlikely(!lov_r0(lio->lis_object)->lo_sub[stripe])) {
 			if (ios->cis_io->ci_type == CIT_READ ||
 			    ios->cis_io->ci_type == CIT_WRITE ||
 			    ios->cis_io->ci_type == CIT_FAULT)
@@ -601,13 +599,13 @@ static int lov_io_submit(const struct lu_env *env,
 		return rc;
 	}
 
-	LASSERT(lio->lis_subs != NULL);
+	LASSERT(lio->lis_subs);
 	if (alloc) {
 		stripes_qin =
 			libcfs_kvzalloc(sizeof(*stripes_qin) *
 					lio->lis_nr_subios,
 					GFP_NOFS);
-		if (stripes_qin == NULL)
+		if (!stripes_qin)
 			return -ENOMEM;
 
 		for (stripe = 0; stripe < lio->lis_nr_subios; stripe++)
@@ -955,7 +953,7 @@ int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
 	struct lov_io *lio = lov_env_io(env);
 	int result;
 
-	LASSERT(lov->lo_lsm != NULL);
+	LASSERT(lov->lo_lsm);
 	lio->lis_object = lov;
 
 	switch (io->ci_type) {
diff --git a/drivers/staging/lustre/lustre/lov/lov_lock.c b/drivers/staging/lustre/lustre/lov/lov_lock.c
index 36615da..e6b0437 100644
--- a/drivers/staging/lustre/lustre/lov/lov_lock.c
+++ b/drivers/staging/lustre/lustre/lov/lov_lock.c
@@ -115,7 +115,7 @@ static void lov_sublock_adopt(const struct lu_env *env, struct lov_lock *lck,
 	/*
 	 * check that sub-lock doesn't have lock link to this top-lock.
 	 */
-	LASSERT(lov_lock_link_find(env, lck, lsl) == NULL);
+	LASSERT(!lov_lock_link_find(env, lck, lsl));
 	LASSERT(idx < lck->lls_nr);
 
 	lck->lls_sub[idx].sub_lock = lsl;
@@ -145,7 +145,7 @@ static struct cl_lock *lov_sublock_alloc(const struct lu_env *env,
 	LASSERT(idx < lck->lls_nr);
 
 	link = kmem_cache_alloc(lov_lock_link_kmem, GFP_NOFS | __GFP_ZERO);
-	if (link != NULL) {
+	if (link) {
 		struct lov_sublock_env *subenv;
 		struct lov_lock_sub  *lls;
 		struct cl_lock_descr *descr;
@@ -220,7 +220,7 @@ static int lov_sublock_lock(const struct lu_env *env,
 			LASSERT(!(lls->sub_flags & LSF_HELD));
 
 			link = lov_lock_link_find(env, lck, sublock);
-			LASSERT(link != NULL);
+			LASSERT(link);
 			lov_lock_unlink(env, link, sublock);
 			lov_sublock_unlock(env, sublock, closure, NULL);
 			lck->lls_cancel_race = 1;
@@ -309,14 +309,14 @@ static int lov_lock_sub_init(const struct lu_env *env,
 		 * XXX for wide striping smarter algorithm is desirable,
 		 * breaking out of the loop, early.
 		 */
-		if (likely(r0->lo_sub[i] != NULL) &&
+		if (likely(r0->lo_sub[i]) &&
 		    lov_stripe_intersects(loo->lo_lsm, i,
 					  file_start, file_end, &start, &end))
 			nr++;
 	}
 	LASSERT(nr > 0);
 	lck->lls_sub = libcfs_kvzalloc(nr * sizeof(lck->lls_sub[0]), GFP_NOFS);
-	if (lck->lls_sub == NULL)
+	if (!lck->lls_sub)
 		return -ENOMEM;
 
 	lck->lls_nr = nr;
@@ -328,14 +328,14 @@ static int lov_lock_sub_init(const struct lu_env *env,
 	 * top-lock.
 	 */
 	for (i = 0, nr = 0; i < r0->lo_nr; ++i) {
-		if (likely(r0->lo_sub[i] != NULL) &&
+		if (likely(r0->lo_sub[i]) &&
 		    lov_stripe_intersects(loo->lo_lsm, i,
 					  file_start, file_end, &start, &end)) {
 			struct cl_lock_descr *descr;
 
 			descr = &lck->lls_sub[nr].sub_descr;
 
-			LASSERT(descr->cld_obj == NULL);
+			LASSERT(!descr->cld_obj);
 			descr->cld_obj   = lovsub2cl(r0->lo_sub[i]);
 			descr->cld_start = cl_index(descr->cld_obj, start);
 			descr->cld_end   = cl_index(descr->cld_obj, end);
@@ -369,7 +369,6 @@ static int lov_sublock_release(const struct lu_env *env, struct lov_lock *lck,
 		struct cl_lock    *sublock;
 		int dying;
 
-		LASSERT(lck->lls_sub[i].sub_lock != NULL);
 		sublock = lck->lls_sub[i].sub_lock->lss_cl.cls_lock;
 		LASSERT(cl_lock_is_mutexed(sublock));
 
@@ -413,7 +412,6 @@ static void lov_sublock_hold(const struct lu_env *env, struct lov_lock *lck,
 	if (!(lck->lls_sub[i].sub_flags & LSF_HELD)) {
 		struct cl_lock *sublock;
 
-		LASSERT(lck->lls_sub[i].sub_lock != NULL);
 		sublock = lck->lls_sub[i].sub_lock->lss_cl.cls_lock;
 		LASSERT(cl_lock_is_mutexed(sublock));
 		LASSERT(sublock->cll_state != CLS_FREEING);
@@ -435,13 +433,13 @@ static void lov_lock_fini(const struct lu_env *env,
 
 	lck = cl2lov_lock(slice);
 	LASSERT(lck->lls_nr_filled == 0);
-	if (lck->lls_sub != NULL) {
+	if (lck->lls_sub) {
 		for (i = 0; i < lck->lls_nr; ++i)
 			/*
 			 * No sub-locks exists at this point, as sub-lock has
 			 * a reference on its parent.
 			 */
-			LASSERT(lck->lls_sub[i].sub_lock == NULL);
+			LASSERT(!lck->lls_sub[i].sub_lock);
 		kvfree(lck->lls_sub);
 	}
 	kmem_cache_free(lov_lock_kmem, lck);
@@ -515,7 +513,7 @@ static int lov_sublock_fill(const struct lu_env *env, struct cl_lock *parent,
 	if (!IS_ERR(sublock)) {
 		cl_lock_get_trust(sublock);
 		if (parent->cll_state == CLS_QUEUING &&
-		    lck->lls_sub[idx].sub_lock == NULL) {
+		    !lck->lls_sub[idx].sub_lock) {
 			lov_sublock_adopt(env, lck, sublock, idx, link);
 		} else {
 			kmem_cache_free(lov_lock_link_kmem, link);
@@ -574,7 +572,7 @@ static int lov_lock_enqueue(const struct lu_env *env,
 		 * Sub-lock might have been canceled, while top-lock was
 		 * cached.
 		 */
-		if (sub == NULL) {
+		if (!sub) {
 			result = lov_sublock_fill(env, lock, io, lck, i);
 			/* lov_sublock_fill() released @lock mutex,
 			 * restart. */
@@ -620,7 +618,7 @@ static int lov_lock_enqueue(const struct lu_env *env,
 					break;
 				}
 			} else {
-				LASSERT(sublock->cll_conflict == NULL);
+				LASSERT(!sublock->cll_conflict);
 				lov_sublock_unlock(env, sub, closure, subenv);
 			}
 		}
@@ -653,7 +651,7 @@ static int lov_lock_unuse(const struct lu_env *env,
 		LASSERT(slice->cls_lock->cll_state == CLS_INTRANSIT);
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		if (sub == NULL)
+		if (!sub)
 			continue;
 
 		sublock = sub->lss_cl.cls_lock;
@@ -698,7 +696,7 @@ static void lov_lock_cancel(const struct lu_env *env,
 		 * to the completion. */
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		if (sub == NULL)
+		if (!sub)
 			continue;
 
 		sublock = sub->lss_cl.cls_lock;
@@ -757,7 +755,6 @@ again:
 
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		LASSERT(sub != NULL);
 		sublock = sub->lss_cl.cls_lock;
 		rc = lov_sublock_lock(env, lck, lls, closure, &subenv);
 		if (rc == 0) {
@@ -805,7 +802,7 @@ static int lov_lock_use(const struct lu_env *env,
 
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		if (sub == NULL) {
+		if (!sub) {
 			/*
 			 * Sub-lock might have been canceled, while top-lock was
 			 * cached.
@@ -883,10 +880,10 @@ static int lov_lock_stripe_is_matching(const struct lu_env *env,
 
 		idx = lov_stripe_number(lsm, start);
 		if (idx == stripe ||
-		    unlikely(lov_r0(lov)->lo_sub[idx] == NULL)) {
+		    unlikely(!lov_r0(lov)->lo_sub[idx])) {
 			idx = lov_stripe_number(lsm, end);
 			if (idx == stripe ||
-			    unlikely(lov_r0(lov)->lo_sub[idx] == NULL))
+			    unlikely(!lov_r0(lov)->lo_sub[idx]))
 				result = 1;
 		}
 	}
@@ -1035,7 +1032,7 @@ static void lov_lock_delete(const struct lu_env *env,
 		struct lov_lock_sub *lls = &lck->lls_sub[i];
 		struct lovsub_lock  *lsl = lls->sub_lock;
 
-		if (lsl == NULL) /* already removed */
+		if (!lsl) /* already removed */
 			continue;
 
 		rc = lov_sublock_lock(env, lck, lls, closure, NULL);
@@ -1051,9 +1048,9 @@ static void lov_lock_delete(const struct lu_env *env,
 			lov_sublock_release(env, lck, i, 1, 0);
 
 		link = lov_lock_link_find(env, lck, lsl);
-		LASSERT(link != NULL);
+		LASSERT(link);
 		lov_lock_unlink(env, link, lsl);
-		LASSERT(lck->lls_sub[i].sub_lock == NULL);
+		LASSERT(!lck->lls_sub[i].sub_lock);
 
 		lov_sublock_unlock(env, lsl, closure, NULL);
 	}
@@ -1073,7 +1070,7 @@ static int lov_lock_print(const struct lu_env *env, void *cookie,
 
 		sub = &lck->lls_sub[i];
 		(*p)(env, cookie, "    %d %x: ", i, sub->sub_flags);
-		if (sub->sub_lock != NULL)
+		if (sub->sub_lock)
 			cl_lock_print(env, cookie, p,
 				      sub->sub_lock->lss_cl.cls_lock);
 		else
@@ -1101,7 +1098,7 @@ int lov_lock_init_raid0(const struct lu_env *env, struct cl_object *obj,
 	int result;
 
 	lck = kmem_cache_alloc(lov_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lck != NULL) {
+	if (lck) {
 		cl_lock_slice_add(lock, &lck->lls_cl, obj, &lov_lock_ops);
 		result = lov_lock_sub_init(env, lck, io);
 	} else
@@ -1137,7 +1134,7 @@ int lov_lock_init_empty(const struct lu_env *env, struct cl_object *obj,
 	int result = -ENOMEM;
 
 	lck = kmem_cache_alloc(lov_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lck != NULL) {
+	if (lck) {
 		cl_lock_slice_add(lock, &lck->lls_cl, obj, &lov_empty_lock_ops);
 		lck->lls_orig = lock->cll_descr;
 		result = 0;
diff --git a/drivers/staging/lustre/lustre/lov/lov_obd.c b/drivers/staging/lustre/lustre/lov/lov_obd.c
index 65077b7..2b7b8ce 100644
--- a/drivers/staging/lustre/lustre/lov/lov_obd.c
+++ b/drivers/staging/lustre/lustre/lov/lov_obd.c
@@ -358,7 +358,7 @@ static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 		 * LU-642, initially inactive OSC could miss the obd_connect,
 		 * we make up for it here.
 		 */
-		if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
+		if (ev == OBD_NOTIFY_ACTIVATE && !tgt->ltd_exp &&
 		    obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 			struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 
@@ -521,12 +521,12 @@ static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 
 	tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 					&obd->obd_uuid);
-	if (tgt_obd == NULL)
+	if (!tgt_obd)
 		return -EINVAL;
 
 	mutex_lock(&lov->lov_lock);
 
-	if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
+	if ((index < lov->lov_tgt_size) && lov->lov_tgts[index]) {
 		tgt = lov->lov_tgts[index];
 		CERROR("UUID %s already assigned at LOV target index %d\n",
 		       obd_uuid2str(&tgt->ltd_uuid), index);
@@ -543,7 +543,7 @@ static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		while (newsize < index + 1)
 			newsize <<= 1;
 		newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
-		if (newtgts == NULL) {
+		if (!newtgts) {
 			mutex_unlock(&lov->lov_lock);
 			return -ENOMEM;
 		}
@@ -613,7 +613,7 @@ static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		goto out;
 	}
 
-	if (lov->lov_cache != NULL) {
+	if (lov->lov_cache) {
 		rc = obd_set_info_async(NULL, tgt->ltd_exp,
 				sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 				sizeof(struct cl_client_cache), lov->lov_cache,
@@ -981,7 +981,7 @@ static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 
 	ost_idx = src_oa->o_nlink;
 	lsm = *ea;
-	if (lsm == NULL) {
+	if (!lsm) {
 		rc = -EINVAL;
 		goto out;
 	}
@@ -1025,8 +1025,8 @@ static int lov_create(const struct lu_env *env, struct obd_export *exp,
 	struct lov_obd *lov;
 	int rc = 0;
 
-	LASSERT(ea != NULL);
-	if (exp == NULL)
+	LASSERT(ea);
+	if (!exp)
 		return -EINVAL;
 
 	if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
@@ -1052,7 +1052,7 @@ static int lov_create(const struct lu_env *env, struct obd_export *exp,
 
 #define ASSERT_LSM_MAGIC(lsmp)						  \
 do {									    \
-	LASSERT((lsmp) != NULL);						\
+	LASSERT((lsmp));						\
 	LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||			  \
 		 (lsmp)->lsm_magic == LOV_MAGIC_V3),			    \
 		 "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);	      \
@@ -1105,10 +1105,9 @@ static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
 		}
 	}
 
-	if (rc == 0) {
-		LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
+	if (rc == 0)
 		rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
-	}
+
 	err = lov_fini_destroy_set(set);
 out:
 	obd_putref(exp->exp_obd);
@@ -1174,7 +1173,7 @@ static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
 
 	if (!list_empty(&rqset->set_requests)) {
 		LASSERT(rc == 0);
-		LASSERT(rqset->set_interpret == NULL);
+		LASSERT(!rqset->set_interpret);
 		rqset->set_interpret = lov_getattr_interpret;
 		rqset->set_arg = (void *)lovset;
 		return rc;
@@ -1262,7 +1261,7 @@ static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
 		return rc ? rc : err;
 	}
 
-	LASSERT(rqset->set_interpret == NULL);
+	LASSERT(!rqset->set_interpret);
 	rqset->set_interpret = lov_setattr_interpret;
 	rqset->set_arg = (void *)set;
 
@@ -1330,8 +1329,7 @@ static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
 	struct lov_obd *lov;
 	int rc = 0;
 
-	LASSERT(oinfo != NULL);
-	LASSERT(oinfo->oi_osfs != NULL);
+	LASSERT(oinfo->oi_osfs);
 
 	lov = &obd->u.lov;
 	rc = lov_prep_statfs_set(obd, oinfo, &set);
@@ -1355,7 +1353,7 @@ static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
 		return rc ? rc : err;
 	}
 
-	LASSERT(rqset->set_interpret == NULL);
+	LASSERT(!rqset->set_interpret);
 	rqset->set_interpret = lov_statfs_interpret;
 	rqset->set_arg = (void *)set;
 	return 0;
@@ -1371,7 +1369,7 @@ static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 	/* for obdclass we forbid using obd_statfs_rqset, but prefer using async
 	 * statfs requests */
 	set = ptlrpc_prep_set();
-	if (set == NULL)
+	if (!set)
 		return -ENOMEM;
 
 	oinfo.oi_osfs = osfs;
@@ -1503,7 +1501,7 @@ static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 						     &qctl->obd_uuid))
 					continue;
 
-				if (tgt->ltd_exp == NULL)
+				if (!tgt->ltd_exp)
 					return -EINVAL;
 
 				break;
@@ -1741,7 +1739,7 @@ static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
 		buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
 
 	fm_local = libcfs_kvzalloc(buffer_size, GFP_NOFS);
-	if (fm_local == NULL) {
+	if (!fm_local) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -2072,7 +2070,7 @@ static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	unsigned next_id = 0,  mds_con = 0;
 
 	incr = check_uuid = do_inactive = no_set = 0;
-	if (set == NULL) {
+	if (!set) {
 		no_set = 1;
 		set = ptlrpc_prep_set();
 		if (!set)
@@ -2095,7 +2093,7 @@ static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	} else if (KEY_IS(KEY_MDS_CONN)) {
 		mds_con = 1;
 	} else if (KEY_IS(KEY_CACHE_SET)) {
-		LASSERT(lov->lov_cache == NULL);
+		LASSERT(!lov->lov_cache);
 		lov->lov_cache = val;
 		do_inactive = 1;
 	}
@@ -2329,7 +2327,7 @@ static int __init lov_init(void)
 	lov_oinfo_slab = kmem_cache_create("lov_oinfo",
 					      sizeof(struct lov_oinfo),
 					      0, SLAB_HWCACHE_ALIGN, NULL);
-	if (lov_oinfo_slab == NULL) {
+	if (!lov_oinfo_slab) {
 		lu_kmem_fini(lov_caches);
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/lov/lov_object.c b/drivers/staging/lustre/lustre/lov/lov_object.c
index 3b79ebc..1922e04 100644
--- a/drivers/staging/lustre/lustre/lov/lov_object.c
+++ b/drivers/staging/lustre/lustre/lov/lov_object.c
@@ -154,7 +154,7 @@ static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
 	/* reuse ->coh_attr_guard to protect coh_parent change */
 	spin_lock(&subhdr->coh_attr_guard);
 	parent = subhdr->coh_parent;
-	if (parent == NULL) {
+	if (!parent) {
 		subhdr->coh_parent = hdr;
 		spin_unlock(&subhdr->coh_attr_guard);
 		subhdr->coh_nesting = hdr->coh_nesting + 1;
@@ -170,7 +170,7 @@ static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
 
 		spin_unlock(&subhdr->coh_attr_guard);
 		old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
-		LASSERT(old_obj != NULL);
+		LASSERT(old_obj);
 		old_lov = cl2lov(lu2cl(old_obj));
 		if (old_lov->lo_layout_invalid) {
 			/* the object's layout has already changed but isn't
@@ -212,14 +212,14 @@ static int lov_init_raid0(const struct lu_env *env,
 			 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
 	}
 
-	LASSERT(lov->lo_lsm == NULL);
+	LASSERT(!lov->lo_lsm);
 	lov->lo_lsm = lsm_addref(lsm);
 	r0->lo_nr  = lsm->lsm_stripe_count;
 	LASSERT(r0->lo_nr <= lov_targets_nr(dev));
 
 	r0->lo_sub = libcfs_kvzalloc(r0->lo_nr * sizeof(r0->lo_sub[0]),
 				     GFP_NOFS);
-	if (r0->lo_sub != NULL) {
+	if (r0->lo_sub) {
 		result = 0;
 		subconf->coc_inode = conf->coc_inode;
 		spin_lock_init(&r0->lo_sub_lock);
@@ -241,7 +241,7 @@ static int lov_init_raid0(const struct lu_env *env,
 
 			subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
 			subconf->u.coc_oinfo = oinfo;
-			LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
+			LASSERTF(subdev, "not init ost %d\n", ost_idx);
 			/* In the function below, .hs_keycmp resolves to
 			 * lu_obj_hop_keycmp() */
 			/* coverity[overrun-buffer-val] */
@@ -269,9 +269,9 @@ static int lov_init_released(const struct lu_env *env,
 {
 	struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
 
-	LASSERT(lsm != NULL);
+	LASSERT(lsm);
 	LASSERT(lsm_is_released(lsm));
-	LASSERT(lov->lo_lsm == NULL);
+	LASSERT(!lov->lo_lsm);
 
 	lov->lo_lsm = lsm_addref(lsm);
 	return 0;
@@ -332,7 +332,7 @@ static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
 		}
 		remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
 	}
-	LASSERT(r0->lo_sub[idx] == NULL);
+	LASSERT(!r0->lo_sub[idx]);
 }
 
 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
@@ -345,11 +345,11 @@ static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
 	dump_lsm(D_INODE, lsm);
 
 	lov_layout_wait(env, lov);
-	if (r0->lo_sub != NULL) {
+	if (r0->lo_sub) {
 		for (i = 0; i < r0->lo_nr; ++i) {
 			struct lovsub_object *los = r0->lo_sub[i];
 
-			if (los != NULL) {
+			if (los) {
 				cl_locks_prune(env, &los->lso_cl, 1);
 				/*
 				 * If top-level object is to be evicted from
@@ -374,7 +374,7 @@ static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
 {
 	struct lov_layout_raid0 *r0 = &state->raid0;
 
-	if (r0->lo_sub != NULL) {
+	if (r0->lo_sub) {
 		kvfree(r0->lo_sub);
 		r0->lo_sub = NULL;
 	}
@@ -412,7 +412,7 @@ static int lov_print_raid0(const struct lu_env *env, void *cookie,
 	for (i = 0; i < r0->lo_nr; ++i) {
 		struct lu_object *sub;
 
-		if (r0->lo_sub[i] != NULL) {
+		if (r0->lo_sub[i]) {
 			sub = lovsub2lu(r0->lo_sub[i]);
 			lu_object_print(env, cookie, p, sub);
 		} else {
@@ -569,7 +569,7 @@ static const struct lov_layout_operations lov_dispatch[] = {
  */
 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
 {
-	if (lsm == NULL)
+	if (!lsm)
 		return LLT_EMPTY;
 	if (lsm_is_released(lsm))
 		return LLT_RELEASED;
@@ -624,7 +624,7 @@ static void lov_conf_lock(struct lov_object *lov)
 {
 	LASSERT(lov->lo_owner != current);
 	down_write(&lov->lo_type_guard);
-	LASSERT(lov->lo_owner == NULL);
+	LASSERT(!lov->lo_owner);
 	lov->lo_owner = current;
 }
 
@@ -666,7 +666,7 @@ static int lov_layout_change(const struct lu_env *unused,
 
 	LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
 
-	if (conf->u.coc_md != NULL)
+	if (conf->u.coc_md)
 		llt = lov_type(conf->u.coc_md->lsm);
 	LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
 
@@ -689,7 +689,7 @@ static int lov_layout_change(const struct lu_env *unused,
 		old_ops->llo_fini(env, lov, &lov->u);
 
 		LASSERT(atomic_read(&lov->lo_active_ios) == 0);
-		LASSERT(hdr->coh_tree.rnode == NULL);
+		LASSERT(!hdr->coh_tree.rnode);
 		LASSERT(hdr->coh_pages == 0);
 
 		lov->lo_type = LLT_EMPTY;
@@ -767,10 +767,10 @@ static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
 
 	LASSERT(conf->coc_opc == OBJECT_CONF_SET);
 
-	if (conf->u.coc_md != NULL)
+	if (conf->u.coc_md)
 		lsm = conf->u.coc_md->lsm;
-	if ((lsm == NULL && lov->lo_lsm == NULL) ||
-	    ((lsm != NULL && lov->lo_lsm != NULL) &&
+	if ((!lsm && !lov->lo_lsm) ||
+	    ((lsm && lov->lo_lsm) &&
 	     (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
 	     (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
 		/* same version of layout */
@@ -892,7 +892,7 @@ struct lu_object *lov_object_alloc(const struct lu_env *env,
 	struct lu_object  *obj;
 
 	lov = kmem_cache_alloc(lov_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lov != NULL) {
+	if (lov) {
 		obj = lov2lu(lov);
 		lu_object_init(obj, NULL, dev);
 		lov->lo_cl.co_ops = &lov_ops;
@@ -913,7 +913,7 @@ static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
 	struct lov_stripe_md *lsm = NULL;
 
 	lov_conf_freeze(lov);
-	if (lov->lo_lsm != NULL) {
+	if (lov->lo_lsm) {
 		lsm = lsm_addref(lov->lo_lsm);
 		CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
 			lsm, atomic_read(&lsm->lsm_refc),
@@ -928,12 +928,12 @@ struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
 	struct lu_object *luobj;
 	struct lov_stripe_md *lsm = NULL;
 
-	if (clobj == NULL)
+	if (!clobj)
 		return NULL;
 
 	luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
 				 &lov_device_type);
-	if (luobj != NULL)
+	if (luobj)
 		lsm = lov_lsm_addref(lu2lov(luobj));
 	return lsm;
 }
@@ -941,7 +941,7 @@ EXPORT_SYMBOL(lov_lsm_get);
 
 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
 {
-	if (lsm != NULL)
+	if (lsm)
 		lov_free_memmd(&lsm);
 }
 EXPORT_SYMBOL(lov_lsm_put);
@@ -953,7 +953,7 @@ int lov_read_and_clear_async_rc(struct cl_object *clob)
 
 	luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
 				 &lov_device_type);
-	if (luobj != NULL) {
+	if (luobj) {
 		struct lov_object *lov = lu2lov(luobj);
 
 		lov_conf_freeze(lov);
@@ -963,7 +963,6 @@ int lov_read_and_clear_async_rc(struct cl_object *clob)
 			int i;
 
 			lsm = lov->lo_lsm;
-			LASSERT(lsm != NULL);
 			for (i = 0; i < lsm->lsm_stripe_count; i++) {
 				struct lov_oinfo *loi = lsm->lsm_oinfo[i];
 
diff --git a/drivers/staging/lustre/lustre/lov/lov_offset.c b/drivers/staging/lustre/lustre/lov/lov_offset.c
index aa520aa..5feb2e9 100644
--- a/drivers/staging/lustre/lustre/lov/lov_offset.c
+++ b/drivers/staging/lustre/lustre/lov/lov_offset.c
@@ -55,7 +55,6 @@ u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size,
 	if (ost_size == 0)
 		return 0;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, NULL, &swidth);
 
 	/* lov_do_div64(a, b) returns a % b, and a = a / b */
@@ -129,8 +128,6 @@ int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
 		return 0;
 	}
 
-	LASSERT(lsm_op_find(magic) != NULL);
-
 	lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &lov_off,
 						&swidth);
 
@@ -183,7 +180,6 @@ u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
 	if (file_size == OBD_OBJECT_EOF)
 		return OBD_OBJECT_EOF;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &file_size,
 						&swidth);
 
@@ -252,7 +248,6 @@ int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off)
 	u64 stripe_off, swidth;
 	int magic = lsm->lsm_magic;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	lsm_op_find(magic)->lsm_stripe_by_offset(lsm, NULL, &lov_off, &swidth);
 
 	stripe_off = lov_do_div64(lov_off, swidth);
diff --git a/drivers/staging/lustre/lustre/lov/lov_pack.c b/drivers/staging/lustre/lustre/lov/lov_pack.c
index a78211f..4680160 100644
--- a/drivers/staging/lustre/lustre/lov/lov_pack.c
+++ b/drivers/staging/lustre/lustre/lov/lov_pack.c
@@ -257,7 +257,7 @@ static int lov_verify_lmm(void *lmm, int lmm_bytes, __u16 *stripe_count)
 {
 	int rc;
 
-	if (lsm_op_find(le32_to_cpu(*(__u32 *)lmm)) == NULL) {
+	if (!lsm_op_find(le32_to_cpu(*(__u32 *)lmm))) {
 		CERROR("bad disk LOV MAGIC: 0x%08X; dumping LMM (size=%d):\n",
 		       le32_to_cpu(*(__u32 *)lmm), lmm_bytes);
 		CERROR("%*phN\n", lmm_bytes, lmm);
@@ -306,10 +306,9 @@ int lov_free_memmd(struct lov_stripe_md **lsmp)
 	*lsmp = NULL;
 	LASSERT(atomic_read(&lsm->lsm_refc) > 0);
 	refc = atomic_dec_return(&lsm->lsm_refc);
-	if (refc == 0) {
-		LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
+	if (refc == 0)
 		lsm_op_find(lsm->lsm_magic)->lsm_free(lsm);
-	}
+
 	return refc;
 }
 
@@ -359,7 +358,6 @@ int lov_unpackmd(struct obd_export *exp,  struct lov_stripe_md **lsmp,
 	if (!lmm)
 		return lsm_size;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	rc = lsm_op_find(magic)->lsm_unpackmd(lov, *lsmp, lmm);
 	if (rc) {
 		lov_free_memmd(lsmp);
diff --git a/drivers/staging/lustre/lustre/lov/lov_page.c b/drivers/staging/lustre/lustre/lov/lov_page.c
index 037ae91..17ae450 100644
--- a/drivers/staging/lustre/lustre/lov/lov_page.c
+++ b/drivers/staging/lustre/lustre/lov/lov_page.c
@@ -57,7 +57,7 @@ static int lov_page_invariant(const struct cl_page_slice *slice)
 	const struct cl_page  *page = slice->cpl_page;
 	const struct cl_page  *sub  = lov_sub_page(slice);
 
-	return ergo(sub != NULL,
+	return ergo(sub,
 		    page->cp_child == sub &&
 		    sub->cp_parent == page &&
 		    page->cp_state == sub->cp_state);
@@ -70,7 +70,7 @@ static void lov_page_fini(const struct lu_env *env,
 
 	LINVRNT(lov_page_invariant(slice));
 
-	if (sub != NULL) {
+	if (sub) {
 		LASSERT(sub->cp_state == CPS_FREEING);
 		lu_ref_del(&sub->cp_reference, "lov", sub->cp_parent);
 		sub->cp_parent = NULL;
@@ -151,7 +151,7 @@ static const struct cl_page_operations lov_page_ops = {
 static void lov_empty_page_fini(const struct lu_env *env,
 				struct cl_page_slice *slice)
 {
-	LASSERT(slice->cpl_page->cp_child == NULL);
+	LASSERT(!slice->cpl_page->cp_child);
 }
 
 int lov_page_init_raid0(const struct lu_env *env, struct cl_object *obj,
diff --git a/drivers/staging/lustre/lustre/lov/lov_pool.c b/drivers/staging/lustre/lustre/lov/lov_pool.c
index 470708c..b9d3622 100644
--- a/drivers/staging/lustre/lustre/lov/lov_pool.c
+++ b/drivers/staging/lustre/lustre/lov/lov_pool.c
@@ -64,7 +64,7 @@ void lov_pool_putref(struct pool_desc *pool)
 	if (atomic_dec_and_test(&pool->pool_refcount)) {
 		LASSERT(hlist_unhashed(&pool->pool_hash));
 		LASSERT(list_empty(&pool->pool_list));
-		LASSERT(pool->pool_debugfs_entry == NULL);
+		LASSERT(!pool->pool_debugfs_entry);
 		lov_ost_pool_free(&(pool->pool_rr.lqr_pool));
 		lov_ost_pool_free(&(pool->pool_obds));
 		kfree(pool);
@@ -227,7 +227,7 @@ static void *pool_proc_start(struct seq_file *s, loff_t *pos)
 		i = 0;
 		do {
 		     ptr = pool_proc_next(s, &iter, &i);
-		} while ((i < *pos) && (ptr != NULL));
+		} while ((i < *pos) && ptr);
 		return ptr;
 	}
 	return iter;
@@ -255,7 +255,7 @@ static int pool_proc_show(struct seq_file *s, void *v)
 	struct lov_tgt_desc *tgt;
 
 	LASSERTF(iter->magic == POOL_IT_MAGIC, "%08X", iter->magic);
-	LASSERT(iter->pool != NULL);
+	LASSERT(iter->pool);
 	LASSERT(iter->idx <= pool_tgt_count(iter->pool));
 
 	down_read(&pool_tgt_rw_sem(iter->pool));
@@ -304,7 +304,7 @@ int lov_ost_pool_init(struct ost_pool *op, unsigned int count)
 	init_rwsem(&op->op_rw_sem);
 	op->op_size = count;
 	op->op_array = kcalloc(op->op_size, sizeof(op->op_array[0]), GFP_NOFS);
-	if (op->op_array == NULL) {
+	if (!op->op_array) {
 		op->op_size = 0;
 		return -ENOMEM;
 	}
@@ -324,7 +324,7 @@ int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count)
 
 	new_size = max(min_count, 2 * op->op_size);
 	new = kcalloc(new_size, sizeof(op->op_array[0]), GFP_NOFS);
-	if (new == NULL)
+	if (!new)
 		return -ENOMEM;
 
 	/* copy old array to new one */
@@ -486,7 +486,7 @@ int lov_pool_del(struct obd_device *obd, char *poolname)
 
 	/* lookup and kill hash reference */
 	pool = cfs_hash_del_key(lov->lov_pools_hash_body, poolname);
-	if (pool == NULL)
+	if (!pool)
 		return -ENOENT;
 
 	if (!IS_ERR_OR_NULL(pool->pool_debugfs_entry)) {
@@ -517,7 +517,7 @@ int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 	lov = &(obd->u.lov);
 
 	pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-	if (pool == NULL)
+	if (!pool)
 		return -ENOENT;
 
 	obd_str2uuid(&ost_uuid, ostname);
@@ -563,7 +563,7 @@ int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname)
 	lov = &(obd->u.lov);
 
 	pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-	if (pool == NULL)
+	if (!pool)
 		return -ENOENT;
 
 	obd_str2uuid(&ost_uuid, ostname);
@@ -631,10 +631,10 @@ struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname)
 	pool = NULL;
 	if (poolname[0] != '\0') {
 		pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-		if (pool == NULL)
+		if (!pool)
 			CWARN("Request for an unknown pool ("LOV_POOLNAMEF")\n",
 			      poolname);
-		if ((pool != NULL) && (pool_tgt_count(pool) == 0)) {
+		if (pool && (pool_tgt_count(pool) == 0)) {
 			CWARN("Request for an empty pool ("LOV_POOLNAMEF")\n",
 			       poolname);
 			/* pool is ignored, so we remove ref on it */
diff --git a/drivers/staging/lustre/lustre/lov/lov_request.c b/drivers/staging/lustre/lustre/lov/lov_request.c
index 42deda7..6c5ae05 100644
--- a/drivers/staging/lustre/lustre/lov/lov_request.c
+++ b/drivers/staging/lustre/lustre/lov/lov_request.c
@@ -156,7 +156,7 @@ static int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
 
 	tgt = lov->lov_tgts[ost_idx];
 
-	if (unlikely(tgt == NULL)) {
+	if (unlikely(!tgt)) {
 		rc = 0;
 		goto out;
 	}
@@ -178,7 +178,7 @@ static int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
 				   cfs_time_seconds(1), NULL, NULL);
 
 	rc = l_wait_event(waitq, lov_check_set(lov, ost_idx), &lwi);
-	if (tgt != NULL && tgt->ltd_active)
+	if (tgt && tgt->ltd_active)
 		return 1;
 
 	return 0;
@@ -195,16 +195,14 @@ static int common_attr_done(struct lov_request_set *set)
 	struct obdo *tmp_oa;
 	int rc = 0, attrset = 0;
 
-	LASSERT(set->set_oi != NULL);
-
-	if (set->set_oi->oi_oa == NULL)
+	if (!set->set_oi->oi_oa)
 		return 0;
 
 	if (!atomic_read(&set->set_success))
 		return -EIO;
 
 	tmp_oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (tmp_oa == NULL) {
+	if (!tmp_oa) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -246,7 +244,7 @@ int lov_fini_getattr_set(struct lov_request_set *set)
 {
 	int rc = 0;
 
-	if (set == NULL)
+	if (!set)
 		return 0;
 	LASSERT(set->set_exp);
 	if (atomic_read(&set->set_completes))
@@ -312,7 +310,7 @@ int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
 
 		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
 						    GFP_NOFS | __GFP_ZERO);
-		if (req->rq_oi.oi_oa == NULL) {
+		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
 			goto out_set;
@@ -337,7 +335,7 @@ out_set:
 
 int lov_fini_destroy_set(struct lov_request_set *set)
 {
-	if (set == NULL)
+	if (!set)
 		return 0;
 	LASSERT(set->set_exp);
 	if (atomic_read(&set->set_completes)) {
@@ -368,7 +366,7 @@ int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 	set->set_oi->oi_md = lsm;
 	set->set_oi->oi_oa = src_oa;
 	set->set_oti = oti;
-	if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
+	if (oti && src_oa->o_valid & OBD_MD_FLCOOKIE)
 		set->set_cookies = oti->oti_logcookies;
 
 	for (i = 0; i < lsm->lsm_stripe_count; i++) {
@@ -395,7 +393,7 @@ int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 
 		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
 						    GFP_NOFS | __GFP_ZERO);
-		if (req->rq_oi.oi_oa == NULL) {
+		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
 			goto out_set;
@@ -419,7 +417,7 @@ int lov_fini_setattr_set(struct lov_request_set *set)
 {
 	int rc = 0;
 
-	if (set == NULL)
+	if (!set)
 		return 0;
 	LASSERT(set->set_exp);
 	if (atomic_read(&set->set_completes)) {
@@ -486,7 +484,7 @@ int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
 	set->set_exp = exp;
 	set->set_oti = oti;
 	set->set_oi = oinfo;
-	if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
+	if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
 		set->set_cookies = oti->oti_logcookies;
 
 	for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
@@ -511,7 +509,7 @@ int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
 
 		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
 						    GFP_NOFS | __GFP_ZERO);
-		if (req->rq_oi.oi_oa == NULL) {
+		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
 			goto out_set;
@@ -581,7 +579,7 @@ int lov_fini_statfs_set(struct lov_request_set *set)
 {
 	int rc = 0;
 
-	if (set == NULL)
+	if (!set)
 		return 0;
 
 	if (atomic_read(&set->set_completes)) {
@@ -718,7 +716,7 @@ int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
 	for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 		struct lov_request *req;
 
-		if (lov->lov_tgts[i] == NULL ||
+		if (!lov->lov_tgts[i] ||
 		    (!lov_check_and_wait_active(lov, i) &&
 		     (oinfo->oi_flags & OBD_STATFS_NODELAY))) {
 			CDEBUG(D_HA, "lov idx %d inactive\n", i);
diff --git a/drivers/staging/lustre/lustre/lov/lovsub_dev.c b/drivers/staging/lustre/lustre/lov/lovsub_dev.c
index f1795c3..233740c 100644
--- a/drivers/staging/lustre/lustre/lov/lovsub_dev.c
+++ b/drivers/staging/lustre/lustre/lov/lovsub_dev.c
@@ -101,7 +101,6 @@ static int lovsub_device_init(const struct lu_env *env, struct lu_device *d,
 
 	next->ld_site = d->ld_site;
 	ldt = next->ld_type;
-	LASSERT(ldt != NULL);
 	rc = ldt->ldt_ops->ldto_device_init(env, next, ldt->ldt_name, NULL);
 	if (rc) {
 		next->ld_site = NULL;
@@ -149,7 +148,7 @@ static int lovsub_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	lsr = kmem_cache_alloc(lovsub_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lsr != NULL) {
+	if (lsr) {
 		cl_req_slice_add(req, &lsr->lsrq_cl, dev, &lovsub_req_ops);
 		result = 0;
 	} else
@@ -175,7 +174,7 @@ static struct lu_device *lovsub_device_alloc(const struct lu_env *env,
 	struct lovsub_device *lsd;
 
 	lsd = kzalloc(sizeof(*lsd), GFP_NOFS);
-	if (lsd != NULL) {
+	if (lsd) {
 		int result;
 
 		result = cl_device_init(&lsd->acid_cl, t);
diff --git a/drivers/staging/lustre/lustre/lov/lovsub_lock.c b/drivers/staging/lustre/lustre/lov/lovsub_lock.c
index 1a3e30a..bd38736 100644
--- a/drivers/staging/lustre/lustre/lov/lovsub_lock.c
+++ b/drivers/staging/lustre/lustre/lov/lovsub_lock.c
@@ -429,7 +429,7 @@ static int lovsub_lock_print(const struct lu_env *env, void *cookie,
 	list_for_each_entry(scan, &sub->lss_parents, lll_list) {
 		lov = scan->lll_super;
 		(*p)(env, cookie, "[%d %p ", scan->lll_idx, lov);
-		if (lov != NULL)
+		if (lov)
 			cl_lock_descr_print(env, cookie, p,
 					    &lov->lls_cl.cls_lock->cll_descr);
 		(*p)(env, cookie, "] ");
@@ -454,7 +454,7 @@ int lovsub_lock_init(const struct lu_env *env, struct cl_object *obj,
 	int result;
 
 	lsk = kmem_cache_alloc(lovsub_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lsk != NULL) {
+	if (lsk) {
 		INIT_LIST_HEAD(&lsk->lss_parents);
 		cl_lock_slice_add(lock, &lsk->lss_cl, obj, &lovsub_lock_ops);
 		result = 0;
diff --git a/drivers/staging/lustre/lustre/lov/lovsub_object.c b/drivers/staging/lustre/lustre/lov/lovsub_object.c
index 5ba5ee1..0a9bf51 100644
--- a/drivers/staging/lustre/lustre/lov/lovsub_object.c
+++ b/drivers/staging/lustre/lustre/lov/lovsub_object.c
@@ -63,7 +63,7 @@ int lovsub_object_init(const struct lu_env *env, struct lu_object *obj,
 
 	under = &dev->acid_next->cd_lu_dev;
 	below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
-	if (below != NULL) {
+	if (below) {
 		lu_object_add(obj, below);
 		cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
 		result = 0;
@@ -144,7 +144,7 @@ struct lu_object *lovsub_object_alloc(const struct lu_env *env,
 	struct lu_object     *obj;
 
 	los = kmem_cache_alloc(lovsub_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (los != NULL) {
+	if (los) {
 		struct cl_object_header *hdr;
 
 		obj = lovsub2lu(los);
diff --git a/drivers/staging/lustre/lustre/lov/lproc_lov.c b/drivers/staging/lustre/lustre/lov/lproc_lov.c
index 337241d..bb81d04 100644
--- a/drivers/staging/lustre/lustre/lov/lproc_lov.c
+++ b/drivers/staging/lustre/lustre/lov/lproc_lov.c
@@ -46,7 +46,7 @@ static int lov_stripesize_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%llu\n", desc->ld_default_stripe_size);
 	return 0;
@@ -61,7 +61,7 @@ static ssize_t lov_stripesize_seq_write(struct file *file,
 	__u64 val;
 	int rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_u64_helper(buffer, count, &val);
 	if (rc)
@@ -79,7 +79,7 @@ static int lov_stripeoffset_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%llu\n", desc->ld_default_stripe_offset);
 	return 0;
@@ -94,7 +94,7 @@ static ssize_t lov_stripeoffset_seq_write(struct file *file,
 	__u64 val;
 	int rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_u64_helper(buffer, count, &val);
 	if (rc)
@@ -111,7 +111,7 @@ static int lov_stripetype_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%u\n", desc->ld_pattern);
 	return 0;
@@ -125,7 +125,7 @@ static ssize_t lov_stripetype_seq_write(struct file *file,
 	struct lov_desc *desc;
 	int val, rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_helper(buffer, count, &val);
 	if (rc)
@@ -143,7 +143,7 @@ static int lov_stripecount_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%d\n", (__s16)(desc->ld_default_stripe_count + 1) - 1);
 	return 0;
@@ -157,7 +157,7 @@ static ssize_t lov_stripecount_seq_write(struct file *file,
 	struct lov_desc *desc;
 	int val, rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_helper(buffer, count, &val);
 	if (rc)
@@ -199,7 +199,7 @@ static int lov_desc_uuid_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_obd *lov;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	lov = &dev->u.lov;
 	seq_printf(m, "%s\n", lov->desc.ld_uuid.uuid);
 	return 0;
-- 
2.1.0

[lustre-devel] [PATCH 13/45] staging/lustre/lov: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"
Also removed some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 .../staging/lustre/lustre/lov/lov_cl_internal.h    |  6 +--
 drivers/staging/lustre/lustre/lov/lov_dev.c        | 40 ++++++++---------
 drivers/staging/lustre/lustre/lov/lov_ea.c         |  4 +-
 drivers/staging/lustre/lustre/lov/lov_internal.h   |  1 -
 drivers/staging/lustre/lustre/lov/lov_io.c         | 30 ++++++-------
 drivers/staging/lustre/lustre/lov/lov_lock.c       | 49 ++++++++++-----------
 drivers/staging/lustre/lustre/lov/lov_obd.c        | 44 +++++++++----------
 drivers/staging/lustre/lustre/lov/lov_object.c     | 51 +++++++++++-----------
 drivers/staging/lustre/lustre/lov/lov_offset.c     |  5 ---
 drivers/staging/lustre/lustre/lov/lov_pack.c       |  8 ++--
 drivers/staging/lustre/lustre/lov/lov_page.c       |  6 +--
 drivers/staging/lustre/lustre/lov/lov_pool.c       | 20 ++++-----
 drivers/staging/lustre/lustre/lov/lov_request.c    | 30 ++++++-------
 drivers/staging/lustre/lustre/lov/lovsub_dev.c     |  5 +--
 drivers/staging/lustre/lustre/lov/lovsub_lock.c    |  4 +-
 drivers/staging/lustre/lustre/lov/lovsub_object.c  |  4 +-
 drivers/staging/lustre/lustre/lov/lproc_lov.c      | 18 ++++----
 17 files changed, 152 insertions(+), 173 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lov/lov_cl_internal.h b/drivers/staging/lustre/lustre/lov/lov_cl_internal.h
index 66a2492..b5fc159 100644
--- a/drivers/staging/lustre/lustre/lov/lov_cl_internal.h
+++ b/drivers/staging/lustre/lustre/lov/lov_cl_internal.h
@@ -651,7 +651,7 @@ static inline struct lov_session *lov_env_session(const struct lu_env *env)
 	struct lov_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &lov_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
@@ -759,7 +759,7 @@ static inline struct lovsub_lock *cl2sub_lock(const struct cl_lock *lock)
 	const struct cl_lock_slice *slice;
 
 	slice = cl_lock_at(lock, &lovsub_device_type);
-	LASSERT(slice != NULL);
+	LASSERT(slice);
 	return cl2lovsub_lock(slice);
 }
 
@@ -817,7 +817,7 @@ static inline struct lov_thread_info *lov_env_info(const struct lu_env *env)
 	struct lov_thread_info *info;
 
 	info = lu_context_key_get(&env->le_ctx, &lov_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
diff --git a/drivers/staging/lustre/lustre/lov/lov_dev.c b/drivers/staging/lustre/lustre/lov/lov_dev.c
index 2c33cbc..ee093e0 100644
--- a/drivers/staging/lustre/lustre/lov/lov_dev.c
+++ b/drivers/staging/lustre/lustre/lov/lov_dev.c
@@ -143,7 +143,7 @@ static void *lov_key_init(const struct lu_context *ctx,
 	struct lov_thread_info *info;
 
 	info = kmem_cache_alloc(lov_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info != NULL)
+	if (info)
 		INIT_LIST_HEAD(&info->lti_closure.clc_list);
 	else
 		info = ERR_PTR(-ENOMEM);
@@ -171,7 +171,7 @@ static void *lov_session_key_init(const struct lu_context *ctx,
 	struct lov_session *info;
 
 	info = kmem_cache_alloc(lov_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -199,15 +199,15 @@ static struct lu_device *lov_device_fini(const struct lu_env *env,
 	int i;
 	struct lov_device *ld = lu2lov_dev(d);
 
-	LASSERT(ld->ld_lov != NULL);
-	if (ld->ld_target == NULL)
+	LASSERT(ld->ld_lov);
+	if (!ld->ld_target)
 		return NULL;
 
 	lov_foreach_target(ld, i) {
 		struct lovsub_device *lsd;
 
 		lsd = ld->ld_target[i];
-		if (lsd != NULL) {
+		if (lsd) {
 			cl_stack_fini(env, lovsub2cl_dev(lsd));
 			ld->ld_target[i] = NULL;
 		}
@@ -222,8 +222,8 @@ static int lov_device_init(const struct lu_env *env, struct lu_device *d,
 	int i;
 	int rc = 0;
 
-	LASSERT(d->ld_site != NULL);
-	if (ld->ld_target == NULL)
+	LASSERT(d->ld_site);
+	if (!ld->ld_target)
 		return rc;
 
 	lov_foreach_target(ld, i) {
@@ -232,7 +232,7 @@ static int lov_device_init(const struct lu_env *env, struct lu_device *d,
 		struct lov_tgt_desc  *desc;
 
 		desc = ld->ld_lov->lov_tgts[i];
-		if (desc == NULL)
+		if (!desc)
 			continue;
 
 		cl = cl_type_setup(env, d->ld_site, &lovsub_device_type,
@@ -262,7 +262,7 @@ static int lov_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	lr = kmem_cache_alloc(lov_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lr != NULL) {
+	if (lr) {
 		cl_req_slice_add(req, &lr->lr_cl, dev, &lov_req_ops);
 		result = 0;
 	} else
@@ -282,9 +282,9 @@ static void lov_emerg_free(struct lov_device_emerg **emrg, int nr)
 		struct lov_device_emerg *em;
 
 		em = emrg[i];
-		if (em != NULL) {
+		if (em) {
 			LASSERT(em->emrg_page_list.pl_nr == 0);
-			if (em->emrg_env != NULL)
+			if (em->emrg_env)
 				cl_env_put(em->emrg_env, &em->emrg_refcheck);
 			kfree(em);
 		}
@@ -300,7 +300,7 @@ static struct lu_device *lov_device_free(const struct lu_env *env,
 
 	cl_device_fini(lu2cl_dev(d));
 	kfree(ld->ld_target);
-	if (ld->ld_emrg != NULL)
+	if (ld->ld_emrg)
 		lov_emerg_free(ld->ld_emrg, nr);
 	kfree(ld);
 	return NULL;
@@ -311,7 +311,7 @@ static void lov_cl_del_target(const struct lu_env *env, struct lu_device *dev,
 {
 	struct lov_device *ld = lu2lov_dev(dev);
 
-	if (ld->ld_target[index] != NULL) {
+	if (ld->ld_target[index]) {
 		cl_stack_fini(env, lovsub2cl_dev(ld->ld_target[index]));
 		ld->ld_target[index] = NULL;
 	}
@@ -324,13 +324,13 @@ static struct lov_device_emerg **lov_emerg_alloc(int nr)
 	int result;
 
 	emerg = kcalloc(nr, sizeof(emerg[0]), GFP_NOFS);
-	if (emerg == NULL)
+	if (!emerg)
 		return ERR_PTR(-ENOMEM);
 	for (result = i = 0; i < nr && result == 0; i++) {
 		struct lov_device_emerg *em;
 
 		em = kzalloc(sizeof(*em), GFP_NOFS);
-		if (em != NULL) {
+		if (em) {
 			emerg[i] = em;
 			cl_page_list_init(&em->emrg_page_list);
 			em->emrg_env = cl_env_alloc(&em->emrg_refcheck,
@@ -370,7 +370,7 @@ static int lov_expand_targets(const struct lu_env *env, struct lov_device *dev)
 			return PTR_ERR(emerg);
 
 		newd = kcalloc(tgt_size, sz, GFP_NOFS);
-		if (newd != NULL) {
+		if (newd) {
 			mutex_lock(&dev->ld_mutex);
 			if (sub_size > 0) {
 				memcpy(newd, dev->ld_target, sub_size * sz);
@@ -379,7 +379,7 @@ static int lov_expand_targets(const struct lu_env *env, struct lov_device *dev)
 			dev->ld_target    = newd;
 			dev->ld_target_nr = tgt_size;
 
-			if (dev->ld_emrg != NULL)
+			if (dev->ld_emrg)
 				lov_emerg_free(dev->ld_emrg, sub_size);
 			dev->ld_emrg = emerg;
 			mutex_unlock(&dev->ld_mutex);
@@ -404,8 +404,6 @@ static int lov_cl_add_target(const struct lu_env *env, struct lu_device *dev,
 	obd_getref(obd);
 
 	tgt = obd->u.lov.lov_tgts[index];
-	LASSERT(tgt != NULL);
-	LASSERT(tgt->ltd_obd != NULL);
 
 	if (!tgt->ltd_obd->obd_set_up) {
 		CERROR("Target %s not set up\n", obd_uuid2str(&tgt->ltd_uuid));
@@ -414,7 +412,7 @@ static int lov_cl_add_target(const struct lu_env *env, struct lu_device *dev,
 
 	rc = lov_expand_targets(env, ld);
 	if (rc == 0 && ld->ld_flags & LOV_DEV_INITIALIZED) {
-		LASSERT(dev->ld_site != NULL);
+		LASSERT(dev->ld_site);
 
 		cl = cl_type_setup(env, dev->ld_site, &lovsub_device_type,
 				   tgt->ltd_obd->obd_lu_dev);
@@ -492,7 +490,7 @@ static struct lu_device *lov_device_alloc(const struct lu_env *env,
 
 	/* setup the LOV OBD */
 	obd = class_name2obd(lustre_cfg_string(cfg, 0));
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lov_setup(obd, cfg);
 	if (rc) {
 		lov_device_free(env, d);
diff --git a/drivers/staging/lustre/lustre/lov/lov_ea.c b/drivers/staging/lustre/lustre/lov/lov_ea.c
index b3c9c85..6c8381a 100644
--- a/drivers/staging/lustre/lustre/lov/lov_ea.c
+++ b/drivers/staging/lustre/lustre/lov/lov_ea.c
@@ -101,7 +101,7 @@ struct lov_stripe_md *lsm_alloc_plain(__u16 stripe_count, int *size)
 
 	for (i = 0; i < stripe_count; i++) {
 		loi = kmem_cache_alloc(lov_oinfo_slab, GFP_NOFS | __GFP_ZERO);
-		if (loi == NULL)
+		if (!loi)
 			goto err;
 		lsm->lsm_oinfo[i] = loi;
 	}
@@ -167,7 +167,7 @@ static void lov_tgt_maxbytes(struct lov_tgt_desc *tgt, __u64 *stripe_maxbytes)
 {
 	struct obd_import *imp = tgt->ltd_obd->u.cli.cl_import;
 
-	if (imp == NULL || !tgt->ltd_active) {
+	if (!imp || !tgt->ltd_active) {
 		*stripe_maxbytes = LUSTRE_STRIPE_MAXBYTES;
 		return;
 	}
diff --git a/drivers/staging/lustre/lustre/lov/lov_internal.h b/drivers/staging/lustre/lustre/lov/lov_internal.h
index f8e92fe..d4522ba 100644
--- a/drivers/staging/lustre/lustre/lov/lov_internal.h
+++ b/drivers/staging/lustre/lustre/lov/lov_internal.h
@@ -114,7 +114,6 @@ void lov_finish_set(struct lov_request_set *set);
 
 static inline void lov_get_reqset(struct lov_request_set *set)
 {
-	LASSERT(set != NULL);
 	LASSERT(atomic_read(&set->set_refcount) > 0);
 	atomic_inc(&set->set_refcount);
 }
diff --git a/drivers/staging/lustre/lustre/lov/lov_io.c b/drivers/staging/lustre/lustre/lov/lov_io.c
index 93fe69e..50954ce 100644
--- a/drivers/staging/lustre/lustre/lov/lov_io.c
+++ b/drivers/staging/lustre/lustre/lov/lov_io.c
@@ -60,7 +60,7 @@ static inline void lov_sub_exit(struct lov_io_sub *sub)
 static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
 			    struct lov_io_sub *sub)
 {
-	if (sub->sub_io != NULL) {
+	if (sub->sub_io) {
 		if (sub->sub_io_initialized) {
 			lov_sub_enter(sub);
 			cl_io_fini(sub->sub_env, sub->sub_io);
@@ -74,7 +74,7 @@ static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
 			kfree(sub->sub_io);
 		sub->sub_io = NULL;
 	}
-	if (sub->sub_env != NULL && !IS_ERR(sub->sub_env)) {
+	if (!IS_ERR_OR_NULL(sub->sub_env)) {
 		if (!sub->sub_borrowed)
 			cl_env_put(sub->sub_env, &sub->sub_refcheck);
 		sub->sub_env = NULL;
@@ -143,11 +143,11 @@ static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
 	int stripe = sub->sub_stripe;
 	int result;
 
-	LASSERT(sub->sub_io == NULL);
-	LASSERT(sub->sub_env == NULL);
+	LASSERT(!sub->sub_io);
+	LASSERT(!sub->sub_env);
 	LASSERT(sub->sub_stripe < lio->lis_stripe_count);
 
-	if (unlikely(lov_r0(lov)->lo_sub[stripe] == NULL))
+	if (unlikely(!lov_r0(lov)->lo_sub[stripe]))
 		return -EIO;
 
 	result = 0;
@@ -252,7 +252,6 @@ static int lov_page_stripe(const struct cl_page *page)
 	subobj = lu2lovsub(
 		lu_object_locate(page->cp_child->cp_obj->co_lu.lo_header,
 				 &lovsub_device_type));
-	LASSERT(subobj != NULL);
 	return subobj->lso_index;
 }
 
@@ -263,9 +262,9 @@ struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
 	struct cl_page       *page = slice->cpl_page;
 	int stripe;
 
-	LASSERT(lio->lis_cl.cis_io != NULL);
+	LASSERT(lio->lis_cl.cis_io);
 	LASSERT(cl2lov(slice->cpl_obj) == lio->lis_object);
-	LASSERT(lsm != NULL);
+	LASSERT(lsm);
 	LASSERT(lio->lis_nr_subios > 0);
 
 	stripe = lov_page_stripe(page);
@@ -278,7 +277,7 @@ static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
 	struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
 	int result;
 
-	LASSERT(lio->lis_object != NULL);
+	LASSERT(lio->lis_object);
 
 	/*
 	 * Need to be optimized, we can't afford to allocate a piece of memory
@@ -288,7 +287,7 @@ static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
 		libcfs_kvzalloc(lsm->lsm_stripe_count *
 				sizeof(lio->lis_subs[0]),
 				GFP_NOFS);
-	if (lio->lis_subs != NULL) {
+	if (lio->lis_subs) {
 		lio->lis_nr_subios = lio->lis_stripe_count;
 		lio->lis_single_subio_index = -1;
 		lio->lis_active_subios = 0;
@@ -304,7 +303,6 @@ static void lov_io_slice_init(struct lov_io *lio,
 	io->ci_result = 0;
 	lio->lis_object = obj;
 
-	LASSERT(obj->lo_lsm != NULL);
 	lio->lis_stripe_count = obj->lo_lsm->lsm_stripe_count;
 
 	switch (io->ci_type) {
@@ -358,7 +356,7 @@ static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
 	struct lov_object *lov = cl2lov(ios->cis_obj);
 	int i;
 
-	if (lio->lis_subs != NULL) {
+	if (lio->lis_subs) {
 		for (i = 0; i < lio->lis_nr_subios; i++)
 			lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
 		kvfree(lio->lis_subs);
@@ -395,7 +393,7 @@ static int lov_io_iter_init(const struct lu_env *env,
 					   endpos, &start, &end))
 			continue;
 
-		if (unlikely(lov_r0(lio->lis_object)->lo_sub[stripe] == NULL)) {
+		if (unlikely(!lov_r0(lio->lis_object)->lo_sub[stripe])) {
 			if (ios->cis_io->ci_type == CIT_READ ||
 			    ios->cis_io->ci_type == CIT_WRITE ||
 			    ios->cis_io->ci_type == CIT_FAULT)
@@ -601,13 +599,13 @@ static int lov_io_submit(const struct lu_env *env,
 		return rc;
 	}
 
-	LASSERT(lio->lis_subs != NULL);
+	LASSERT(lio->lis_subs);
 	if (alloc) {
 		stripes_qin =
 			libcfs_kvzalloc(sizeof(*stripes_qin) *
 					lio->lis_nr_subios,
 					GFP_NOFS);
-		if (stripes_qin == NULL)
+		if (!stripes_qin)
 			return -ENOMEM;
 
 		for (stripe = 0; stripe < lio->lis_nr_subios; stripe++)
@@ -955,7 +953,7 @@ int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
 	struct lov_io *lio = lov_env_io(env);
 	int result;
 
-	LASSERT(lov->lo_lsm != NULL);
+	LASSERT(lov->lo_lsm);
 	lio->lis_object = lov;
 
 	switch (io->ci_type) {
diff --git a/drivers/staging/lustre/lustre/lov/lov_lock.c b/drivers/staging/lustre/lustre/lov/lov_lock.c
index 36615da..e6b0437 100644
--- a/drivers/staging/lustre/lustre/lov/lov_lock.c
+++ b/drivers/staging/lustre/lustre/lov/lov_lock.c
@@ -115,7 +115,7 @@ static void lov_sublock_adopt(const struct lu_env *env, struct lov_lock *lck,
 	/*
 	 * check that sub-lock doesn't have lock link to this top-lock.
 	 */
-	LASSERT(lov_lock_link_find(env, lck, lsl) == NULL);
+	LASSERT(!lov_lock_link_find(env, lck, lsl));
 	LASSERT(idx < lck->lls_nr);
 
 	lck->lls_sub[idx].sub_lock = lsl;
@@ -145,7 +145,7 @@ static struct cl_lock *lov_sublock_alloc(const struct lu_env *env,
 	LASSERT(idx < lck->lls_nr);
 
 	link = kmem_cache_alloc(lov_lock_link_kmem, GFP_NOFS | __GFP_ZERO);
-	if (link != NULL) {
+	if (link) {
 		struct lov_sublock_env *subenv;
 		struct lov_lock_sub  *lls;
 		struct cl_lock_descr *descr;
@@ -220,7 +220,7 @@ static int lov_sublock_lock(const struct lu_env *env,
 			LASSERT(!(lls->sub_flags & LSF_HELD));
 
 			link = lov_lock_link_find(env, lck, sublock);
-			LASSERT(link != NULL);
+			LASSERT(link);
 			lov_lock_unlink(env, link, sublock);
 			lov_sublock_unlock(env, sublock, closure, NULL);
 			lck->lls_cancel_race = 1;
@@ -309,14 +309,14 @@ static int lov_lock_sub_init(const struct lu_env *env,
 		 * XXX for wide striping smarter algorithm is desirable,
 		 * breaking out of the loop, early.
 		 */
-		if (likely(r0->lo_sub[i] != NULL) &&
+		if (likely(r0->lo_sub[i]) &&
 		    lov_stripe_intersects(loo->lo_lsm, i,
 					  file_start, file_end, &start, &end))
 			nr++;
 	}
 	LASSERT(nr > 0);
 	lck->lls_sub = libcfs_kvzalloc(nr * sizeof(lck->lls_sub[0]), GFP_NOFS);
-	if (lck->lls_sub == NULL)
+	if (!lck->lls_sub)
 		return -ENOMEM;
 
 	lck->lls_nr = nr;
@@ -328,14 +328,14 @@ static int lov_lock_sub_init(const struct lu_env *env,
 	 * top-lock.
 	 */
 	for (i = 0, nr = 0; i < r0->lo_nr; ++i) {
-		if (likely(r0->lo_sub[i] != NULL) &&
+		if (likely(r0->lo_sub[i]) &&
 		    lov_stripe_intersects(loo->lo_lsm, i,
 					  file_start, file_end, &start, &end)) {
 			struct cl_lock_descr *descr;
 
 			descr = &lck->lls_sub[nr].sub_descr;
 
-			LASSERT(descr->cld_obj == NULL);
+			LASSERT(!descr->cld_obj);
 			descr->cld_obj   = lovsub2cl(r0->lo_sub[i]);
 			descr->cld_start = cl_index(descr->cld_obj, start);
 			descr->cld_end   = cl_index(descr->cld_obj, end);
@@ -369,7 +369,6 @@ static int lov_sublock_release(const struct lu_env *env, struct lov_lock *lck,
 		struct cl_lock    *sublock;
 		int dying;
 
-		LASSERT(lck->lls_sub[i].sub_lock != NULL);
 		sublock = lck->lls_sub[i].sub_lock->lss_cl.cls_lock;
 		LASSERT(cl_lock_is_mutexed(sublock));
 
@@ -413,7 +412,6 @@ static void lov_sublock_hold(const struct lu_env *env, struct lov_lock *lck,
 	if (!(lck->lls_sub[i].sub_flags & LSF_HELD)) {
 		struct cl_lock *sublock;
 
-		LASSERT(lck->lls_sub[i].sub_lock != NULL);
 		sublock = lck->lls_sub[i].sub_lock->lss_cl.cls_lock;
 		LASSERT(cl_lock_is_mutexed(sublock));
 		LASSERT(sublock->cll_state != CLS_FREEING);
@@ -435,13 +433,13 @@ static void lov_lock_fini(const struct lu_env *env,
 
 	lck = cl2lov_lock(slice);
 	LASSERT(lck->lls_nr_filled == 0);
-	if (lck->lls_sub != NULL) {
+	if (lck->lls_sub) {
 		for (i = 0; i < lck->lls_nr; ++i)
 			/*
 			 * No sub-locks exists at this point, as sub-lock has
 			 * a reference on its parent.
 			 */
-			LASSERT(lck->lls_sub[i].sub_lock == NULL);
+			LASSERT(!lck->lls_sub[i].sub_lock);
 		kvfree(lck->lls_sub);
 	}
 	kmem_cache_free(lov_lock_kmem, lck);
@@ -515,7 +513,7 @@ static int lov_sublock_fill(const struct lu_env *env, struct cl_lock *parent,
 	if (!IS_ERR(sublock)) {
 		cl_lock_get_trust(sublock);
 		if (parent->cll_state == CLS_QUEUING &&
-		    lck->lls_sub[idx].sub_lock == NULL) {
+		    !lck->lls_sub[idx].sub_lock) {
 			lov_sublock_adopt(env, lck, sublock, idx, link);
 		} else {
 			kmem_cache_free(lov_lock_link_kmem, link);
@@ -574,7 +572,7 @@ static int lov_lock_enqueue(const struct lu_env *env,
 		 * Sub-lock might have been canceled, while top-lock was
 		 * cached.
 		 */
-		if (sub == NULL) {
+		if (!sub) {
 			result = lov_sublock_fill(env, lock, io, lck, i);
 			/* lov_sublock_fill() released @lock mutex,
 			 * restart. */
@@ -620,7 +618,7 @@ static int lov_lock_enqueue(const struct lu_env *env,
 					break;
 				}
 			} else {
-				LASSERT(sublock->cll_conflict == NULL);
+				LASSERT(!sublock->cll_conflict);
 				lov_sublock_unlock(env, sub, closure, subenv);
 			}
 		}
@@ -653,7 +651,7 @@ static int lov_lock_unuse(const struct lu_env *env,
 		LASSERT(slice->cls_lock->cll_state == CLS_INTRANSIT);
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		if (sub == NULL)
+		if (!sub)
 			continue;
 
 		sublock = sub->lss_cl.cls_lock;
@@ -698,7 +696,7 @@ static void lov_lock_cancel(const struct lu_env *env,
 		 * to the completion. */
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		if (sub == NULL)
+		if (!sub)
 			continue;
 
 		sublock = sub->lss_cl.cls_lock;
@@ -757,7 +755,6 @@ again:
 
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		LASSERT(sub != NULL);
 		sublock = sub->lss_cl.cls_lock;
 		rc = lov_sublock_lock(env, lck, lls, closure, &subenv);
 		if (rc == 0) {
@@ -805,7 +802,7 @@ static int lov_lock_use(const struct lu_env *env,
 
 		lls = &lck->lls_sub[i];
 		sub = lls->sub_lock;
-		if (sub == NULL) {
+		if (!sub) {
 			/*
 			 * Sub-lock might have been canceled, while top-lock was
 			 * cached.
@@ -883,10 +880,10 @@ static int lov_lock_stripe_is_matching(const struct lu_env *env,
 
 		idx = lov_stripe_number(lsm, start);
 		if (idx == stripe ||
-		    unlikely(lov_r0(lov)->lo_sub[idx] == NULL)) {
+		    unlikely(!lov_r0(lov)->lo_sub[idx])) {
 			idx = lov_stripe_number(lsm, end);
 			if (idx == stripe ||
-			    unlikely(lov_r0(lov)->lo_sub[idx] == NULL))
+			    unlikely(!lov_r0(lov)->lo_sub[idx]))
 				result = 1;
 		}
 	}
@@ -1035,7 +1032,7 @@ static void lov_lock_delete(const struct lu_env *env,
 		struct lov_lock_sub *lls = &lck->lls_sub[i];
 		struct lovsub_lock  *lsl = lls->sub_lock;
 
-		if (lsl == NULL) /* already removed */
+		if (!lsl) /* already removed */
 			continue;
 
 		rc = lov_sublock_lock(env, lck, lls, closure, NULL);
@@ -1051,9 +1048,9 @@ static void lov_lock_delete(const struct lu_env *env,
 			lov_sublock_release(env, lck, i, 1, 0);
 
 		link = lov_lock_link_find(env, lck, lsl);
-		LASSERT(link != NULL);
+		LASSERT(link);
 		lov_lock_unlink(env, link, lsl);
-		LASSERT(lck->lls_sub[i].sub_lock == NULL);
+		LASSERT(!lck->lls_sub[i].sub_lock);
 
 		lov_sublock_unlock(env, lsl, closure, NULL);
 	}
@@ -1073,7 +1070,7 @@ static int lov_lock_print(const struct lu_env *env, void *cookie,
 
 		sub = &lck->lls_sub[i];
 		(*p)(env, cookie, "    %d %x: ", i, sub->sub_flags);
-		if (sub->sub_lock != NULL)
+		if (sub->sub_lock)
 			cl_lock_print(env, cookie, p,
 				      sub->sub_lock->lss_cl.cls_lock);
 		else
@@ -1101,7 +1098,7 @@ int lov_lock_init_raid0(const struct lu_env *env, struct cl_object *obj,
 	int result;
 
 	lck = kmem_cache_alloc(lov_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lck != NULL) {
+	if (lck) {
 		cl_lock_slice_add(lock, &lck->lls_cl, obj, &lov_lock_ops);
 		result = lov_lock_sub_init(env, lck, io);
 	} else
@@ -1137,7 +1134,7 @@ int lov_lock_init_empty(const struct lu_env *env, struct cl_object *obj,
 	int result = -ENOMEM;
 
 	lck = kmem_cache_alloc(lov_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lck != NULL) {
+	if (lck) {
 		cl_lock_slice_add(lock, &lck->lls_cl, obj, &lov_empty_lock_ops);
 		lck->lls_orig = lock->cll_descr;
 		result = 0;
diff --git a/drivers/staging/lustre/lustre/lov/lov_obd.c b/drivers/staging/lustre/lustre/lov/lov_obd.c
index 65077b7..2b7b8ce 100644
--- a/drivers/staging/lustre/lustre/lov/lov_obd.c
+++ b/drivers/staging/lustre/lustre/lov/lov_obd.c
@@ -358,7 +358,7 @@ static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 		 * LU-642, initially inactive OSC could miss the obd_connect,
 		 * we make up for it here.
 		 */
-		if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
+		if (ev == OBD_NOTIFY_ACTIVATE && !tgt->ltd_exp &&
 		    obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 			struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 
@@ -521,12 +521,12 @@ static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 
 	tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 					&obd->obd_uuid);
-	if (tgt_obd == NULL)
+	if (!tgt_obd)
 		return -EINVAL;
 
 	mutex_lock(&lov->lov_lock);
 
-	if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
+	if ((index < lov->lov_tgt_size) && lov->lov_tgts[index]) {
 		tgt = lov->lov_tgts[index];
 		CERROR("UUID %s already assigned at LOV target index %d\n",
 		       obd_uuid2str(&tgt->ltd_uuid), index);
@@ -543,7 +543,7 @@ static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		while (newsize < index + 1)
 			newsize <<= 1;
 		newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
-		if (newtgts == NULL) {
+		if (!newtgts) {
 			mutex_unlock(&lov->lov_lock);
 			return -ENOMEM;
 		}
@@ -613,7 +613,7 @@ static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		goto out;
 	}
 
-	if (lov->lov_cache != NULL) {
+	if (lov->lov_cache) {
 		rc = obd_set_info_async(NULL, tgt->ltd_exp,
 				sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 				sizeof(struct cl_client_cache), lov->lov_cache,
@@ -981,7 +981,7 @@ static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 
 	ost_idx = src_oa->o_nlink;
 	lsm = *ea;
-	if (lsm == NULL) {
+	if (!lsm) {
 		rc = -EINVAL;
 		goto out;
 	}
@@ -1025,8 +1025,8 @@ static int lov_create(const struct lu_env *env, struct obd_export *exp,
 	struct lov_obd *lov;
 	int rc = 0;
 
-	LASSERT(ea != NULL);
-	if (exp == NULL)
+	LASSERT(ea);
+	if (!exp)
 		return -EINVAL;
 
 	if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
@@ -1052,7 +1052,7 @@ static int lov_create(const struct lu_env *env, struct obd_export *exp,
 
 #define ASSERT_LSM_MAGIC(lsmp)						  \
 do {									    \
-	LASSERT((lsmp) != NULL);						\
+	LASSERT((lsmp));						\
 	LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||			  \
 		 (lsmp)->lsm_magic == LOV_MAGIC_V3),			    \
 		 "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);	      \
@@ -1105,10 +1105,9 @@ static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
 		}
 	}
 
-	if (rc == 0) {
-		LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
+	if (rc == 0)
 		rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
-	}
+
 	err = lov_fini_destroy_set(set);
 out:
 	obd_putref(exp->exp_obd);
@@ -1174,7 +1173,7 @@ static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
 
 	if (!list_empty(&rqset->set_requests)) {
 		LASSERT(rc == 0);
-		LASSERT(rqset->set_interpret == NULL);
+		LASSERT(!rqset->set_interpret);
 		rqset->set_interpret = lov_getattr_interpret;
 		rqset->set_arg = (void *)lovset;
 		return rc;
@@ -1262,7 +1261,7 @@ static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
 		return rc ? rc : err;
 	}
 
-	LASSERT(rqset->set_interpret == NULL);
+	LASSERT(!rqset->set_interpret);
 	rqset->set_interpret = lov_setattr_interpret;
 	rqset->set_arg = (void *)set;
 
@@ -1330,8 +1329,7 @@ static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
 	struct lov_obd *lov;
 	int rc = 0;
 
-	LASSERT(oinfo != NULL);
-	LASSERT(oinfo->oi_osfs != NULL);
+	LASSERT(oinfo->oi_osfs);
 
 	lov = &obd->u.lov;
 	rc = lov_prep_statfs_set(obd, oinfo, &set);
@@ -1355,7 +1353,7 @@ static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
 		return rc ? rc : err;
 	}
 
-	LASSERT(rqset->set_interpret == NULL);
+	LASSERT(!rqset->set_interpret);
 	rqset->set_interpret = lov_statfs_interpret;
 	rqset->set_arg = (void *)set;
 	return 0;
@@ -1371,7 +1369,7 @@ static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 	/* for obdclass we forbid using obd_statfs_rqset, but prefer using async
 	 * statfs requests */
 	set = ptlrpc_prep_set();
-	if (set == NULL)
+	if (!set)
 		return -ENOMEM;
 
 	oinfo.oi_osfs = osfs;
@@ -1503,7 +1501,7 @@ static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 						     &qctl->obd_uuid))
 					continue;
 
-				if (tgt->ltd_exp == NULL)
+				if (!tgt->ltd_exp)
 					return -EINVAL;
 
 				break;
@@ -1741,7 +1739,7 @@ static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
 		buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
 
 	fm_local = libcfs_kvzalloc(buffer_size, GFP_NOFS);
-	if (fm_local == NULL) {
+	if (!fm_local) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -2072,7 +2070,7 @@ static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	unsigned next_id = 0,  mds_con = 0;
 
 	incr = check_uuid = do_inactive = no_set = 0;
-	if (set == NULL) {
+	if (!set) {
 		no_set = 1;
 		set = ptlrpc_prep_set();
 		if (!set)
@@ -2095,7 +2093,7 @@ static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	} else if (KEY_IS(KEY_MDS_CONN)) {
 		mds_con = 1;
 	} else if (KEY_IS(KEY_CACHE_SET)) {
-		LASSERT(lov->lov_cache == NULL);
+		LASSERT(!lov->lov_cache);
 		lov->lov_cache = val;
 		do_inactive = 1;
 	}
@@ -2329,7 +2327,7 @@ static int __init lov_init(void)
 	lov_oinfo_slab = kmem_cache_create("lov_oinfo",
 					      sizeof(struct lov_oinfo),
 					      0, SLAB_HWCACHE_ALIGN, NULL);
-	if (lov_oinfo_slab == NULL) {
+	if (!lov_oinfo_slab) {
 		lu_kmem_fini(lov_caches);
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/lov/lov_object.c b/drivers/staging/lustre/lustre/lov/lov_object.c
index 3b79ebc..1922e04 100644
--- a/drivers/staging/lustre/lustre/lov/lov_object.c
+++ b/drivers/staging/lustre/lustre/lov/lov_object.c
@@ -154,7 +154,7 @@ static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
 	/* reuse ->coh_attr_guard to protect coh_parent change */
 	spin_lock(&subhdr->coh_attr_guard);
 	parent = subhdr->coh_parent;
-	if (parent == NULL) {
+	if (!parent) {
 		subhdr->coh_parent = hdr;
 		spin_unlock(&subhdr->coh_attr_guard);
 		subhdr->coh_nesting = hdr->coh_nesting + 1;
@@ -170,7 +170,7 @@ static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
 
 		spin_unlock(&subhdr->coh_attr_guard);
 		old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
-		LASSERT(old_obj != NULL);
+		LASSERT(old_obj);
 		old_lov = cl2lov(lu2cl(old_obj));
 		if (old_lov->lo_layout_invalid) {
 			/* the object's layout has already changed but isn't
@@ -212,14 +212,14 @@ static int lov_init_raid0(const struct lu_env *env,
 			 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
 	}
 
-	LASSERT(lov->lo_lsm == NULL);
+	LASSERT(!lov->lo_lsm);
 	lov->lo_lsm = lsm_addref(lsm);
 	r0->lo_nr  = lsm->lsm_stripe_count;
 	LASSERT(r0->lo_nr <= lov_targets_nr(dev));
 
 	r0->lo_sub = libcfs_kvzalloc(r0->lo_nr * sizeof(r0->lo_sub[0]),
 				     GFP_NOFS);
-	if (r0->lo_sub != NULL) {
+	if (r0->lo_sub) {
 		result = 0;
 		subconf->coc_inode = conf->coc_inode;
 		spin_lock_init(&r0->lo_sub_lock);
@@ -241,7 +241,7 @@ static int lov_init_raid0(const struct lu_env *env,
 
 			subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
 			subconf->u.coc_oinfo = oinfo;
-			LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
+			LASSERTF(subdev, "not init ost %d\n", ost_idx);
 			/* In the function below, .hs_keycmp resolves to
 			 * lu_obj_hop_keycmp() */
 			/* coverity[overrun-buffer-val] */
@@ -269,9 +269,9 @@ static int lov_init_released(const struct lu_env *env,
 {
 	struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
 
-	LASSERT(lsm != NULL);
+	LASSERT(lsm);
 	LASSERT(lsm_is_released(lsm));
-	LASSERT(lov->lo_lsm == NULL);
+	LASSERT(!lov->lo_lsm);
 
 	lov->lo_lsm = lsm_addref(lsm);
 	return 0;
@@ -332,7 +332,7 @@ static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
 		}
 		remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
 	}
-	LASSERT(r0->lo_sub[idx] == NULL);
+	LASSERT(!r0->lo_sub[idx]);
 }
 
 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
@@ -345,11 +345,11 @@ static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
 	dump_lsm(D_INODE, lsm);
 
 	lov_layout_wait(env, lov);
-	if (r0->lo_sub != NULL) {
+	if (r0->lo_sub) {
 		for (i = 0; i < r0->lo_nr; ++i) {
 			struct lovsub_object *los = r0->lo_sub[i];
 
-			if (los != NULL) {
+			if (los) {
 				cl_locks_prune(env, &los->lso_cl, 1);
 				/*
 				 * If top-level object is to be evicted from
@@ -374,7 +374,7 @@ static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
 {
 	struct lov_layout_raid0 *r0 = &state->raid0;
 
-	if (r0->lo_sub != NULL) {
+	if (r0->lo_sub) {
 		kvfree(r0->lo_sub);
 		r0->lo_sub = NULL;
 	}
@@ -412,7 +412,7 @@ static int lov_print_raid0(const struct lu_env *env, void *cookie,
 	for (i = 0; i < r0->lo_nr; ++i) {
 		struct lu_object *sub;
 
-		if (r0->lo_sub[i] != NULL) {
+		if (r0->lo_sub[i]) {
 			sub = lovsub2lu(r0->lo_sub[i]);
 			lu_object_print(env, cookie, p, sub);
 		} else {
@@ -569,7 +569,7 @@ static const struct lov_layout_operations lov_dispatch[] = {
  */
 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
 {
-	if (lsm == NULL)
+	if (!lsm)
 		return LLT_EMPTY;
 	if (lsm_is_released(lsm))
 		return LLT_RELEASED;
@@ -624,7 +624,7 @@ static void lov_conf_lock(struct lov_object *lov)
 {
 	LASSERT(lov->lo_owner != current);
 	down_write(&lov->lo_type_guard);
-	LASSERT(lov->lo_owner == NULL);
+	LASSERT(!lov->lo_owner);
 	lov->lo_owner = current;
 }
 
@@ -666,7 +666,7 @@ static int lov_layout_change(const struct lu_env *unused,
 
 	LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
 
-	if (conf->u.coc_md != NULL)
+	if (conf->u.coc_md)
 		llt = lov_type(conf->u.coc_md->lsm);
 	LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
 
@@ -689,7 +689,7 @@ static int lov_layout_change(const struct lu_env *unused,
 		old_ops->llo_fini(env, lov, &lov->u);
 
 		LASSERT(atomic_read(&lov->lo_active_ios) == 0);
-		LASSERT(hdr->coh_tree.rnode == NULL);
+		LASSERT(!hdr->coh_tree.rnode);
 		LASSERT(hdr->coh_pages == 0);
 
 		lov->lo_type = LLT_EMPTY;
@@ -767,10 +767,10 @@ static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
 
 	LASSERT(conf->coc_opc == OBJECT_CONF_SET);
 
-	if (conf->u.coc_md != NULL)
+	if (conf->u.coc_md)
 		lsm = conf->u.coc_md->lsm;
-	if ((lsm == NULL && lov->lo_lsm == NULL) ||
-	    ((lsm != NULL && lov->lo_lsm != NULL) &&
+	if ((!lsm && !lov->lo_lsm) ||
+	    ((lsm && lov->lo_lsm) &&
 	     (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
 	     (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
 		/* same version of layout */
@@ -892,7 +892,7 @@ struct lu_object *lov_object_alloc(const struct lu_env *env,
 	struct lu_object  *obj;
 
 	lov = kmem_cache_alloc(lov_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lov != NULL) {
+	if (lov) {
 		obj = lov2lu(lov);
 		lu_object_init(obj, NULL, dev);
 		lov->lo_cl.co_ops = &lov_ops;
@@ -913,7 +913,7 @@ static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
 	struct lov_stripe_md *lsm = NULL;
 
 	lov_conf_freeze(lov);
-	if (lov->lo_lsm != NULL) {
+	if (lov->lo_lsm) {
 		lsm = lsm_addref(lov->lo_lsm);
 		CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
 			lsm, atomic_read(&lsm->lsm_refc),
@@ -928,12 +928,12 @@ struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
 	struct lu_object *luobj;
 	struct lov_stripe_md *lsm = NULL;
 
-	if (clobj == NULL)
+	if (!clobj)
 		return NULL;
 
 	luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
 				 &lov_device_type);
-	if (luobj != NULL)
+	if (luobj)
 		lsm = lov_lsm_addref(lu2lov(luobj));
 	return lsm;
 }
@@ -941,7 +941,7 @@ EXPORT_SYMBOL(lov_lsm_get);
 
 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
 {
-	if (lsm != NULL)
+	if (lsm)
 		lov_free_memmd(&lsm);
 }
 EXPORT_SYMBOL(lov_lsm_put);
@@ -953,7 +953,7 @@ int lov_read_and_clear_async_rc(struct cl_object *clob)
 
 	luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
 				 &lov_device_type);
-	if (luobj != NULL) {
+	if (luobj) {
 		struct lov_object *lov = lu2lov(luobj);
 
 		lov_conf_freeze(lov);
@@ -963,7 +963,6 @@ int lov_read_and_clear_async_rc(struct cl_object *clob)
 			int i;
 
 			lsm = lov->lo_lsm;
-			LASSERT(lsm != NULL);
 			for (i = 0; i < lsm->lsm_stripe_count; i++) {
 				struct lov_oinfo *loi = lsm->lsm_oinfo[i];
 
diff --git a/drivers/staging/lustre/lustre/lov/lov_offset.c b/drivers/staging/lustre/lustre/lov/lov_offset.c
index aa520aa..5feb2e9 100644
--- a/drivers/staging/lustre/lustre/lov/lov_offset.c
+++ b/drivers/staging/lustre/lustre/lov/lov_offset.c
@@ -55,7 +55,6 @@ u64 lov_stripe_size(struct lov_stripe_md *lsm, u64 ost_size,
 	if (ost_size == 0)
 		return 0;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, NULL, &swidth);
 
 	/* lov_do_div64(a, b) returns a % b, and a = a / b */
@@ -129,8 +128,6 @@ int lov_stripe_offset(struct lov_stripe_md *lsm, u64 lov_off,
 		return 0;
 	}
 
-	LASSERT(lsm_op_find(magic) != NULL);
-
 	lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &lov_off,
 						&swidth);
 
@@ -183,7 +180,6 @@ u64 lov_size_to_stripe(struct lov_stripe_md *lsm, u64 file_size,
 	if (file_size == OBD_OBJECT_EOF)
 		return OBD_OBJECT_EOF;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &file_size,
 						&swidth);
 
@@ -252,7 +248,6 @@ int lov_stripe_number(struct lov_stripe_md *lsm, u64 lov_off)
 	u64 stripe_off, swidth;
 	int magic = lsm->lsm_magic;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	lsm_op_find(magic)->lsm_stripe_by_offset(lsm, NULL, &lov_off, &swidth);
 
 	stripe_off = lov_do_div64(lov_off, swidth);
diff --git a/drivers/staging/lustre/lustre/lov/lov_pack.c b/drivers/staging/lustre/lustre/lov/lov_pack.c
index a78211f..4680160 100644
--- a/drivers/staging/lustre/lustre/lov/lov_pack.c
+++ b/drivers/staging/lustre/lustre/lov/lov_pack.c
@@ -257,7 +257,7 @@ static int lov_verify_lmm(void *lmm, int lmm_bytes, __u16 *stripe_count)
 {
 	int rc;
 
-	if (lsm_op_find(le32_to_cpu(*(__u32 *)lmm)) == NULL) {
+	if (!lsm_op_find(le32_to_cpu(*(__u32 *)lmm))) {
 		CERROR("bad disk LOV MAGIC: 0x%08X; dumping LMM (size=%d):\n",
 		       le32_to_cpu(*(__u32 *)lmm), lmm_bytes);
 		CERROR("%*phN\n", lmm_bytes, lmm);
@@ -306,10 +306,9 @@ int lov_free_memmd(struct lov_stripe_md **lsmp)
 	*lsmp = NULL;
 	LASSERT(atomic_read(&lsm->lsm_refc) > 0);
 	refc = atomic_dec_return(&lsm->lsm_refc);
-	if (refc == 0) {
-		LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
+	if (refc == 0)
 		lsm_op_find(lsm->lsm_magic)->lsm_free(lsm);
-	}
+
 	return refc;
 }
 
@@ -359,7 +358,6 @@ int lov_unpackmd(struct obd_export *exp,  struct lov_stripe_md **lsmp,
 	if (!lmm)
 		return lsm_size;
 
-	LASSERT(lsm_op_find(magic) != NULL);
 	rc = lsm_op_find(magic)->lsm_unpackmd(lov, *lsmp, lmm);
 	if (rc) {
 		lov_free_memmd(lsmp);
diff --git a/drivers/staging/lustre/lustre/lov/lov_page.c b/drivers/staging/lustre/lustre/lov/lov_page.c
index 037ae91..17ae450 100644
--- a/drivers/staging/lustre/lustre/lov/lov_page.c
+++ b/drivers/staging/lustre/lustre/lov/lov_page.c
@@ -57,7 +57,7 @@ static int lov_page_invariant(const struct cl_page_slice *slice)
 	const struct cl_page  *page = slice->cpl_page;
 	const struct cl_page  *sub  = lov_sub_page(slice);
 
-	return ergo(sub != NULL,
+	return ergo(sub,
 		    page->cp_child == sub &&
 		    sub->cp_parent == page &&
 		    page->cp_state == sub->cp_state);
@@ -70,7 +70,7 @@ static void lov_page_fini(const struct lu_env *env,
 
 	LINVRNT(lov_page_invariant(slice));
 
-	if (sub != NULL) {
+	if (sub) {
 		LASSERT(sub->cp_state == CPS_FREEING);
 		lu_ref_del(&sub->cp_reference, "lov", sub->cp_parent);
 		sub->cp_parent = NULL;
@@ -151,7 +151,7 @@ static const struct cl_page_operations lov_page_ops = {
 static void lov_empty_page_fini(const struct lu_env *env,
 				struct cl_page_slice *slice)
 {
-	LASSERT(slice->cpl_page->cp_child == NULL);
+	LASSERT(!slice->cpl_page->cp_child);
 }
 
 int lov_page_init_raid0(const struct lu_env *env, struct cl_object *obj,
diff --git a/drivers/staging/lustre/lustre/lov/lov_pool.c b/drivers/staging/lustre/lustre/lov/lov_pool.c
index 470708c..b9d3622 100644
--- a/drivers/staging/lustre/lustre/lov/lov_pool.c
+++ b/drivers/staging/lustre/lustre/lov/lov_pool.c
@@ -64,7 +64,7 @@ void lov_pool_putref(struct pool_desc *pool)
 	if (atomic_dec_and_test(&pool->pool_refcount)) {
 		LASSERT(hlist_unhashed(&pool->pool_hash));
 		LASSERT(list_empty(&pool->pool_list));
-		LASSERT(pool->pool_debugfs_entry == NULL);
+		LASSERT(!pool->pool_debugfs_entry);
 		lov_ost_pool_free(&(pool->pool_rr.lqr_pool));
 		lov_ost_pool_free(&(pool->pool_obds));
 		kfree(pool);
@@ -227,7 +227,7 @@ static void *pool_proc_start(struct seq_file *s, loff_t *pos)
 		i = 0;
 		do {
 		     ptr = pool_proc_next(s, &iter, &i);
-		} while ((i < *pos) && (ptr != NULL));
+		} while ((i < *pos) && ptr);
 		return ptr;
 	}
 	return iter;
@@ -255,7 +255,7 @@ static int pool_proc_show(struct seq_file *s, void *v)
 	struct lov_tgt_desc *tgt;
 
 	LASSERTF(iter->magic == POOL_IT_MAGIC, "%08X", iter->magic);
-	LASSERT(iter->pool != NULL);
+	LASSERT(iter->pool);
 	LASSERT(iter->idx <= pool_tgt_count(iter->pool));
 
 	down_read(&pool_tgt_rw_sem(iter->pool));
@@ -304,7 +304,7 @@ int lov_ost_pool_init(struct ost_pool *op, unsigned int count)
 	init_rwsem(&op->op_rw_sem);
 	op->op_size = count;
 	op->op_array = kcalloc(op->op_size, sizeof(op->op_array[0]), GFP_NOFS);
-	if (op->op_array == NULL) {
+	if (!op->op_array) {
 		op->op_size = 0;
 		return -ENOMEM;
 	}
@@ -324,7 +324,7 @@ int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count)
 
 	new_size = max(min_count, 2 * op->op_size);
 	new = kcalloc(new_size, sizeof(op->op_array[0]), GFP_NOFS);
-	if (new == NULL)
+	if (!new)
 		return -ENOMEM;
 
 	/* copy old array to new one */
@@ -486,7 +486,7 @@ int lov_pool_del(struct obd_device *obd, char *poolname)
 
 	/* lookup and kill hash reference */
 	pool = cfs_hash_del_key(lov->lov_pools_hash_body, poolname);
-	if (pool == NULL)
+	if (!pool)
 		return -ENOENT;
 
 	if (!IS_ERR_OR_NULL(pool->pool_debugfs_entry)) {
@@ -517,7 +517,7 @@ int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname)
 	lov = &(obd->u.lov);
 
 	pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-	if (pool == NULL)
+	if (!pool)
 		return -ENOENT;
 
 	obd_str2uuid(&ost_uuid, ostname);
@@ -563,7 +563,7 @@ int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname)
 	lov = &(obd->u.lov);
 
 	pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-	if (pool == NULL)
+	if (!pool)
 		return -ENOENT;
 
 	obd_str2uuid(&ost_uuid, ostname);
@@ -631,10 +631,10 @@ struct pool_desc *lov_find_pool(struct lov_obd *lov, char *poolname)
 	pool = NULL;
 	if (poolname[0] != '\0') {
 		pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-		if (pool == NULL)
+		if (!pool)
 			CWARN("Request for an unknown pool ("LOV_POOLNAMEF")\n",
 			      poolname);
-		if ((pool != NULL) && (pool_tgt_count(pool) == 0)) {
+		if (pool && (pool_tgt_count(pool) == 0)) {
 			CWARN("Request for an empty pool ("LOV_POOLNAMEF")\n",
 			       poolname);
 			/* pool is ignored, so we remove ref on it */
diff --git a/drivers/staging/lustre/lustre/lov/lov_request.c b/drivers/staging/lustre/lustre/lov/lov_request.c
index 42deda7..6c5ae05 100644
--- a/drivers/staging/lustre/lustre/lov/lov_request.c
+++ b/drivers/staging/lustre/lustre/lov/lov_request.c
@@ -156,7 +156,7 @@ static int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
 
 	tgt = lov->lov_tgts[ost_idx];
 
-	if (unlikely(tgt == NULL)) {
+	if (unlikely(!tgt)) {
 		rc = 0;
 		goto out;
 	}
@@ -178,7 +178,7 @@ static int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
 				   cfs_time_seconds(1), NULL, NULL);
 
 	rc = l_wait_event(waitq, lov_check_set(lov, ost_idx), &lwi);
-	if (tgt != NULL && tgt->ltd_active)
+	if (tgt && tgt->ltd_active)
 		return 1;
 
 	return 0;
@@ -195,16 +195,14 @@ static int common_attr_done(struct lov_request_set *set)
 	struct obdo *tmp_oa;
 	int rc = 0, attrset = 0;
 
-	LASSERT(set->set_oi != NULL);
-
-	if (set->set_oi->oi_oa == NULL)
+	if (!set->set_oi->oi_oa)
 		return 0;
 
 	if (!atomic_read(&set->set_success))
 		return -EIO;
 
 	tmp_oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (tmp_oa == NULL) {
+	if (!tmp_oa) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -246,7 +244,7 @@ int lov_fini_getattr_set(struct lov_request_set *set)
 {
 	int rc = 0;
 
-	if (set == NULL)
+	if (!set)
 		return 0;
 	LASSERT(set->set_exp);
 	if (atomic_read(&set->set_completes))
@@ -312,7 +310,7 @@ int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
 
 		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
 						    GFP_NOFS | __GFP_ZERO);
-		if (req->rq_oi.oi_oa == NULL) {
+		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
 			goto out_set;
@@ -337,7 +335,7 @@ out_set:
 
 int lov_fini_destroy_set(struct lov_request_set *set)
 {
-	if (set == NULL)
+	if (!set)
 		return 0;
 	LASSERT(set->set_exp);
 	if (atomic_read(&set->set_completes)) {
@@ -368,7 +366,7 @@ int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 	set->set_oi->oi_md = lsm;
 	set->set_oi->oi_oa = src_oa;
 	set->set_oti = oti;
-	if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
+	if (oti && src_oa->o_valid & OBD_MD_FLCOOKIE)
 		set->set_cookies = oti->oti_logcookies;
 
 	for (i = 0; i < lsm->lsm_stripe_count; i++) {
@@ -395,7 +393,7 @@ int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 
 		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
 						    GFP_NOFS | __GFP_ZERO);
-		if (req->rq_oi.oi_oa == NULL) {
+		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
 			goto out_set;
@@ -419,7 +417,7 @@ int lov_fini_setattr_set(struct lov_request_set *set)
 {
 	int rc = 0;
 
-	if (set == NULL)
+	if (!set)
 		return 0;
 	LASSERT(set->set_exp);
 	if (atomic_read(&set->set_completes)) {
@@ -486,7 +484,7 @@ int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
 	set->set_exp = exp;
 	set->set_oti = oti;
 	set->set_oi = oinfo;
-	if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
+	if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
 		set->set_cookies = oti->oti_logcookies;
 
 	for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
@@ -511,7 +509,7 @@ int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
 
 		req->rq_oi.oi_oa = kmem_cache_alloc(obdo_cachep,
 						    GFP_NOFS | __GFP_ZERO);
-		if (req->rq_oi.oi_oa == NULL) {
+		if (!req->rq_oi.oi_oa) {
 			kfree(req);
 			rc = -ENOMEM;
 			goto out_set;
@@ -581,7 +579,7 @@ int lov_fini_statfs_set(struct lov_request_set *set)
 {
 	int rc = 0;
 
-	if (set == NULL)
+	if (!set)
 		return 0;
 
 	if (atomic_read(&set->set_completes)) {
@@ -718,7 +716,7 @@ int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
 	for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 		struct lov_request *req;
 
-		if (lov->lov_tgts[i] == NULL ||
+		if (!lov->lov_tgts[i] ||
 		    (!lov_check_and_wait_active(lov, i) &&
 		     (oinfo->oi_flags & OBD_STATFS_NODELAY))) {
 			CDEBUG(D_HA, "lov idx %d inactive\n", i);
diff --git a/drivers/staging/lustre/lustre/lov/lovsub_dev.c b/drivers/staging/lustre/lustre/lov/lovsub_dev.c
index f1795c3..233740c 100644
--- a/drivers/staging/lustre/lustre/lov/lovsub_dev.c
+++ b/drivers/staging/lustre/lustre/lov/lovsub_dev.c
@@ -101,7 +101,6 @@ static int lovsub_device_init(const struct lu_env *env, struct lu_device *d,
 
 	next->ld_site = d->ld_site;
 	ldt = next->ld_type;
-	LASSERT(ldt != NULL);
 	rc = ldt->ldt_ops->ldto_device_init(env, next, ldt->ldt_name, NULL);
 	if (rc) {
 		next->ld_site = NULL;
@@ -149,7 +148,7 @@ static int lovsub_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	lsr = kmem_cache_alloc(lovsub_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lsr != NULL) {
+	if (lsr) {
 		cl_req_slice_add(req, &lsr->lsrq_cl, dev, &lovsub_req_ops);
 		result = 0;
 	} else
@@ -175,7 +174,7 @@ static struct lu_device *lovsub_device_alloc(const struct lu_env *env,
 	struct lovsub_device *lsd;
 
 	lsd = kzalloc(sizeof(*lsd), GFP_NOFS);
-	if (lsd != NULL) {
+	if (lsd) {
 		int result;
 
 		result = cl_device_init(&lsd->acid_cl, t);
diff --git a/drivers/staging/lustre/lustre/lov/lovsub_lock.c b/drivers/staging/lustre/lustre/lov/lovsub_lock.c
index 1a3e30a..bd38736 100644
--- a/drivers/staging/lustre/lustre/lov/lovsub_lock.c
+++ b/drivers/staging/lustre/lustre/lov/lovsub_lock.c
@@ -429,7 +429,7 @@ static int lovsub_lock_print(const struct lu_env *env, void *cookie,
 	list_for_each_entry(scan, &sub->lss_parents, lll_list) {
 		lov = scan->lll_super;
 		(*p)(env, cookie, "[%d %p ", scan->lll_idx, lov);
-		if (lov != NULL)
+		if (lov)
 			cl_lock_descr_print(env, cookie, p,
 					    &lov->lls_cl.cls_lock->cll_descr);
 		(*p)(env, cookie, "] ");
@@ -454,7 +454,7 @@ int lovsub_lock_init(const struct lu_env *env, struct cl_object *obj,
 	int result;
 
 	lsk = kmem_cache_alloc(lovsub_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lsk != NULL) {
+	if (lsk) {
 		INIT_LIST_HEAD(&lsk->lss_parents);
 		cl_lock_slice_add(lock, &lsk->lss_cl, obj, &lovsub_lock_ops);
 		result = 0;
diff --git a/drivers/staging/lustre/lustre/lov/lovsub_object.c b/drivers/staging/lustre/lustre/lov/lovsub_object.c
index 5ba5ee1..0a9bf51 100644
--- a/drivers/staging/lustre/lustre/lov/lovsub_object.c
+++ b/drivers/staging/lustre/lustre/lov/lovsub_object.c
@@ -63,7 +63,7 @@ int lovsub_object_init(const struct lu_env *env, struct lu_object *obj,
 
 	under = &dev->acid_next->cd_lu_dev;
 	below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
-	if (below != NULL) {
+	if (below) {
 		lu_object_add(obj, below);
 		cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
 		result = 0;
@@ -144,7 +144,7 @@ struct lu_object *lovsub_object_alloc(const struct lu_env *env,
 	struct lu_object     *obj;
 
 	los = kmem_cache_alloc(lovsub_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (los != NULL) {
+	if (los) {
 		struct cl_object_header *hdr;
 
 		obj = lovsub2lu(los);
diff --git a/drivers/staging/lustre/lustre/lov/lproc_lov.c b/drivers/staging/lustre/lustre/lov/lproc_lov.c
index 337241d..bb81d04 100644
--- a/drivers/staging/lustre/lustre/lov/lproc_lov.c
+++ b/drivers/staging/lustre/lustre/lov/lproc_lov.c
@@ -46,7 +46,7 @@ static int lov_stripesize_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%llu\n", desc->ld_default_stripe_size);
 	return 0;
@@ -61,7 +61,7 @@ static ssize_t lov_stripesize_seq_write(struct file *file,
 	__u64 val;
 	int rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_u64_helper(buffer, count, &val);
 	if (rc)
@@ -79,7 +79,7 @@ static int lov_stripeoffset_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%llu\n", desc->ld_default_stripe_offset);
 	return 0;
@@ -94,7 +94,7 @@ static ssize_t lov_stripeoffset_seq_write(struct file *file,
 	__u64 val;
 	int rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_u64_helper(buffer, count, &val);
 	if (rc)
@@ -111,7 +111,7 @@ static int lov_stripetype_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%u\n", desc->ld_pattern);
 	return 0;
@@ -125,7 +125,7 @@ static ssize_t lov_stripetype_seq_write(struct file *file,
 	struct lov_desc *desc;
 	int val, rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_helper(buffer, count, &val);
 	if (rc)
@@ -143,7 +143,7 @@ static int lov_stripecount_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_desc *desc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	seq_printf(m, "%d\n", (__s16)(desc->ld_default_stripe_count + 1) - 1);
 	return 0;
@@ -157,7 +157,7 @@ static ssize_t lov_stripecount_seq_write(struct file *file,
 	struct lov_desc *desc;
 	int val, rc;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	desc = &dev->u.lov.desc;
 	rc = lprocfs_write_helper(buffer, count, &val);
 	if (rc)
@@ -199,7 +199,7 @@ static int lov_desc_uuid_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lov_obd *lov;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	lov = &dev->u.lov;
 	seq_printf(m, "%s\n", lov->desc.ld_uuid.uuid);
 	return 0;
-- 
2.1.0

[PATCH 14/45] staging/lustre/llite: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

The only exception is ll_update_inode where dropping != NULL
in the construction below would break the logic.
I guess we could change lsm != NULL to !!lsm, but that's uglier.
(lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0)

Also removed some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/llite/dcache.c       |  10 +-
 drivers/staging/lustre/lustre/llite/dir.c          |  23 ++---
 drivers/staging/lustre/lustre/llite/file.c         | 115 ++++++++++-----------
 drivers/staging/lustre/lustre/llite/llite_close.c  |  14 +--
 .../staging/lustre/lustre/llite/llite_internal.h   |  25 +++--
 drivers/staging/lustre/lustre/llite/llite_lib.c    |  61 ++++++-----
 drivers/staging/lustre/lustre/llite/llite_mmap.c   |  14 ++-
 drivers/staging/lustre/lustre/llite/llite_rmtacl.c |  10 +-
 drivers/staging/lustre/lustre/llite/lloop.c        |  17 ++-
 drivers/staging/lustre/lustre/llite/lproc_llite.c  |  12 +--
 drivers/staging/lustre/lustre/llite/namei.c        |  53 +++-------
 drivers/staging/lustre/lustre/llite/rw.c           |  23 ++---
 drivers/staging/lustre/lustre/llite/rw26.c         |  16 +--
 drivers/staging/lustre/lustre/llite/statahead.c    |  40 ++++---
 drivers/staging/lustre/lustre/llite/super25.c      |  10 +-
 drivers/staging/lustre/lustre/llite/symlink.c      |   3 +-
 drivers/staging/lustre/lustre/llite/vvp_dev.c      |  16 +--
 drivers/staging/lustre/lustre/llite/vvp_io.c       |  12 +--
 drivers/staging/lustre/lustre/llite/vvp_object.c   |   5 +-
 drivers/staging/lustre/lustre/llite/vvp_page.c     |  22 ++--
 drivers/staging/lustre/lustre/llite/xattr.c        |  21 ++--
 drivers/staging/lustre/lustre/llite/xattr_cache.c  |  16 ++-
 22 files changed, 241 insertions(+), 297 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/dcache.c b/drivers/staging/lustre/lustre/llite/dcache.c
index bc179e5..34eb17c 100644
--- a/drivers/staging/lustre/lustre/llite/dcache.c
+++ b/drivers/staging/lustre/lustre/llite/dcache.c
@@ -60,7 +60,7 @@ static void ll_release(struct dentry *de)
 {
 	struct ll_dentry_data *lld;
 
-	LASSERT(de != NULL);
+	LASSERT(de);
 	lld = ll_d2d(de);
 	if (!lld) /* NFS copies the de->d_op methods (bug 4655) */
 		return;
@@ -178,8 +178,6 @@ static int ll_ddelete(const struct dentry *de)
 
 int ll_d_init(struct dentry *de)
 {
-	LASSERT(de != NULL);
-
 	CDEBUG(D_DENTRY, "ldd on dentry %pd (%p) parent %p inode %p refc %d\n",
 		de, de, de->d_parent, d_inode(de),
 		d_count(de));
@@ -251,8 +249,6 @@ void ll_invalidate_aliases(struct inode *inode)
 {
 	struct dentry *dentry;
 
-	LASSERT(inode != NULL);
-
 	CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
 	       inode->i_ino, inode->i_generation, inode);
 
@@ -286,9 +282,7 @@ int ll_revalidate_it_finish(struct ptlrpc_request *request,
 
 void ll_lookup_finish_locks(struct lookup_intent *it, struct inode *inode)
 {
-	LASSERT(it != NULL);
-
-	if (it->d.lustre.it_lock_mode && inode != NULL) {
+	if (it->d.lustre.it_lock_mode && inode) {
 		struct ll_sb_info *sbi = ll_i2sbi(inode);
 
 		CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 36b1055..d7dc264 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -190,8 +190,6 @@ static int ll_dir_filler(void *_hash, struct page *page0)
 	} else if (rc == 0) {
 		body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
 		/* Checked by mdc_readpage() */
-		LASSERT(body != NULL);
-
 		if (body->valid & OBD_MD_FLSIZE)
 			cl_isize_write(inode, body->size);
 
@@ -245,7 +243,7 @@ void ll_release_page(struct page *page, int remove)
 	kunmap(page);
 	if (remove) {
 		lock_page(page);
-		if (likely(page->mapping != NULL))
+		if (likely(page->mapping))
 			truncate_complete_page(page->mapping, page);
 		unlock_page(page);
 	}
@@ -393,7 +391,7 @@ struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
 		CERROR("dir page locate: "DFID" at %llu: rc %ld\n",
 		       PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
 		goto out_unlock;
-	} else if (page != NULL) {
+	} else if (page) {
 		/*
 		 * XXX nikita: not entirely correct handling of a corner case:
 		 * suppose hash chain of entries with hash value HASH crosses
@@ -499,7 +497,7 @@ int ll_dir_read(struct inode *inode, struct dir_context *ctx)
 			__u64 next;
 
 			dp = page_address(page);
-			for (ent = lu_dirent_start(dp); ent != NULL && !done;
+			for (ent = lu_dirent_start(dp); ent && !done;
 			     ent = lu_dirent_next(ent)) {
 				__u16	  type;
 				int	    namelen;
@@ -689,7 +687,7 @@ int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 	struct obd_device *mgc = lsi->lsi_mgc;
 	int lum_size;
 
-	if (lump != NULL) {
+	if (lump) {
 		/*
 		 * This is coming from userspace, so should be in
 		 * local endian.  But the MDS would like it in little
@@ -725,7 +723,7 @@ int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 	if (IS_ERR(op_data))
 		return PTR_ERR(op_data);
 
-	if (lump != NULL && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
+	if (lump && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
 		op_data->op_cli_flags |= CLI_SET_MEA;
 
 	/* swabbing is done in lov_setstripe() on server side */
@@ -812,7 +810,6 @@ int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	lmmsize = body->eadatasize;
 
@@ -824,7 +821,6 @@ int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
 
 	lmm = req_capsule_server_sized_get(&req->rq_pill,
 					   &RMF_MDT_MD, lmmsize);
-	LASSERT(lmm != NULL);
 
 	/*
 	 * This is coming from the MDS, so is probably in
@@ -1326,7 +1322,7 @@ out_free:
 			return rc;
 
 		data = (void *)buf;
-		if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
+		if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
 		    data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0) {
 			rc = -EINVAL;
 			goto lmv_out_free;
@@ -1461,7 +1457,7 @@ free_lmv:
 		if (request) {
 			body = req_capsule_server_get(&request->rq_pill,
 						      &RMF_MDT_BODY);
-			LASSERT(body != NULL);
+			LASSERT(body);
 		} else {
 			goto out_req;
 		}
@@ -1539,7 +1535,7 @@ out_req:
 			return rc;
 
 		lmm = libcfs_kvzalloc(lmmsize, GFP_NOFS);
-		if (lmm == NULL)
+		if (!lmm)
 			return -ENOMEM;
 		if (copy_from_user(lmm, lum, lmmsize)) {
 			rc = -EFAULT;
@@ -1688,7 +1684,6 @@ out_quotactl:
 	    if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) {
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 
-		LASSERT(fd != NULL);
 		rc = rct_add(&sbi->ll_rct, current_pid(), arg);
 		if (!rc)
 			fd->fd_flags |= LL_FILE_RMTACL;
@@ -1757,7 +1752,7 @@ out_quotactl:
 			return -E2BIG;
 
 		hur = libcfs_kvzalloc(totalsize, GFP_NOFS);
-		if (hur == NULL)
+		if (!hur)
 			return -ENOMEM;
 
 		/* Copy the whole struct */
diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index 132d19b..8e854c8 100644
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -65,7 +65,7 @@ static struct ll_file_data *ll_file_data_get(void)
 	struct ll_file_data *fd;
 
 	fd = kmem_cache_alloc(ll_file_data_slab, GFP_NOFS | __GFP_ZERO);
-	if (fd == NULL)
+	if (!fd)
 		return NULL;
 	fd->fd_write_failed = false;
 	return fd;
@@ -73,7 +73,7 @@ static struct ll_file_data *ll_file_data_get(void)
 
 static void ll_file_data_put(struct ll_file_data *fd)
 {
-	if (fd != NULL)
+	if (fd)
 		kmem_cache_free(ll_file_data_slab, fd);
 }
 
@@ -134,7 +134,7 @@ static int ll_close_inode_openhandle(struct obd_export *md_exp,
 	int epoch_close = 1;
 	int rc;
 
-	if (obd == NULL) {
+	if (!obd) {
 		/*
 		 * XXX: in case of LMV, is this correct to access
 		 * ->exp_handle?
@@ -153,7 +153,7 @@ static int ll_close_inode_openhandle(struct obd_export *md_exp,
 	}
 
 	ll_prepare_close(inode, op_data, och);
-	if (data_version != NULL) {
+	if (data_version) {
 		/* Pass in data_version implies release. */
 		op_data->op_bias |= MDS_HSM_RELEASE;
 		op_data->op_data_version = *data_version;
@@ -251,7 +251,7 @@ int ll_md_real_close(struct inode *inode, fmode_t fmode)
 	*och_p = NULL;
 	mutex_unlock(&lli->lli_och_mutex);
 
-	if (och != NULL) {
+	if (och) {
 		/* There might be a race and this handle may already
 		   be closed. */
 		rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
@@ -276,7 +276,7 @@ static int ll_md_close(struct obd_export *md_exp, struct inode *inode,
 	if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
 		ll_put_grouplock(inode, file, fd->fd_grouplock.cg_gid);
 
-	if (fd->fd_lease_och != NULL) {
+	if (fd->fd_lease_och) {
 		bool lease_broken;
 
 		/* Usually the lease is not released when the
@@ -288,7 +288,7 @@ static int ll_md_close(struct obd_export *md_exp, struct inode *inode,
 		fd->fd_lease_och = NULL;
 	}
 
-	if (fd->fd_och != NULL) {
+	if (fd->fd_och) {
 		rc = ll_close_inode_openhandle(md_exp, inode, fd->fd_och, NULL);
 		fd->fd_och = NULL;
 		goto out;
@@ -343,7 +343,6 @@ int ll_file_release(struct inode *inode, struct file *file)
 	if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) {
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 
-		LASSERT(fd != NULL);
 		if (unlikely(fd->fd_flags & LL_FILE_RMTACL)) {
 			fd->fd_flags &= ~LL_FILE_RMTACL;
 			rct_del(&sbi->ll_rct, current_pid());
@@ -355,7 +354,7 @@ int ll_file_release(struct inode *inode, struct file *file)
 	if (!is_root_inode(inode))
 		ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
 	fd = LUSTRE_FPRIVATE(file);
-	LASSERT(fd != NULL);
+	LASSERT(fd);
 
 	/* The last ref on @file, maybe not the owner pid of statahead.
 	 * Different processes can open the same dir, "ll_opendir_key" means:
@@ -405,7 +404,7 @@ static int ll_intent_file_open(struct dentry *dentry, void *lmm,
 	 * makes a good candidate for using OPEN lock */
 	/* If lmmsize & lmm are not 0, we are just setting stripe info
 	 * parameters. No need for the open lock */
-	if (lmm == NULL && lmmsize == 0) {
+	if (!lmm && lmmsize == 0) {
 		itp->it_flags |= MDS_OPEN_LOCK;
 		if (itp->it_flags & FMODE_WRITE)
 			opc = LUSTRE_OPC_CREATE;
@@ -492,7 +491,7 @@ static int ll_local_open(struct file *file, struct lookup_intent *it,
 
 	LASSERT(!LUSTRE_FPRIVATE(file));
 
-	LASSERT(fd != NULL);
+	LASSERT(fd);
 
 	if (och) {
 		struct ptlrpc_request *req = it->d.lustre.it_data;
@@ -543,7 +542,7 @@ int ll_file_open(struct inode *inode, struct file *file)
 	file->private_data = NULL; /* prevent ll_local_open assertion */
 
 	fd = ll_file_data_get();
-	if (fd == NULL) {
+	if (!fd) {
 		rc = -ENOMEM;
 		goto out_openerr;
 	}
@@ -551,7 +550,7 @@ int ll_file_open(struct inode *inode, struct file *file)
 	fd->fd_file = file;
 	if (S_ISDIR(inode->i_mode)) {
 		spin_lock(&lli->lli_sa_lock);
-		if (lli->lli_opendir_key == NULL && lli->lli_sai == NULL &&
+		if (!lli->lli_opendir_key && !lli->lli_sai &&
 		    lli->lli_opendir_pid == 0) {
 			lli->lli_opendir_key = fd;
 			lli->lli_opendir_pid = current_pid();
@@ -752,7 +751,7 @@ ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
 	if (fmode != FMODE_WRITE && fmode != FMODE_READ)
 		return ERR_PTR(-EINVAL);
 
-	if (file != NULL) {
+	if (file) {
 		struct ll_inode_info *lli = ll_i2info(inode);
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 		struct obd_client_handle **och_p;
@@ -764,18 +763,18 @@ ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
 		/* Get the openhandle of the file */
 		rc = -EBUSY;
 		mutex_lock(&lli->lli_och_mutex);
-		if (fd->fd_lease_och != NULL) {
+		if (fd->fd_lease_och) {
 			mutex_unlock(&lli->lli_och_mutex);
 			return ERR_PTR(rc);
 		}
 
-		if (fd->fd_och == NULL) {
+		if (!fd->fd_och) {
 			if (file->f_mode & FMODE_WRITE) {
-				LASSERT(lli->lli_mds_write_och != NULL);
+				LASSERT(lli->lli_mds_write_och);
 				och_p = &lli->lli_mds_write_och;
 				och_usecount = &lli->lli_open_fd_write_count;
 			} else {
-				LASSERT(lli->lli_mds_read_och != NULL);
+				LASSERT(lli->lli_mds_read_och);
 				och_p = &lli->lli_mds_read_och;
 				och_usecount = &lli->lli_open_fd_read_count;
 			}
@@ -790,7 +789,7 @@ ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
 		if (rc < 0) /* more than 1 opener */
 			return ERR_PTR(rc);
 
-		LASSERT(fd->fd_och != NULL);
+		LASSERT(fd->fd_och);
 		old_handle = fd->fd_och->och_fh;
 	}
 
@@ -886,7 +885,7 @@ static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
 	int rc;
 
 	lock = ldlm_handle2lock(&och->och_lease_handle);
-	if (lock != NULL) {
+	if (lock) {
 		lock_res_and_lock(lock);
 		cancelled = ldlm_is_cancel(lock);
 		unlock_res_and_lock(lock);
@@ -898,7 +897,7 @@ static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
 
 	if (!cancelled)
 		ldlm_cli_cancel(&och->och_lease_handle, 0);
-	if (lease_broken != NULL)
+	if (lease_broken)
 		*lease_broken = cancelled;
 
 	rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp, inode, och,
@@ -914,7 +913,7 @@ static int ll_lsm_getattr(struct lov_stripe_md *lsm, struct obd_export *exp,
 	struct obd_info	    oinfo = { };
 	int			rc;
 
-	LASSERT(lsm != NULL);
+	LASSERT(lsm);
 
 	oinfo.oi_md = lsm;
 	oinfo.oi_oa = obdo;
@@ -933,7 +932,7 @@ static int ll_lsm_getattr(struct lov_stripe_md *lsm, struct obd_export *exp,
 	}
 
 	set = ptlrpc_prep_set();
-	if (set == NULL) {
+	if (!set) {
 		CERROR("can't allocate ptlrpc set\n");
 		rc = -ENOMEM;
 	} else {
@@ -1261,7 +1260,7 @@ static int ll_lov_recreate(struct inode *inode, struct ost_id *oi, u32 ost_idx)
 	struct lov_stripe_md *lsm = NULL, *lsm2;
 
 	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (oa == NULL)
+	if (!oa)
 		return -ENOMEM;
 
 	lsm = ccc_inode_lsm_get(inode);
@@ -1274,7 +1273,7 @@ static int ll_lov_recreate(struct inode *inode, struct ost_id *oi, u32 ost_idx)
 		   (lsm->lsm_stripe_count));
 
 	lsm2 = libcfs_kvzalloc(lsm_size, GFP_NOFS);
-	if (lsm2 == NULL) {
+	if (!lsm2) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1341,7 +1340,7 @@ int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
 	int rc = 0;
 
 	lsm = ccc_inode_lsm_get(inode);
-	if (lsm != NULL) {
+	if (lsm) {
 		ccc_inode_lsm_put(inode, lsm);
 		CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
 		       inode->i_ino);
@@ -1401,7 +1400,6 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL); /* checked by mdc_getattr_name */
 
 	lmmsize = body->eadatasize;
 
@@ -1412,7 +1410,6 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
 	}
 
 	lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
-	LASSERT(lmm != NULL);
 
 	if ((lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1)) &&
 	    (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3))) {
@@ -1469,7 +1466,7 @@ static int ll_lov_setea(struct inode *inode, struct file *file,
 		return -EPERM;
 
 	lump = libcfs_kvzalloc(lum_size, GFP_NOFS);
-	if (lump == NULL)
+	if (!lump)
 		return -ENOMEM;
 
 	if (copy_from_user(lump, (struct lov_user_md __user *)arg, lum_size)) {
@@ -1530,7 +1527,7 @@ static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
 	int rc = -ENODATA;
 
 	lsm = ccc_inode_lsm_get(inode);
-	if (lsm != NULL)
+	if (lsm)
 		rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0,
 				   lsm, (void __user *)arg);
 	ccc_inode_lsm_put(inode, lsm);
@@ -1560,7 +1557,7 @@ ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg)
 		spin_unlock(&lli->lli_lock);
 		return -EINVAL;
 	}
-	LASSERT(fd->fd_grouplock.cg_lock == NULL);
+	LASSERT(!fd->fd_grouplock.cg_lock);
 	spin_unlock(&lli->lli_lock);
 
 	rc = cl_get_grouplock(cl_i2info(inode)->lli_clob,
@@ -1597,7 +1594,7 @@ static int ll_put_grouplock(struct inode *inode, struct file *file,
 		CWARN("no group lock held\n");
 		return -EINVAL;
 	}
-	LASSERT(fd->fd_grouplock.cg_lock != NULL);
+	LASSERT(fd->fd_grouplock.cg_lock);
 
 	if (fd->fd_grouplock.cg_gid != arg) {
 		CWARN("group lock %lu doesn't match current id %lu\n",
@@ -1688,7 +1685,7 @@ static int ll_do_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
 	}
 
 	lsm = ccc_inode_lsm_get(inode);
-	if (lsm == NULL)
+	if (!lsm)
 		return -ENOENT;
 
 	/* If the stripe_count > 1 and the application does not understand
@@ -1794,7 +1791,7 @@ static int ll_ioctl_fiemap(struct inode *inode, unsigned long arg)
 					 sizeof(struct ll_fiemap_extent));
 
 	fiemap_s = libcfs_kvzalloc(num_bytes, GFP_NOFS);
-	if (fiemap_s == NULL)
+	if (!fiemap_s)
 		return -ENOMEM;
 
 	/* get the fiemap value */
@@ -1923,7 +1920,7 @@ int ll_hsm_release(struct inode *inode)
 	och = NULL;
 
 out:
-	if (och != NULL && !IS_ERR(och)) /* close the file */
+	if (och && !IS_ERR(och)) /* close the file */
 		ll_lease_close(och, inode, NULL);
 
 	return rc;
@@ -2250,7 +2247,7 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			return -EPERM;
 
 		file2 = fget(lsl.sl_fd);
-		if (file2 == NULL)
+		if (!file2)
 			return -EBADF;
 
 		rc = -EPERM;
@@ -2413,13 +2410,13 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			break;
 		case F_UNLCK:
 			mutex_lock(&lli->lli_och_mutex);
-			if (fd->fd_lease_och != NULL) {
+			if (fd->fd_lease_och) {
 				och = fd->fd_lease_och;
 				fd->fd_lease_och = NULL;
 			}
 			mutex_unlock(&lli->lli_och_mutex);
 
-			if (och != NULL) {
+			if (och) {
 				mode = och->och_flags &
 				       (FMODE_READ|FMODE_WRITE);
 				rc = ll_lease_close(och, inode, &lease_broken);
@@ -2444,12 +2441,12 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		rc = 0;
 		mutex_lock(&lli->lli_och_mutex);
-		if (fd->fd_lease_och == NULL) {
+		if (!fd->fd_lease_och) {
 			fd->fd_lease_och = och;
 			och = NULL;
 		}
 		mutex_unlock(&lli->lli_och_mutex);
-		if (och != NULL) {
+		if (och) {
 			/* impossible now that only excl is supported for now */
 			ll_lease_close(och, inode, &lease_broken);
 			rc = -EBUSY;
@@ -2462,11 +2459,11 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		rc = 0;
 		mutex_lock(&lli->lli_och_mutex);
-		if (fd->fd_lease_och != NULL) {
+		if (fd->fd_lease_och) {
 			struct obd_client_handle *och = fd->fd_lease_och;
 
 			lock = ldlm_handle2lock(&och->och_lease_handle);
-			if (lock != NULL) {
+			if (lock) {
 				lock_res_and_lock(lock);
 				if (!ldlm_is_cancel(lock))
 					rc = och->och_flags &
@@ -2867,8 +2864,6 @@ static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits)
 	struct obd_export *exp;
 	int rc = 0;
 
-	LASSERT(inode != NULL);
-
 	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%pd\n",
 	       inode->i_ino, inode->i_generation, inode, dentry);
 
@@ -3027,7 +3022,7 @@ static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 				       sizeof(struct ll_fiemap_extent));
 	fiemap = libcfs_kvzalloc(num_bytes, GFP_NOFS);
 
-	if (fiemap == NULL)
+	if (!fiemap)
 		return -ENOMEM;
 
 	fiemap->fm_flags = fieinfo->fi_flags;
@@ -3181,8 +3176,7 @@ void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
 	unsigned int size;
 	struct llioc_data *in_data = NULL;
 
-	if (cb == NULL || cmd == NULL ||
-	    count > LLIOC_MAX_CMD || count < 0)
+	if (!cb || !cmd || count > LLIOC_MAX_CMD || count < 0)
 		return NULL;
 
 	size = sizeof(*in_data) + count * sizeof(unsigned int);
@@ -3208,7 +3202,7 @@ void ll_iocontrol_unregister(void *magic)
 {
 	struct llioc_data *tmp;
 
-	if (magic == NULL)
+	if (!magic)
 		return;
 
 	down_write(&llioc.ioc_sem);
@@ -3262,7 +3256,7 @@ int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
 	struct lu_env *env;
 	int result;
 
-	if (lli->lli_clob == NULL)
+	if (!lli->lli_clob)
 		return 0;
 
 	env = cl_env_nested_get(&nest);
@@ -3275,7 +3269,7 @@ int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
 	if (conf->coc_opc == OBJECT_CONF_SET) {
 		struct ldlm_lock *lock = conf->coc_lock;
 
-		LASSERT(lock != NULL);
+		LASSERT(lock);
 		LASSERT(ldlm_has_layout(lock));
 		if (result == 0) {
 			/* it can only be allowed to match after layout is
@@ -3304,7 +3298,7 @@ static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
 	       PFID(ll_inode2fid(inode)), !!(lock->l_flags & LDLM_FL_LVB_READY),
 	       lock->l_lvb_data, lock->l_lvb_len);
 
-	if ((lock->l_lvb_data != NULL) && (lock->l_flags & LDLM_FL_LVB_READY))
+	if (lock->l_lvb_data && (lock->l_flags & LDLM_FL_LVB_READY))
 		return 0;
 
 	/* if layout lock was granted right away, the layout is returned
@@ -3321,7 +3315,7 @@ static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
 		return rc;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -3333,20 +3327,20 @@ static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
 	}
 
 	lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize);
-	if (lmm == NULL) {
+	if (!lmm) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	lvbdata = libcfs_kvzalloc(lmmsize, GFP_NOFS);
-	if (lvbdata == NULL) {
+	if (!lvbdata) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	memcpy(lvbdata, lmm, lmmsize);
 	lock_res_and_lock(lock);
-	if (lock->l_lvb_data != NULL)
+	if (lock->l_lvb_data)
 		kvfree(lock->l_lvb_data);
 
 	lock->l_lvb_data = lvbdata;
@@ -3377,7 +3371,7 @@ static int ll_layout_lock_set(struct lustre_handle *lockh, ldlm_mode_t mode,
 	LASSERT(lustre_handle_is_used(lockh));
 
 	lock = ldlm_handle2lock(lockh);
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	LASSERT(ldlm_has_layout(lock));
 
 	LDLM_DEBUG(lock, "File %p/"DFID" being reconfigured: %d.\n",
@@ -3410,12 +3404,12 @@ static int ll_layout_lock_set(struct lustre_handle *lockh, ldlm_mode_t mode,
 	 * lvb_data is immutable if the lock is held so it's safe to access it
 	 * without res lock. See the description in ldlm_lock_decref_internal()
 	 * for the condition to free lvb_data of layout lock */
-	if (lock->l_lvb_data != NULL) {
+	if (lock->l_lvb_data) {
 		rc = obd_unpackmd(sbi->ll_dt_exp, &md.lsm,
 				  lock->l_lvb_data, lock->l_lvb_len);
 		if (rc >= 0) {
 			*gen = LL_LAYOUT_GEN_EMPTY;
-			if (md.lsm != NULL)
+			if (md.lsm)
 				*gen = md.lsm->lsm_layout_gen;
 			rc = 0;
 		} else {
@@ -3436,7 +3430,7 @@ static int ll_layout_lock_set(struct lustre_handle *lockh, ldlm_mode_t mode,
 	conf.u.coc_md = &md;
 	rc = ll_layout_conf(inode, &conf);
 
-	if (md.lsm != NULL)
+	if (md.lsm)
 		obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
 
 	/* refresh layout failed, need to wait */
@@ -3537,8 +3531,7 @@ again:
 
 	rc = md_enqueue(sbi->ll_md_exp, &einfo, &it, op_data, &lockh,
 			NULL, 0, NULL, 0);
-	if (it.d.lustre.it_data != NULL)
-		ptlrpc_req_finished(it.d.lustre.it_data);
+	ptlrpc_req_finished(it.d.lustre.it_data);
 	it.d.lustre.it_data = NULL;
 
 	ll_finish_md_op_data(op_data);
diff --git a/drivers/staging/lustre/lustre/llite/llite_close.c b/drivers/staging/lustre/lustre/llite/llite_close.c
index 3f348a3..626846e 100644
--- a/drivers/staging/lustre/lustre/llite/llite_close.c
+++ b/drivers/staging/lustre/lustre/llite/llite_close.c
@@ -52,7 +52,7 @@ void vvp_write_pending(struct ccc_object *club, struct ccc_page *page)
 
 	spin_lock(&lli->lli_lock);
 	lli->lli_flags |= LLIF_SOM_DIRTY;
-	if (page != NULL && list_empty(&page->cpg_pending_linkage))
+	if (page && list_empty(&page->cpg_pending_linkage))
 		list_add(&page->cpg_pending_linkage,
 			     &club->cob_pending_list);
 	spin_unlock(&lli->lli_lock);
@@ -65,7 +65,7 @@ void vvp_write_complete(struct ccc_object *club, struct ccc_page *page)
 	int rc = 0;
 
 	spin_lock(&lli->lli_lock);
-	if (page != NULL && !list_empty(&page->cpg_pending_linkage)) {
+	if (page && !list_empty(&page->cpg_pending_linkage)) {
 		list_del_init(&page->cpg_pending_linkage);
 		rc = 1;
 	}
@@ -144,8 +144,8 @@ void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data,
 	spin_lock(&lli->lli_lock);
 	if (!(list_empty(&club->cob_pending_list))) {
 		if (!(lli->lli_flags & LLIF_EPOCH_PENDING)) {
-			LASSERT(*och != NULL);
-			LASSERT(lli->lli_pending_och == NULL);
+			LASSERT(*och);
+			LASSERT(!lli->lli_pending_och);
 			/* Inode is dirty and there is no pending write done
 			 * request yet, DONE_WRITE is to be sent later. */
 			lli->lli_flags |= LLIF_EPOCH_PENDING;
@@ -215,7 +215,7 @@ int ll_som_update(struct inode *inode, struct md_op_data *op_data)
 	struct obdo *oa;
 	int rc;
 
-	LASSERT(op_data != NULL);
+	LASSERT(op_data);
 	if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
 		CERROR("ino %lu/%u(flags %u) som valid it just after recovery\n",
 		       inode->i_ino, inode->i_generation,
@@ -266,7 +266,7 @@ static void ll_prepare_done_writing(struct inode *inode,
 {
 	ll_ioepoch_close(inode, op_data, och, LLIF_DONE_WRITING);
 	/* If there is no @och, we do not do D_W yet. */
-	if (*och == NULL)
+	if (!*och)
 		return;
 
 	ll_pack_inode2opdata(inode, op_data, &(*och)->och_fh);
@@ -289,7 +289,7 @@ static void ll_done_writing(struct inode *inode)
 
 	ll_prepare_done_writing(inode, op_data, &och);
 	/* If there is no @och, we do not do D_W yet. */
-	if (och == NULL)
+	if (!och)
 		goto out;
 
 	rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, NULL);
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
index 29c325d..7dbe86a 100644
--- a/drivers/staging/lustre/lustre/llite/llite_internal.h
+++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
@@ -913,7 +913,7 @@ static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
 	struct vvp_thread_info      *info;
 
 	info = lu_context_key_get(&env->le_ctx, &vvp_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -937,7 +937,7 @@ static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
 	struct vvp_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &vvp_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
@@ -968,7 +968,7 @@ static inline void ll_invalidate_page(struct page *vmpage)
 	loff_t offset = vmpage->index << PAGE_CACHE_SHIFT;
 
 	LASSERT(PageLocked(vmpage));
-	if (mapping == NULL)
+	if (!mapping)
 		return;
 
 	ll_teardown_mmaps(mapping, offset, offset + PAGE_CACHE_SIZE);
@@ -993,7 +993,7 @@ static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 {
 	struct obd_device *obd = sbi->ll_md_exp->exp_obd;
 
-	if (obd == NULL)
+	if (!obd)
 		LBUG();
 	return &obd->u.cli;
 }
@@ -1018,7 +1018,7 @@ static inline struct lu_fid *ll_inode2fid(struct inode *inode)
 {
 	struct lu_fid *fid;
 
-	LASSERT(inode != NULL);
+	LASSERT(inode);
 	fid = &ll_i2info(inode)->lli_fid;
 
 	return fid;
@@ -1171,8 +1171,8 @@ ll_statahead_mark(struct inode *dir, struct dentry *dentry)
 	if (lli->lli_opendir_pid != current_pid())
 		return;
 
-	LASSERT(ldd != NULL);
-	if (sai != NULL)
+	LASSERT(ldd);
+	if (sai)
 		ldd->lld_sa_generation = sai->sai_generation;
 }
 
@@ -1191,7 +1191,7 @@ d_need_statahead(struct inode *dir, struct dentry *dentryp)
 		return -EAGAIN;
 
 	/* statahead has been stopped */
-	if (lli->lli_opendir_key == NULL)
+	if (!lli->lli_opendir_key)
 		return -EAGAIN;
 
 	ldd = ll_d2d(dentryp);
@@ -1345,7 +1345,6 @@ static inline int ll_file_nolock(const struct file *file)
 	struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 	struct inode *inode = file_inode(file);
 
-	LASSERT(fd != NULL);
 	return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
 		(ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
 }
@@ -1383,7 +1382,7 @@ static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
 		it->d.lustre.it_lock_set = 1;
 	}
 
-	if (bits != NULL)
+	if (bits)
 		*bits = it->d.lustre.it_lock_bits;
 }
 
@@ -1401,14 +1400,14 @@ static inline int d_lustre_invalid(const struct dentry *dentry)
 {
 	struct ll_dentry_data *lld = ll_d2d(dentry);
 
-	return (lld == NULL) || lld->lld_invalid;
+	return !lld || lld->lld_invalid;
 }
 
 static inline void __d_lustre_invalidate(struct dentry *dentry)
 {
 	struct ll_dentry_data *lld = ll_d2d(dentry);
 
-	if (lld != NULL)
+	if (lld)
 		lld->lld_invalid = 1;
 }
 
@@ -1442,7 +1441,7 @@ static inline void d_lustre_invalidate(struct dentry *dentry, int nested)
 static inline void d_lustre_revalidate(struct dentry *dentry)
 {
 	spin_lock(&dentry->d_lock);
-	LASSERT(ll_d2d(dentry) != NULL);
+	LASSERT(ll_d2d(dentry));
 	ll_d2d(dentry)->lld_invalid = 0;
 	spin_unlock(&dentry->d_lock);
 }
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 446e4b8..4de085d 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -171,7 +171,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 		return -ENOMEM;
 	}
 
-	if (llite_root != NULL) {
+	if (llite_root) {
 		err = ldebugfs_register_mountpoint(llite_root, sb, dt, md);
 		if (err < 0)
 			CERROR("could not register mount in <debugfs>/lustre/llite\n");
@@ -493,7 +493,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 	md_free_lustre_md(sbi->ll_md_exp, &lmd);
 	ptlrpc_req_finished(request);
 
-	if (root == NULL || IS_ERR(root)) {
+	if (IS_ERR_OR_NULL(root)) {
 		if (lmd.lsm)
 			obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 #ifdef CONFIG_FS_POSIX_ACL
@@ -532,7 +532,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 				 &sbi->ll_cache, NULL);
 
 	sb->s_root = d_make_root(root);
-	if (sb->s_root == NULL) {
+	if (!sb->s_root) {
 		CERROR("%s: can't make root dentry\n",
 			ll_get_fsname(sb, NULL, 0));
 		err = -ENOMEM;
@@ -547,7 +547,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 	/* s_dev is also used in lt_compare() to compare two fs, but that is
 	 * only a node-local comparison. */
 	uuid = obd_get_uuid(sbi->ll_md_exp);
-	if (uuid != NULL) {
+	if (uuid) {
 		sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 		get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 	}
@@ -777,7 +777,7 @@ static int ll_options(char *options, int *flags)
 next:
 		/* Find next opt */
 		s2 = strchr(s1, ',');
-		if (s2 == NULL)
+		if (!s2)
 			break;
 		s1 = s2 + 1;
 	}
@@ -904,7 +904,7 @@ int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 
 	/* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 	lprof = class_get_profile(profilenm);
-	if (lprof == NULL) {
+	if (!lprof) {
 		LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be read from the MGS.  Does that filesystem exist?\n",
 				   profilenm);
 		err = -EINVAL;
@@ -1036,8 +1036,8 @@ void ll_clear_inode(struct inode *inode)
 
 	if (S_ISDIR(inode->i_mode)) {
 		/* these should have been cleared in ll_file_release */
-		LASSERT(lli->lli_opendir_key == NULL);
-		LASSERT(lli->lli_sai == NULL);
+		LASSERT(!lli->lli_opendir_key);
+		LASSERT(!lli->lli_sai);
 		LASSERT(lli->lli_opendir_pid == 0);
 	}
 
@@ -1065,7 +1065,7 @@ void ll_clear_inode(struct inode *inode)
 	ll_xattr_cache_destroy(inode);
 
 	if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
-		LASSERT(lli->lli_posix_acl == NULL);
+		LASSERT(!lli->lli_posix_acl);
 		if (lli->lli_remote_perms) {
 			free_rmtperm_hash(lli->lli_remote_perms);
 			lli->lli_remote_perms = NULL;
@@ -1074,7 +1074,7 @@ void ll_clear_inode(struct inode *inode)
 #ifdef CONFIG_FS_POSIX_ACL
 	else if (lli->lli_posix_acl) {
 		LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
-		LASSERT(lli->lli_remote_perms == NULL);
+		LASSERT(!lli->lli_remote_perms);
 		posix_acl_release(lli->lli_posix_acl);
 		lli->lli_posix_acl = NULL;
 	}
@@ -1161,7 +1161,6 @@ static int ll_setattr_done_writing(struct inode *inode,
 	struct ll_inode_info *lli = ll_i2info(inode);
 	int rc = 0;
 
-	LASSERT(op_data != NULL);
 	if (!S_ISREG(inode->i_mode))
 		return 0;
 
@@ -1514,7 +1513,7 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
 	struct ll_sb_info *sbi = ll_i2sbi(inode);
 
 	LASSERT((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
-	if (lsm != NULL) {
+	if (lsm) {
 		if (!lli->lli_has_smd &&
 		    !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
 			cl_file_inode_init(inode, md);
@@ -1689,7 +1688,7 @@ void ll_delete_inode(struct inode *inode)
 {
 	struct cl_inode_info *lli = cl_i2info(inode);
 
-	if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
+	if (S_ISREG(inode->i_mode) && lli->lli_clob)
 		/* discard all dirty pages before truncating them, required by
 		 * osc_extent implementation at LU-1030. */
 		cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
@@ -1831,7 +1830,7 @@ void ll_umount_begin(struct super_block *sb)
 	       sb->s_count, atomic_read(&sb->s_active));
 
 	obd = class_exp2obd(sbi->ll_md_exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CERROR("Invalid MDC connection handle %#llx\n",
 		       sbi->ll_md_exp->exp_handle.h_cookie);
 		return;
@@ -1839,7 +1838,7 @@ void ll_umount_begin(struct super_block *sb)
 	obd->obd_force = 1;
 
 	obd = class_exp2obd(sbi->ll_dt_exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CERROR("Invalid LOV connection handle %#llx\n",
 		       sbi->ll_dt_exp->exp_handle.h_cookie);
 		return;
@@ -1954,7 +1953,7 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 	if (*inode) {
 		ll_update_inode(*inode, &md);
 	} else {
-		LASSERT(sb != NULL);
+		LASSERT(sb);
 
 		/*
 		 * At this point server returns to client's same fid as client
@@ -1965,7 +1964,7 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 		*inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
 					     sbi->ll_flags & LL_SBI_32BIT_API),
 				 &md);
-		if (*inode == NULL || IS_ERR(*inode)) {
+		if (IS_ERR_OR_NULL(*inode)) {
 #ifdef CONFIG_FS_POSIX_ACL
 			if (md.posix_acl) {
 				posix_acl_release(md.posix_acl);
@@ -1987,13 +1986,13 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 	 * 2. layout was changed by another client
 	 * 3. proc2: refresh layout and layout lock granted
 	 * 4. proc1: to apply a stale layout */
-	if (it != NULL && it->d.lustre.it_lock_mode != 0) {
+	if (it && it->d.lustre.it_lock_mode != 0) {
 		struct lustre_handle lockh;
 		struct ldlm_lock *lock;
 
 		lockh.cookie = it->d.lustre.it_lock_handle;
 		lock = ldlm_handle2lock(&lockh);
-		LASSERT(lock != NULL);
+		LASSERT(lock);
 		if (ldlm_has_layout(lock)) {
 			struct cl_object_conf conf;
 
@@ -2008,7 +2007,7 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 	}
 
 out:
-	if (md.lsm != NULL)
+	if (md.lsm)
 		obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
 	md_free_lustre_md(sbi->ll_md_exp, &md);
 
@@ -2113,15 +2112,13 @@ struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
 				       const char *name, int namelen,
 				       int mode, __u32 opc, void *data)
 {
-	LASSERT(i1 != NULL);
-
 	if (namelen > ll_i2sbi(i1)->ll_namelen)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	if (op_data == NULL)
+	if (!op_data)
 		op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 
-	if (op_data == NULL)
+	if (!op_data)
 		return ERR_PTR(-ENOMEM);
 
 	ll_i2gids(op_data->op_suppgids, i1, i2);
@@ -2141,8 +2138,8 @@ struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
 	op_data->op_cap = cfs_curproc_cap_pack();
 	op_data->op_bias = 0;
 	op_data->op_cli_flags = 0;
-	if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
-	     filename_is_volatile(name, namelen, NULL))
+	if ((opc == LUSTRE_OPC_CREATE) && name &&
+	    filename_is_volatile(name, namelen, NULL))
 		op_data->op_bias |= MDS_CREATE_VOLATILE;
 	op_data->op_opc = opc;
 	op_data->op_mds = 0;
@@ -2177,7 +2174,7 @@ int ll_show_options(struct seq_file *seq, struct dentry *dentry)
 {
 	struct ll_sb_info *sbi;
 
-	LASSERT((seq != NULL) && (dentry != NULL));
+	LASSERT(seq && dentry);
 	sbi = ll_s2sbi(dentry->d_sb);
 
 	if (sbi->ll_flags & LL_SBI_NOLCK)
@@ -2238,7 +2235,7 @@ char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
 	char *ptr;
 	int len;
 
-	if (buf == NULL) {
+	if (!buf) {
 		/* this means the caller wants to use static buffer
 		 * and it doesn't care about race. Usually this is
 		 * in error reporting path */
@@ -2267,9 +2264,9 @@ void ll_dirty_page_discard_warn(struct page *page, int ioret)
 
 	/* this can be called inside spin lock so use GFP_ATOMIC. */
 	buf = (char *)__get_free_page(GFP_ATOMIC);
-	if (buf != NULL) {
+	if (buf) {
 		dentry = d_find_alias(page->mapping->host);
-		if (dentry != NULL)
+		if (dentry)
 			path = dentry_path_raw(dentry, buf, PAGE_SIZE);
 	}
 
@@ -2280,9 +2277,9 @@ void ll_dirty_page_discard_warn(struct page *page, int ioret)
 	       PFID(&obj->cob_header.coh_lu.loh_fid),
 	       (path && !IS_ERR(path)) ? path : "", ioret);
 
-	if (dentry != NULL)
+	if (dentry)
 		dput(dentry);
 
-	if (buf != NULL)
+	if (buf)
 		free_page((unsigned long)buf);
 }
diff --git a/drivers/staging/lustre/lustre/llite/llite_mmap.c b/drivers/staging/lustre/lustre/llite/llite_mmap.c
index bbae95c..a0a58fd 100644
--- a/drivers/staging/lustre/lustre/llite/llite_mmap.c
+++ b/drivers/staging/lustre/lustre/llite/llite_mmap.c
@@ -72,7 +72,7 @@ struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
 	LASSERT(!down_write_trylock(&mm->mmap_sem));
 
 	for (vma = find_vma(mm, addr);
-	    vma != NULL && vma->vm_start < (addr + count); vma = vma->vm_next) {
+	    vma && vma->vm_start < (addr + count); vma = vma->vm_next) {
 		if (vma->vm_ops && vma->vm_ops == &ll_file_vm_ops &&
 		    vma->vm_flags & VM_SHARED) {
 			ret = vma;
@@ -125,7 +125,7 @@ ll_fault_io_init(struct vm_area_struct *vma, struct lu_env **env_ret,
 
 	io = ccc_env_thread_io(env);
 	io->ci_obj = ll_i2info(inode)->lli_clob;
-	LASSERT(io->ci_obj != NULL);
+	LASSERT(io->ci_obj);
 
 	fio = &io->u.ci_fault;
 	fio->ft_index      = index;
@@ -136,7 +136,7 @@ ll_fault_io_init(struct vm_area_struct *vma, struct lu_env **env_ret,
 	 * the kernel will not read other pages not covered by ldlm in
 	 * filemap_nopage. we do our readahead in ll_readpage.
 	 */
-	if (ra_flags != NULL)
+	if (ra_flags)
 		*ra_flags = vma->vm_flags & (VM_RAND_READ|VM_SEQ_READ);
 	vma->vm_flags &= ~VM_SEQ_READ;
 	vma->vm_flags |= VM_RAND_READ;
@@ -178,8 +178,6 @@ static int ll_page_mkwrite0(struct vm_area_struct *vma, struct page *vmpage,
 	struct inode	     *inode;
 	struct ll_inode_info     *lli;
 
-	LASSERT(vmpage != NULL);
-
 	io = ll_fault_io_init(vma, &env,  &nest, vmpage->index, NULL);
 	if (IS_ERR(io)) {
 		result = PTR_ERR(io);
@@ -217,7 +215,7 @@ static int ll_page_mkwrite0(struct vm_area_struct *vma, struct page *vmpage,
 		struct ll_inode_info *lli = ll_i2info(inode);
 
 		lock_page(vmpage);
-		if (vmpage->mapping == NULL) {
+		if (!vmpage->mapping) {
 			unlock_page(vmpage);
 
 			/* page was truncated and lock was cancelled, return
@@ -320,7 +318,7 @@ static int ll_fault0(struct vm_area_struct *vma, struct vm_fault *vmf)
 			fault_ret = vio->u.fault.fault.ft_flags;
 
 		vmpage = vio->u.fault.ft_vmpage;
-		if (result != 0 && vmpage != NULL) {
+		if (result != 0 && vmpage) {
 			page_cache_release(vmpage);
 			vmf->page = NULL;
 		}
@@ -357,7 +355,7 @@ restart:
 
 		/* check if this page has been truncated */
 		lock_page(vmpage);
-		if (unlikely(vmpage->mapping == NULL)) { /* unlucky */
+		if (unlikely(!vmpage->mapping)) { /* unlucky */
 			unlock_page(vmpage);
 			page_cache_release(vmpage);
 			vmf->page = NULL;
diff --git a/drivers/staging/lustre/lustre/llite/llite_rmtacl.c b/drivers/staging/lustre/lustre/llite/llite_rmtacl.c
index b27c3f2..63e4847 100644
--- a/drivers/staging/lustre/lustre/llite/llite_rmtacl.c
+++ b/drivers/staging/lustre/lustre/llite/llite_rmtacl.c
@@ -125,12 +125,12 @@ int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops)
 	struct rmtacl_ctl_entry *rce, *e;
 
 	rce = rce_alloc(key, ops);
-	if (rce == NULL)
+	if (!rce)
 		return -ENOMEM;
 
 	spin_lock(&rct->rct_lock);
 	e = __rct_search(rct, key);
-	if (unlikely(e != NULL)) {
+	if (unlikely(e)) {
 		CWARN("Unexpected stale rmtacl_entry found: [key: %d] [ops: %d]\n",
 		      (int)key, ops);
 		rce_free(e);
@@ -213,7 +213,7 @@ static struct eacl_entry *__et_search_del(struct eacl_table *et, pid_t key,
 	struct eacl_entry *ee;
 	struct list_head *head = &et->et_entries[ee_hashfunc(key)];
 
-	LASSERT(fid != NULL);
+	LASSERT(fid);
 	list_for_each_entry(ee, head, ee_list)
 		if (ee->ee_key == key) {
 			if (lu_fid_eq(&ee->ee_fid, fid) &&
@@ -256,12 +256,12 @@ int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type,
 	struct eacl_entry *ee, *e;
 
 	ee = ee_alloc(key, fid, type, header);
-	if (ee == NULL)
+	if (!ee)
 		return -ENOMEM;
 
 	spin_lock(&et->et_lock);
 	e = __et_search_del(et, key, fid, type);
-	if (unlikely(e != NULL)) {
+	if (unlikely(e)) {
 		CWARN("Unexpected stale eacl_entry found: [key: %d] [fid: " DFID "] [type: %d]\n",
 		      (int)key, PFID(fid), type);
 		ee_free(e);
diff --git a/drivers/staging/lustre/lustre/llite/lloop.c b/drivers/staging/lustre/lustre/llite/lloop.c
index 69c41af..20fecaf 100644
--- a/drivers/staging/lustre/lustre/llite/lloop.c
+++ b/drivers/staging/lustre/lustre/llite/lloop.c
@@ -211,9 +211,8 @@ static int do_bio_lustrebacked(struct lloop_device *lo, struct bio *head)
 		return io->ci_result;
 	io->ci_lockreq = CILR_NEVER;
 
-	LASSERT(head != NULL);
 	rw = head->bi_rw;
-	for (bio = head; bio != NULL; bio = bio->bi_next) {
+	for (bio = head; bio ; bio = bio->bi_next) {
 		LASSERT(rw == bio->bi_rw);
 
 		offset = (pgoff_t)(bio->bi_iter.bi_sector << 9) + lo->lo_offset;
@@ -297,7 +296,7 @@ static unsigned int loop_get_bio(struct lloop_device *lo, struct bio **req)
 
 	spin_lock_irq(&lo->lo_lock);
 	first = lo->lo_bio;
-	if (unlikely(first == NULL)) {
+	if (unlikely(!first)) {
 		spin_unlock_irq(&lo->lo_lock);
 		return 0;
 	}
@@ -458,7 +457,7 @@ static int loop_thread(void *data)
 			       total_count, times, total_count / times);
 		}
 
-		LASSERT(bio != NULL);
+		LASSERT(bio);
 		LASSERT(count <= atomic_read(&lo->lo_pending));
 		loop_handle_bio(lo, bio);
 		atomic_sub(count, &lo->lo_pending);
@@ -560,7 +559,7 @@ static int loop_clr_fd(struct lloop_device *lo, struct block_device *bdev,
 	if (lo->lo_refcnt > count)	/* we needed one fd for the ioctl */
 		return -EBUSY;
 
-	if (filp == NULL)
+	if (!filp)
 		return -EINVAL;
 
 	spin_lock_irq(&lo->lo_lock);
@@ -625,11 +624,11 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
 	case LL_IOC_LLOOP_INFO: {
 		struct lu_fid fid;
 
-		if (lo->lo_backing_file == NULL) {
+		if (!lo->lo_backing_file) {
 			err = -ENOENT;
 			break;
 		}
-		if (inode == NULL)
+		if (!inode)
 			inode = file_inode(lo->lo_backing_file);
 		if (lo->lo_state == LLOOP_BOUND)
 			fid = ll_i2info(inode)->lli_fid;
@@ -676,7 +675,7 @@ static enum llioc_iter lloop_ioctl(struct inode *unused, struct file *file,
 	if (magic != ll_iocontrol_magic)
 		return LLIOC_CONT;
 
-	if (disks == NULL) {
+	if (!disks) {
 		err = -ENODEV;
 		goto out1;
 	}
@@ -793,7 +792,7 @@ static int __init lloop_init(void)
 	       lloop_major, max_loop);
 
 	ll_iocontrol_magic = ll_iocontrol_register(lloop_ioctl, 2, cmdlist);
-	if (ll_iocontrol_magic == NULL)
+	if (!ll_iocontrol_magic)
 		goto out_mem1;
 
 	loop_dev = kcalloc(max_loop, sizeof(*loop_dev), GFP_KERNEL);
diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c
index 8d3c788..4d2e4b2 100644
--- a/drivers/staging/lustre/lustre/llite/lproc_llite.c
+++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c
@@ -453,7 +453,7 @@ static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 		if (diff <= 0)
 			break;
 
-		if (sbi->ll_dt_exp == NULL) { /* being initialized */
+		if (!sbi->ll_dt_exp) { /* being initialized */
 			rc = -ENODEV;
 			break;
 		}
@@ -966,9 +966,9 @@ int ldebugfs_register_mountpoint(struct dentry *parent,
 
 	name[MAX_STRING_SIZE] = '\0';
 
-	LASSERT(sbi != NULL);
-	LASSERT(mdc != NULL);
-	LASSERT(osc != NULL);
+	LASSERT(sbi);
+	LASSERT(mdc);
+	LASSERT(osc);
 
 	/* Get fsname */
 	len = strlen(lsi->lsi_lmd->lmd_profile);
@@ -1012,7 +1012,7 @@ int ldebugfs_register_mountpoint(struct dentry *parent,
 	/* File operations stats */
 	sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 					    LPROCFS_STATS_FLAG_NONE);
-	if (sbi->ll_stats == NULL) {
+	if (!sbi->ll_stats) {
 		err = -ENOMEM;
 		goto out;
 	}
@@ -1039,7 +1039,7 @@ int ldebugfs_register_mountpoint(struct dentry *parent,
 
 	sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 					       LPROCFS_STATS_FLAG_NONE);
-	if (sbi->ll_ra_stats == NULL) {
+	if (!sbi->ll_ra_stats) {
 		err = -ENOMEM;
 		goto out;
 	}
diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
index da5f443..dc16d43 100644
--- a/drivers/staging/lustre/lustre/llite/namei.c
+++ b/drivers/staging/lustre/lustre/llite/namei.c
@@ -118,7 +118,7 @@ struct inode *ll_iget(struct super_block *sb, ino_t hash,
 
 			ll_read_inode2(inode, md);
 			if (S_ISREG(inode->i_mode) &&
-			    ll_i2info(inode)->lli_clob == NULL) {
+			    !ll_i2info(inode)->lli_clob) {
 				CDEBUG(D_INODE,
 					"%s: apply lsm %p to inode "DFID".\n",
 					ll_get_fsname(sb, NULL, 0), md->lsm,
@@ -181,9 +181,9 @@ int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 
 		/* Inode is set to lock->l_resource->lr_lvb_inode
 		 * for mdc - bug 24555 */
-		LASSERT(lock->l_ast_data == NULL);
+		LASSERT(!lock->l_ast_data);
 
-		if (inode == NULL)
+		if (!inode)
 			break;
 
 		/* Invalidate all dentries associated with this inode */
@@ -260,7 +260,7 @@ int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 		}
 
 		if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
-		    inode->i_sb->s_root != NULL &&
+		    inode->i_sb->s_root &&
 		    !is_root_inode(inode))
 			ll_invalidate_aliases(inode);
 
@@ -288,12 +288,7 @@ __u32 ll_i2suppgid(struct inode *i)
  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 {
-#if 0
-	int i;
-#endif
-
-	LASSERT(i1 != NULL);
-	LASSERT(suppgids != NULL);
+	LASSERT(i1);
 
 	suppgids[0] = ll_i2suppgid(i1);
 
@@ -301,22 +296,6 @@ void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 		suppgids[1] = ll_i2suppgid(i2);
 		else
 			suppgids[1] = -1;
-
-#if 0
-	for (i = 0; i < current_ngroups; i++) {
-		if (suppgids[0] == -1) {
-			if (current_groups[i] != suppgids[1])
-				suppgids[0] = current_groups[i];
-			continue;
-		}
-		if (suppgids[1] == -1) {
-			if (current_groups[i] != suppgids[0])
-				suppgids[1] = current_groups[i];
-			continue;
-		}
-		break;
-	}
-#endif
 }
 
 /*
@@ -445,7 +424,7 @@ static int ll_lookup_it_finish(struct ptlrpc_request *request,
 		   !it_disposition(it, DISP_OPEN_CREATE)) {
 		/* With DISP_OPEN_CREATE dentry will
 		   instantiated in ll_create_it. */
-		LASSERT(d_inode(*de) == NULL);
+		LASSERT(!d_inode(*de));
 		d_instantiate(*de, inode);
 	}
 
@@ -498,7 +477,7 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 	if (d_mountpoint(dentry))
 		CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 
-	if (it == NULL || it->it_op == IT_GETXATTR)
+	if (!it || it->it_op == IT_GETXATTR)
 		it = &lookup_it;
 
 	if (it->it_op == IT_GETATTR) {
@@ -557,7 +536,7 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
  out:
 	if (req)
 		ptlrpc_req_finished(req);
-	if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
+	if (it->it_op == IT_GETATTR && (!retval || retval == dentry))
 		ll_statahead_mark(parent, dentry);
 	return retval;
 }
@@ -582,7 +561,7 @@ static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 		itp = &it;
 	de = ll_lookup_it(parent, dentry, itp, 0);
 
-	if (itp != NULL)
+	if (itp)
 		ll_intent_release(itp);
 
 	return de;
@@ -622,7 +601,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 	de = ll_lookup_it(dir, dentry, it, lookup_flags);
 	if (IS_ERR(de))
 		rc = PTR_ERR(de);
-	else if (de != NULL)
+	else if (de)
 		dentry = de;
 
 	if (!rc) {
@@ -631,7 +610,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 			rc = ll_create_it(dir, dentry, mode, it);
 			if (rc) {
 				/* We dget in ll_splice_alias. */
-				if (de != NULL)
+				if (de)
 					dput(de);
 				goto out_release;
 			}
@@ -655,7 +634,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 				/* We dget in ll_splice_alias. finish_open takes
 				 * care of dget for fd open.
 				 */
-				if (de != NULL)
+				if (de)
 					dput(de);
 			}
 		} else {
@@ -767,7 +746,7 @@ static int ll_new_node(struct inode *dir, struct dentry *dentry,
 	int tgt_len = 0;
 	int err;
 
-	if (unlikely(tgt != NULL))
+	if (unlikely(tgt))
 		tgt_len = strlen(tgt) + 1;
 
 	op_data = ll_prep_md_op_data(NULL, dir, NULL,
@@ -891,7 +870,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 	 * check it is complete and sensible. */
 	eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
 					      body->eadatasize);
-	LASSERT(eadata != NULL);
+	LASSERT(eadata);
 
 	rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
 	if (rc < 0) {
@@ -901,7 +880,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 	LASSERT(rc >= sizeof(*lsm));
 
 	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (oa == NULL) {
+	if (!oa) {
 		rc = -ENOMEM;
 		goto out_free_memmd;
 	}
@@ -917,7 +896,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 						     &RMF_LOGCOOKIES,
 						   sizeof(struct llog_cookie) *
 						     lsm->lsm_stripe_count);
-		if (oti.oti_logcookies == NULL) {
+		if (!oti.oti_logcookies) {
 			oa->o_valid &= ~OBD_MD_FLCOOKIE;
 			body->valid &= ~OBD_MD_FLCOOKIE;
 		}
diff --git a/drivers/staging/lustre/lustre/llite/rw.c b/drivers/staging/lustre/lustre/llite/rw.c
index 6b587d6..da71937 100644
--- a/drivers/staging/lustre/lustre/llite/rw.c
+++ b/drivers/staging/lustre/lustre/llite/rw.c
@@ -70,9 +70,9 @@ static void ll_cl_fini(struct ll_cl_context *lcc)
 	struct cl_page *page = lcc->lcc_page;
 
 	LASSERT(lcc->lcc_cookie == current);
-	LASSERT(env != NULL);
+	LASSERT(env);
 
-	if (page != NULL) {
+	if (page) {
 		lu_ref_del(&page->cp_reference, "cl_io", io);
 		cl_page_put(env, page);
 	}
@@ -97,7 +97,7 @@ static struct ll_cl_context *ll_cl_init(struct file *file,
 	int result = 0;
 
 	clob = ll_i2info(vmpage->mapping->host)->lli_clob;
-	LASSERT(clob != NULL);
+	LASSERT(clob);
 
 	env = cl_env_get(&refcheck);
 	if (IS_ERR(env))
@@ -111,7 +111,7 @@ static struct ll_cl_context *ll_cl_init(struct file *file,
 
 	cio = ccc_env_io(env);
 	io = cio->cui_cl.cis_io;
-	if (io == NULL && create) {
+	if (!io && create) {
 		struct inode *inode = vmpage->mapping->host;
 		loff_t pos;
 
@@ -163,12 +163,11 @@ static struct ll_cl_context *ll_cl_init(struct file *file,
 	}
 
 	lcc->lcc_io = io;
-	if (io == NULL)
+	if (!io)
 		result = -EIO;
 	if (result == 0) {
 		struct cl_page   *page;
 
-		LASSERT(io != NULL);
 		LASSERT(io->ci_state == CIS_IO_GOING);
 		LASSERT(cio->cui_fd == LUSTRE_FPRIVATE(file));
 		page = cl_page_find(env, clob, vmpage->index, vmpage,
@@ -473,7 +472,7 @@ static int ll_read_ahead_page(const struct lu_env *env, struct cl_io *io,
 	const char       *msg   = NULL;
 
 	vmpage = grab_cache_page_nowait(mapping, index);
-	if (vmpage != NULL) {
+	if (vmpage) {
 		/* Check if vmpage was truncated or reclaimed */
 		if (vmpage->mapping == mapping) {
 			page = cl_page_find(env, clob, vmpage->index,
@@ -500,7 +499,7 @@ static int ll_read_ahead_page(const struct lu_env *env, struct cl_io *io,
 		which = RA_STAT_FAILED_GRAB_PAGE;
 		msg   = "g_c_p_n failed";
 	}
-	if (msg != NULL) {
+	if (msg) {
 		ll_ra_stats_inc(mapping, which);
 		CDEBUG(D_READA, "%s\n", msg);
 	}
@@ -616,7 +615,7 @@ static int ll_read_ahead_pages(const struct lu_env *env,
 	int rc, count = 0, stride_ria;
 	unsigned long page_idx;
 
-	LASSERT(ria != NULL);
+	LASSERT(ria);
 	RIA_DEBUG(ria);
 
 	stride_ria = ria->ria_length > ria->ria_pages && ria->ria_pages > 0;
@@ -699,7 +698,7 @@ int ll_readahead(const struct lu_env *env, struct cl_io *io,
 		bead = NULL;
 
 	/* Enlarge the RA window to encompass the full read */
-	if (bead != NULL && ras->ras_window_start + ras->ras_window_len <
+	if (bead && ras->ras_window_start + ras->ras_window_len <
 	    bead->lrr_start + bead->lrr_count) {
 		ras->ras_window_len = bead->lrr_start + bead->lrr_count -
 				      ras->ras_window_start;
@@ -1100,7 +1099,7 @@ int ll_writepage(struct page *vmpage, struct writeback_control *wbc)
 	LASSERT(PageLocked(vmpage));
 	LASSERT(!PageWriteback(vmpage));
 
-	LASSERT(ll_i2dtexp(inode) != NULL);
+	LASSERT(ll_i2dtexp(inode));
 
 	env = cl_env_nested_get(&nest);
 	if (IS_ERR(env)) {
@@ -1109,7 +1108,7 @@ int ll_writepage(struct page *vmpage, struct writeback_control *wbc)
 	}
 
 	clob  = ll_i2info(inode)->lli_clob;
-	LASSERT(clob != NULL);
+	LASSERT(clob);
 
 	io = ccc_env_thread_io(env);
 	io->ci_obj = clob;
diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 711fda9..6167c9d 100644
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -92,9 +92,9 @@ static void ll_invalidatepage(struct page *vmpage, unsigned int offset,
 		if (!IS_ERR(env)) {
 			inode = vmpage->mapping->host;
 			obj = ll_i2info(inode)->lli_clob;
-			if (obj != NULL) {
+			if (obj) {
 				page = cl_vmpage_page(vmpage, obj);
-				if (page != NULL) {
+				if (page) {
 					lu_ref_add(&page->cp_reference,
 						   "delete", vmpage);
 					cl_page_delete(env, page);
@@ -128,11 +128,11 @@ static int ll_releasepage(struct page *vmpage, RELEASEPAGE_ARG_TYPE gfp_mask)
 		return 0;
 
 	mapping = vmpage->mapping;
-	if (mapping == NULL)
+	if (!mapping)
 		return 1;
 
 	obj = ll_i2info(mapping->host)->lli_clob;
-	if (obj == NULL)
+	if (!obj)
 		return 1;
 
 	/* 1 for page allocator, 1 for cl_page and 1 for page cache */
@@ -149,8 +149,8 @@ static int ll_releasepage(struct page *vmpage, RELEASEPAGE_ARG_TYPE gfp_mask)
 		return 0;
 
 	page = cl_vmpage_page(vmpage, obj);
-	result = page == NULL;
-	if (page != NULL) {
+	result = !page;
+	if (page) {
 		if (!cl_page_in_use(page)) {
 			result = 1;
 			cl_page_delete(env, page);
@@ -396,7 +396,7 @@ static ssize_t ll_direct_IO_26(struct kiocb *iocb, struct iov_iter *iter,
 	env = cl_env_get(&refcheck);
 	LASSERT(!IS_ERR(env));
 	io = ccc_env_io(env)->cui_cl.cis_io;
-	LASSERT(io != NULL);
+	LASSERT(io);
 
 	/* 0. Need locking between buffered and direct access. and race with
 	 *    size changing by concurrent truncates and writes.
@@ -461,7 +461,7 @@ out:
 			struct lov_stripe_md *lsm;
 
 			lsm = ccc_inode_lsm_get(inode);
-			LASSERT(lsm != NULL);
+			LASSERT(lsm);
 			lov_stripe_lock(lsm);
 			obd_adjust_kms(ll_i2dtexp(inode), lsm, file_offset, 0);
 			lov_stripe_unlock(lsm);
diff --git a/drivers/staging/lustre/lustre/llite/statahead.c b/drivers/staging/lustre/lustre/llite/statahead.c
index 88ffd8e..bd6a6b7 100644
--- a/drivers/staging/lustre/lustre/llite/statahead.c
+++ b/drivers/staging/lustre/lustre/llite/statahead.c
@@ -130,7 +130,7 @@ ll_sa_entry_unhash(struct ll_statahead_info *sai, struct ll_sa_entry *entry)
 static inline int agl_should_run(struct ll_statahead_info *sai,
 				 struct inode *inode)
 {
-	return (inode != NULL && S_ISREG(inode->i_mode) && sai->sai_agl_valid);
+	return (inode && S_ISREG(inode->i_mode) && sai->sai_agl_valid);
 }
 
 static inline int sa_sent_full(struct ll_statahead_info *sai)
@@ -499,7 +499,7 @@ static void ll_sai_put(struct ll_statahead_info *sai)
 			return;
 		}
 
-		LASSERT(lli->lli_opendir_key == NULL);
+		LASSERT(!lli->lli_opendir_key);
 		LASSERT(thread_is_stopped(&sai->sai_thread));
 		LASSERT(thread_is_stopped(&sai->sai_agl_thread));
 
@@ -618,13 +618,13 @@ static void ll_post_statahead(struct ll_statahead_info *sai)
 	it = &minfo->mi_it;
 	req = entry->se_req;
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	child = entry->se_inode;
-	if (child == NULL) {
+	if (!child) {
 		/*
 		 * lookup.
 		 */
@@ -705,7 +705,7 @@ static int ll_statahead_interpret(struct ptlrpc_request *req,
 
 	spin_lock(&lli->lli_sa_lock);
 	/* stale entry */
-	if (unlikely(lli->lli_sai == NULL ||
+	if (unlikely(!lli->lli_sai ||
 		     lli->lli_sai->sai_generation != minfo->mi_generation)) {
 		spin_unlock(&lli->lli_sa_lock);
 		rc = -ESTALE;
@@ -720,7 +720,7 @@ static int ll_statahead_interpret(struct ptlrpc_request *req,
 		}
 
 		entry = ll_sa_entry_get_byindex(sai, minfo->mi_cbdata);
-		if (entry == NULL) {
+		if (!entry) {
 			sai->sai_replied++;
 			spin_unlock(&lli->lli_sa_lock);
 			rc = -EIDRM;
@@ -756,7 +756,7 @@ out:
 		iput(dir);
 		kfree(minfo);
 	}
-	if (sai != NULL)
+	if (sai)
 		ll_sai_put(sai);
 	return rc;
 }
@@ -853,7 +853,7 @@ static int do_sa_revalidate(struct inode *dir, struct ll_sa_entry *entry,
 	struct ldlm_enqueue_info *einfo;
 	int rc;
 
-	if (unlikely(inode == NULL))
+	if (unlikely(!inode))
 		return 1;
 
 	if (d_mountpoint(dentry))
@@ -908,10 +908,9 @@ static void ll_statahead_one(struct dentry *parent, const char *entry_name,
 		rc = do_sa_revalidate(dir, entry, dentry);
 		if (rc == 1 && agl_should_run(sai, d_inode(dentry)))
 			ll_agl_add(sai, d_inode(dentry), entry->se_index);
-	}
 
-	if (dentry != NULL)
 		dput(dentry);
+	}
 
 	if (rc) {
 		rc1 = ll_sa_entry_to_stated(sai, entry,
@@ -1070,7 +1069,7 @@ static int ll_statahead_thread(void *arg)
 		}
 
 		dp = page_address(page);
-		for (ent = lu_dirent_start(dp); ent != NULL;
+		for (ent = lu_dirent_start(dp); ent;
 		     ent = lu_dirent_next(ent)) {
 			__u64 hash;
 			int namelen;
@@ -1274,7 +1273,7 @@ void ll_stop_statahead(struct inode *dir, void *key)
 {
 	struct ll_inode_info *lli = ll_i2info(dir);
 
-	if (unlikely(key == NULL))
+	if (unlikely(!key))
 		return;
 
 	spin_lock(&lli->lli_sa_lock);
@@ -1357,7 +1356,7 @@ static int is_first_dirent(struct inode *dir, struct dentry *dentry)
 		}
 
 		dp = page_address(page);
-		for (ent = lu_dirent_start(dp); ent != NULL;
+		for (ent = lu_dirent_start(dp); ent;
 		     ent = lu_dirent_next(ent)) {
 			__u64 hash;
 			int namelen;
@@ -1448,7 +1447,7 @@ ll_sai_unplug(struct ll_statahead_info *sai, struct ll_sa_entry *entry)
 	struct ll_sb_info    *sbi    = ll_i2sbi(sai->sai_inode);
 	int		   hit;
 
-	if (entry != NULL && entry->se_stat == SA_ENTRY_SUCC)
+	if (entry && entry->se_stat == SA_ENTRY_SUCC)
 		hit = 1;
 	else
 		hit = 0;
@@ -1540,7 +1539,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 		}
 
 		entry = ll_sa_entry_get_byname(sai, &(*dentryp)->d_name);
-		if (entry == NULL || only_unplug) {
+		if (!entry || only_unplug) {
 			ll_sai_unplug(sai, entry);
 			return entry ? 1 : -EAGAIN;
 		}
@@ -1559,8 +1558,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 			}
 		}
 
-		if (entry->se_stat == SA_ENTRY_SUCC &&
-		    entry->se_inode != NULL) {
+		if (entry->se_stat == SA_ENTRY_SUCC && entry->se_inode) {
 			struct inode *inode = entry->se_inode;
 			struct lookup_intent it = { .it_op = IT_GETATTR,
 						    .d.lustre.it_lock_handle =
@@ -1570,7 +1568,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 			rc = md_revalidate_lock(ll_i2mdexp(dir), &it,
 						ll_inode2fid(inode), &bits);
 			if (rc == 1) {
-				if (d_inode(*dentryp) == NULL) {
+				if (!d_inode(*dentryp)) {
 					struct dentry *alias;
 
 					alias = ll_splice_alias(inode,
@@ -1616,14 +1614,14 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 	}
 
 	sai = ll_sai_alloc();
-	if (sai == NULL) {
+	if (!sai) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	sai->sai_ls_all = (rc == LS_FIRST_DOT_DE);
 	sai->sai_inode = igrab(dir);
-	if (unlikely(sai->sai_inode == NULL)) {
+	if (unlikely(!sai->sai_inode)) {
 		CWARN("Do not start stat ahead on dying inode "DFID"\n",
 		      PFID(&lli->lli_fid));
 		rc = -ESTALE;
@@ -1669,7 +1667,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 		 * reference from allocation time. */
 		ll_sai_put(sai);
 		ll_sai_put(sai);
-		LASSERT(lli->lli_sai == NULL);
+		LASSERT(!lli->lli_sai);
 		return -EAGAIN;
 	}
 
diff --git a/drivers/staging/lustre/lustre/llite/super25.c b/drivers/staging/lustre/lustre/llite/super25.c
index 86c371e..cd996f6 100644
--- a/drivers/staging/lustre/lustre/llite/super25.c
+++ b/drivers/staging/lustre/lustre/llite/super25.c
@@ -54,7 +54,7 @@ static struct inode *ll_alloc_inode(struct super_block *sb)
 
 	ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
 	lli = kmem_cache_alloc(ll_inode_cachep, GFP_NOFS | __GFP_ZERO);
-	if (lli == NULL)
+	if (!lli)
 		return NULL;
 
 	inode_init_once(&lli->lli_vfs_inode);
@@ -108,26 +108,26 @@ static int __init init_lustre_lite(void)
 					    sizeof(struct ll_inode_info),
 					    0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
 					    NULL);
-	if (ll_inode_cachep == NULL)
+	if (!ll_inode_cachep)
 		goto out_cache;
 
 	ll_file_data_slab = kmem_cache_create("ll_file_data",
 						 sizeof(struct ll_file_data), 0,
 						 SLAB_HWCACHE_ALIGN, NULL);
-	if (ll_file_data_slab == NULL)
+	if (!ll_file_data_slab)
 		goto out_cache;
 
 	ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
 						  sizeof(struct ll_remote_perm),
 						      0, 0, NULL);
-	if (ll_remote_perm_cachep == NULL)
+	if (!ll_remote_perm_cachep)
 		goto out_cache;
 
 	ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
 						   REMOTE_PERM_HASHSIZE *
 						   sizeof(struct list_head),
 						   0, 0, NULL);
-	if (ll_rmtperm_hash_cachep == NULL)
+	if (!ll_rmtperm_hash_cachep)
 		goto out_cache;
 
 	llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
diff --git a/drivers/staging/lustre/lustre/llite/symlink.c b/drivers/staging/lustre/lustre/llite/symlink.c
index 2610348..c2775b6 100644
--- a/drivers/staging/lustre/lustre/llite/symlink.c
+++ b/drivers/staging/lustre/lustre/llite/symlink.c
@@ -81,7 +81,6 @@ static int ll_readlink_internal(struct inode *inode,
 	}
 
 	body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 	if ((body->valid & OBD_MD_LINKNAME) == 0) {
 		CERROR("OBD_MD_LINKNAME not set on reply\n");
 		rc = -EPROTO;
@@ -97,7 +96,7 @@ static int ll_readlink_internal(struct inode *inode,
 	}
 
 	*symname = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_MD);
-	if (*symname == NULL ||
+	if (!*symname ||
 	    strnlen(*symname, symlen) != symlen - 1) {
 		/* not full/NULL terminated */
 		CERROR("inode %lu: symlink not NULL terminated string of length %d\n",
diff --git a/drivers/staging/lustre/lustre/llite/vvp_dev.c b/drivers/staging/lustre/lustre/llite/vvp_dev.c
index fdca4ec..6075ccf 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_dev.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_dev.c
@@ -80,7 +80,7 @@ static void *vvp_key_init(const struct lu_context *ctx,
 	struct vvp_thread_info *info;
 
 	info = kmem_cache_alloc(vvp_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -99,7 +99,7 @@ static void *vvp_session_key_init(const struct lu_context *ctx,
 	struct vvp_session *session;
 
 	session = kmem_cache_alloc(vvp_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (session == NULL)
+	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;
 }
@@ -228,7 +228,7 @@ int cl_sb_fini(struct super_block *sb)
 	if (!IS_ERR(env)) {
 		cld = sbi->ll_cl;
 
-		if (cld != NULL) {
+		if (cld) {
 			cl_stack_fini(env, cld);
 			sbi->ll_cl = NULL;
 			sbi->ll_site = NULL;
@@ -325,11 +325,11 @@ static struct cl_object *vvp_pgcache_obj(const struct lu_env *env,
 
 	cfs_hash_hlist_for_each(dev->ld_site->ls_obj_hash, id->vpi_bucket,
 				vvp_pgcache_obj_get, id);
-	if (id->vpi_obj != NULL) {
+	if (id->vpi_obj) {
 		struct lu_object *lu_obj;
 
 		lu_obj = lu_object_locate(id->vpi_obj, dev->ld_type);
-		if (lu_obj != NULL) {
+		if (lu_obj) {
 			lu_object_ref_add(lu_obj, "dump", current);
 			return lu2cl(lu_obj);
 		}
@@ -355,7 +355,7 @@ static loff_t vvp_pgcache_find(const struct lu_env *env,
 		if (id.vpi_bucket >= CFS_HASH_NHLIST(site->ls_obj_hash))
 			return ~0ULL;
 		clob = vvp_pgcache_obj(env, dev, &id);
-		if (clob != NULL) {
+		if (clob) {
 			struct cl_object_header *hdr;
 			int		      nr;
 			struct cl_page	  *pg;
@@ -443,7 +443,7 @@ static int vvp_pgcache_show(struct seq_file *f, void *v)
 		vvp_pgcache_id_unpack(pos, &id);
 		sbi = f->private;
 		clob = vvp_pgcache_obj(env, &sbi->ll_cl->cd_lu_dev, &id);
-		if (clob != NULL) {
+		if (clob) {
 			hdr = cl_object_header(clob);
 
 			spin_lock(&hdr->coh_page_guard);
@@ -452,7 +452,7 @@ static int vvp_pgcache_show(struct seq_file *f, void *v)
 
 			seq_printf(f, "%8x@"DFID": ",
 				   id.vpi_index, PFID(&hdr->coh_lu.loh_fid));
-			if (page != NULL) {
+			if (page) {
 				vvp_pgcache_page_show(env, f, page);
 				cl_page_put(env, page);
 			} else
diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c
index 573ab15..f856899 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_io.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_io.c
@@ -181,7 +181,7 @@ static void vvp_io_fault_fini(const struct lu_env *env,
 
 	CLOBINVRNT(env, io->ci_obj, ccc_object_invariant(io->ci_obj));
 
-	if (page != NULL) {
+	if (page) {
 		lu_ref_del(&page->cp_reference, "fault", io);
 		cl_page_put(env, page);
 		io->u.ci_fault.ft_page = NULL;
@@ -220,11 +220,11 @@ static int vvp_mmap_locks(const struct lu_env *env,
 	if (!cl_is_normalio(env, io))
 		return 0;
 
-	if (vio->cui_iter == NULL) /* nfs or loop back device write */
+	if (!vio->cui_iter) /* nfs or loop back device write */
 		return 0;
 
 	/* No MM (e.g. NFS)? No vmas too. */
-	if (mm == NULL)
+	if (!mm)
 		return 0;
 
 	iov_for_each(iov, i, *(vio->cui_iter)) {
@@ -587,7 +587,7 @@ static int vvp_io_write_start(const struct lu_env *env,
 
 	CDEBUG(D_VFSTRACE, "write: [%lli, %lli)\n", pos, pos + (long long)cnt);
 
-	if (cio->cui_iter == NULL) /* from a temp io in ll_cl_init(). */
+	if (!cio->cui_iter) /* from a temp io in ll_cl_init(). */
 		result = 0;
 	else
 		result = generic_file_write_iter(cio->cui_iocb, cio->cui_iter);
@@ -673,7 +673,7 @@ static int vvp_io_fault_start(const struct lu_env *env,
 
 	/* must return locked page */
 	if (fio->ft_mkwrite) {
-		LASSERT(cfio->ft_vmpage != NULL);
+		LASSERT(cfio->ft_vmpage);
 		lock_page(cfio->ft_vmpage);
 	} else {
 		result = vvp_io_kernel_fault(cfio);
@@ -792,7 +792,7 @@ static int vvp_io_fault_start(const struct lu_env *env,
 
 out:
 	/* return unlocked vmpage to avoid deadlocking */
-	if (vmpage != NULL)
+	if (vmpage)
 		unlock_page(vmpage);
 	cfio->fault.ft_flags &= ~VM_FAULT_LOCKED;
 	return result;
diff --git a/drivers/staging/lustre/lustre/llite/vvp_object.c b/drivers/staging/lustre/lustre/llite/vvp_object.c
index c82714e..8d7aa74 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_object.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_object.c
@@ -147,7 +147,7 @@ static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
 	if (conf->coc_opc != OBJECT_CONF_SET)
 		return 0;
 
-	if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL) {
+	if (conf->u.coc_md && conf->u.coc_md->lsm) {
 		CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
 		       PFID(&lli->lli_fid), lli->lli_layout_gen,
 		       conf->u.coc_md->lsm->lsm_layout_gen);
@@ -186,9 +186,8 @@ struct ccc_object *cl_inode2ccc(struct inode *inode)
 	struct cl_object     *obj = lli->lli_clob;
 	struct lu_object     *lu;
 
-	LASSERT(obj != NULL);
 	lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
-	LASSERT(lu != NULL);
+	LASSERT(lu);
 	return lu2ccc(lu);
 }
 
diff --git a/drivers/staging/lustre/lustre/llite/vvp_page.c b/drivers/staging/lustre/lustre/llite/vvp_page.c
index a133475..f254ad5 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_page.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_page.c
@@ -56,7 +56,7 @@ static void vvp_page_fini_common(struct ccc_page *cp)
 {
 	struct page *vmpage = cp->cpg_page;
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	page_cache_release(vmpage);
 }
 
@@ -81,7 +81,7 @@ static int vvp_page_own(const struct lu_env *env,
 	struct ccc_page *vpg    = cl2ccc_page(slice);
 	struct page      *vmpage = vpg->cpg_page;
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	if (nonblock) {
 		if (!trylock_page(vmpage))
 			return -EAGAIN;
@@ -105,7 +105,7 @@ static void vvp_page_assume(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 	wait_on_page_writeback(vmpage);
 }
@@ -116,7 +116,7 @@ static void vvp_page_unassume(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 }
 
@@ -125,7 +125,7 @@ static void vvp_page_disown(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 
 	unlock_page(cl2vm_page(slice));
@@ -139,7 +139,7 @@ static void vvp_page_discard(const struct lu_env *env,
 	struct address_space *mapping;
 	struct ccc_page      *cpg     = cl2ccc_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 
 	mapping = vmpage->mapping;
@@ -161,7 +161,7 @@ static int vvp_page_unmap(const struct lu_env *env,
 	struct page *vmpage = cl2vm_page(slice);
 	__u64       offset;
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 
 	offset = vmpage->index << PAGE_CACHE_SHIFT;
@@ -199,7 +199,7 @@ static void vvp_page_export(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 	if (uptodate)
 		SetPageUptodate(vmpage);
@@ -290,7 +290,7 @@ static void vvp_page_completion_read(const struct lu_env *env,
 	} else
 		cp->cpg_defer_uptodate = 0;
 
-	if (page->cp_sync_io == NULL)
+	if (!page->cp_sync_io)
 		unlock_page(vmpage);
 }
 
@@ -317,7 +317,7 @@ static void vvp_page_completion_write(const struct lu_env *env,
 	cp->cpg_write_queued = 0;
 	vvp_write_complete(cl2ccc(slice->cpl_obj), cp);
 
-	if (pg->cp_sync_io != NULL) {
+	if (pg->cp_sync_io) {
 		LASSERT(PageLocked(vmpage));
 		LASSERT(!PageWriteback(vmpage));
 	} else {
@@ -385,7 +385,7 @@ static int vvp_page_print(const struct lu_env *env,
 	(*printer)(env, cookie, LUSTRE_VVP_NAME "-page@%p(%d:%d:%d) vm@%p ",
 		   vp, vp->cpg_defer_uptodate, vp->cpg_ra_used,
 		   vp->cpg_write_queued, vmpage);
-	if (vmpage != NULL) {
+	if (vmpage) {
 		(*printer)(env, cookie, "%lx %d:%d %lx %lu %slru",
 			   (long)vmpage->flags, page_count(vmpage),
 			   page_mapcount(vmpage), vmpage->private,
diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index fa477e7..8ccbf26 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -148,7 +148,7 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 	    (xattr_type == XATTR_ACL_ACCESS_T ||
 	    xattr_type == XATTR_ACL_DEFAULT_T)) {
 		rce = rct_search(&sbi->ll_rct, current_pid());
-		if (rce == NULL ||
+		if (!rce ||
 		    (rce->rce_ops != RMT_LSETFACL &&
 		    rce->rce_ops != RMT_RSETFACL))
 			return -EOPNOTSUPP;
@@ -158,7 +158,6 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 
 			ee = et_search_del(&sbi->ll_et, current_pid(),
 					   ll_inode2fid(inode), xattr_type);
-			LASSERT(ee != NULL);
 			if (valid & OBD_MD_FLXATTR) {
 				acl = lustre_acl_xattr_merge2ext(
 						(posix_acl_xattr_header *)value,
@@ -196,7 +195,7 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 	 * Release the posix ACL space.
 	 */
 	kfree(new_value);
-	if (acl != NULL)
+	if (acl)
 		lustre_ext_acl_xattr_free(acl);
 #endif
 	if (rc) {
@@ -239,10 +238,10 @@ int ll_setxattr(struct dentry *dentry, const char *name,
 		/* Attributes that are saved via getxattr will always have
 		 * the stripe_offset as 0.  Instead, the MDS should be
 		 * allowed to pick the starting OST index.   b=17846 */
-		if (lump != NULL && lump->lmm_stripe_offset == 0)
+		if (lump && lump->lmm_stripe_offset == 0)
 			lump->lmm_stripe_offset = -1;
 
-		if (lump != NULL && S_ISREG(inode->i_mode)) {
+		if (lump && S_ISREG(inode->i_mode)) {
 			int flags = FMODE_WRITE;
 			int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
 				sizeof(*lump) : sizeof(struct lov_user_md_v3);
@@ -324,7 +323,7 @@ int ll_getxattr_common(struct inode *inode, const char *name,
 	    (xattr_type == XATTR_ACL_ACCESS_T ||
 	    xattr_type == XATTR_ACL_DEFAULT_T)) {
 		rce = rct_search(&sbi->ll_rct, current_pid());
-		if (rce == NULL ||
+		if (!rce ||
 		    (rce->rce_ops != RMT_LSETFACL &&
 		    rce->rce_ops != RMT_LGETFACL &&
 		    rce->rce_ops != RMT_RSETFACL &&
@@ -365,7 +364,7 @@ do_getxattr:
 			goto out_xattr;
 
 		/* Add "system.posix_acl_access" to the list */
-		if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
+		if (lli->lli_posix_acl && valid & OBD_MD_FLXATTRLS) {
 			if (size == 0) {
 				rc += sizeof(XATTR_NAME_ACL_ACCESS);
 			} else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
@@ -487,7 +486,7 @@ ssize_t ll_getxattr(struct dentry *dentry, const char *name,
 		}
 
 		lsm = ccc_inode_lsm_get(inode);
-		if (lsm == NULL) {
+		if (!lsm) {
 			if (S_ISDIR(inode->i_mode)) {
 				rc = ll_dir_getstripe(inode, &lmm,
 						      &lmmsize, &request);
@@ -559,7 +558,7 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 	if (rc < 0)
 		goto out;
 
-	if (buffer != NULL) {
+	if (buffer) {
 		struct ll_sb_info *sbi = ll_i2sbi(inode);
 		char *xattr_name = buffer;
 		int xlen, rem = rc;
@@ -597,12 +596,12 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 		const size_t name_len   = sizeof("lov") - 1;
 		const size_t total_len  = prefix_len + name_len + 1;
 
-		if (((rc + total_len) > size) && (buffer != NULL)) {
+		if (((rc + total_len) > size) && buffer) {
 			ptlrpc_req_finished(request);
 			return -ERANGE;
 		}
 
-		if (buffer != NULL) {
+		if (buffer) {
 			buffer += rc;
 			memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
 			memcpy(buffer + prefix_len, "lov", name_len);
diff --git a/drivers/staging/lustre/lustre/llite/xattr_cache.c b/drivers/staging/lustre/lustre/llite/xattr_cache.c
index d140276..ed6e073 100644
--- a/drivers/staging/lustre/lustre/llite/xattr_cache.c
+++ b/drivers/staging/lustre/lustre/llite/xattr_cache.c
@@ -59,9 +59,6 @@ void ll_xattr_fini(void)
  */
 static void ll_xattr_cache_init(struct ll_inode_info *lli)
 {
-
-	LASSERT(lli != NULL);
-
 	INIT_LIST_HEAD(&lli->lli_xattrs);
 	lli->lli_flags |= LLIF_XATTR_CACHE;
 }
@@ -83,8 +80,7 @@ static int ll_xattr_cache_find(struct list_head *cache,
 
 	list_for_each_entry(entry, cache, xe_list) {
 		/* xattr_name == NULL means look for any entry */
-		if (xattr_name == NULL ||
-		    strcmp(xattr_name, entry->xe_name) == 0) {
+		if (!xattr_name || strcmp(xattr_name, entry->xe_name) == 0) {
 			*xattr = entry;
 			CDEBUG(D_CACHE, "find: [%s]=%.*s\n",
 			       entry->xe_name, entry->xe_vallen,
@@ -118,7 +114,7 @@ static int ll_xattr_cache_add(struct list_head *cache,
 	}
 
 	xattr = kmem_cache_alloc(xattr_kmem, GFP_NOFS | __GFP_ZERO);
-	if (xattr == NULL) {
+	if (!xattr) {
 		CDEBUG(D_CACHE, "failed to allocate xattr\n");
 		return -ENOMEM;
 	}
@@ -359,7 +355,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 	}
 
 	/* Matched but no cache? Cancelled on error by a parallel refill. */
-	if (unlikely(req == NULL)) {
+	if (unlikely(!req)) {
 		CDEBUG(D_CACHE, "cancelled by a parallel getxattr\n");
 		rc = -EIO;
 		goto out_maybe_drop;
@@ -376,7 +372,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		CERROR("no MDT BODY in the refill xattr reply\n");
 		rc = -EPROTO;
 		goto out_destroy;
@@ -388,7 +384,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 						body->aclsize);
 	xsizes = req_capsule_server_sized_get(&req->rq_pill, &RMF_EAVALS_LENS,
 					      body->max_mdsize * sizeof(__u32));
-	if (xdata == NULL || xval == NULL || xsizes == NULL) {
+	if (!xdata || !xval || !xsizes) {
 		CERROR("wrong setxattr reply\n");
 		rc = -EPROTO;
 		goto out_destroy;
@@ -404,7 +400,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 	for (i = 0; i < body->max_mdsize; i++) {
 		CDEBUG(D_CACHE, "caching [%s]=%.*s\n", xdata, *xsizes, xval);
 		/* Perform consistency checks: attr names and vals in pill */
-		if (memchr(xdata, 0, xtail - xdata) == NULL) {
+		if (!memchr(xdata, 0, xtail - xdata)) {
 			CERROR("xattr protocol violation (names are broken)\n");
 			rc = -EPROTO;
 		} else if (xval + *xsizes > xvtail) {
-- 
2.1.0

[lustre-devel] [PATCH 14/45] staging/lustre/llite: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

The only exception is ll_update_inode where dropping != NULL
in the construction below would break the logic.
I guess we could change lsm != NULL to !!lsm, but that's uglier.
(lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0)

Also removed some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/llite/dcache.c       |  10 +-
 drivers/staging/lustre/lustre/llite/dir.c          |  23 ++---
 drivers/staging/lustre/lustre/llite/file.c         | 115 ++++++++++-----------
 drivers/staging/lustre/lustre/llite/llite_close.c  |  14 +--
 .../staging/lustre/lustre/llite/llite_internal.h   |  25 +++--
 drivers/staging/lustre/lustre/llite/llite_lib.c    |  61 ++++++-----
 drivers/staging/lustre/lustre/llite/llite_mmap.c   |  14 ++-
 drivers/staging/lustre/lustre/llite/llite_rmtacl.c |  10 +-
 drivers/staging/lustre/lustre/llite/lloop.c        |  17 ++-
 drivers/staging/lustre/lustre/llite/lproc_llite.c  |  12 +--
 drivers/staging/lustre/lustre/llite/namei.c        |  53 +++-------
 drivers/staging/lustre/lustre/llite/rw.c           |  23 ++---
 drivers/staging/lustre/lustre/llite/rw26.c         |  16 +--
 drivers/staging/lustre/lustre/llite/statahead.c    |  40 ++++---
 drivers/staging/lustre/lustre/llite/super25.c      |  10 +-
 drivers/staging/lustre/lustre/llite/symlink.c      |   3 +-
 drivers/staging/lustre/lustre/llite/vvp_dev.c      |  16 +--
 drivers/staging/lustre/lustre/llite/vvp_io.c       |  12 +--
 drivers/staging/lustre/lustre/llite/vvp_object.c   |   5 +-
 drivers/staging/lustre/lustre/llite/vvp_page.c     |  22 ++--
 drivers/staging/lustre/lustre/llite/xattr.c        |  21 ++--
 drivers/staging/lustre/lustre/llite/xattr_cache.c  |  16 ++-
 22 files changed, 241 insertions(+), 297 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/dcache.c b/drivers/staging/lustre/lustre/llite/dcache.c
index bc179e5..34eb17c 100644
--- a/drivers/staging/lustre/lustre/llite/dcache.c
+++ b/drivers/staging/lustre/lustre/llite/dcache.c
@@ -60,7 +60,7 @@ static void ll_release(struct dentry *de)
 {
 	struct ll_dentry_data *lld;
 
-	LASSERT(de != NULL);
+	LASSERT(de);
 	lld = ll_d2d(de);
 	if (!lld) /* NFS copies the de->d_op methods (bug 4655) */
 		return;
@@ -178,8 +178,6 @@ static int ll_ddelete(const struct dentry *de)
 
 int ll_d_init(struct dentry *de)
 {
-	LASSERT(de != NULL);
-
 	CDEBUG(D_DENTRY, "ldd on dentry %pd (%p) parent %p inode %p refc %d\n",
 		de, de, de->d_parent, d_inode(de),
 		d_count(de));
@@ -251,8 +249,6 @@ void ll_invalidate_aliases(struct inode *inode)
 {
 	struct dentry *dentry;
 
-	LASSERT(inode != NULL);
-
 	CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
 	       inode->i_ino, inode->i_generation, inode);
 
@@ -286,9 +282,7 @@ int ll_revalidate_it_finish(struct ptlrpc_request *request,
 
 void ll_lookup_finish_locks(struct lookup_intent *it, struct inode *inode)
 {
-	LASSERT(it != NULL);
-
-	if (it->d.lustre.it_lock_mode && inode != NULL) {
+	if (it->d.lustre.it_lock_mode && inode) {
 		struct ll_sb_info *sbi = ll_i2sbi(inode);
 
 		CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 36b1055..d7dc264 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -190,8 +190,6 @@ static int ll_dir_filler(void *_hash, struct page *page0)
 	} else if (rc == 0) {
 		body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
 		/* Checked by mdc_readpage() */
-		LASSERT(body != NULL);
-
 		if (body->valid & OBD_MD_FLSIZE)
 			cl_isize_write(inode, body->size);
 
@@ -245,7 +243,7 @@ void ll_release_page(struct page *page, int remove)
 	kunmap(page);
 	if (remove) {
 		lock_page(page);
-		if (likely(page->mapping != NULL))
+		if (likely(page->mapping))
 			truncate_complete_page(page->mapping, page);
 		unlock_page(page);
 	}
@@ -393,7 +391,7 @@ struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
 		CERROR("dir page locate: "DFID" at %llu: rc %ld\n",
 		       PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
 		goto out_unlock;
-	} else if (page != NULL) {
+	} else if (page) {
 		/*
 		 * XXX nikita: not entirely correct handling of a corner case:
 		 * suppose hash chain of entries with hash value HASH crosses
@@ -499,7 +497,7 @@ int ll_dir_read(struct inode *inode, struct dir_context *ctx)
 			__u64 next;
 
 			dp = page_address(page);
-			for (ent = lu_dirent_start(dp); ent != NULL && !done;
+			for (ent = lu_dirent_start(dp); ent && !done;
 			     ent = lu_dirent_next(ent)) {
 				__u16	  type;
 				int	    namelen;
@@ -689,7 +687,7 @@ int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 	struct obd_device *mgc = lsi->lsi_mgc;
 	int lum_size;
 
-	if (lump != NULL) {
+	if (lump) {
 		/*
 		 * This is coming from userspace, so should be in
 		 * local endian.  But the MDS would like it in little
@@ -725,7 +723,7 @@ int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
 	if (IS_ERR(op_data))
 		return PTR_ERR(op_data);
 
-	if (lump != NULL && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
+	if (lump && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
 		op_data->op_cli_flags |= CLI_SET_MEA;
 
 	/* swabbing is done in lov_setstripe() on server side */
@@ -812,7 +810,6 @@ int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	lmmsize = body->eadatasize;
 
@@ -824,7 +821,6 @@ int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
 
 	lmm = req_capsule_server_sized_get(&req->rq_pill,
 					   &RMF_MDT_MD, lmmsize);
-	LASSERT(lmm != NULL);
 
 	/*
 	 * This is coming from the MDS, so is probably in
@@ -1326,7 +1322,7 @@ out_free:
 			return rc;
 
 		data = (void *)buf;
-		if (data->ioc_inlbuf1 == NULL || data->ioc_inlbuf2 == NULL ||
+		if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
 		    data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0) {
 			rc = -EINVAL;
 			goto lmv_out_free;
@@ -1461,7 +1457,7 @@ free_lmv:
 		if (request) {
 			body = req_capsule_server_get(&request->rq_pill,
 						      &RMF_MDT_BODY);
-			LASSERT(body != NULL);
+			LASSERT(body);
 		} else {
 			goto out_req;
 		}
@@ -1539,7 +1535,7 @@ out_req:
 			return rc;
 
 		lmm = libcfs_kvzalloc(lmmsize, GFP_NOFS);
-		if (lmm == NULL)
+		if (!lmm)
 			return -ENOMEM;
 		if (copy_from_user(lmm, lum, lmmsize)) {
 			rc = -EFAULT;
@@ -1688,7 +1684,6 @@ out_quotactl:
 	    if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) {
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 
-		LASSERT(fd != NULL);
 		rc = rct_add(&sbi->ll_rct, current_pid(), arg);
 		if (!rc)
 			fd->fd_flags |= LL_FILE_RMTACL;
@@ -1757,7 +1752,7 @@ out_quotactl:
 			return -E2BIG;
 
 		hur = libcfs_kvzalloc(totalsize, GFP_NOFS);
-		if (hur == NULL)
+		if (!hur)
 			return -ENOMEM;
 
 		/* Copy the whole struct */
diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index 132d19b..8e854c8 100644
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -65,7 +65,7 @@ static struct ll_file_data *ll_file_data_get(void)
 	struct ll_file_data *fd;
 
 	fd = kmem_cache_alloc(ll_file_data_slab, GFP_NOFS | __GFP_ZERO);
-	if (fd == NULL)
+	if (!fd)
 		return NULL;
 	fd->fd_write_failed = false;
 	return fd;
@@ -73,7 +73,7 @@ static struct ll_file_data *ll_file_data_get(void)
 
 static void ll_file_data_put(struct ll_file_data *fd)
 {
-	if (fd != NULL)
+	if (fd)
 		kmem_cache_free(ll_file_data_slab, fd);
 }
 
@@ -134,7 +134,7 @@ static int ll_close_inode_openhandle(struct obd_export *md_exp,
 	int epoch_close = 1;
 	int rc;
 
-	if (obd == NULL) {
+	if (!obd) {
 		/*
 		 * XXX: in case of LMV, is this correct to access
 		 * ->exp_handle?
@@ -153,7 +153,7 @@ static int ll_close_inode_openhandle(struct obd_export *md_exp,
 	}
 
 	ll_prepare_close(inode, op_data, och);
-	if (data_version != NULL) {
+	if (data_version) {
 		/* Pass in data_version implies release. */
 		op_data->op_bias |= MDS_HSM_RELEASE;
 		op_data->op_data_version = *data_version;
@@ -251,7 +251,7 @@ int ll_md_real_close(struct inode *inode, fmode_t fmode)
 	*och_p = NULL;
 	mutex_unlock(&lli->lli_och_mutex);
 
-	if (och != NULL) {
+	if (och) {
 		/* There might be a race and this handle may already
 		   be closed. */
 		rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp,
@@ -276,7 +276,7 @@ static int ll_md_close(struct obd_export *md_exp, struct inode *inode,
 	if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
 		ll_put_grouplock(inode, file, fd->fd_grouplock.cg_gid);
 
-	if (fd->fd_lease_och != NULL) {
+	if (fd->fd_lease_och) {
 		bool lease_broken;
 
 		/* Usually the lease is not released when the
@@ -288,7 +288,7 @@ static int ll_md_close(struct obd_export *md_exp, struct inode *inode,
 		fd->fd_lease_och = NULL;
 	}
 
-	if (fd->fd_och != NULL) {
+	if (fd->fd_och) {
 		rc = ll_close_inode_openhandle(md_exp, inode, fd->fd_och, NULL);
 		fd->fd_och = NULL;
 		goto out;
@@ -343,7 +343,6 @@ int ll_file_release(struct inode *inode, struct file *file)
 	if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) {
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 
-		LASSERT(fd != NULL);
 		if (unlikely(fd->fd_flags & LL_FILE_RMTACL)) {
 			fd->fd_flags &= ~LL_FILE_RMTACL;
 			rct_del(&sbi->ll_rct, current_pid());
@@ -355,7 +354,7 @@ int ll_file_release(struct inode *inode, struct file *file)
 	if (!is_root_inode(inode))
 		ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1);
 	fd = LUSTRE_FPRIVATE(file);
-	LASSERT(fd != NULL);
+	LASSERT(fd);
 
 	/* The last ref on @file, maybe not the owner pid of statahead.
 	 * Different processes can open the same dir, "ll_opendir_key" means:
@@ -405,7 +404,7 @@ static int ll_intent_file_open(struct dentry *dentry, void *lmm,
 	 * makes a good candidate for using OPEN lock */
 	/* If lmmsize & lmm are not 0, we are just setting stripe info
 	 * parameters. No need for the open lock */
-	if (lmm == NULL && lmmsize == 0) {
+	if (!lmm && lmmsize == 0) {
 		itp->it_flags |= MDS_OPEN_LOCK;
 		if (itp->it_flags & FMODE_WRITE)
 			opc = LUSTRE_OPC_CREATE;
@@ -492,7 +491,7 @@ static int ll_local_open(struct file *file, struct lookup_intent *it,
 
 	LASSERT(!LUSTRE_FPRIVATE(file));
 
-	LASSERT(fd != NULL);
+	LASSERT(fd);
 
 	if (och) {
 		struct ptlrpc_request *req = it->d.lustre.it_data;
@@ -543,7 +542,7 @@ int ll_file_open(struct inode *inode, struct file *file)
 	file->private_data = NULL; /* prevent ll_local_open assertion */
 
 	fd = ll_file_data_get();
-	if (fd == NULL) {
+	if (!fd) {
 		rc = -ENOMEM;
 		goto out_openerr;
 	}
@@ -551,7 +550,7 @@ int ll_file_open(struct inode *inode, struct file *file)
 	fd->fd_file = file;
 	if (S_ISDIR(inode->i_mode)) {
 		spin_lock(&lli->lli_sa_lock);
-		if (lli->lli_opendir_key == NULL && lli->lli_sai == NULL &&
+		if (!lli->lli_opendir_key && !lli->lli_sai &&
 		    lli->lli_opendir_pid == 0) {
 			lli->lli_opendir_key = fd;
 			lli->lli_opendir_pid = current_pid();
@@ -752,7 +751,7 @@ ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
 	if (fmode != FMODE_WRITE && fmode != FMODE_READ)
 		return ERR_PTR(-EINVAL);
 
-	if (file != NULL) {
+	if (file) {
 		struct ll_inode_info *lli = ll_i2info(inode);
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 		struct obd_client_handle **och_p;
@@ -764,18 +763,18 @@ ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
 		/* Get the openhandle of the file */
 		rc = -EBUSY;
 		mutex_lock(&lli->lli_och_mutex);
-		if (fd->fd_lease_och != NULL) {
+		if (fd->fd_lease_och) {
 			mutex_unlock(&lli->lli_och_mutex);
 			return ERR_PTR(rc);
 		}
 
-		if (fd->fd_och == NULL) {
+		if (!fd->fd_och) {
 			if (file->f_mode & FMODE_WRITE) {
-				LASSERT(lli->lli_mds_write_och != NULL);
+				LASSERT(lli->lli_mds_write_och);
 				och_p = &lli->lli_mds_write_och;
 				och_usecount = &lli->lli_open_fd_write_count;
 			} else {
-				LASSERT(lli->lli_mds_read_och != NULL);
+				LASSERT(lli->lli_mds_read_och);
 				och_p = &lli->lli_mds_read_och;
 				och_usecount = &lli->lli_open_fd_read_count;
 			}
@@ -790,7 +789,7 @@ ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode,
 		if (rc < 0) /* more than 1 opener */
 			return ERR_PTR(rc);
 
-		LASSERT(fd->fd_och != NULL);
+		LASSERT(fd->fd_och);
 		old_handle = fd->fd_och->och_fh;
 	}
 
@@ -886,7 +885,7 @@ static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
 	int rc;
 
 	lock = ldlm_handle2lock(&och->och_lease_handle);
-	if (lock != NULL) {
+	if (lock) {
 		lock_res_and_lock(lock);
 		cancelled = ldlm_is_cancel(lock);
 		unlock_res_and_lock(lock);
@@ -898,7 +897,7 @@ static int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
 
 	if (!cancelled)
 		ldlm_cli_cancel(&och->och_lease_handle, 0);
-	if (lease_broken != NULL)
+	if (lease_broken)
 		*lease_broken = cancelled;
 
 	rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp, inode, och,
@@ -914,7 +913,7 @@ static int ll_lsm_getattr(struct lov_stripe_md *lsm, struct obd_export *exp,
 	struct obd_info	    oinfo = { };
 	int			rc;
 
-	LASSERT(lsm != NULL);
+	LASSERT(lsm);
 
 	oinfo.oi_md = lsm;
 	oinfo.oi_oa = obdo;
@@ -933,7 +932,7 @@ static int ll_lsm_getattr(struct lov_stripe_md *lsm, struct obd_export *exp,
 	}
 
 	set = ptlrpc_prep_set();
-	if (set == NULL) {
+	if (!set) {
 		CERROR("can't allocate ptlrpc set\n");
 		rc = -ENOMEM;
 	} else {
@@ -1261,7 +1260,7 @@ static int ll_lov_recreate(struct inode *inode, struct ost_id *oi, u32 ost_idx)
 	struct lov_stripe_md *lsm = NULL, *lsm2;
 
 	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (oa == NULL)
+	if (!oa)
 		return -ENOMEM;
 
 	lsm = ccc_inode_lsm_get(inode);
@@ -1274,7 +1273,7 @@ static int ll_lov_recreate(struct inode *inode, struct ost_id *oi, u32 ost_idx)
 		   (lsm->lsm_stripe_count));
 
 	lsm2 = libcfs_kvzalloc(lsm_size, GFP_NOFS);
-	if (lsm2 == NULL) {
+	if (!lsm2) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1341,7 +1340,7 @@ int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry,
 	int rc = 0;
 
 	lsm = ccc_inode_lsm_get(inode);
-	if (lsm != NULL) {
+	if (lsm) {
 		ccc_inode_lsm_put(inode, lsm);
 		CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n",
 		       inode->i_ino);
@@ -1401,7 +1400,6 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL); /* checked by mdc_getattr_name */
 
 	lmmsize = body->eadatasize;
 
@@ -1412,7 +1410,6 @@ int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename,
 	}
 
 	lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize);
-	LASSERT(lmm != NULL);
 
 	if ((lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1)) &&
 	    (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3))) {
@@ -1469,7 +1466,7 @@ static int ll_lov_setea(struct inode *inode, struct file *file,
 		return -EPERM;
 
 	lump = libcfs_kvzalloc(lum_size, GFP_NOFS);
-	if (lump == NULL)
+	if (!lump)
 		return -ENOMEM;
 
 	if (copy_from_user(lump, (struct lov_user_md __user *)arg, lum_size)) {
@@ -1530,7 +1527,7 @@ static int ll_lov_getstripe(struct inode *inode, unsigned long arg)
 	int rc = -ENODATA;
 
 	lsm = ccc_inode_lsm_get(inode);
-	if (lsm != NULL)
+	if (lsm)
 		rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0,
 				   lsm, (void __user *)arg);
 	ccc_inode_lsm_put(inode, lsm);
@@ -1560,7 +1557,7 @@ ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg)
 		spin_unlock(&lli->lli_lock);
 		return -EINVAL;
 	}
-	LASSERT(fd->fd_grouplock.cg_lock == NULL);
+	LASSERT(!fd->fd_grouplock.cg_lock);
 	spin_unlock(&lli->lli_lock);
 
 	rc = cl_get_grouplock(cl_i2info(inode)->lli_clob,
@@ -1597,7 +1594,7 @@ static int ll_put_grouplock(struct inode *inode, struct file *file,
 		CWARN("no group lock held\n");
 		return -EINVAL;
 	}
-	LASSERT(fd->fd_grouplock.cg_lock != NULL);
+	LASSERT(fd->fd_grouplock.cg_lock);
 
 	if (fd->fd_grouplock.cg_gid != arg) {
 		CWARN("group lock %lu doesn't match current id %lu\n",
@@ -1688,7 +1685,7 @@ static int ll_do_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap,
 	}
 
 	lsm = ccc_inode_lsm_get(inode);
-	if (lsm == NULL)
+	if (!lsm)
 		return -ENOENT;
 
 	/* If the stripe_count > 1 and the application does not understand
@@ -1794,7 +1791,7 @@ static int ll_ioctl_fiemap(struct inode *inode, unsigned long arg)
 					 sizeof(struct ll_fiemap_extent));
 
 	fiemap_s = libcfs_kvzalloc(num_bytes, GFP_NOFS);
-	if (fiemap_s == NULL)
+	if (!fiemap_s)
 		return -ENOMEM;
 
 	/* get the fiemap value */
@@ -1923,7 +1920,7 @@ int ll_hsm_release(struct inode *inode)
 	och = NULL;
 
 out:
-	if (och != NULL && !IS_ERR(och)) /* close the file */
+	if (och && !IS_ERR(och)) /* close the file */
 		ll_lease_close(och, inode, NULL);
 
 	return rc;
@@ -2250,7 +2247,7 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			return -EPERM;
 
 		file2 = fget(lsl.sl_fd);
-		if (file2 == NULL)
+		if (!file2)
 			return -EBADF;
 
 		rc = -EPERM;
@@ -2413,13 +2410,13 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			break;
 		case F_UNLCK:
 			mutex_lock(&lli->lli_och_mutex);
-			if (fd->fd_lease_och != NULL) {
+			if (fd->fd_lease_och) {
 				och = fd->fd_lease_och;
 				fd->fd_lease_och = NULL;
 			}
 			mutex_unlock(&lli->lli_och_mutex);
 
-			if (och != NULL) {
+			if (och) {
 				mode = och->och_flags &
 				       (FMODE_READ|FMODE_WRITE);
 				rc = ll_lease_close(och, inode, &lease_broken);
@@ -2444,12 +2441,12 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		rc = 0;
 		mutex_lock(&lli->lli_och_mutex);
-		if (fd->fd_lease_och == NULL) {
+		if (!fd->fd_lease_och) {
 			fd->fd_lease_och = och;
 			och = NULL;
 		}
 		mutex_unlock(&lli->lli_och_mutex);
-		if (och != NULL) {
+		if (och) {
 			/* impossible now that only excl is supported for now */
 			ll_lease_close(och, inode, &lease_broken);
 			rc = -EBUSY;
@@ -2462,11 +2459,11 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		rc = 0;
 		mutex_lock(&lli->lli_och_mutex);
-		if (fd->fd_lease_och != NULL) {
+		if (fd->fd_lease_och) {
 			struct obd_client_handle *och = fd->fd_lease_och;
 
 			lock = ldlm_handle2lock(&och->och_lease_handle);
-			if (lock != NULL) {
+			if (lock) {
 				lock_res_and_lock(lock);
 				if (!ldlm_is_cancel(lock))
 					rc = och->och_flags &
@@ -2867,8 +2864,6 @@ static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits)
 	struct obd_export *exp;
 	int rc = 0;
 
-	LASSERT(inode != NULL);
-
 	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%pd\n",
 	       inode->i_ino, inode->i_generation, inode, dentry);
 
@@ -3027,7 +3022,7 @@ static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 				       sizeof(struct ll_fiemap_extent));
 	fiemap = libcfs_kvzalloc(num_bytes, GFP_NOFS);
 
-	if (fiemap == NULL)
+	if (!fiemap)
 		return -ENOMEM;
 
 	fiemap->fm_flags = fieinfo->fi_flags;
@@ -3181,8 +3176,7 @@ void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd)
 	unsigned int size;
 	struct llioc_data *in_data = NULL;
 
-	if (cb == NULL || cmd == NULL ||
-	    count > LLIOC_MAX_CMD || count < 0)
+	if (!cb || !cmd || count > LLIOC_MAX_CMD || count < 0)
 		return NULL;
 
 	size = sizeof(*in_data) + count * sizeof(unsigned int);
@@ -3208,7 +3202,7 @@ void ll_iocontrol_unregister(void *magic)
 {
 	struct llioc_data *tmp;
 
-	if (magic == NULL)
+	if (!magic)
 		return;
 
 	down_write(&llioc.ioc_sem);
@@ -3262,7 +3256,7 @@ int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
 	struct lu_env *env;
 	int result;
 
-	if (lli->lli_clob == NULL)
+	if (!lli->lli_clob)
 		return 0;
 
 	env = cl_env_nested_get(&nest);
@@ -3275,7 +3269,7 @@ int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf)
 	if (conf->coc_opc == OBJECT_CONF_SET) {
 		struct ldlm_lock *lock = conf->coc_lock;
 
-		LASSERT(lock != NULL);
+		LASSERT(lock);
 		LASSERT(ldlm_has_layout(lock));
 		if (result == 0) {
 			/* it can only be allowed to match after layout is
@@ -3304,7 +3298,7 @@ static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
 	       PFID(ll_inode2fid(inode)), !!(lock->l_flags & LDLM_FL_LVB_READY),
 	       lock->l_lvb_data, lock->l_lvb_len);
 
-	if ((lock->l_lvb_data != NULL) && (lock->l_flags & LDLM_FL_LVB_READY))
+	if (lock->l_lvb_data && (lock->l_flags & LDLM_FL_LVB_READY))
 		return 0;
 
 	/* if layout lock was granted right away, the layout is returned
@@ -3321,7 +3315,7 @@ static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
 		return rc;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -3333,20 +3327,20 @@ static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock)
 	}
 
 	lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize);
-	if (lmm == NULL) {
+	if (!lmm) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	lvbdata = libcfs_kvzalloc(lmmsize, GFP_NOFS);
-	if (lvbdata == NULL) {
+	if (!lvbdata) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	memcpy(lvbdata, lmm, lmmsize);
 	lock_res_and_lock(lock);
-	if (lock->l_lvb_data != NULL)
+	if (lock->l_lvb_data)
 		kvfree(lock->l_lvb_data);
 
 	lock->l_lvb_data = lvbdata;
@@ -3377,7 +3371,7 @@ static int ll_layout_lock_set(struct lustre_handle *lockh, ldlm_mode_t mode,
 	LASSERT(lustre_handle_is_used(lockh));
 
 	lock = ldlm_handle2lock(lockh);
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	LASSERT(ldlm_has_layout(lock));
 
 	LDLM_DEBUG(lock, "File %p/"DFID" being reconfigured: %d.\n",
@@ -3410,12 +3404,12 @@ static int ll_layout_lock_set(struct lustre_handle *lockh, ldlm_mode_t mode,
 	 * lvb_data is immutable if the lock is held so it's safe to access it
 	 * without res lock. See the description in ldlm_lock_decref_internal()
 	 * for the condition to free lvb_data of layout lock */
-	if (lock->l_lvb_data != NULL) {
+	if (lock->l_lvb_data) {
 		rc = obd_unpackmd(sbi->ll_dt_exp, &md.lsm,
 				  lock->l_lvb_data, lock->l_lvb_len);
 		if (rc >= 0) {
 			*gen = LL_LAYOUT_GEN_EMPTY;
-			if (md.lsm != NULL)
+			if (md.lsm)
 				*gen = md.lsm->lsm_layout_gen;
 			rc = 0;
 		} else {
@@ -3436,7 +3430,7 @@ static int ll_layout_lock_set(struct lustre_handle *lockh, ldlm_mode_t mode,
 	conf.u.coc_md = &md;
 	rc = ll_layout_conf(inode, &conf);
 
-	if (md.lsm != NULL)
+	if (md.lsm)
 		obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
 
 	/* refresh layout failed, need to wait */
@@ -3537,8 +3531,7 @@ again:
 
 	rc = md_enqueue(sbi->ll_md_exp, &einfo, &it, op_data, &lockh,
 			NULL, 0, NULL, 0);
-	if (it.d.lustre.it_data != NULL)
-		ptlrpc_req_finished(it.d.lustre.it_data);
+	ptlrpc_req_finished(it.d.lustre.it_data);
 	it.d.lustre.it_data = NULL;
 
 	ll_finish_md_op_data(op_data);
diff --git a/drivers/staging/lustre/lustre/llite/llite_close.c b/drivers/staging/lustre/lustre/llite/llite_close.c
index 3f348a3..626846e 100644
--- a/drivers/staging/lustre/lustre/llite/llite_close.c
+++ b/drivers/staging/lustre/lustre/llite/llite_close.c
@@ -52,7 +52,7 @@ void vvp_write_pending(struct ccc_object *club, struct ccc_page *page)
 
 	spin_lock(&lli->lli_lock);
 	lli->lli_flags |= LLIF_SOM_DIRTY;
-	if (page != NULL && list_empty(&page->cpg_pending_linkage))
+	if (page && list_empty(&page->cpg_pending_linkage))
 		list_add(&page->cpg_pending_linkage,
 			     &club->cob_pending_list);
 	spin_unlock(&lli->lli_lock);
@@ -65,7 +65,7 @@ void vvp_write_complete(struct ccc_object *club, struct ccc_page *page)
 	int rc = 0;
 
 	spin_lock(&lli->lli_lock);
-	if (page != NULL && !list_empty(&page->cpg_pending_linkage)) {
+	if (page && !list_empty(&page->cpg_pending_linkage)) {
 		list_del_init(&page->cpg_pending_linkage);
 		rc = 1;
 	}
@@ -144,8 +144,8 @@ void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data,
 	spin_lock(&lli->lli_lock);
 	if (!(list_empty(&club->cob_pending_list))) {
 		if (!(lli->lli_flags & LLIF_EPOCH_PENDING)) {
-			LASSERT(*och != NULL);
-			LASSERT(lli->lli_pending_och == NULL);
+			LASSERT(*och);
+			LASSERT(!lli->lli_pending_och);
 			/* Inode is dirty and there is no pending write done
 			 * request yet, DONE_WRITE is to be sent later. */
 			lli->lli_flags |= LLIF_EPOCH_PENDING;
@@ -215,7 +215,7 @@ int ll_som_update(struct inode *inode, struct md_op_data *op_data)
 	struct obdo *oa;
 	int rc;
 
-	LASSERT(op_data != NULL);
+	LASSERT(op_data);
 	if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
 		CERROR("ino %lu/%u(flags %u) som valid it just after recovery\n",
 		       inode->i_ino, inode->i_generation,
@@ -266,7 +266,7 @@ static void ll_prepare_done_writing(struct inode *inode,
 {
 	ll_ioepoch_close(inode, op_data, och, LLIF_DONE_WRITING);
 	/* If there is no @och, we do not do D_W yet. */
-	if (*och == NULL)
+	if (!*och)
 		return;
 
 	ll_pack_inode2opdata(inode, op_data, &(*och)->och_fh);
@@ -289,7 +289,7 @@ static void ll_done_writing(struct inode *inode)
 
 	ll_prepare_done_writing(inode, op_data, &och);
 	/* If there is no @och, we do not do D_W yet. */
-	if (och == NULL)
+	if (!och)
 		goto out;
 
 	rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, NULL);
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
index 29c325d..7dbe86a 100644
--- a/drivers/staging/lustre/lustre/llite/llite_internal.h
+++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
@@ -913,7 +913,7 @@ static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env)
 	struct vvp_thread_info      *info;
 
 	info = lu_context_key_get(&env->le_ctx, &vvp_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -937,7 +937,7 @@ static inline struct vvp_session *vvp_env_session(const struct lu_env *env)
 	struct vvp_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &vvp_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
@@ -968,7 +968,7 @@ static inline void ll_invalidate_page(struct page *vmpage)
 	loff_t offset = vmpage->index << PAGE_CACHE_SHIFT;
 
 	LASSERT(PageLocked(vmpage));
-	if (mapping == NULL)
+	if (!mapping)
 		return;
 
 	ll_teardown_mmaps(mapping, offset, offset + PAGE_CACHE_SIZE);
@@ -993,7 +993,7 @@ static inline struct client_obd *sbi2mdc(struct ll_sb_info *sbi)
 {
 	struct obd_device *obd = sbi->ll_md_exp->exp_obd;
 
-	if (obd == NULL)
+	if (!obd)
 		LBUG();
 	return &obd->u.cli;
 }
@@ -1018,7 +1018,7 @@ static inline struct lu_fid *ll_inode2fid(struct inode *inode)
 {
 	struct lu_fid *fid;
 
-	LASSERT(inode != NULL);
+	LASSERT(inode);
 	fid = &ll_i2info(inode)->lli_fid;
 
 	return fid;
@@ -1171,8 +1171,8 @@ ll_statahead_mark(struct inode *dir, struct dentry *dentry)
 	if (lli->lli_opendir_pid != current_pid())
 		return;
 
-	LASSERT(ldd != NULL);
-	if (sai != NULL)
+	LASSERT(ldd);
+	if (sai)
 		ldd->lld_sa_generation = sai->sai_generation;
 }
 
@@ -1191,7 +1191,7 @@ d_need_statahead(struct inode *dir, struct dentry *dentryp)
 		return -EAGAIN;
 
 	/* statahead has been stopped */
-	if (lli->lli_opendir_key == NULL)
+	if (!lli->lli_opendir_key)
 		return -EAGAIN;
 
 	ldd = ll_d2d(dentryp);
@@ -1345,7 +1345,6 @@ static inline int ll_file_nolock(const struct file *file)
 	struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 	struct inode *inode = file_inode(file);
 
-	LASSERT(fd != NULL);
 	return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) ||
 		(ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK));
 }
@@ -1383,7 +1382,7 @@ static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode,
 		it->d.lustre.it_lock_set = 1;
 	}
 
-	if (bits != NULL)
+	if (bits)
 		*bits = it->d.lustre.it_lock_bits;
 }
 
@@ -1401,14 +1400,14 @@ static inline int d_lustre_invalid(const struct dentry *dentry)
 {
 	struct ll_dentry_data *lld = ll_d2d(dentry);
 
-	return (lld == NULL) || lld->lld_invalid;
+	return !lld || lld->lld_invalid;
 }
 
 static inline void __d_lustre_invalidate(struct dentry *dentry)
 {
 	struct ll_dentry_data *lld = ll_d2d(dentry);
 
-	if (lld != NULL)
+	if (lld)
 		lld->lld_invalid = 1;
 }
 
@@ -1442,7 +1441,7 @@ static inline void d_lustre_invalidate(struct dentry *dentry, int nested)
 static inline void d_lustre_revalidate(struct dentry *dentry)
 {
 	spin_lock(&dentry->d_lock);
-	LASSERT(ll_d2d(dentry) != NULL);
+	LASSERT(ll_d2d(dentry));
 	ll_d2d(dentry)->lld_invalid = 0;
 	spin_unlock(&dentry->d_lock);
 }
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 446e4b8..4de085d 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -171,7 +171,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 		return -ENOMEM;
 	}
 
-	if (llite_root != NULL) {
+	if (llite_root) {
 		err = ldebugfs_register_mountpoint(llite_root, sb, dt, md);
 		if (err < 0)
 			CERROR("could not register mount in <debugfs>/lustre/llite\n");
@@ -493,7 +493,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 	md_free_lustre_md(sbi->ll_md_exp, &lmd);
 	ptlrpc_req_finished(request);
 
-	if (root == NULL || IS_ERR(root)) {
+	if (IS_ERR_OR_NULL(root)) {
 		if (lmd.lsm)
 			obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 #ifdef CONFIG_FS_POSIX_ACL
@@ -532,7 +532,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 				 &sbi->ll_cache, NULL);
 
 	sb->s_root = d_make_root(root);
-	if (sb->s_root == NULL) {
+	if (!sb->s_root) {
 		CERROR("%s: can't make root dentry\n",
 			ll_get_fsname(sb, NULL, 0));
 		err = -ENOMEM;
@@ -547,7 +547,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 	/* s_dev is also used in lt_compare() to compare two fs, but that is
 	 * only a node-local comparison. */
 	uuid = obd_get_uuid(sbi->ll_md_exp);
-	if (uuid != NULL) {
+	if (uuid) {
 		sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 		get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 	}
@@ -777,7 +777,7 @@ static int ll_options(char *options, int *flags)
 next:
 		/* Find next opt */
 		s2 = strchr(s1, ',');
-		if (s2 == NULL)
+		if (!s2)
 			break;
 		s1 = s2 + 1;
 	}
@@ -904,7 +904,7 @@ int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 
 	/* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 	lprof = class_get_profile(profilenm);
-	if (lprof == NULL) {
+	if (!lprof) {
 		LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be read from the MGS.  Does that filesystem exist?\n",
 				   profilenm);
 		err = -EINVAL;
@@ -1036,8 +1036,8 @@ void ll_clear_inode(struct inode *inode)
 
 	if (S_ISDIR(inode->i_mode)) {
 		/* these should have been cleared in ll_file_release */
-		LASSERT(lli->lli_opendir_key == NULL);
-		LASSERT(lli->lli_sai == NULL);
+		LASSERT(!lli->lli_opendir_key);
+		LASSERT(!lli->lli_sai);
 		LASSERT(lli->lli_opendir_pid == 0);
 	}
 
@@ -1065,7 +1065,7 @@ void ll_clear_inode(struct inode *inode)
 	ll_xattr_cache_destroy(inode);
 
 	if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
-		LASSERT(lli->lli_posix_acl == NULL);
+		LASSERT(!lli->lli_posix_acl);
 		if (lli->lli_remote_perms) {
 			free_rmtperm_hash(lli->lli_remote_perms);
 			lli->lli_remote_perms = NULL;
@@ -1074,7 +1074,7 @@ void ll_clear_inode(struct inode *inode)
 #ifdef CONFIG_FS_POSIX_ACL
 	else if (lli->lli_posix_acl) {
 		LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
-		LASSERT(lli->lli_remote_perms == NULL);
+		LASSERT(!lli->lli_remote_perms);
 		posix_acl_release(lli->lli_posix_acl);
 		lli->lli_posix_acl = NULL;
 	}
@@ -1161,7 +1161,6 @@ static int ll_setattr_done_writing(struct inode *inode,
 	struct ll_inode_info *lli = ll_i2info(inode);
 	int rc = 0;
 
-	LASSERT(op_data != NULL);
 	if (!S_ISREG(inode->i_mode))
 		return 0;
 
@@ -1514,7 +1513,7 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
 	struct ll_sb_info *sbi = ll_i2sbi(inode);
 
 	LASSERT((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
-	if (lsm != NULL) {
+	if (lsm) {
 		if (!lli->lli_has_smd &&
 		    !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
 			cl_file_inode_init(inode, md);
@@ -1689,7 +1688,7 @@ void ll_delete_inode(struct inode *inode)
 {
 	struct cl_inode_info *lli = cl_i2info(inode);
 
-	if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
+	if (S_ISREG(inode->i_mode) && lli->lli_clob)
 		/* discard all dirty pages before truncating them, required by
 		 * osc_extent implementation at LU-1030. */
 		cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
@@ -1831,7 +1830,7 @@ void ll_umount_begin(struct super_block *sb)
 	       sb->s_count, atomic_read(&sb->s_active));
 
 	obd = class_exp2obd(sbi->ll_md_exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CERROR("Invalid MDC connection handle %#llx\n",
 		       sbi->ll_md_exp->exp_handle.h_cookie);
 		return;
@@ -1839,7 +1838,7 @@ void ll_umount_begin(struct super_block *sb)
 	obd->obd_force = 1;
 
 	obd = class_exp2obd(sbi->ll_dt_exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CERROR("Invalid LOV connection handle %#llx\n",
 		       sbi->ll_dt_exp->exp_handle.h_cookie);
 		return;
@@ -1954,7 +1953,7 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 	if (*inode) {
 		ll_update_inode(*inode, &md);
 	} else {
-		LASSERT(sb != NULL);
+		LASSERT(sb);
 
 		/*
 		 * At this point server returns to client's same fid as client
@@ -1965,7 +1964,7 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 		*inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
 					     sbi->ll_flags & LL_SBI_32BIT_API),
 				 &md);
-		if (*inode == NULL || IS_ERR(*inode)) {
+		if (IS_ERR_OR_NULL(*inode)) {
 #ifdef CONFIG_FS_POSIX_ACL
 			if (md.posix_acl) {
 				posix_acl_release(md.posix_acl);
@@ -1987,13 +1986,13 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 	 * 2. layout was changed by another client
 	 * 3. proc2: refresh layout and layout lock granted
 	 * 4. proc1: to apply a stale layout */
-	if (it != NULL && it->d.lustre.it_lock_mode != 0) {
+	if (it && it->d.lustre.it_lock_mode != 0) {
 		struct lustre_handle lockh;
 		struct ldlm_lock *lock;
 
 		lockh.cookie = it->d.lustre.it_lock_handle;
 		lock = ldlm_handle2lock(&lockh);
-		LASSERT(lock != NULL);
+		LASSERT(lock);
 		if (ldlm_has_layout(lock)) {
 			struct cl_object_conf conf;
 
@@ -2008,7 +2007,7 @@ int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
 	}
 
 out:
-	if (md.lsm != NULL)
+	if (md.lsm)
 		obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
 	md_free_lustre_md(sbi->ll_md_exp, &md);
 
@@ -2113,15 +2112,13 @@ struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
 				       const char *name, int namelen,
 				       int mode, __u32 opc, void *data)
 {
-	LASSERT(i1 != NULL);
-
 	if (namelen > ll_i2sbi(i1)->ll_namelen)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	if (op_data == NULL)
+	if (!op_data)
 		op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 
-	if (op_data == NULL)
+	if (!op_data)
 		return ERR_PTR(-ENOMEM);
 
 	ll_i2gids(op_data->op_suppgids, i1, i2);
@@ -2141,8 +2138,8 @@ struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
 	op_data->op_cap = cfs_curproc_cap_pack();
 	op_data->op_bias = 0;
 	op_data->op_cli_flags = 0;
-	if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
-	     filename_is_volatile(name, namelen, NULL))
+	if ((opc == LUSTRE_OPC_CREATE) && name &&
+	    filename_is_volatile(name, namelen, NULL))
 		op_data->op_bias |= MDS_CREATE_VOLATILE;
 	op_data->op_opc = opc;
 	op_data->op_mds = 0;
@@ -2177,7 +2174,7 @@ int ll_show_options(struct seq_file *seq, struct dentry *dentry)
 {
 	struct ll_sb_info *sbi;
 
-	LASSERT((seq != NULL) && (dentry != NULL));
+	LASSERT(seq && dentry);
 	sbi = ll_s2sbi(dentry->d_sb);
 
 	if (sbi->ll_flags & LL_SBI_NOLCK)
@@ -2238,7 +2235,7 @@ char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
 	char *ptr;
 	int len;
 
-	if (buf == NULL) {
+	if (!buf) {
 		/* this means the caller wants to use static buffer
 		 * and it doesn't care about race. Usually this is
 		 * in error reporting path */
@@ -2267,9 +2264,9 @@ void ll_dirty_page_discard_warn(struct page *page, int ioret)
 
 	/* this can be called inside spin lock so use GFP_ATOMIC. */
 	buf = (char *)__get_free_page(GFP_ATOMIC);
-	if (buf != NULL) {
+	if (buf) {
 		dentry = d_find_alias(page->mapping->host);
-		if (dentry != NULL)
+		if (dentry)
 			path = dentry_path_raw(dentry, buf, PAGE_SIZE);
 	}
 
@@ -2280,9 +2277,9 @@ void ll_dirty_page_discard_warn(struct page *page, int ioret)
 	       PFID(&obj->cob_header.coh_lu.loh_fid),
 	       (path && !IS_ERR(path)) ? path : "", ioret);
 
-	if (dentry != NULL)
+	if (dentry)
 		dput(dentry);
 
-	if (buf != NULL)
+	if (buf)
 		free_page((unsigned long)buf);
 }
diff --git a/drivers/staging/lustre/lustre/llite/llite_mmap.c b/drivers/staging/lustre/lustre/llite/llite_mmap.c
index bbae95c..a0a58fd 100644
--- a/drivers/staging/lustre/lustre/llite/llite_mmap.c
+++ b/drivers/staging/lustre/lustre/llite/llite_mmap.c
@@ -72,7 +72,7 @@ struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr,
 	LASSERT(!down_write_trylock(&mm->mmap_sem));
 
 	for (vma = find_vma(mm, addr);
-	    vma != NULL && vma->vm_start < (addr + count); vma = vma->vm_next) {
+	    vma && vma->vm_start < (addr + count); vma = vma->vm_next) {
 		if (vma->vm_ops && vma->vm_ops == &ll_file_vm_ops &&
 		    vma->vm_flags & VM_SHARED) {
 			ret = vma;
@@ -125,7 +125,7 @@ ll_fault_io_init(struct vm_area_struct *vma, struct lu_env **env_ret,
 
 	io = ccc_env_thread_io(env);
 	io->ci_obj = ll_i2info(inode)->lli_clob;
-	LASSERT(io->ci_obj != NULL);
+	LASSERT(io->ci_obj);
 
 	fio = &io->u.ci_fault;
 	fio->ft_index      = index;
@@ -136,7 +136,7 @@ ll_fault_io_init(struct vm_area_struct *vma, struct lu_env **env_ret,
 	 * the kernel will not read other pages not covered by ldlm in
 	 * filemap_nopage. we do our readahead in ll_readpage.
 	 */
-	if (ra_flags != NULL)
+	if (ra_flags)
 		*ra_flags = vma->vm_flags & (VM_RAND_READ|VM_SEQ_READ);
 	vma->vm_flags &= ~VM_SEQ_READ;
 	vma->vm_flags |= VM_RAND_READ;
@@ -178,8 +178,6 @@ static int ll_page_mkwrite0(struct vm_area_struct *vma, struct page *vmpage,
 	struct inode	     *inode;
 	struct ll_inode_info     *lli;
 
-	LASSERT(vmpage != NULL);
-
 	io = ll_fault_io_init(vma, &env,  &nest, vmpage->index, NULL);
 	if (IS_ERR(io)) {
 		result = PTR_ERR(io);
@@ -217,7 +215,7 @@ static int ll_page_mkwrite0(struct vm_area_struct *vma, struct page *vmpage,
 		struct ll_inode_info *lli = ll_i2info(inode);
 
 		lock_page(vmpage);
-		if (vmpage->mapping == NULL) {
+		if (!vmpage->mapping) {
 			unlock_page(vmpage);
 
 			/* page was truncated and lock was cancelled, return
@@ -320,7 +318,7 @@ static int ll_fault0(struct vm_area_struct *vma, struct vm_fault *vmf)
 			fault_ret = vio->u.fault.fault.ft_flags;
 
 		vmpage = vio->u.fault.ft_vmpage;
-		if (result != 0 && vmpage != NULL) {
+		if (result != 0 && vmpage) {
 			page_cache_release(vmpage);
 			vmf->page = NULL;
 		}
@@ -357,7 +355,7 @@ restart:
 
 		/* check if this page has been truncated */
 		lock_page(vmpage);
-		if (unlikely(vmpage->mapping == NULL)) { /* unlucky */
+		if (unlikely(!vmpage->mapping)) { /* unlucky */
 			unlock_page(vmpage);
 			page_cache_release(vmpage);
 			vmf->page = NULL;
diff --git a/drivers/staging/lustre/lustre/llite/llite_rmtacl.c b/drivers/staging/lustre/lustre/llite/llite_rmtacl.c
index b27c3f2..63e4847 100644
--- a/drivers/staging/lustre/lustre/llite/llite_rmtacl.c
+++ b/drivers/staging/lustre/lustre/llite/llite_rmtacl.c
@@ -125,12 +125,12 @@ int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops)
 	struct rmtacl_ctl_entry *rce, *e;
 
 	rce = rce_alloc(key, ops);
-	if (rce == NULL)
+	if (!rce)
 		return -ENOMEM;
 
 	spin_lock(&rct->rct_lock);
 	e = __rct_search(rct, key);
-	if (unlikely(e != NULL)) {
+	if (unlikely(e)) {
 		CWARN("Unexpected stale rmtacl_entry found: [key: %d] [ops: %d]\n",
 		      (int)key, ops);
 		rce_free(e);
@@ -213,7 +213,7 @@ static struct eacl_entry *__et_search_del(struct eacl_table *et, pid_t key,
 	struct eacl_entry *ee;
 	struct list_head *head = &et->et_entries[ee_hashfunc(key)];
 
-	LASSERT(fid != NULL);
+	LASSERT(fid);
 	list_for_each_entry(ee, head, ee_list)
 		if (ee->ee_key == key) {
 			if (lu_fid_eq(&ee->ee_fid, fid) &&
@@ -256,12 +256,12 @@ int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type,
 	struct eacl_entry *ee, *e;
 
 	ee = ee_alloc(key, fid, type, header);
-	if (ee == NULL)
+	if (!ee)
 		return -ENOMEM;
 
 	spin_lock(&et->et_lock);
 	e = __et_search_del(et, key, fid, type);
-	if (unlikely(e != NULL)) {
+	if (unlikely(e)) {
 		CWARN("Unexpected stale eacl_entry found: [key: %d] [fid: " DFID "] [type: %d]\n",
 		      (int)key, PFID(fid), type);
 		ee_free(e);
diff --git a/drivers/staging/lustre/lustre/llite/lloop.c b/drivers/staging/lustre/lustre/llite/lloop.c
index 69c41af..20fecaf 100644
--- a/drivers/staging/lustre/lustre/llite/lloop.c
+++ b/drivers/staging/lustre/lustre/llite/lloop.c
@@ -211,9 +211,8 @@ static int do_bio_lustrebacked(struct lloop_device *lo, struct bio *head)
 		return io->ci_result;
 	io->ci_lockreq = CILR_NEVER;
 
-	LASSERT(head != NULL);
 	rw = head->bi_rw;
-	for (bio = head; bio != NULL; bio = bio->bi_next) {
+	for (bio = head; bio ; bio = bio->bi_next) {
 		LASSERT(rw == bio->bi_rw);
 
 		offset = (pgoff_t)(bio->bi_iter.bi_sector << 9) + lo->lo_offset;
@@ -297,7 +296,7 @@ static unsigned int loop_get_bio(struct lloop_device *lo, struct bio **req)
 
 	spin_lock_irq(&lo->lo_lock);
 	first = lo->lo_bio;
-	if (unlikely(first == NULL)) {
+	if (unlikely(!first)) {
 		spin_unlock_irq(&lo->lo_lock);
 		return 0;
 	}
@@ -458,7 +457,7 @@ static int loop_thread(void *data)
 			       total_count, times, total_count / times);
 		}
 
-		LASSERT(bio != NULL);
+		LASSERT(bio);
 		LASSERT(count <= atomic_read(&lo->lo_pending));
 		loop_handle_bio(lo, bio);
 		atomic_sub(count, &lo->lo_pending);
@@ -560,7 +559,7 @@ static int loop_clr_fd(struct lloop_device *lo, struct block_device *bdev,
 	if (lo->lo_refcnt > count)	/* we needed one fd for the ioctl */
 		return -EBUSY;
 
-	if (filp == NULL)
+	if (!filp)
 		return -EINVAL;
 
 	spin_lock_irq(&lo->lo_lock);
@@ -625,11 +624,11 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
 	case LL_IOC_LLOOP_INFO: {
 		struct lu_fid fid;
 
-		if (lo->lo_backing_file == NULL) {
+		if (!lo->lo_backing_file) {
 			err = -ENOENT;
 			break;
 		}
-		if (inode == NULL)
+		if (!inode)
 			inode = file_inode(lo->lo_backing_file);
 		if (lo->lo_state == LLOOP_BOUND)
 			fid = ll_i2info(inode)->lli_fid;
@@ -676,7 +675,7 @@ static enum llioc_iter lloop_ioctl(struct inode *unused, struct file *file,
 	if (magic != ll_iocontrol_magic)
 		return LLIOC_CONT;
 
-	if (disks == NULL) {
+	if (!disks) {
 		err = -ENODEV;
 		goto out1;
 	}
@@ -793,7 +792,7 @@ static int __init lloop_init(void)
 	       lloop_major, max_loop);
 
 	ll_iocontrol_magic = ll_iocontrol_register(lloop_ioctl, 2, cmdlist);
-	if (ll_iocontrol_magic == NULL)
+	if (!ll_iocontrol_magic)
 		goto out_mem1;
 
 	loop_dev = kcalloc(max_loop, sizeof(*loop_dev), GFP_KERNEL);
diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c
index 8d3c788..4d2e4b2 100644
--- a/drivers/staging/lustre/lustre/llite/lproc_llite.c
+++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c
@@ -453,7 +453,7 @@ static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 		if (diff <= 0)
 			break;
 
-		if (sbi->ll_dt_exp == NULL) { /* being initialized */
+		if (!sbi->ll_dt_exp) { /* being initialized */
 			rc = -ENODEV;
 			break;
 		}
@@ -966,9 +966,9 @@ int ldebugfs_register_mountpoint(struct dentry *parent,
 
 	name[MAX_STRING_SIZE] = '\0';
 
-	LASSERT(sbi != NULL);
-	LASSERT(mdc != NULL);
-	LASSERT(osc != NULL);
+	LASSERT(sbi);
+	LASSERT(mdc);
+	LASSERT(osc);
 
 	/* Get fsname */
 	len = strlen(lsi->lsi_lmd->lmd_profile);
@@ -1012,7 +1012,7 @@ int ldebugfs_register_mountpoint(struct dentry *parent,
 	/* File operations stats */
 	sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 					    LPROCFS_STATS_FLAG_NONE);
-	if (sbi->ll_stats == NULL) {
+	if (!sbi->ll_stats) {
 		err = -ENOMEM;
 		goto out;
 	}
@@ -1039,7 +1039,7 @@ int ldebugfs_register_mountpoint(struct dentry *parent,
 
 	sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 					       LPROCFS_STATS_FLAG_NONE);
-	if (sbi->ll_ra_stats == NULL) {
+	if (!sbi->ll_ra_stats) {
 		err = -ENOMEM;
 		goto out;
 	}
diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
index da5f443..dc16d43 100644
--- a/drivers/staging/lustre/lustre/llite/namei.c
+++ b/drivers/staging/lustre/lustre/llite/namei.c
@@ -118,7 +118,7 @@ struct inode *ll_iget(struct super_block *sb, ino_t hash,
 
 			ll_read_inode2(inode, md);
 			if (S_ISREG(inode->i_mode) &&
-			    ll_i2info(inode)->lli_clob == NULL) {
+			    !ll_i2info(inode)->lli_clob) {
 				CDEBUG(D_INODE,
 					"%s: apply lsm %p to inode "DFID".\n",
 					ll_get_fsname(sb, NULL, 0), md->lsm,
@@ -181,9 +181,9 @@ int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 
 		/* Inode is set to lock->l_resource->lr_lvb_inode
 		 * for mdc - bug 24555 */
-		LASSERT(lock->l_ast_data == NULL);
+		LASSERT(!lock->l_ast_data);
 
-		if (inode == NULL)
+		if (!inode)
 			break;
 
 		/* Invalidate all dentries associated with this inode */
@@ -260,7 +260,7 @@ int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 		}
 
 		if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
-		    inode->i_sb->s_root != NULL &&
+		    inode->i_sb->s_root &&
 		    !is_root_inode(inode))
 			ll_invalidate_aliases(inode);
 
@@ -288,12 +288,7 @@ __u32 ll_i2suppgid(struct inode *i)
  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 {
-#if 0
-	int i;
-#endif
-
-	LASSERT(i1 != NULL);
-	LASSERT(suppgids != NULL);
+	LASSERT(i1);
 
 	suppgids[0] = ll_i2suppgid(i1);
 
@@ -301,22 +296,6 @@ void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
 		suppgids[1] = ll_i2suppgid(i2);
 		else
 			suppgids[1] = -1;
-
-#if 0
-	for (i = 0; i < current_ngroups; i++) {
-		if (suppgids[0] == -1) {
-			if (current_groups[i] != suppgids[1])
-				suppgids[0] = current_groups[i];
-			continue;
-		}
-		if (suppgids[1] == -1) {
-			if (current_groups[i] != suppgids[0])
-				suppgids[1] = current_groups[i];
-			continue;
-		}
-		break;
-	}
-#endif
 }
 
 /*
@@ -445,7 +424,7 @@ static int ll_lookup_it_finish(struct ptlrpc_request *request,
 		   !it_disposition(it, DISP_OPEN_CREATE)) {
 		/* With DISP_OPEN_CREATE dentry will
 		   instantiated in ll_create_it. */
-		LASSERT(d_inode(*de) == NULL);
+		LASSERT(!d_inode(*de));
 		d_instantiate(*de, inode);
 	}
 
@@ -498,7 +477,7 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
 	if (d_mountpoint(dentry))
 		CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
 
-	if (it == NULL || it->it_op == IT_GETXATTR)
+	if (!it || it->it_op == IT_GETXATTR)
 		it = &lookup_it;
 
 	if (it->it_op == IT_GETATTR) {
@@ -557,7 +536,7 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
  out:
 	if (req)
 		ptlrpc_req_finished(req);
-	if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
+	if (it->it_op == IT_GETATTR && (!retval || retval == dentry))
 		ll_statahead_mark(parent, dentry);
 	return retval;
 }
@@ -582,7 +561,7 @@ static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
 		itp = &it;
 	de = ll_lookup_it(parent, dentry, itp, 0);
 
-	if (itp != NULL)
+	if (itp)
 		ll_intent_release(itp);
 
 	return de;
@@ -622,7 +601,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 	de = ll_lookup_it(dir, dentry, it, lookup_flags);
 	if (IS_ERR(de))
 		rc = PTR_ERR(de);
-	else if (de != NULL)
+	else if (de)
 		dentry = de;
 
 	if (!rc) {
@@ -631,7 +610,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 			rc = ll_create_it(dir, dentry, mode, it);
 			if (rc) {
 				/* We dget in ll_splice_alias. */
-				if (de != NULL)
+				if (de)
 					dput(de);
 				goto out_release;
 			}
@@ -655,7 +634,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
 				/* We dget in ll_splice_alias. finish_open takes
 				 * care of dget for fd open.
 				 */
-				if (de != NULL)
+				if (de)
 					dput(de);
 			}
 		} else {
@@ -767,7 +746,7 @@ static int ll_new_node(struct inode *dir, struct dentry *dentry,
 	int tgt_len = 0;
 	int err;
 
-	if (unlikely(tgt != NULL))
+	if (unlikely(tgt))
 		tgt_len = strlen(tgt) + 1;
 
 	op_data = ll_prep_md_op_data(NULL, dir, NULL,
@@ -891,7 +870,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 	 * check it is complete and sensible. */
 	eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
 					      body->eadatasize);
-	LASSERT(eadata != NULL);
+	LASSERT(eadata);
 
 	rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
 	if (rc < 0) {
@@ -901,7 +880,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 	LASSERT(rc >= sizeof(*lsm));
 
 	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (oa == NULL) {
+	if (!oa) {
 		rc = -ENOMEM;
 		goto out_free_memmd;
 	}
@@ -917,7 +896,7 @@ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
 						     &RMF_LOGCOOKIES,
 						   sizeof(struct llog_cookie) *
 						     lsm->lsm_stripe_count);
-		if (oti.oti_logcookies == NULL) {
+		if (!oti.oti_logcookies) {
 			oa->o_valid &= ~OBD_MD_FLCOOKIE;
 			body->valid &= ~OBD_MD_FLCOOKIE;
 		}
diff --git a/drivers/staging/lustre/lustre/llite/rw.c b/drivers/staging/lustre/lustre/llite/rw.c
index 6b587d6..da71937 100644
--- a/drivers/staging/lustre/lustre/llite/rw.c
+++ b/drivers/staging/lustre/lustre/llite/rw.c
@@ -70,9 +70,9 @@ static void ll_cl_fini(struct ll_cl_context *lcc)
 	struct cl_page *page = lcc->lcc_page;
 
 	LASSERT(lcc->lcc_cookie == current);
-	LASSERT(env != NULL);
+	LASSERT(env);
 
-	if (page != NULL) {
+	if (page) {
 		lu_ref_del(&page->cp_reference, "cl_io", io);
 		cl_page_put(env, page);
 	}
@@ -97,7 +97,7 @@ static struct ll_cl_context *ll_cl_init(struct file *file,
 	int result = 0;
 
 	clob = ll_i2info(vmpage->mapping->host)->lli_clob;
-	LASSERT(clob != NULL);
+	LASSERT(clob);
 
 	env = cl_env_get(&refcheck);
 	if (IS_ERR(env))
@@ -111,7 +111,7 @@ static struct ll_cl_context *ll_cl_init(struct file *file,
 
 	cio = ccc_env_io(env);
 	io = cio->cui_cl.cis_io;
-	if (io == NULL && create) {
+	if (!io && create) {
 		struct inode *inode = vmpage->mapping->host;
 		loff_t pos;
 
@@ -163,12 +163,11 @@ static struct ll_cl_context *ll_cl_init(struct file *file,
 	}
 
 	lcc->lcc_io = io;
-	if (io == NULL)
+	if (!io)
 		result = -EIO;
 	if (result == 0) {
 		struct cl_page   *page;
 
-		LASSERT(io != NULL);
 		LASSERT(io->ci_state == CIS_IO_GOING);
 		LASSERT(cio->cui_fd == LUSTRE_FPRIVATE(file));
 		page = cl_page_find(env, clob, vmpage->index, vmpage,
@@ -473,7 +472,7 @@ static int ll_read_ahead_page(const struct lu_env *env, struct cl_io *io,
 	const char       *msg   = NULL;
 
 	vmpage = grab_cache_page_nowait(mapping, index);
-	if (vmpage != NULL) {
+	if (vmpage) {
 		/* Check if vmpage was truncated or reclaimed */
 		if (vmpage->mapping == mapping) {
 			page = cl_page_find(env, clob, vmpage->index,
@@ -500,7 +499,7 @@ static int ll_read_ahead_page(const struct lu_env *env, struct cl_io *io,
 		which = RA_STAT_FAILED_GRAB_PAGE;
 		msg   = "g_c_p_n failed";
 	}
-	if (msg != NULL) {
+	if (msg) {
 		ll_ra_stats_inc(mapping, which);
 		CDEBUG(D_READA, "%s\n", msg);
 	}
@@ -616,7 +615,7 @@ static int ll_read_ahead_pages(const struct lu_env *env,
 	int rc, count = 0, stride_ria;
 	unsigned long page_idx;
 
-	LASSERT(ria != NULL);
+	LASSERT(ria);
 	RIA_DEBUG(ria);
 
 	stride_ria = ria->ria_length > ria->ria_pages && ria->ria_pages > 0;
@@ -699,7 +698,7 @@ int ll_readahead(const struct lu_env *env, struct cl_io *io,
 		bead = NULL;
 
 	/* Enlarge the RA window to encompass the full read */
-	if (bead != NULL && ras->ras_window_start + ras->ras_window_len <
+	if (bead && ras->ras_window_start + ras->ras_window_len <
 	    bead->lrr_start + bead->lrr_count) {
 		ras->ras_window_len = bead->lrr_start + bead->lrr_count -
 				      ras->ras_window_start;
@@ -1100,7 +1099,7 @@ int ll_writepage(struct page *vmpage, struct writeback_control *wbc)
 	LASSERT(PageLocked(vmpage));
 	LASSERT(!PageWriteback(vmpage));
 
-	LASSERT(ll_i2dtexp(inode) != NULL);
+	LASSERT(ll_i2dtexp(inode));
 
 	env = cl_env_nested_get(&nest);
 	if (IS_ERR(env)) {
@@ -1109,7 +1108,7 @@ int ll_writepage(struct page *vmpage, struct writeback_control *wbc)
 	}
 
 	clob  = ll_i2info(inode)->lli_clob;
-	LASSERT(clob != NULL);
+	LASSERT(clob);
 
 	io = ccc_env_thread_io(env);
 	io->ci_obj = clob;
diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 711fda9..6167c9d 100644
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -92,9 +92,9 @@ static void ll_invalidatepage(struct page *vmpage, unsigned int offset,
 		if (!IS_ERR(env)) {
 			inode = vmpage->mapping->host;
 			obj = ll_i2info(inode)->lli_clob;
-			if (obj != NULL) {
+			if (obj) {
 				page = cl_vmpage_page(vmpage, obj);
-				if (page != NULL) {
+				if (page) {
 					lu_ref_add(&page->cp_reference,
 						   "delete", vmpage);
 					cl_page_delete(env, page);
@@ -128,11 +128,11 @@ static int ll_releasepage(struct page *vmpage, RELEASEPAGE_ARG_TYPE gfp_mask)
 		return 0;
 
 	mapping = vmpage->mapping;
-	if (mapping == NULL)
+	if (!mapping)
 		return 1;
 
 	obj = ll_i2info(mapping->host)->lli_clob;
-	if (obj == NULL)
+	if (!obj)
 		return 1;
 
 	/* 1 for page allocator, 1 for cl_page and 1 for page cache */
@@ -149,8 +149,8 @@ static int ll_releasepage(struct page *vmpage, RELEASEPAGE_ARG_TYPE gfp_mask)
 		return 0;
 
 	page = cl_vmpage_page(vmpage, obj);
-	result = page == NULL;
-	if (page != NULL) {
+	result = !page;
+	if (page) {
 		if (!cl_page_in_use(page)) {
 			result = 1;
 			cl_page_delete(env, page);
@@ -396,7 +396,7 @@ static ssize_t ll_direct_IO_26(struct kiocb *iocb, struct iov_iter *iter,
 	env = cl_env_get(&refcheck);
 	LASSERT(!IS_ERR(env));
 	io = ccc_env_io(env)->cui_cl.cis_io;
-	LASSERT(io != NULL);
+	LASSERT(io);
 
 	/* 0. Need locking between buffered and direct access. and race with
 	 *    size changing by concurrent truncates and writes.
@@ -461,7 +461,7 @@ out:
 			struct lov_stripe_md *lsm;
 
 			lsm = ccc_inode_lsm_get(inode);
-			LASSERT(lsm != NULL);
+			LASSERT(lsm);
 			lov_stripe_lock(lsm);
 			obd_adjust_kms(ll_i2dtexp(inode), lsm, file_offset, 0);
 			lov_stripe_unlock(lsm);
diff --git a/drivers/staging/lustre/lustre/llite/statahead.c b/drivers/staging/lustre/lustre/llite/statahead.c
index 88ffd8e..bd6a6b7 100644
--- a/drivers/staging/lustre/lustre/llite/statahead.c
+++ b/drivers/staging/lustre/lustre/llite/statahead.c
@@ -130,7 +130,7 @@ ll_sa_entry_unhash(struct ll_statahead_info *sai, struct ll_sa_entry *entry)
 static inline int agl_should_run(struct ll_statahead_info *sai,
 				 struct inode *inode)
 {
-	return (inode != NULL && S_ISREG(inode->i_mode) && sai->sai_agl_valid);
+	return (inode && S_ISREG(inode->i_mode) && sai->sai_agl_valid);
 }
 
 static inline int sa_sent_full(struct ll_statahead_info *sai)
@@ -499,7 +499,7 @@ static void ll_sai_put(struct ll_statahead_info *sai)
 			return;
 		}
 
-		LASSERT(lli->lli_opendir_key == NULL);
+		LASSERT(!lli->lli_opendir_key);
 		LASSERT(thread_is_stopped(&sai->sai_thread));
 		LASSERT(thread_is_stopped(&sai->sai_agl_thread));
 
@@ -618,13 +618,13 @@ static void ll_post_statahead(struct ll_statahead_info *sai)
 	it = &minfo->mi_it;
 	req = entry->se_req;
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	child = entry->se_inode;
-	if (child == NULL) {
+	if (!child) {
 		/*
 		 * lookup.
 		 */
@@ -705,7 +705,7 @@ static int ll_statahead_interpret(struct ptlrpc_request *req,
 
 	spin_lock(&lli->lli_sa_lock);
 	/* stale entry */
-	if (unlikely(lli->lli_sai == NULL ||
+	if (unlikely(!lli->lli_sai ||
 		     lli->lli_sai->sai_generation != minfo->mi_generation)) {
 		spin_unlock(&lli->lli_sa_lock);
 		rc = -ESTALE;
@@ -720,7 +720,7 @@ static int ll_statahead_interpret(struct ptlrpc_request *req,
 		}
 
 		entry = ll_sa_entry_get_byindex(sai, minfo->mi_cbdata);
-		if (entry == NULL) {
+		if (!entry) {
 			sai->sai_replied++;
 			spin_unlock(&lli->lli_sa_lock);
 			rc = -EIDRM;
@@ -756,7 +756,7 @@ out:
 		iput(dir);
 		kfree(minfo);
 	}
-	if (sai != NULL)
+	if (sai)
 		ll_sai_put(sai);
 	return rc;
 }
@@ -853,7 +853,7 @@ static int do_sa_revalidate(struct inode *dir, struct ll_sa_entry *entry,
 	struct ldlm_enqueue_info *einfo;
 	int rc;
 
-	if (unlikely(inode == NULL))
+	if (unlikely(!inode))
 		return 1;
 
 	if (d_mountpoint(dentry))
@@ -908,10 +908,9 @@ static void ll_statahead_one(struct dentry *parent, const char *entry_name,
 		rc = do_sa_revalidate(dir, entry, dentry);
 		if (rc == 1 && agl_should_run(sai, d_inode(dentry)))
 			ll_agl_add(sai, d_inode(dentry), entry->se_index);
-	}
 
-	if (dentry != NULL)
 		dput(dentry);
+	}
 
 	if (rc) {
 		rc1 = ll_sa_entry_to_stated(sai, entry,
@@ -1070,7 +1069,7 @@ static int ll_statahead_thread(void *arg)
 		}
 
 		dp = page_address(page);
-		for (ent = lu_dirent_start(dp); ent != NULL;
+		for (ent = lu_dirent_start(dp); ent;
 		     ent = lu_dirent_next(ent)) {
 			__u64 hash;
 			int namelen;
@@ -1274,7 +1273,7 @@ void ll_stop_statahead(struct inode *dir, void *key)
 {
 	struct ll_inode_info *lli = ll_i2info(dir);
 
-	if (unlikely(key == NULL))
+	if (unlikely(!key))
 		return;
 
 	spin_lock(&lli->lli_sa_lock);
@@ -1357,7 +1356,7 @@ static int is_first_dirent(struct inode *dir, struct dentry *dentry)
 		}
 
 		dp = page_address(page);
-		for (ent = lu_dirent_start(dp); ent != NULL;
+		for (ent = lu_dirent_start(dp); ent;
 		     ent = lu_dirent_next(ent)) {
 			__u64 hash;
 			int namelen;
@@ -1448,7 +1447,7 @@ ll_sai_unplug(struct ll_statahead_info *sai, struct ll_sa_entry *entry)
 	struct ll_sb_info    *sbi    = ll_i2sbi(sai->sai_inode);
 	int		   hit;
 
-	if (entry != NULL && entry->se_stat == SA_ENTRY_SUCC)
+	if (entry && entry->se_stat == SA_ENTRY_SUCC)
 		hit = 1;
 	else
 		hit = 0;
@@ -1540,7 +1539,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 		}
 
 		entry = ll_sa_entry_get_byname(sai, &(*dentryp)->d_name);
-		if (entry == NULL || only_unplug) {
+		if (!entry || only_unplug) {
 			ll_sai_unplug(sai, entry);
 			return entry ? 1 : -EAGAIN;
 		}
@@ -1559,8 +1558,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 			}
 		}
 
-		if (entry->se_stat == SA_ENTRY_SUCC &&
-		    entry->se_inode != NULL) {
+		if (entry->se_stat == SA_ENTRY_SUCC && entry->se_inode) {
 			struct inode *inode = entry->se_inode;
 			struct lookup_intent it = { .it_op = IT_GETATTR,
 						    .d.lustre.it_lock_handle =
@@ -1570,7 +1568,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 			rc = md_revalidate_lock(ll_i2mdexp(dir), &it,
 						ll_inode2fid(inode), &bits);
 			if (rc == 1) {
-				if (d_inode(*dentryp) == NULL) {
+				if (!d_inode(*dentryp)) {
 					struct dentry *alias;
 
 					alias = ll_splice_alias(inode,
@@ -1616,14 +1614,14 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 	}
 
 	sai = ll_sai_alloc();
-	if (sai == NULL) {
+	if (!sai) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	sai->sai_ls_all = (rc == LS_FIRST_DOT_DE);
 	sai->sai_inode = igrab(dir);
-	if (unlikely(sai->sai_inode == NULL)) {
+	if (unlikely(!sai->sai_inode)) {
 		CWARN("Do not start stat ahead on dying inode "DFID"\n",
 		      PFID(&lli->lli_fid));
 		rc = -ESTALE;
@@ -1669,7 +1667,7 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
 		 * reference from allocation time. */
 		ll_sai_put(sai);
 		ll_sai_put(sai);
-		LASSERT(lli->lli_sai == NULL);
+		LASSERT(!lli->lli_sai);
 		return -EAGAIN;
 	}
 
diff --git a/drivers/staging/lustre/lustre/llite/super25.c b/drivers/staging/lustre/lustre/llite/super25.c
index 86c371e..cd996f6 100644
--- a/drivers/staging/lustre/lustre/llite/super25.c
+++ b/drivers/staging/lustre/lustre/llite/super25.c
@@ -54,7 +54,7 @@ static struct inode *ll_alloc_inode(struct super_block *sb)
 
 	ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
 	lli = kmem_cache_alloc(ll_inode_cachep, GFP_NOFS | __GFP_ZERO);
-	if (lli == NULL)
+	if (!lli)
 		return NULL;
 
 	inode_init_once(&lli->lli_vfs_inode);
@@ -108,26 +108,26 @@ static int __init init_lustre_lite(void)
 					    sizeof(struct ll_inode_info),
 					    0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
 					    NULL);
-	if (ll_inode_cachep == NULL)
+	if (!ll_inode_cachep)
 		goto out_cache;
 
 	ll_file_data_slab = kmem_cache_create("ll_file_data",
 						 sizeof(struct ll_file_data), 0,
 						 SLAB_HWCACHE_ALIGN, NULL);
-	if (ll_file_data_slab == NULL)
+	if (!ll_file_data_slab)
 		goto out_cache;
 
 	ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
 						  sizeof(struct ll_remote_perm),
 						      0, 0, NULL);
-	if (ll_remote_perm_cachep == NULL)
+	if (!ll_remote_perm_cachep)
 		goto out_cache;
 
 	ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
 						   REMOTE_PERM_HASHSIZE *
 						   sizeof(struct list_head),
 						   0, 0, NULL);
-	if (ll_rmtperm_hash_cachep == NULL)
+	if (!ll_rmtperm_hash_cachep)
 		goto out_cache;
 
 	llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
diff --git a/drivers/staging/lustre/lustre/llite/symlink.c b/drivers/staging/lustre/lustre/llite/symlink.c
index 2610348..c2775b6 100644
--- a/drivers/staging/lustre/lustre/llite/symlink.c
+++ b/drivers/staging/lustre/lustre/llite/symlink.c
@@ -81,7 +81,6 @@ static int ll_readlink_internal(struct inode *inode,
 	}
 
 	body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 	if ((body->valid & OBD_MD_LINKNAME) == 0) {
 		CERROR("OBD_MD_LINKNAME not set on reply\n");
 		rc = -EPROTO;
@@ -97,7 +96,7 @@ static int ll_readlink_internal(struct inode *inode,
 	}
 
 	*symname = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_MD);
-	if (*symname == NULL ||
+	if (!*symname ||
 	    strnlen(*symname, symlen) != symlen - 1) {
 		/* not full/NULL terminated */
 		CERROR("inode %lu: symlink not NULL terminated string of length %d\n",
diff --git a/drivers/staging/lustre/lustre/llite/vvp_dev.c b/drivers/staging/lustre/lustre/llite/vvp_dev.c
index fdca4ec..6075ccf 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_dev.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_dev.c
@@ -80,7 +80,7 @@ static void *vvp_key_init(const struct lu_context *ctx,
 	struct vvp_thread_info *info;
 
 	info = kmem_cache_alloc(vvp_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -99,7 +99,7 @@ static void *vvp_session_key_init(const struct lu_context *ctx,
 	struct vvp_session *session;
 
 	session = kmem_cache_alloc(vvp_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (session == NULL)
+	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;
 }
@@ -228,7 +228,7 @@ int cl_sb_fini(struct super_block *sb)
 	if (!IS_ERR(env)) {
 		cld = sbi->ll_cl;
 
-		if (cld != NULL) {
+		if (cld) {
 			cl_stack_fini(env, cld);
 			sbi->ll_cl = NULL;
 			sbi->ll_site = NULL;
@@ -325,11 +325,11 @@ static struct cl_object *vvp_pgcache_obj(const struct lu_env *env,
 
 	cfs_hash_hlist_for_each(dev->ld_site->ls_obj_hash, id->vpi_bucket,
 				vvp_pgcache_obj_get, id);
-	if (id->vpi_obj != NULL) {
+	if (id->vpi_obj) {
 		struct lu_object *lu_obj;
 
 		lu_obj = lu_object_locate(id->vpi_obj, dev->ld_type);
-		if (lu_obj != NULL) {
+		if (lu_obj) {
 			lu_object_ref_add(lu_obj, "dump", current);
 			return lu2cl(lu_obj);
 		}
@@ -355,7 +355,7 @@ static loff_t vvp_pgcache_find(const struct lu_env *env,
 		if (id.vpi_bucket >= CFS_HASH_NHLIST(site->ls_obj_hash))
 			return ~0ULL;
 		clob = vvp_pgcache_obj(env, dev, &id);
-		if (clob != NULL) {
+		if (clob) {
 			struct cl_object_header *hdr;
 			int		      nr;
 			struct cl_page	  *pg;
@@ -443,7 +443,7 @@ static int vvp_pgcache_show(struct seq_file *f, void *v)
 		vvp_pgcache_id_unpack(pos, &id);
 		sbi = f->private;
 		clob = vvp_pgcache_obj(env, &sbi->ll_cl->cd_lu_dev, &id);
-		if (clob != NULL) {
+		if (clob) {
 			hdr = cl_object_header(clob);
 
 			spin_lock(&hdr->coh_page_guard);
@@ -452,7 +452,7 @@ static int vvp_pgcache_show(struct seq_file *f, void *v)
 
 			seq_printf(f, "%8x@"DFID": ",
 				   id.vpi_index, PFID(&hdr->coh_lu.loh_fid));
-			if (page != NULL) {
+			if (page) {
 				vvp_pgcache_page_show(env, f, page);
 				cl_page_put(env, page);
 			} else
diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c
index 573ab15..f856899 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_io.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_io.c
@@ -181,7 +181,7 @@ static void vvp_io_fault_fini(const struct lu_env *env,
 
 	CLOBINVRNT(env, io->ci_obj, ccc_object_invariant(io->ci_obj));
 
-	if (page != NULL) {
+	if (page) {
 		lu_ref_del(&page->cp_reference, "fault", io);
 		cl_page_put(env, page);
 		io->u.ci_fault.ft_page = NULL;
@@ -220,11 +220,11 @@ static int vvp_mmap_locks(const struct lu_env *env,
 	if (!cl_is_normalio(env, io))
 		return 0;
 
-	if (vio->cui_iter == NULL) /* nfs or loop back device write */
+	if (!vio->cui_iter) /* nfs or loop back device write */
 		return 0;
 
 	/* No MM (e.g. NFS)? No vmas too. */
-	if (mm == NULL)
+	if (!mm)
 		return 0;
 
 	iov_for_each(iov, i, *(vio->cui_iter)) {
@@ -587,7 +587,7 @@ static int vvp_io_write_start(const struct lu_env *env,
 
 	CDEBUG(D_VFSTRACE, "write: [%lli, %lli)\n", pos, pos + (long long)cnt);
 
-	if (cio->cui_iter == NULL) /* from a temp io in ll_cl_init(). */
+	if (!cio->cui_iter) /* from a temp io in ll_cl_init(). */
 		result = 0;
 	else
 		result = generic_file_write_iter(cio->cui_iocb, cio->cui_iter);
@@ -673,7 +673,7 @@ static int vvp_io_fault_start(const struct lu_env *env,
 
 	/* must return locked page */
 	if (fio->ft_mkwrite) {
-		LASSERT(cfio->ft_vmpage != NULL);
+		LASSERT(cfio->ft_vmpage);
 		lock_page(cfio->ft_vmpage);
 	} else {
 		result = vvp_io_kernel_fault(cfio);
@@ -792,7 +792,7 @@ static int vvp_io_fault_start(const struct lu_env *env,
 
 out:
 	/* return unlocked vmpage to avoid deadlocking */
-	if (vmpage != NULL)
+	if (vmpage)
 		unlock_page(vmpage);
 	cfio->fault.ft_flags &= ~VM_FAULT_LOCKED;
 	return result;
diff --git a/drivers/staging/lustre/lustre/llite/vvp_object.c b/drivers/staging/lustre/lustre/llite/vvp_object.c
index c82714e..8d7aa74 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_object.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_object.c
@@ -147,7 +147,7 @@ static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
 	if (conf->coc_opc != OBJECT_CONF_SET)
 		return 0;
 
-	if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL) {
+	if (conf->u.coc_md && conf->u.coc_md->lsm) {
 		CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
 		       PFID(&lli->lli_fid), lli->lli_layout_gen,
 		       conf->u.coc_md->lsm->lsm_layout_gen);
@@ -186,9 +186,8 @@ struct ccc_object *cl_inode2ccc(struct inode *inode)
 	struct cl_object     *obj = lli->lli_clob;
 	struct lu_object     *lu;
 
-	LASSERT(obj != NULL);
 	lu = lu_object_locate(obj->co_lu.lo_header, &vvp_device_type);
-	LASSERT(lu != NULL);
+	LASSERT(lu);
 	return lu2ccc(lu);
 }
 
diff --git a/drivers/staging/lustre/lustre/llite/vvp_page.c b/drivers/staging/lustre/lustre/llite/vvp_page.c
index a133475..f254ad5 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_page.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_page.c
@@ -56,7 +56,7 @@ static void vvp_page_fini_common(struct ccc_page *cp)
 {
 	struct page *vmpage = cp->cpg_page;
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	page_cache_release(vmpage);
 }
 
@@ -81,7 +81,7 @@ static int vvp_page_own(const struct lu_env *env,
 	struct ccc_page *vpg    = cl2ccc_page(slice);
 	struct page      *vmpage = vpg->cpg_page;
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	if (nonblock) {
 		if (!trylock_page(vmpage))
 			return -EAGAIN;
@@ -105,7 +105,7 @@ static void vvp_page_assume(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 	wait_on_page_writeback(vmpage);
 }
@@ -116,7 +116,7 @@ static void vvp_page_unassume(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 }
 
@@ -125,7 +125,7 @@ static void vvp_page_disown(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 
 	unlock_page(cl2vm_page(slice));
@@ -139,7 +139,7 @@ static void vvp_page_discard(const struct lu_env *env,
 	struct address_space *mapping;
 	struct ccc_page      *cpg     = cl2ccc_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 
 	mapping = vmpage->mapping;
@@ -161,7 +161,7 @@ static int vvp_page_unmap(const struct lu_env *env,
 	struct page *vmpage = cl2vm_page(slice);
 	__u64       offset;
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 
 	offset = vmpage->index << PAGE_CACHE_SHIFT;
@@ -199,7 +199,7 @@ static void vvp_page_export(const struct lu_env *env,
 {
 	struct page *vmpage = cl2vm_page(slice);
 
-	LASSERT(vmpage != NULL);
+	LASSERT(vmpage);
 	LASSERT(PageLocked(vmpage));
 	if (uptodate)
 		SetPageUptodate(vmpage);
@@ -290,7 +290,7 @@ static void vvp_page_completion_read(const struct lu_env *env,
 	} else
 		cp->cpg_defer_uptodate = 0;
 
-	if (page->cp_sync_io == NULL)
+	if (!page->cp_sync_io)
 		unlock_page(vmpage);
 }
 
@@ -317,7 +317,7 @@ static void vvp_page_completion_write(const struct lu_env *env,
 	cp->cpg_write_queued = 0;
 	vvp_write_complete(cl2ccc(slice->cpl_obj), cp);
 
-	if (pg->cp_sync_io != NULL) {
+	if (pg->cp_sync_io) {
 		LASSERT(PageLocked(vmpage));
 		LASSERT(!PageWriteback(vmpage));
 	} else {
@@ -385,7 +385,7 @@ static int vvp_page_print(const struct lu_env *env,
 	(*printer)(env, cookie, LUSTRE_VVP_NAME "-page@%p(%d:%d:%d) vm@%p ",
 		   vp, vp->cpg_defer_uptodate, vp->cpg_ra_used,
 		   vp->cpg_write_queued, vmpage);
-	if (vmpage != NULL) {
+	if (vmpage) {
 		(*printer)(env, cookie, "%lx %d:%d %lx %lu %slru",
 			   (long)vmpage->flags, page_count(vmpage),
 			   page_mapcount(vmpage), vmpage->private,
diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index fa477e7..8ccbf26 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -148,7 +148,7 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 	    (xattr_type == XATTR_ACL_ACCESS_T ||
 	    xattr_type == XATTR_ACL_DEFAULT_T)) {
 		rce = rct_search(&sbi->ll_rct, current_pid());
-		if (rce == NULL ||
+		if (!rce ||
 		    (rce->rce_ops != RMT_LSETFACL &&
 		    rce->rce_ops != RMT_RSETFACL))
 			return -EOPNOTSUPP;
@@ -158,7 +158,6 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 
 			ee = et_search_del(&sbi->ll_et, current_pid(),
 					   ll_inode2fid(inode), xattr_type);
-			LASSERT(ee != NULL);
 			if (valid & OBD_MD_FLXATTR) {
 				acl = lustre_acl_xattr_merge2ext(
 						(posix_acl_xattr_header *)value,
@@ -196,7 +195,7 @@ int ll_setxattr_common(struct inode *inode, const char *name,
 	 * Release the posix ACL space.
 	 */
 	kfree(new_value);
-	if (acl != NULL)
+	if (acl)
 		lustre_ext_acl_xattr_free(acl);
 #endif
 	if (rc) {
@@ -239,10 +238,10 @@ int ll_setxattr(struct dentry *dentry, const char *name,
 		/* Attributes that are saved via getxattr will always have
 		 * the stripe_offset as 0.  Instead, the MDS should be
 		 * allowed to pick the starting OST index.   b=17846 */
-		if (lump != NULL && lump->lmm_stripe_offset == 0)
+		if (lump && lump->lmm_stripe_offset == 0)
 			lump->lmm_stripe_offset = -1;
 
-		if (lump != NULL && S_ISREG(inode->i_mode)) {
+		if (lump && S_ISREG(inode->i_mode)) {
 			int flags = FMODE_WRITE;
 			int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
 				sizeof(*lump) : sizeof(struct lov_user_md_v3);
@@ -324,7 +323,7 @@ int ll_getxattr_common(struct inode *inode, const char *name,
 	    (xattr_type == XATTR_ACL_ACCESS_T ||
 	    xattr_type == XATTR_ACL_DEFAULT_T)) {
 		rce = rct_search(&sbi->ll_rct, current_pid());
-		if (rce == NULL ||
+		if (!rce ||
 		    (rce->rce_ops != RMT_LSETFACL &&
 		    rce->rce_ops != RMT_LGETFACL &&
 		    rce->rce_ops != RMT_RSETFACL &&
@@ -365,7 +364,7 @@ do_getxattr:
 			goto out_xattr;
 
 		/* Add "system.posix_acl_access" to the list */
-		if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
+		if (lli->lli_posix_acl && valid & OBD_MD_FLXATTRLS) {
 			if (size == 0) {
 				rc += sizeof(XATTR_NAME_ACL_ACCESS);
 			} else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
@@ -487,7 +486,7 @@ ssize_t ll_getxattr(struct dentry *dentry, const char *name,
 		}
 
 		lsm = ccc_inode_lsm_get(inode);
-		if (lsm == NULL) {
+		if (!lsm) {
 			if (S_ISDIR(inode->i_mode)) {
 				rc = ll_dir_getstripe(inode, &lmm,
 						      &lmmsize, &request);
@@ -559,7 +558,7 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 	if (rc < 0)
 		goto out;
 
-	if (buffer != NULL) {
+	if (buffer) {
 		struct ll_sb_info *sbi = ll_i2sbi(inode);
 		char *xattr_name = buffer;
 		int xlen, rem = rc;
@@ -597,12 +596,12 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 		const size_t name_len   = sizeof("lov") - 1;
 		const size_t total_len  = prefix_len + name_len + 1;
 
-		if (((rc + total_len) > size) && (buffer != NULL)) {
+		if (((rc + total_len) > size) && buffer) {
 			ptlrpc_req_finished(request);
 			return -ERANGE;
 		}
 
-		if (buffer != NULL) {
+		if (buffer) {
 			buffer += rc;
 			memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
 			memcpy(buffer + prefix_len, "lov", name_len);
diff --git a/drivers/staging/lustre/lustre/llite/xattr_cache.c b/drivers/staging/lustre/lustre/llite/xattr_cache.c
index d140276..ed6e073 100644
--- a/drivers/staging/lustre/lustre/llite/xattr_cache.c
+++ b/drivers/staging/lustre/lustre/llite/xattr_cache.c
@@ -59,9 +59,6 @@ void ll_xattr_fini(void)
  */
 static void ll_xattr_cache_init(struct ll_inode_info *lli)
 {
-
-	LASSERT(lli != NULL);
-
 	INIT_LIST_HEAD(&lli->lli_xattrs);
 	lli->lli_flags |= LLIF_XATTR_CACHE;
 }
@@ -83,8 +80,7 @@ static int ll_xattr_cache_find(struct list_head *cache,
 
 	list_for_each_entry(entry, cache, xe_list) {
 		/* xattr_name == NULL means look for any entry */
-		if (xattr_name == NULL ||
-		    strcmp(xattr_name, entry->xe_name) == 0) {
+		if (!xattr_name || strcmp(xattr_name, entry->xe_name) == 0) {
 			*xattr = entry;
 			CDEBUG(D_CACHE, "find: [%s]=%.*s\n",
 			       entry->xe_name, entry->xe_vallen,
@@ -118,7 +114,7 @@ static int ll_xattr_cache_add(struct list_head *cache,
 	}
 
 	xattr = kmem_cache_alloc(xattr_kmem, GFP_NOFS | __GFP_ZERO);
-	if (xattr == NULL) {
+	if (!xattr) {
 		CDEBUG(D_CACHE, "failed to allocate xattr\n");
 		return -ENOMEM;
 	}
@@ -359,7 +355,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 	}
 
 	/* Matched but no cache? Cancelled on error by a parallel refill. */
-	if (unlikely(req == NULL)) {
+	if (unlikely(!req)) {
 		CDEBUG(D_CACHE, "cancelled by a parallel getxattr\n");
 		rc = -EIO;
 		goto out_maybe_drop;
@@ -376,7 +372,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		CERROR("no MDT BODY in the refill xattr reply\n");
 		rc = -EPROTO;
 		goto out_destroy;
@@ -388,7 +384,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 						body->aclsize);
 	xsizes = req_capsule_server_sized_get(&req->rq_pill, &RMF_EAVALS_LENS,
 					      body->max_mdsize * sizeof(__u32));
-	if (xdata == NULL || xval == NULL || xsizes == NULL) {
+	if (!xdata || !xval || !xsizes) {
 		CERROR("wrong setxattr reply\n");
 		rc = -EPROTO;
 		goto out_destroy;
@@ -404,7 +400,7 @@ static int ll_xattr_cache_refill(struct inode *inode, struct lookup_intent *oit)
 	for (i = 0; i < body->max_mdsize; i++) {
 		CDEBUG(D_CACHE, "caching [%s]=%.*s\n", xdata, *xsizes, xval);
 		/* Perform consistency checks: attr names and vals in pill */
-		if (memchr(xdata, 0, xtail - xdata) == NULL) {
+		if (!memchr(xdata, 0, xtail - xdata)) {
 			CERROR("xattr protocol violation (names are broken)\n");
 			rc = -EPROTO;
 		} else if (xval + *xsizes > xvtail) {
-- 
2.1.0

[PATCH 15/45] staging/lustre/ldlm: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/ldlm/interval_tree.c |  2 -
 drivers/staging/lustre/lustre/ldlm/ldlm_extent.c   |  9 ++-
 drivers/staging/lustre/lustre/ldlm/ldlm_flock.c    | 13 ++---
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c      | 16 +++---
 drivers/staging/lustre/lustre/ldlm/ldlm_lock.c     | 65 +++++++++++-----------
 drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c    | 45 ++++++++-------
 drivers/staging/lustre/lustre/ldlm/ldlm_pool.c     | 17 +++---
 drivers/staging/lustre/lustre/ldlm/ldlm_request.c  | 65 +++++++++++-----------
 drivers/staging/lustre/lustre/ldlm/ldlm_resource.c | 25 ++++-----
 9 files changed, 123 insertions(+), 134 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ldlm/interval_tree.c b/drivers/staging/lustre/lustre/ldlm/interval_tree.c
index a2ea8e5..fd70f65 100644
--- a/drivers/staging/lustre/lustre/ldlm/interval_tree.c
+++ b/drivers/staging/lustre/lustre/ldlm/interval_tree.c
@@ -49,13 +49,11 @@ enum {
 
 static inline int node_is_left_child(struct interval_node *node)
 {
-	LASSERT(node->in_parent != NULL);
 	return node == node->in_parent->in_left;
 }
 
 static inline int node_is_right_child(struct interval_node *node)
 {
-	LASSERT(node->in_parent != NULL);
 	return node == node->in_parent->in_right;
 }
 
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c b/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
index 9c70f31..aa92682 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
@@ -113,7 +113,7 @@ struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock)
 
 	LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
 	node = kmem_cache_alloc(ldlm_interval_slab, GFP_NOFS | __GFP_ZERO);
-	if (node == NULL)
+	if (!node)
 		return NULL;
 
 	INIT_LIST_HEAD(&node->li_group);
@@ -134,7 +134,7 @@ struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l)
 {
 	struct ldlm_interval *n = l->l_tree_node;
 
-	if (n == NULL)
+	if (!n)
 		return NULL;
 
 	LASSERT(!list_empty(&n->li_group));
@@ -168,7 +168,7 @@ void ldlm_extent_add_lock(struct ldlm_resource *res,
 	LASSERT(lock->l_granted_mode == lock->l_req_mode);
 
 	node = lock->l_tree_node;
-	LASSERT(node != NULL);
+	LASSERT(node);
 	LASSERT(!interval_is_intree(&node->li_node));
 
 	idx = lock_mode_to_index(lock->l_granted_mode);
@@ -185,7 +185,6 @@ void ldlm_extent_add_lock(struct ldlm_resource *res,
 		struct ldlm_interval *tmp;
 
 		tmp = ldlm_interval_detach(lock);
-		LASSERT(tmp != NULL);
 		ldlm_interval_free(tmp);
 		ldlm_interval_attach(to_ldlm_interval(found), lock);
 	}
@@ -211,7 +210,7 @@ void ldlm_extent_unlink_lock(struct ldlm_lock *lock)
 	LASSERT(lock->l_granted_mode == 1 << idx);
 	tree = &res->lr_itree[idx];
 
-	LASSERT(tree->lit_root != NULL); /* assure the tree is not null */
+	LASSERT(tree->lit_root); /* assure the tree is not null */
 
 	tree->lit_size--;
 	node = ldlm_interval_detach(lock);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
index 4310154..7c671e3 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
@@ -361,7 +361,7 @@ reprocess:
 		lock->l_policy_data.l_flock.start =
 			new->l_policy_data.l_flock.end + 1;
 		new2->l_conn_export = lock->l_conn_export;
-		if (lock->l_export != NULL) {
+		if (lock->l_export) {
 			new2->l_export = class_export_lock_get(lock->l_export,
 							       new2);
 			if (new2->l_export->exp_lock_hash &&
@@ -381,7 +381,7 @@ reprocess:
 	}
 
 	/* if new2 is created but never used, destroy it*/
-	if (splitted == 0 && new2 != NULL)
+	if (splitted == 0 && new2)
 		ldlm_lock_destroy_nolock(new2);
 
 	/* At this point we're granting the lock request. */
@@ -462,8 +462,7 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
 	if ((lock->l_flags & (LDLM_FL_FAILED|LDLM_FL_LOCAL_ONLY)) ==
 	    (LDLM_FL_FAILED|LDLM_FL_LOCAL_ONLY)) {
 		if (lock->l_req_mode == lock->l_granted_mode &&
-		    lock->l_granted_mode != LCK_NL &&
-		    data == NULL)
+		    lock->l_granted_mode != LCK_NL && !data)
 			ldlm_lock_decref_internal(lock, lock->l_req_mode);
 
 		/* Need to wake up the waiter if we were evicted */
@@ -475,7 +474,7 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
 
 	if (!(flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
 		       LDLM_FL_BLOCK_CONV))) {
-		if (data == NULL)
+		if (!data)
 			/* mds granted the lock in the reply */
 			goto granted;
 		/* CP AST RPC: lock get granted, wake it up */
@@ -488,10 +487,10 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
 	obd = class_exp2obd(lock->l_conn_export);
 
 	/* if this is a local lock, there is no import */
-	if (obd != NULL)
+	if (obd)
 		imp = obd->u.cli.cl_import;
 
-	if (imp != NULL) {
+	if (imp) {
 		spin_lock(&imp->imp_lock);
 		fwd.fwd_generation = imp->imp_generation;
 		spin_unlock(&imp->imp_lock);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index 774d89c..0e25c45 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -373,7 +373,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 			   &obddev->obd_ldlm_client);
 
 	imp = class_new_import(obddev);
-	if (imp == NULL) {
+	if (!imp) {
 		rc = -ENOENT;
 		goto err_ldlm;
 	}
@@ -409,7 +409,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 						   LDLM_NAMESPACE_CLIENT,
 						   LDLM_NAMESPACE_GREEDY,
 						   ns_type);
-	if (obddev->obd_namespace == NULL) {
+	if (!obddev->obd_namespace) {
 		CERROR("Unable to create client namespace - %s\n",
 		       obddev->obd_name);
 		rc = -ENOMEM;
@@ -435,7 +435,7 @@ int client_obd_cleanup(struct obd_device *obddev)
 	ldlm_namespace_free_post(obddev->obd_namespace);
 	obddev->obd_namespace = NULL;
 
-	LASSERT(obddev->u.cli.cl_import == NULL);
+	LASSERT(!obddev->u.cli.cl_import);
 
 	ldlm_put_ref();
 	return 0;
@@ -486,7 +486,7 @@ int client_connect_import(const struct lu_env *env,
 		LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
 		goto out_ldlm;
 	}
-	LASSERT(*exp != NULL && (*exp)->exp_connection);
+	LASSERT(*exp && (*exp)->exp_connection);
 
 	if (data) {
 		LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
@@ -555,7 +555,7 @@ int client_disconnect_export(struct obd_export *exp)
 	 * never added.) */
 	(void)ptlrpc_pinger_del_import(imp);
 
-	if (obd->obd_namespace != NULL) {
+	if (obd->obd_namespace) {
 		/* obd_force == local only */
 		ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
 				       obd->obd_force ? LCF_LOCAL : 0, NULL);
@@ -642,14 +642,14 @@ void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
 
 	svcpt = req->rq_rqbd->rqbd_svcpt;
 	rs = req->rq_reply_state;
-	if (rs == NULL || !rs->rs_difficult) {
+	if (!rs || !rs->rs_difficult) {
 		/* no notifiers */
 		target_send_reply_msg(req, rc, fail_id);
 		return;
 	}
 
 	/* must be an export if locks saved */
-	LASSERT(req->rq_export != NULL);
+	LASSERT(req->rq_export);
 	/* req/reply consistent */
 	LASSERT(rs->rs_svcpt == svcpt);
 
@@ -658,7 +658,7 @@ void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
 	LASSERT(!rs->rs_scheduled_ever);
 	LASSERT(!rs->rs_handled);
 	LASSERT(!rs->rs_on_net);
-	LASSERT(rs->rs_export == NULL);
+	LASSERT(!rs->rs_export);
 	LASSERT(list_empty(&rs->rs_obd_list));
 	LASSERT(list_empty(&rs->rs_exp_list));
 
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
index cf9ec0c..4fd735f 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
@@ -412,11 +412,10 @@ static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
 {
 	struct ldlm_lock *lock;
 
-	if (resource == NULL)
-		LBUG();
+	LASSERT(resource);
 
 	lock = kmem_cache_alloc(ldlm_lock_slab, GFP_NOFS | __GFP_ZERO);
-	if (lock == NULL)
+	if (!lock)
 		return NULL;
 
 	spin_lock_init(&lock->l_lock);
@@ -485,7 +484,7 @@ int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
 	unlock_res_and_lock(lock);
 
 	newres = ldlm_resource_get(ns, NULL, new_resid, type, 1);
-	if (newres == NULL)
+	if (!newres)
 		return -ENOMEM;
 
 	lu_ref_add(&newres->lr_reference, "lock", lock);
@@ -547,7 +546,7 @@ struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
 	LASSERT(handle);
 
 	lock = class_handle2object(handle->cookie);
-	if (lock == NULL)
+	if (!lock)
 		return NULL;
 
 	/* It's unlikely but possible that someone marked the lock as
@@ -559,7 +558,7 @@ struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
 
 	lock_res_and_lock(lock);
 
-	LASSERT(lock->l_resource != NULL);
+	LASSERT(lock->l_resource);
 
 	lu_ref_add_atomic(&lock->l_reference, "handle", current);
 	if (unlikely(lock->l_flags & LDLM_FL_DESTROYED)) {
@@ -617,7 +616,7 @@ static void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
 		LASSERT(list_empty(&lock->l_bl_ast));
 		list_add(&lock->l_bl_ast, work_list);
 		LDLM_LOCK_GET(lock);
-		LASSERT(lock->l_blocking_lock == NULL);
+		LASSERT(!lock->l_blocking_lock);
 		lock->l_blocking_lock = LDLM_LOCK_GET(new);
 	}
 }
@@ -664,7 +663,7 @@ void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
 	struct ldlm_lock *lock;
 
 	lock = ldlm_handle2lock(lockh);
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	ldlm_lock_addref_internal(lock, mode);
 	LDLM_LOCK_PUT(lock);
 }
@@ -708,7 +707,7 @@ int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
 
 	result = -EAGAIN;
 	lock = ldlm_handle2lock(lockh);
-	if (lock != NULL) {
+	if (lock) {
 		lock_res_and_lock(lock);
 		if (lock->l_readers != 0 || lock->l_writers != 0 ||
 		    !(lock->l_flags & LDLM_FL_CBPENDING)) {
@@ -835,7 +834,7 @@ void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
 {
 	struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
 
-	LASSERTF(lock != NULL, "Non-existing lock: %#llx\n", lockh->cookie);
+	LASSERTF(lock, "Non-existing lock: %#llx\n", lockh->cookie);
 	ldlm_lock_decref_internal(lock, mode);
 	LDLM_LOCK_PUT(lock);
 }
@@ -852,7 +851,7 @@ void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
 {
 	struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
 
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 
 	LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
 	lock_res_and_lock(lock);
@@ -1037,7 +1036,7 @@ void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
 	if (lock->l_granted_mode < res->lr_most_restr)
 		res->lr_most_restr = lock->l_granted_mode;
 
-	if (work_list && lock->l_completion_ast != NULL)
+	if (work_list && lock->l_completion_ast)
 		ldlm_add_ast_work_item(lock, NULL, work_list);
 
 	ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
@@ -1201,7 +1200,7 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 	struct ldlm_lock *lock, *old_lock = NULL;
 	int rc = 0;
 
-	if (ns == NULL) {
+	if (!ns) {
 		old_lock = ldlm_handle2lock(lockh);
 		LASSERT(old_lock);
 
@@ -1212,8 +1211,8 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 	}
 
 	res = ldlm_resource_get(ns, NULL, res_id, type, 0);
-	if (res == NULL) {
-		LASSERT(old_lock == NULL);
+	if (!res) {
+		LASSERT(!old_lock);
 		return 0;
 	}
 
@@ -1222,7 +1221,7 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 
 	lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
 			    flags, unref);
-	if (lock != NULL) {
+	if (lock) {
 		rc = 1;
 		goto out;
 	}
@@ -1232,7 +1231,7 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 	}
 	lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
 			    flags, unref);
-	if (lock != NULL) {
+	if (lock) {
 		rc = 1;
 		goto out;
 	}
@@ -1324,7 +1323,7 @@ ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
 	ldlm_mode_t mode = 0;
 
 	lock = ldlm_handle2lock(lockh);
-	if (lock != NULL) {
+	if (lock) {
 		lock_res_and_lock(lock);
 		if (lock->l_flags & LDLM_FL_GONE_MASK)
 			goto out;
@@ -1340,7 +1339,7 @@ ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
 	}
 
 out:
-	if (lock != NULL) {
+	if (lock) {
 		unlock_res_and_lock(lock);
 		LDLM_LOCK_PUT(lock);
 	}
@@ -1354,7 +1353,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 {
 	void *lvb;
 
-	LASSERT(data != NULL);
+	LASSERT(data);
 	LASSERT(size >= 0);
 
 	switch (lock->l_lvb_type) {
@@ -1368,7 +1367,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 				lvb = req_capsule_server_swab_get(pill,
 						&RMF_DLM_LVB,
 						lustre_swab_ost_lvb);
-			if (unlikely(lvb == NULL)) {
+			if (unlikely(!lvb)) {
 				LDLM_ERROR(lock, "no LVB");
 				return -EPROTO;
 			}
@@ -1385,7 +1384,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 				lvb = req_capsule_server_sized_swab_get(pill,
 						&RMF_DLM_LVB, size,
 						lustre_swab_ost_lvb_v1);
-			if (unlikely(lvb == NULL)) {
+			if (unlikely(!lvb)) {
 				LDLM_ERROR(lock, "no LVB");
 				return -EPROTO;
 			}
@@ -1410,7 +1409,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 				lvb = req_capsule_server_swab_get(pill,
 						&RMF_DLM_LVB,
 						lustre_swab_lquota_lvb);
-			if (unlikely(lvb == NULL)) {
+			if (unlikely(!lvb)) {
 				LDLM_ERROR(lock, "no LVB");
 				return -EPROTO;
 			}
@@ -1431,7 +1430,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 			lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
 		else
 			lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
-		if (unlikely(lvb == NULL)) {
+		if (unlikely(!lvb)) {
 			LDLM_ERROR(lock, "no LVB");
 			return -EPROTO;
 		}
@@ -1463,12 +1462,12 @@ struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
 	struct ldlm_resource *res;
 
 	res = ldlm_resource_get(ns, NULL, res_id, type, 1);
-	if (res == NULL)
+	if (!res)
 		return NULL;
 
 	lock = ldlm_lock_new(res);
 
-	if (lock == NULL)
+	if (!lock)
 		return NULL;
 
 	lock->l_req_mode = mode;
@@ -1483,7 +1482,7 @@ struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
 	lock->l_tree_node = NULL;
 	/* if this is the extent lock, allocate the interval tree node */
 	if (type == LDLM_EXTENT) {
-		if (ldlm_interval_alloc(lock) == NULL)
+		if (!ldlm_interval_alloc(lock))
 			goto out;
 	}
 
@@ -1633,7 +1632,7 @@ ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
 	lock->l_flags &= ~LDLM_FL_CP_REQD;
 	unlock_res_and_lock(lock);
 
-	if (completion_callback != NULL)
+	if (completion_callback)
 		rc = completion_callback(lock, 0, (void *)arg);
 	LDLM_LOCK_RELEASE(lock);
 
@@ -1752,7 +1751,7 @@ int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
 	 * to keep the number of requests in flight to ns_max_parallel_ast */
 	arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
 				     work_ast_lock, arg);
-	if (arg->set == NULL) {
+	if (!arg->set) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1846,7 +1845,7 @@ int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
 	int rc = -EINVAL;
 
 	if (lock) {
-		if (lock->l_ast_data == NULL)
+		if (!lock->l_ast_data)
 			lock->l_ast_data = data;
 		if (lock->l_ast_data == data)
 			rc = 0;
@@ -1874,7 +1873,7 @@ void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
 		return;
 
 	lock = ldlm_handle2lock(lockh);
-	if (lock == NULL)
+	if (!lock)
 		return;
 
 	LDLM_DEBUG_LIMIT(level, lock, "###");
@@ -1900,13 +1899,13 @@ void _ldlm_lock_debug(struct ldlm_lock *lock,
 
 	if (exp && exp->exp_connection) {
 		nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
-	} else if (exp && exp->exp_obd != NULL) {
+	} else if (exp && exp->exp_obd) {
 		struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 
 		nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
 	}
 
-	if (resource == NULL) {
+	if (!resource) {
 		libcfs_debug_vmsg2(msgdata, fmt, args,
 				   " ns: \?\? lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: \?\? rrc=\?\? type: \?\?\? flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
 				   lock,
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c
index 79aeb2b..0737ded 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c
@@ -136,7 +136,7 @@ void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
 		CDEBUG(D_DLMTRACE,
 		       "Lock %p already unused, calling callback (%p)\n", lock,
 		       lock->l_blocking_ast);
-		if (lock->l_blocking_ast != NULL)
+		if (lock->l_blocking_ast)
 			lock->l_blocking_ast(lock, ld, lock->l_ast_data,
 					     LDLM_CB_BLOCKING);
 	} else {
@@ -185,7 +185,7 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
 	} else if (lvb_len > 0) {
 		if (lock->l_lvb_len > 0) {
 			/* for extent lock, lvb contains ost_lvb{}. */
-			LASSERT(lock->l_lvb_data != NULL);
+			LASSERT(lock->l_lvb_data);
 
 			if (unlikely(lock->l_lvb_len < lvb_len)) {
 				LDLM_ERROR(lock, "Replied LVB is larger than expectation, expected = %d, replied = %d",
@@ -205,7 +205,7 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
 			}
 
 			lock_res_and_lock(lock);
-			LASSERT(lock->l_lvb_data == NULL);
+			LASSERT(!lock->l_lvb_data);
 			lock->l_lvb_type = LVB_T_LAYOUT;
 			lock->l_lvb_data = lvb_data;
 			lock->l_lvb_len = lvb_len;
@@ -312,10 +312,10 @@ static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
 
 	LDLM_DEBUG(lock, "client glimpse AST callback handler");
 
-	if (lock->l_glimpse_ast != NULL)
+	if (lock->l_glimpse_ast)
 		rc = lock->l_glimpse_ast(lock, req);
 
-	if (req->rq_repmsg != NULL) {
+	if (req->rq_repmsg) {
 		ptlrpc_reply(req);
 	} else {
 		req->rq_status = rc;
@@ -393,7 +393,7 @@ static inline void init_blwi(struct ldlm_bl_work_item *blwi,
 
 	blwi->blwi_ns = ns;
 	blwi->blwi_flags = cancel_flags;
-	if (ld != NULL)
+	if (ld)
 		blwi->blwi_ld = *ld;
 	if (count) {
 		list_add(&blwi->blwi_head, cancels);
@@ -470,14 +470,14 @@ static int ldlm_handle_setinfo(struct ptlrpc_request *req)
 	req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
 
 	key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
-	if (key == NULL) {
+	if (!key) {
 		DEBUG_REQ(D_IOCTL, req, "no set_info key");
 		return -EFAULT;
 	}
 	keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
 				      RCL_CLIENT);
 	val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
-	if (val == NULL) {
+	if (!val) {
 		DEBUG_REQ(D_IOCTL, req, "no set_info val");
 		return -EFAULT;
 	}
@@ -519,7 +519,7 @@ static int ldlm_handle_qc_callback(struct ptlrpc_request *req)
 	struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
 
 	oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
-	if (oqctl == NULL) {
+	if (!oqctl) {
 		CERROR("Can't unpack obd_quotactl\n");
 		return -EPROTO;
 	}
@@ -549,15 +549,14 @@ static int ldlm_callback_handler(struct ptlrpc_request *req)
 
 	req_capsule_init(&req->rq_pill, req, RCL_SERVER);
 
-	if (req->rq_export == NULL) {
+	if (!req->rq_export) {
 		rc = ldlm_callback_reply(req, -ENOTCONN);
 		ldlm_callback_errmsg(req, "Operate on unconnected server",
 				     rc, NULL);
 		return 0;
 	}
 
-	LASSERT(req->rq_export != NULL);
-	LASSERT(req->rq_export->exp_obd != NULL);
+	LASSERT(req->rq_export->exp_obd);
 
 	switch (lustre_msg_get_opc(req->rq_reqmsg)) {
 	case LDLM_BL_CALLBACK:
@@ -591,12 +590,12 @@ static int ldlm_callback_handler(struct ptlrpc_request *req)
 	}
 
 	ns = req->rq_export->exp_obd->obd_namespace;
-	LASSERT(ns != NULL);
+	LASSERT(ns);
 
 	req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
 
 	dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
-	if (dlm_req == NULL) {
+	if (!dlm_req) {
 		rc = ldlm_callback_reply(req, -EPROTO);
 		ldlm_callback_errmsg(req, "Operate without parameter", rc,
 				     NULL);
@@ -781,17 +780,17 @@ static int ldlm_bl_thread_main(void *arg)
 
 		blwi = ldlm_bl_get_work(blp);
 
-		if (blwi == NULL) {
+		if (!blwi) {
 			atomic_dec(&blp->blp_busy_threads);
 			l_wait_event_exclusive(blp->blp_waitq,
-					 (blwi = ldlm_bl_get_work(blp)) != NULL,
+					 (blwi = ldlm_bl_get_work(blp)),
 					 &lwi);
 			busy = atomic_inc_return(&blp->blp_busy_threads);
 		} else {
 			busy = atomic_read(&blp->blp_busy_threads);
 		}
 
-		if (blwi->blwi_ns == NULL)
+		if (!blwi->blwi_ns)
 			/* added by ldlm_cleanup() */
 			break;
 
@@ -915,7 +914,7 @@ static int ldlm_setup(void)
 	int rc = 0;
 	int i;
 
-	if (ldlm_state != NULL)
+	if (ldlm_state)
 		return -EALREADY;
 
 	ldlm_state = kzalloc(sizeof(*ldlm_state), GFP_NOFS);
@@ -1040,7 +1039,7 @@ static int ldlm_cleanup(void)
 
 	ldlm_pools_fini();
 
-	if (ldlm_state->ldlm_bl_pool != NULL) {
+	if (ldlm_state->ldlm_bl_pool) {
 		struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
 
 		while (atomic_read(&blp->blp_num_threads) > 0) {
@@ -1059,7 +1058,7 @@ static int ldlm_cleanup(void)
 		kfree(blp);
 	}
 
-	if (ldlm_state->ldlm_cb_service != NULL)
+	if (ldlm_state->ldlm_cb_service)
 		ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
 
 	if (ldlm_ns_kset)
@@ -1085,13 +1084,13 @@ int ldlm_init(void)
 	ldlm_resource_slab = kmem_cache_create("ldlm_resources",
 					       sizeof(struct ldlm_resource), 0,
 					       SLAB_HWCACHE_ALIGN, NULL);
-	if (ldlm_resource_slab == NULL)
+	if (!ldlm_resource_slab)
 		return -ENOMEM;
 
 	ldlm_lock_slab = kmem_cache_create("ldlm_locks",
 			      sizeof(struct ldlm_lock), 0,
 			      SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU, NULL);
-	if (ldlm_lock_slab == NULL) {
+	if (!ldlm_lock_slab) {
 		kmem_cache_destroy(ldlm_resource_slab);
 		return -ENOMEM;
 	}
@@ -1099,7 +1098,7 @@ int ldlm_init(void)
 	ldlm_interval_slab = kmem_cache_create("interval_node",
 					sizeof(struct ldlm_interval),
 					0, SLAB_HWCACHE_ALIGN, NULL);
-	if (ldlm_interval_slab == NULL) {
+	if (!ldlm_interval_slab) {
 		kmem_cache_destroy(ldlm_resource_slab);
 		kmem_cache_destroy(ldlm_lock_slab);
 		return -ENOMEM;
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
index 3d7c137..3e937b0 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
@@ -246,7 +246,6 @@ static void ldlm_cli_pool_pop_slv(struct ldlm_pool *pl)
 	 */
 	obd = container_of(pl, struct ldlm_namespace,
 			   ns_pool)->ns_obd;
-	LASSERT(obd != NULL);
 	read_lock(&obd->obd_pool_lock);
 	pl->pl_server_lock_volume = obd->obd_pool_slv;
 	atomic_set(&pl->pl_limit, obd->obd_pool_limit);
@@ -381,7 +380,7 @@ static int ldlm_pool_recalc(struct ldlm_pool *pl)
 	spin_unlock(&pl->pl_lock);
 
  recalc:
-	if (pl->pl_ops->po_recalc != NULL) {
+	if (pl->pl_ops->po_recalc) {
 		count = pl->pl_ops->po_recalc(pl);
 		lprocfs_counter_add(pl->pl_stats, LDLM_POOL_RECALC_STAT,
 				    count);
@@ -409,7 +408,7 @@ static int ldlm_pool_shrink(struct ldlm_pool *pl, int nr, gfp_t gfp_mask)
 {
 	int cancel = 0;
 
-	if (pl->pl_ops->po_shrink != NULL) {
+	if (pl->pl_ops->po_shrink) {
 		cancel = pl->pl_ops->po_shrink(pl, nr, gfp_mask);
 		if (nr > 0) {
 			lprocfs_counter_add(pl->pl_stats,
@@ -643,11 +642,11 @@ static void ldlm_pool_sysfs_fini(struct ldlm_pool *pl)
 
 static void ldlm_pool_debugfs_fini(struct ldlm_pool *pl)
 {
-	if (pl->pl_stats != NULL) {
+	if (pl->pl_stats) {
 		lprocfs_free_stats(&pl->pl_stats);
 		pl->pl_stats = NULL;
 	}
-	if (pl->pl_debugfs_entry != NULL) {
+	if (pl->pl_debugfs_entry) {
 		ldebugfs_remove(&pl->pl_debugfs_entry);
 		pl->pl_debugfs_entry = NULL;
 	}
@@ -834,7 +833,7 @@ static unsigned long ldlm_pools_count(ldlm_side_t client, gfp_t gfp_mask)
 			continue;
 		}
 
-		if (ns_old == NULL)
+		if (!ns_old)
 			ns_old = ns;
 
 		ldlm_namespace_get(ns);
@@ -957,7 +956,7 @@ static int ldlm_pools_recalc(ldlm_side_t client)
 			continue;
 		}
 
-		if (ns_old == NULL)
+		if (!ns_old)
 			ns_old = ns;
 
 		spin_lock(&ns->ns_lock);
@@ -1040,7 +1039,7 @@ static int ldlm_pools_thread_start(void)
 	struct l_wait_info lwi = { 0 };
 	struct task_struct *task;
 
-	if (ldlm_pools_thread != NULL)
+	if (ldlm_pools_thread)
 		return -EALREADY;
 
 	ldlm_pools_thread = kzalloc(sizeof(*ldlm_pools_thread), GFP_NOFS);
@@ -1065,7 +1064,7 @@ static int ldlm_pools_thread_start(void)
 
 static void ldlm_pools_thread_stop(void)
 {
-	if (ldlm_pools_thread == NULL)
+	if (!ldlm_pools_thread)
 		return;
 
 	thread_set_flags(ldlm_pools_thread, SVC_STOPPING);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_request.c b/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
index b9eb377..de276af 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
@@ -94,7 +94,7 @@ static int ldlm_expired_completion_wait(void *data)
 	struct obd_import *imp;
 	struct obd_device *obd;
 
-	if (lock->l_conn_export == NULL) {
+	if (!lock->l_conn_export) {
 		static unsigned long next_dump, last_dump;
 
 		LCONSOLE_WARN("lock timed out (enqueued at %lld, %llds ago)\n",
@@ -239,7 +239,7 @@ noreproc:
 	obd = class_exp2obd(lock->l_conn_export);
 
 	/* if this is a local lock, then there is no import */
-	if (obd != NULL)
+	if (obd)
 		imp = obd->u.cli.cl_import;
 
 	/* Wait a long time for enqueue - server may have to callback a
@@ -258,7 +258,7 @@ noreproc:
 				       interrupted_completion_wait, &lwd);
 	}
 
-	if (imp != NULL) {
+	if (imp) {
 		spin_lock(&imp->imp_lock);
 		lwd.lwd_conn_cnt = imp->imp_conn_cnt;
 		spin_unlock(&imp->imp_lock);
@@ -363,13 +363,13 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 
 	/* Before we return, swab the reply */
 	reply = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	if (reply == NULL) {
+	if (!reply) {
 		rc = -EPROTO;
 		goto cleanup;
 	}
 
 	if (lvb_len != 0) {
-		LASSERT(lvb != NULL);
+		LASSERT(lvb);
 
 		size = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
 					    RCL_SERVER);
@@ -445,7 +445,7 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 
 			rc = ldlm_lock_change_resource(ns, lock,
 					&reply->lock_desc.l_resource.lr_name);
-			if (rc || lock->l_resource == NULL) {
+			if (rc || !lock->l_resource) {
 				rc = -ENOMEM;
 				goto cleanup;
 			}
@@ -495,7 +495,7 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 
 	if (!is_replay) {
 		rc = ldlm_lock_enqueue(ns, &lock, NULL, flags);
-		if (lock->l_completion_ast != NULL) {
+		if (lock->l_completion_ast) {
 			int err = lock->l_completion_ast(lock, *flags, NULL);
 
 			if (!rc)
@@ -505,7 +505,7 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 		}
 	}
 
-	if (lvb_len && lvb != NULL) {
+	if (lvb_len && lvb) {
 		/* Copy the LVB here, and not earlier, because the completion
 		 * AST (if any) can override what we got in the reply */
 		memcpy(lvb, lock->l_lvb_data, lvb_len);
@@ -579,7 +579,7 @@ int ldlm_prep_elc_req(struct obd_export *exp, struct ptlrpc_request *req,
 	LIST_HEAD(head);
 	int rc;
 
-	if (cancels == NULL)
+	if (!cancels)
 		cancels = &head;
 	if (ns_connect_cancelset(ns)) {
 		/* Estimate the amount of available space in the request. */
@@ -665,15 +665,13 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 	int		    rc, err;
 	struct ptlrpc_request *req;
 
-	LASSERT(exp != NULL);
-
 	ns = exp->exp_obd->obd_namespace;
 
 	/* If we're replaying this lock, just check some invariants.
 	 * If we're creating a new lock, get everything all setup nice. */
 	if (is_replay) {
 		lock = ldlm_handle2lock_long(lockh, 0);
-		LASSERT(lock != NULL);
+		LASSERT(lock);
 		LDLM_DEBUG(lock, "client-side enqueue START");
 		LASSERT(exp == lock->l_conn_export);
 	} else {
@@ -685,13 +683,13 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 		lock = ldlm_lock_create(ns, res_id, einfo->ei_type,
 					einfo->ei_mode, &cbs, einfo->ei_cbdata,
 					lvb_len, lvb_type);
-		if (lock == NULL)
+		if (!lock)
 			return -ENOMEM;
 		/* for the local lock, add the reference */
 		ldlm_lock_addref_internal(lock, einfo->ei_mode);
 		ldlm_lock2handle(lock, lockh);
-		if (policy != NULL)
-				lock->l_policy_data = *policy;
+		if (policy)
+			lock->l_policy_data = *policy;
 
 		if (einfo->ei_type == LDLM_EXTENT)
 			lock->l_req_extent = policy->l_extent;
@@ -706,12 +704,12 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 
 	/* lock not sent to server yet */
 
-	if (reqp == NULL || *reqp == NULL) {
+	if (!reqp || !*reqp) {
 		req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 						&RQF_LDLM_ENQUEUE,
 						LUSTRE_DLM_VERSION,
 						LDLM_ENQUEUE);
-		if (req == NULL) {
+		if (!req) {
 			failed_lock_cleanup(ns, lock, einfo->ei_mode);
 			LDLM_LOCK_RELEASE(lock);
 			return -ENOMEM;
@@ -754,7 +752,7 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 		     policy->l_extent.end == OBD_OBJECT_EOF));
 
 	if (async) {
-		LASSERT(reqp != NULL);
+		LASSERT(reqp);
 		return 0;
 	}
 
@@ -773,7 +771,7 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 	else
 		rc = err;
 
-	if (!req_passed_in && req != NULL) {
+	if (!req_passed_in && req) {
 		ptlrpc_req_finished(req);
 		if (reqp)
 			*reqp = NULL;
@@ -832,7 +830,7 @@ static void ldlm_cancel_pack(struct ptlrpc_request *req,
 	int max, packed = 0;
 
 	dlm = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
-	LASSERT(dlm != NULL);
+	LASSERT(dlm);
 
 	/* Check the room in the request buffer. */
 	max = req_capsule_get_size(&req->rq_pill, &RMF_DLM_REQ, RCL_CLIENT) -
@@ -868,7 +866,7 @@ static int ldlm_cli_cancel_req(struct obd_export *exp,
 	int free, sent = 0;
 	int rc = 0;
 
-	LASSERT(exp != NULL);
+	LASSERT(exp);
 	LASSERT(count > 0);
 
 	CFS_FAIL_TIMEOUT(OBD_FAIL_LDLM_PAUSE_CANCEL, cfs_fail_val);
@@ -883,14 +881,14 @@ static int ldlm_cli_cancel_req(struct obd_export *exp,
 
 	while (1) {
 		imp = class_exp2cliimp(exp);
-		if (imp == NULL || imp->imp_invalid) {
+		if (!imp || imp->imp_invalid) {
 			CDEBUG(D_DLMTRACE,
 			       "skipping cancel on invalid import %p\n", imp);
 			return count;
 		}
 
 		req = ptlrpc_request_alloc(imp, &RQF_LDLM_CANCEL);
-		if (req == NULL) {
+		if (!req) {
 			rc = -ENOMEM;
 			goto out;
 		}
@@ -946,7 +944,6 @@ out:
 
 static inline struct ldlm_pool *ldlm_imp2pl(struct obd_import *imp)
 {
-	LASSERT(imp != NULL);
 	return &imp->imp_obd->obd_namespace->ns_pool;
 }
 
@@ -1016,7 +1013,7 @@ int ldlm_cli_cancel(struct lustre_handle *lockh,
 
 	/* concurrent cancels on the same handle can happen */
 	lock = ldlm_handle2lock_long(lockh, LDLM_FL_CANCELING);
-	if (lock == NULL) {
+	if (!lock) {
 		LDLM_DEBUG_NOLOCK("lock is already being destroyed\n");
 		return 0;
 	}
@@ -1307,7 +1304,7 @@ static int ldlm_prepare_lru_list(struct ldlm_namespace *ns,
 		count += unused - ns->ns_max_unused;
 
 	pf = ldlm_cancel_lru_policy(ns, flags);
-	LASSERT(pf != NULL);
+	LASSERT(pf);
 
 	while (!list_empty(&ns->ns_unused_list)) {
 		ldlm_policy_res_t result;
@@ -1476,7 +1473,7 @@ int ldlm_cancel_resource_local(struct ldlm_resource *res,
 
 	lock_res(res);
 	list_for_each_entry(lock, &res->lr_granted, l_res_link) {
-		if (opaque != NULL && lock->l_ast_data != opaque) {
+		if (opaque && lock->l_ast_data != opaque) {
 			LDLM_ERROR(lock, "data %p doesn't match opaque %p",
 				   lock->l_ast_data, opaque);
 			continue;
@@ -1591,7 +1588,7 @@ int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
 	int rc;
 
 	res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
-	if (res == NULL) {
+	if (!res) {
 		/* This is not a problem. */
 		CDEBUG(D_INFO, "No resource %llu\n", res_id->name[0]);
 		return 0;
@@ -1645,10 +1642,10 @@ int ldlm_cli_cancel_unused(struct ldlm_namespace *ns,
 		.lc_opaque      = opaque,
 	};
 
-	if (ns == NULL)
+	if (!ns)
 		return ELDLM_OK;
 
-	if (res_id != NULL) {
+	if (res_id) {
 		return ldlm_cli_cancel_unused_resource(ns, res_id, NULL,
 						       LCK_MINMODE, flags,
 						       opaque);
@@ -1743,13 +1740,13 @@ int ldlm_resource_iterate(struct ldlm_namespace *ns,
 	struct ldlm_resource *res;
 	int rc;
 
-	if (ns == NULL) {
+	if (!ns) {
 		CERROR("must pass in namespace\n");
 		LBUG();
 	}
 
 	res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 
 	LDLM_RESOURCE_ADDREF(res);
@@ -1796,7 +1793,7 @@ static int replay_lock_interpret(const struct lu_env *env,
 		goto out;
 
 	reply = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	if (reply == NULL) {
+	if (!reply) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1882,7 +1879,7 @@ static int replay_one_lock(struct obd_import *imp, struct ldlm_lock *lock)
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LDLM_ENQUEUE,
 					LUSTRE_DLM_VERSION, LDLM_ENQUEUE);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	/* We're part of recovery, so don't wait for it. */
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
index 0ae6100..6ae8c60 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
@@ -380,7 +380,7 @@ static void ldlm_namespace_debugfs_unregister(struct ldlm_namespace *ns)
 	else
 		ldebugfs_remove(&ns->ns_debugfs_entry);
 
-	if (ns->ns_stats != NULL)
+	if (ns->ns_stats)
 		lprocfs_free_stats(&ns->ns_stats);
 }
 
@@ -400,7 +400,7 @@ static int ldlm_namespace_sysfs_register(struct ldlm_namespace *ns)
 				   "%s", ldlm_ns_name(ns));
 
 	ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
-	if (ns->ns_stats == NULL) {
+	if (!ns->ns_stats) {
 		kobject_put(&ns->ns_kobj);
 		return -ENOMEM;
 	}
@@ -420,7 +420,7 @@ static int ldlm_namespace_debugfs_register(struct ldlm_namespace *ns)
 	} else {
 		ns_entry = debugfs_create_dir(ldlm_ns_name(ns),
 					      ldlm_ns_debugfs_dir);
-		if (ns_entry == NULL)
+		if (!ns_entry)
 			return -ENOMEM;
 		ns->ns_debugfs_entry = ns_entry;
 	}
@@ -631,7 +631,7 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
 	int		    idx;
 	int		    rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 
 	rc = ldlm_get_ref();
 	if (rc) {
@@ -664,7 +664,7 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
 					 CFS_HASH_BIGNAME |
 					 CFS_HASH_SPIN_BKTLOCK |
 					 CFS_HASH_NO_ITEMREF);
-	if (ns->ns_rs_hash == NULL)
+	if (!ns->ns_rs_hash)
 		goto out_ns;
 
 	cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, idx) {
@@ -763,7 +763,7 @@ static void cleanup_resource(struct ldlm_resource *res, struct list_head *q,
 			break;
 		}
 
-		if (lock == NULL) {
+		if (!lock) {
 			unlock_res(res);
 			break;
 		}
@@ -837,7 +837,7 @@ static int ldlm_resource_complain(struct cfs_hash *hs, struct cfs_hash_bd *bd,
  */
 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, __u64 flags)
 {
-	if (ns == NULL) {
+	if (!ns) {
 		CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
 		return ELDLM_OK;
 	}
@@ -1032,7 +1032,7 @@ static struct ldlm_resource *ldlm_resource_new(void)
 	int idx;
 
 	res = kmem_cache_alloc(ldlm_resource_slab, GFP_NOFS | __GFP_ZERO);
-	if (res == NULL)
+	if (!res)
 		return NULL;
 
 	INIT_LIST_HEAD(&res->lr_granted);
@@ -1073,14 +1073,13 @@ ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 	__u64		 version;
 	int		      ns_refcount = 0;
 
-	LASSERT(ns != NULL);
-	LASSERT(parent == NULL);
-	LASSERT(ns->ns_rs_hash != NULL);
+	LASSERT(!parent);
+	LASSERT(ns->ns_rs_hash);
 	LASSERT(name->name[0] != 0);
 
 	cfs_hash_bd_get_and_lock(ns->ns_rs_hash, (void *)name, &bd, 0);
 	hnode = cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
-	if (hnode != NULL) {
+	if (hnode) {
 		cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
 		res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
 		/* Synchronize with regard to resource creation. */
@@ -1117,7 +1116,7 @@ ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 	hnode = (version == cfs_hash_bd_version_get(&bd)) ?  NULL :
 		cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
 
-	if (hnode != NULL) {
+	if (hnode) {
 		/* Someone won the race and already added the resource. */
 		cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
 		/* Clean lu_ref for failed resource. */
-- 
2.1.0

[lustre-devel] [PATCH 15/45] staging/lustre/ldlm: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/ldlm/interval_tree.c |  2 -
 drivers/staging/lustre/lustre/ldlm/ldlm_extent.c   |  9 ++-
 drivers/staging/lustre/lustre/ldlm/ldlm_flock.c    | 13 ++---
 drivers/staging/lustre/lustre/ldlm/ldlm_lib.c      | 16 +++---
 drivers/staging/lustre/lustre/ldlm/ldlm_lock.c     | 65 +++++++++++-----------
 drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c    | 45 ++++++++-------
 drivers/staging/lustre/lustre/ldlm/ldlm_pool.c     | 17 +++---
 drivers/staging/lustre/lustre/ldlm/ldlm_request.c  | 65 +++++++++++-----------
 drivers/staging/lustre/lustre/ldlm/ldlm_resource.c | 25 ++++-----
 9 files changed, 123 insertions(+), 134 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ldlm/interval_tree.c b/drivers/staging/lustre/lustre/ldlm/interval_tree.c
index a2ea8e5..fd70f65 100644
--- a/drivers/staging/lustre/lustre/ldlm/interval_tree.c
+++ b/drivers/staging/lustre/lustre/ldlm/interval_tree.c
@@ -49,13 +49,11 @@ enum {
 
 static inline int node_is_left_child(struct interval_node *node)
 {
-	LASSERT(node->in_parent != NULL);
 	return node == node->in_parent->in_left;
 }
 
 static inline int node_is_right_child(struct interval_node *node)
 {
-	LASSERT(node->in_parent != NULL);
 	return node == node->in_parent->in_right;
 }
 
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c b/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
index 9c70f31..aa92682 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_extent.c
@@ -113,7 +113,7 @@ struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock)
 
 	LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
 	node = kmem_cache_alloc(ldlm_interval_slab, GFP_NOFS | __GFP_ZERO);
-	if (node == NULL)
+	if (!node)
 		return NULL;
 
 	INIT_LIST_HEAD(&node->li_group);
@@ -134,7 +134,7 @@ struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l)
 {
 	struct ldlm_interval *n = l->l_tree_node;
 
-	if (n == NULL)
+	if (!n)
 		return NULL;
 
 	LASSERT(!list_empty(&n->li_group));
@@ -168,7 +168,7 @@ void ldlm_extent_add_lock(struct ldlm_resource *res,
 	LASSERT(lock->l_granted_mode == lock->l_req_mode);
 
 	node = lock->l_tree_node;
-	LASSERT(node != NULL);
+	LASSERT(node);
 	LASSERT(!interval_is_intree(&node->li_node));
 
 	idx = lock_mode_to_index(lock->l_granted_mode);
@@ -185,7 +185,6 @@ void ldlm_extent_add_lock(struct ldlm_resource *res,
 		struct ldlm_interval *tmp;
 
 		tmp = ldlm_interval_detach(lock);
-		LASSERT(tmp != NULL);
 		ldlm_interval_free(tmp);
 		ldlm_interval_attach(to_ldlm_interval(found), lock);
 	}
@@ -211,7 +210,7 @@ void ldlm_extent_unlink_lock(struct ldlm_lock *lock)
 	LASSERT(lock->l_granted_mode == 1 << idx);
 	tree = &res->lr_itree[idx];
 
-	LASSERT(tree->lit_root != NULL); /* assure the tree is not null */
+	LASSERT(tree->lit_root); /* assure the tree is not null */
 
 	tree->lit_size--;
 	node = ldlm_interval_detach(lock);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
index 4310154..7c671e3 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_flock.c
@@ -361,7 +361,7 @@ reprocess:
 		lock->l_policy_data.l_flock.start =
 			new->l_policy_data.l_flock.end + 1;
 		new2->l_conn_export = lock->l_conn_export;
-		if (lock->l_export != NULL) {
+		if (lock->l_export) {
 			new2->l_export = class_export_lock_get(lock->l_export,
 							       new2);
 			if (new2->l_export->exp_lock_hash &&
@@ -381,7 +381,7 @@ reprocess:
 	}
 
 	/* if new2 is created but never used, destroy it*/
-	if (splitted == 0 && new2 != NULL)
+	if (splitted == 0 && new2)
 		ldlm_lock_destroy_nolock(new2);
 
 	/* At this point we're granting the lock request. */
@@ -462,8 +462,7 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
 	if ((lock->l_flags & (LDLM_FL_FAILED|LDLM_FL_LOCAL_ONLY)) ==
 	    (LDLM_FL_FAILED|LDLM_FL_LOCAL_ONLY)) {
 		if (lock->l_req_mode == lock->l_granted_mode &&
-		    lock->l_granted_mode != LCK_NL &&
-		    data == NULL)
+		    lock->l_granted_mode != LCK_NL && !data)
 			ldlm_lock_decref_internal(lock, lock->l_req_mode);
 
 		/* Need to wake up the waiter if we were evicted */
@@ -475,7 +474,7 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
 
 	if (!(flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
 		       LDLM_FL_BLOCK_CONV))) {
-		if (data == NULL)
+		if (!data)
 			/* mds granted the lock in the reply */
 			goto granted;
 		/* CP AST RPC: lock get granted, wake it up */
@@ -488,10 +487,10 @@ ldlm_flock_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
 	obd = class_exp2obd(lock->l_conn_export);
 
 	/* if this is a local lock, there is no import */
-	if (obd != NULL)
+	if (obd)
 		imp = obd->u.cli.cl_import;
 
-	if (imp != NULL) {
+	if (imp) {
 		spin_lock(&imp->imp_lock);
 		fwd.fwd_generation = imp->imp_generation;
 		spin_unlock(&imp->imp_lock);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index 774d89c..0e25c45 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -373,7 +373,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 			   &obddev->obd_ldlm_client);
 
 	imp = class_new_import(obddev);
-	if (imp == NULL) {
+	if (!imp) {
 		rc = -ENOENT;
 		goto err_ldlm;
 	}
@@ -409,7 +409,7 @@ int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
 						   LDLM_NAMESPACE_CLIENT,
 						   LDLM_NAMESPACE_GREEDY,
 						   ns_type);
-	if (obddev->obd_namespace == NULL) {
+	if (!obddev->obd_namespace) {
 		CERROR("Unable to create client namespace - %s\n",
 		       obddev->obd_name);
 		rc = -ENOMEM;
@@ -435,7 +435,7 @@ int client_obd_cleanup(struct obd_device *obddev)
 	ldlm_namespace_free_post(obddev->obd_namespace);
 	obddev->obd_namespace = NULL;
 
-	LASSERT(obddev->u.cli.cl_import == NULL);
+	LASSERT(!obddev->u.cli.cl_import);
 
 	ldlm_put_ref();
 	return 0;
@@ -486,7 +486,7 @@ int client_connect_import(const struct lu_env *env,
 		LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
 		goto out_ldlm;
 	}
-	LASSERT(*exp != NULL && (*exp)->exp_connection);
+	LASSERT(*exp && (*exp)->exp_connection);
 
 	if (data) {
 		LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
@@ -555,7 +555,7 @@ int client_disconnect_export(struct obd_export *exp)
 	 * never added.) */
 	(void)ptlrpc_pinger_del_import(imp);
 
-	if (obd->obd_namespace != NULL) {
+	if (obd->obd_namespace) {
 		/* obd_force == local only */
 		ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
 				       obd->obd_force ? LCF_LOCAL : 0, NULL);
@@ -642,14 +642,14 @@ void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
 
 	svcpt = req->rq_rqbd->rqbd_svcpt;
 	rs = req->rq_reply_state;
-	if (rs == NULL || !rs->rs_difficult) {
+	if (!rs || !rs->rs_difficult) {
 		/* no notifiers */
 		target_send_reply_msg(req, rc, fail_id);
 		return;
 	}
 
 	/* must be an export if locks saved */
-	LASSERT(req->rq_export != NULL);
+	LASSERT(req->rq_export);
 	/* req/reply consistent */
 	LASSERT(rs->rs_svcpt == svcpt);
 
@@ -658,7 +658,7 @@ void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
 	LASSERT(!rs->rs_scheduled_ever);
 	LASSERT(!rs->rs_handled);
 	LASSERT(!rs->rs_on_net);
-	LASSERT(rs->rs_export == NULL);
+	LASSERT(!rs->rs_export);
 	LASSERT(list_empty(&rs->rs_obd_list));
 	LASSERT(list_empty(&rs->rs_exp_list));
 
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
index cf9ec0c..4fd735f 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
@@ -412,11 +412,10 @@ static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
 {
 	struct ldlm_lock *lock;
 
-	if (resource == NULL)
-		LBUG();
+	LASSERT(resource);
 
 	lock = kmem_cache_alloc(ldlm_lock_slab, GFP_NOFS | __GFP_ZERO);
-	if (lock == NULL)
+	if (!lock)
 		return NULL;
 
 	spin_lock_init(&lock->l_lock);
@@ -485,7 +484,7 @@ int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
 	unlock_res_and_lock(lock);
 
 	newres = ldlm_resource_get(ns, NULL, new_resid, type, 1);
-	if (newres == NULL)
+	if (!newres)
 		return -ENOMEM;
 
 	lu_ref_add(&newres->lr_reference, "lock", lock);
@@ -547,7 +546,7 @@ struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
 	LASSERT(handle);
 
 	lock = class_handle2object(handle->cookie);
-	if (lock == NULL)
+	if (!lock)
 		return NULL;
 
 	/* It's unlikely but possible that someone marked the lock as
@@ -559,7 +558,7 @@ struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
 
 	lock_res_and_lock(lock);
 
-	LASSERT(lock->l_resource != NULL);
+	LASSERT(lock->l_resource);
 
 	lu_ref_add_atomic(&lock->l_reference, "handle", current);
 	if (unlikely(lock->l_flags & LDLM_FL_DESTROYED)) {
@@ -617,7 +616,7 @@ static void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
 		LASSERT(list_empty(&lock->l_bl_ast));
 		list_add(&lock->l_bl_ast, work_list);
 		LDLM_LOCK_GET(lock);
-		LASSERT(lock->l_blocking_lock == NULL);
+		LASSERT(!lock->l_blocking_lock);
 		lock->l_blocking_lock = LDLM_LOCK_GET(new);
 	}
 }
@@ -664,7 +663,7 @@ void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
 	struct ldlm_lock *lock;
 
 	lock = ldlm_handle2lock(lockh);
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	ldlm_lock_addref_internal(lock, mode);
 	LDLM_LOCK_PUT(lock);
 }
@@ -708,7 +707,7 @@ int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
 
 	result = -EAGAIN;
 	lock = ldlm_handle2lock(lockh);
-	if (lock != NULL) {
+	if (lock) {
 		lock_res_and_lock(lock);
 		if (lock->l_readers != 0 || lock->l_writers != 0 ||
 		    !(lock->l_flags & LDLM_FL_CBPENDING)) {
@@ -835,7 +834,7 @@ void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
 {
 	struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
 
-	LASSERTF(lock != NULL, "Non-existing lock: %#llx\n", lockh->cookie);
+	LASSERTF(lock, "Non-existing lock: %#llx\n", lockh->cookie);
 	ldlm_lock_decref_internal(lock, mode);
 	LDLM_LOCK_PUT(lock);
 }
@@ -852,7 +851,7 @@ void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
 {
 	struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
 
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 
 	LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
 	lock_res_and_lock(lock);
@@ -1037,7 +1036,7 @@ void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
 	if (lock->l_granted_mode < res->lr_most_restr)
 		res->lr_most_restr = lock->l_granted_mode;
 
-	if (work_list && lock->l_completion_ast != NULL)
+	if (work_list && lock->l_completion_ast)
 		ldlm_add_ast_work_item(lock, NULL, work_list);
 
 	ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
@@ -1201,7 +1200,7 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 	struct ldlm_lock *lock, *old_lock = NULL;
 	int rc = 0;
 
-	if (ns == NULL) {
+	if (!ns) {
 		old_lock = ldlm_handle2lock(lockh);
 		LASSERT(old_lock);
 
@@ -1212,8 +1211,8 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 	}
 
 	res = ldlm_resource_get(ns, NULL, res_id, type, 0);
-	if (res == NULL) {
-		LASSERT(old_lock == NULL);
+	if (!res) {
+		LASSERT(!old_lock);
 		return 0;
 	}
 
@@ -1222,7 +1221,7 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 
 	lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
 			    flags, unref);
-	if (lock != NULL) {
+	if (lock) {
 		rc = 1;
 		goto out;
 	}
@@ -1232,7 +1231,7 @@ ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
 	}
 	lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
 			    flags, unref);
-	if (lock != NULL) {
+	if (lock) {
 		rc = 1;
 		goto out;
 	}
@@ -1324,7 +1323,7 @@ ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
 	ldlm_mode_t mode = 0;
 
 	lock = ldlm_handle2lock(lockh);
-	if (lock != NULL) {
+	if (lock) {
 		lock_res_and_lock(lock);
 		if (lock->l_flags & LDLM_FL_GONE_MASK)
 			goto out;
@@ -1340,7 +1339,7 @@ ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
 	}
 
 out:
-	if (lock != NULL) {
+	if (lock) {
 		unlock_res_and_lock(lock);
 		LDLM_LOCK_PUT(lock);
 	}
@@ -1354,7 +1353,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 {
 	void *lvb;
 
-	LASSERT(data != NULL);
+	LASSERT(data);
 	LASSERT(size >= 0);
 
 	switch (lock->l_lvb_type) {
@@ -1368,7 +1367,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 				lvb = req_capsule_server_swab_get(pill,
 						&RMF_DLM_LVB,
 						lustre_swab_ost_lvb);
-			if (unlikely(lvb == NULL)) {
+			if (unlikely(!lvb)) {
 				LDLM_ERROR(lock, "no LVB");
 				return -EPROTO;
 			}
@@ -1385,7 +1384,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 				lvb = req_capsule_server_sized_swab_get(pill,
 						&RMF_DLM_LVB, size,
 						lustre_swab_ost_lvb_v1);
-			if (unlikely(lvb == NULL)) {
+			if (unlikely(!lvb)) {
 				LDLM_ERROR(lock, "no LVB");
 				return -EPROTO;
 			}
@@ -1410,7 +1409,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 				lvb = req_capsule_server_swab_get(pill,
 						&RMF_DLM_LVB,
 						lustre_swab_lquota_lvb);
-			if (unlikely(lvb == NULL)) {
+			if (unlikely(!lvb)) {
 				LDLM_ERROR(lock, "no LVB");
 				return -EPROTO;
 			}
@@ -1431,7 +1430,7 @@ int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
 			lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
 		else
 			lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
-		if (unlikely(lvb == NULL)) {
+		if (unlikely(!lvb)) {
 			LDLM_ERROR(lock, "no LVB");
 			return -EPROTO;
 		}
@@ -1463,12 +1462,12 @@ struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
 	struct ldlm_resource *res;
 
 	res = ldlm_resource_get(ns, NULL, res_id, type, 1);
-	if (res == NULL)
+	if (!res)
 		return NULL;
 
 	lock = ldlm_lock_new(res);
 
-	if (lock == NULL)
+	if (!lock)
 		return NULL;
 
 	lock->l_req_mode = mode;
@@ -1483,7 +1482,7 @@ struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
 	lock->l_tree_node = NULL;
 	/* if this is the extent lock, allocate the interval tree node */
 	if (type == LDLM_EXTENT) {
-		if (ldlm_interval_alloc(lock) == NULL)
+		if (!ldlm_interval_alloc(lock))
 			goto out;
 	}
 
@@ -1633,7 +1632,7 @@ ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
 	lock->l_flags &= ~LDLM_FL_CP_REQD;
 	unlock_res_and_lock(lock);
 
-	if (completion_callback != NULL)
+	if (completion_callback)
 		rc = completion_callback(lock, 0, (void *)arg);
 	LDLM_LOCK_RELEASE(lock);
 
@@ -1752,7 +1751,7 @@ int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
 	 * to keep the number of requests in flight to ns_max_parallel_ast */
 	arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
 				     work_ast_lock, arg);
-	if (arg->set == NULL) {
+	if (!arg->set) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1846,7 +1845,7 @@ int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
 	int rc = -EINVAL;
 
 	if (lock) {
-		if (lock->l_ast_data == NULL)
+		if (!lock->l_ast_data)
 			lock->l_ast_data = data;
 		if (lock->l_ast_data == data)
 			rc = 0;
@@ -1874,7 +1873,7 @@ void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
 		return;
 
 	lock = ldlm_handle2lock(lockh);
-	if (lock == NULL)
+	if (!lock)
 		return;
 
 	LDLM_DEBUG_LIMIT(level, lock, "###");
@@ -1900,13 +1899,13 @@ void _ldlm_lock_debug(struct ldlm_lock *lock,
 
 	if (exp && exp->exp_connection) {
 		nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
-	} else if (exp && exp->exp_obd != NULL) {
+	} else if (exp && exp->exp_obd) {
 		struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 
 		nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
 	}
 
-	if (resource == NULL) {
+	if (!resource) {
 		libcfs_debug_vmsg2(msgdata, fmt, args,
 				   " ns: \?\? lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: \?\? rrc=\?\? type: \?\?\? flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
 				   lock,
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c
index 79aeb2b..0737ded 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lockd.c
@@ -136,7 +136,7 @@ void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
 		CDEBUG(D_DLMTRACE,
 		       "Lock %p already unused, calling callback (%p)\n", lock,
 		       lock->l_blocking_ast);
-		if (lock->l_blocking_ast != NULL)
+		if (lock->l_blocking_ast)
 			lock->l_blocking_ast(lock, ld, lock->l_ast_data,
 					     LDLM_CB_BLOCKING);
 	} else {
@@ -185,7 +185,7 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
 	} else if (lvb_len > 0) {
 		if (lock->l_lvb_len > 0) {
 			/* for extent lock, lvb contains ost_lvb{}. */
-			LASSERT(lock->l_lvb_data != NULL);
+			LASSERT(lock->l_lvb_data);
 
 			if (unlikely(lock->l_lvb_len < lvb_len)) {
 				LDLM_ERROR(lock, "Replied LVB is larger than expectation, expected = %d, replied = %d",
@@ -205,7 +205,7 @@ static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
 			}
 
 			lock_res_and_lock(lock);
-			LASSERT(lock->l_lvb_data == NULL);
+			LASSERT(!lock->l_lvb_data);
 			lock->l_lvb_type = LVB_T_LAYOUT;
 			lock->l_lvb_data = lvb_data;
 			lock->l_lvb_len = lvb_len;
@@ -312,10 +312,10 @@ static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
 
 	LDLM_DEBUG(lock, "client glimpse AST callback handler");
 
-	if (lock->l_glimpse_ast != NULL)
+	if (lock->l_glimpse_ast)
 		rc = lock->l_glimpse_ast(lock, req);
 
-	if (req->rq_repmsg != NULL) {
+	if (req->rq_repmsg) {
 		ptlrpc_reply(req);
 	} else {
 		req->rq_status = rc;
@@ -393,7 +393,7 @@ static inline void init_blwi(struct ldlm_bl_work_item *blwi,
 
 	blwi->blwi_ns = ns;
 	blwi->blwi_flags = cancel_flags;
-	if (ld != NULL)
+	if (ld)
 		blwi->blwi_ld = *ld;
 	if (count) {
 		list_add(&blwi->blwi_head, cancels);
@@ -470,14 +470,14 @@ static int ldlm_handle_setinfo(struct ptlrpc_request *req)
 	req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
 
 	key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
-	if (key == NULL) {
+	if (!key) {
 		DEBUG_REQ(D_IOCTL, req, "no set_info key");
 		return -EFAULT;
 	}
 	keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
 				      RCL_CLIENT);
 	val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
-	if (val == NULL) {
+	if (!val) {
 		DEBUG_REQ(D_IOCTL, req, "no set_info val");
 		return -EFAULT;
 	}
@@ -519,7 +519,7 @@ static int ldlm_handle_qc_callback(struct ptlrpc_request *req)
 	struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
 
 	oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
-	if (oqctl == NULL) {
+	if (!oqctl) {
 		CERROR("Can't unpack obd_quotactl\n");
 		return -EPROTO;
 	}
@@ -549,15 +549,14 @@ static int ldlm_callback_handler(struct ptlrpc_request *req)
 
 	req_capsule_init(&req->rq_pill, req, RCL_SERVER);
 
-	if (req->rq_export == NULL) {
+	if (!req->rq_export) {
 		rc = ldlm_callback_reply(req, -ENOTCONN);
 		ldlm_callback_errmsg(req, "Operate on unconnected server",
 				     rc, NULL);
 		return 0;
 	}
 
-	LASSERT(req->rq_export != NULL);
-	LASSERT(req->rq_export->exp_obd != NULL);
+	LASSERT(req->rq_export->exp_obd);
 
 	switch (lustre_msg_get_opc(req->rq_reqmsg)) {
 	case LDLM_BL_CALLBACK:
@@ -591,12 +590,12 @@ static int ldlm_callback_handler(struct ptlrpc_request *req)
 	}
 
 	ns = req->rq_export->exp_obd->obd_namespace;
-	LASSERT(ns != NULL);
+	LASSERT(ns);
 
 	req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
 
 	dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
-	if (dlm_req == NULL) {
+	if (!dlm_req) {
 		rc = ldlm_callback_reply(req, -EPROTO);
 		ldlm_callback_errmsg(req, "Operate without parameter", rc,
 				     NULL);
@@ -781,17 +780,17 @@ static int ldlm_bl_thread_main(void *arg)
 
 		blwi = ldlm_bl_get_work(blp);
 
-		if (blwi == NULL) {
+		if (!blwi) {
 			atomic_dec(&blp->blp_busy_threads);
 			l_wait_event_exclusive(blp->blp_waitq,
-					 (blwi = ldlm_bl_get_work(blp)) != NULL,
+					 (blwi = ldlm_bl_get_work(blp)),
 					 &lwi);
 			busy = atomic_inc_return(&blp->blp_busy_threads);
 		} else {
 			busy = atomic_read(&blp->blp_busy_threads);
 		}
 
-		if (blwi->blwi_ns == NULL)
+		if (!blwi->blwi_ns)
 			/* added by ldlm_cleanup() */
 			break;
 
@@ -915,7 +914,7 @@ static int ldlm_setup(void)
 	int rc = 0;
 	int i;
 
-	if (ldlm_state != NULL)
+	if (ldlm_state)
 		return -EALREADY;
 
 	ldlm_state = kzalloc(sizeof(*ldlm_state), GFP_NOFS);
@@ -1040,7 +1039,7 @@ static int ldlm_cleanup(void)
 
 	ldlm_pools_fini();
 
-	if (ldlm_state->ldlm_bl_pool != NULL) {
+	if (ldlm_state->ldlm_bl_pool) {
 		struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
 
 		while (atomic_read(&blp->blp_num_threads) > 0) {
@@ -1059,7 +1058,7 @@ static int ldlm_cleanup(void)
 		kfree(blp);
 	}
 
-	if (ldlm_state->ldlm_cb_service != NULL)
+	if (ldlm_state->ldlm_cb_service)
 		ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
 
 	if (ldlm_ns_kset)
@@ -1085,13 +1084,13 @@ int ldlm_init(void)
 	ldlm_resource_slab = kmem_cache_create("ldlm_resources",
 					       sizeof(struct ldlm_resource), 0,
 					       SLAB_HWCACHE_ALIGN, NULL);
-	if (ldlm_resource_slab == NULL)
+	if (!ldlm_resource_slab)
 		return -ENOMEM;
 
 	ldlm_lock_slab = kmem_cache_create("ldlm_locks",
 			      sizeof(struct ldlm_lock), 0,
 			      SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU, NULL);
-	if (ldlm_lock_slab == NULL) {
+	if (!ldlm_lock_slab) {
 		kmem_cache_destroy(ldlm_resource_slab);
 		return -ENOMEM;
 	}
@@ -1099,7 +1098,7 @@ int ldlm_init(void)
 	ldlm_interval_slab = kmem_cache_create("interval_node",
 					sizeof(struct ldlm_interval),
 					0, SLAB_HWCACHE_ALIGN, NULL);
-	if (ldlm_interval_slab == NULL) {
+	if (!ldlm_interval_slab) {
 		kmem_cache_destroy(ldlm_resource_slab);
 		kmem_cache_destroy(ldlm_lock_slab);
 		return -ENOMEM;
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
index 3d7c137..3e937b0 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
@@ -246,7 +246,6 @@ static void ldlm_cli_pool_pop_slv(struct ldlm_pool *pl)
 	 */
 	obd = container_of(pl, struct ldlm_namespace,
 			   ns_pool)->ns_obd;
-	LASSERT(obd != NULL);
 	read_lock(&obd->obd_pool_lock);
 	pl->pl_server_lock_volume = obd->obd_pool_slv;
 	atomic_set(&pl->pl_limit, obd->obd_pool_limit);
@@ -381,7 +380,7 @@ static int ldlm_pool_recalc(struct ldlm_pool *pl)
 	spin_unlock(&pl->pl_lock);
 
  recalc:
-	if (pl->pl_ops->po_recalc != NULL) {
+	if (pl->pl_ops->po_recalc) {
 		count = pl->pl_ops->po_recalc(pl);
 		lprocfs_counter_add(pl->pl_stats, LDLM_POOL_RECALC_STAT,
 				    count);
@@ -409,7 +408,7 @@ static int ldlm_pool_shrink(struct ldlm_pool *pl, int nr, gfp_t gfp_mask)
 {
 	int cancel = 0;
 
-	if (pl->pl_ops->po_shrink != NULL) {
+	if (pl->pl_ops->po_shrink) {
 		cancel = pl->pl_ops->po_shrink(pl, nr, gfp_mask);
 		if (nr > 0) {
 			lprocfs_counter_add(pl->pl_stats,
@@ -643,11 +642,11 @@ static void ldlm_pool_sysfs_fini(struct ldlm_pool *pl)
 
 static void ldlm_pool_debugfs_fini(struct ldlm_pool *pl)
 {
-	if (pl->pl_stats != NULL) {
+	if (pl->pl_stats) {
 		lprocfs_free_stats(&pl->pl_stats);
 		pl->pl_stats = NULL;
 	}
-	if (pl->pl_debugfs_entry != NULL) {
+	if (pl->pl_debugfs_entry) {
 		ldebugfs_remove(&pl->pl_debugfs_entry);
 		pl->pl_debugfs_entry = NULL;
 	}
@@ -834,7 +833,7 @@ static unsigned long ldlm_pools_count(ldlm_side_t client, gfp_t gfp_mask)
 			continue;
 		}
 
-		if (ns_old == NULL)
+		if (!ns_old)
 			ns_old = ns;
 
 		ldlm_namespace_get(ns);
@@ -957,7 +956,7 @@ static int ldlm_pools_recalc(ldlm_side_t client)
 			continue;
 		}
 
-		if (ns_old == NULL)
+		if (!ns_old)
 			ns_old = ns;
 
 		spin_lock(&ns->ns_lock);
@@ -1040,7 +1039,7 @@ static int ldlm_pools_thread_start(void)
 	struct l_wait_info lwi = { 0 };
 	struct task_struct *task;
 
-	if (ldlm_pools_thread != NULL)
+	if (ldlm_pools_thread)
 		return -EALREADY;
 
 	ldlm_pools_thread = kzalloc(sizeof(*ldlm_pools_thread), GFP_NOFS);
@@ -1065,7 +1064,7 @@ static int ldlm_pools_thread_start(void)
 
 static void ldlm_pools_thread_stop(void)
 {
-	if (ldlm_pools_thread == NULL)
+	if (!ldlm_pools_thread)
 		return;
 
 	thread_set_flags(ldlm_pools_thread, SVC_STOPPING);
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_request.c b/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
index b9eb377..de276af 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_request.c
@@ -94,7 +94,7 @@ static int ldlm_expired_completion_wait(void *data)
 	struct obd_import *imp;
 	struct obd_device *obd;
 
-	if (lock->l_conn_export == NULL) {
+	if (!lock->l_conn_export) {
 		static unsigned long next_dump, last_dump;
 
 		LCONSOLE_WARN("lock timed out (enqueued at %lld, %llds ago)\n",
@@ -239,7 +239,7 @@ noreproc:
 	obd = class_exp2obd(lock->l_conn_export);
 
 	/* if this is a local lock, then there is no import */
-	if (obd != NULL)
+	if (obd)
 		imp = obd->u.cli.cl_import;
 
 	/* Wait a long time for enqueue - server may have to callback a
@@ -258,7 +258,7 @@ noreproc:
 				       interrupted_completion_wait, &lwd);
 	}
 
-	if (imp != NULL) {
+	if (imp) {
 		spin_lock(&imp->imp_lock);
 		lwd.lwd_conn_cnt = imp->imp_conn_cnt;
 		spin_unlock(&imp->imp_lock);
@@ -363,13 +363,13 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 
 	/* Before we return, swab the reply */
 	reply = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	if (reply == NULL) {
+	if (!reply) {
 		rc = -EPROTO;
 		goto cleanup;
 	}
 
 	if (lvb_len != 0) {
-		LASSERT(lvb != NULL);
+		LASSERT(lvb);
 
 		size = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
 					    RCL_SERVER);
@@ -445,7 +445,7 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 
 			rc = ldlm_lock_change_resource(ns, lock,
 					&reply->lock_desc.l_resource.lr_name);
-			if (rc || lock->l_resource == NULL) {
+			if (rc || !lock->l_resource) {
 				rc = -ENOMEM;
 				goto cleanup;
 			}
@@ -495,7 +495,7 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 
 	if (!is_replay) {
 		rc = ldlm_lock_enqueue(ns, &lock, NULL, flags);
-		if (lock->l_completion_ast != NULL) {
+		if (lock->l_completion_ast) {
 			int err = lock->l_completion_ast(lock, *flags, NULL);
 
 			if (!rc)
@@ -505,7 +505,7 @@ int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
 		}
 	}
 
-	if (lvb_len && lvb != NULL) {
+	if (lvb_len && lvb) {
 		/* Copy the LVB here, and not earlier, because the completion
 		 * AST (if any) can override what we got in the reply */
 		memcpy(lvb, lock->l_lvb_data, lvb_len);
@@ -579,7 +579,7 @@ int ldlm_prep_elc_req(struct obd_export *exp, struct ptlrpc_request *req,
 	LIST_HEAD(head);
 	int rc;
 
-	if (cancels == NULL)
+	if (!cancels)
 		cancels = &head;
 	if (ns_connect_cancelset(ns)) {
 		/* Estimate the amount of available space in the request. */
@@ -665,15 +665,13 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 	int		    rc, err;
 	struct ptlrpc_request *req;
 
-	LASSERT(exp != NULL);
-
 	ns = exp->exp_obd->obd_namespace;
 
 	/* If we're replaying this lock, just check some invariants.
 	 * If we're creating a new lock, get everything all setup nice. */
 	if (is_replay) {
 		lock = ldlm_handle2lock_long(lockh, 0);
-		LASSERT(lock != NULL);
+		LASSERT(lock);
 		LDLM_DEBUG(lock, "client-side enqueue START");
 		LASSERT(exp == lock->l_conn_export);
 	} else {
@@ -685,13 +683,13 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 		lock = ldlm_lock_create(ns, res_id, einfo->ei_type,
 					einfo->ei_mode, &cbs, einfo->ei_cbdata,
 					lvb_len, lvb_type);
-		if (lock == NULL)
+		if (!lock)
 			return -ENOMEM;
 		/* for the local lock, add the reference */
 		ldlm_lock_addref_internal(lock, einfo->ei_mode);
 		ldlm_lock2handle(lock, lockh);
-		if (policy != NULL)
-				lock->l_policy_data = *policy;
+		if (policy)
+			lock->l_policy_data = *policy;
 
 		if (einfo->ei_type == LDLM_EXTENT)
 			lock->l_req_extent = policy->l_extent;
@@ -706,12 +704,12 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 
 	/* lock not sent to server yet */
 
-	if (reqp == NULL || *reqp == NULL) {
+	if (!reqp || !*reqp) {
 		req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 						&RQF_LDLM_ENQUEUE,
 						LUSTRE_DLM_VERSION,
 						LDLM_ENQUEUE);
-		if (req == NULL) {
+		if (!req) {
 			failed_lock_cleanup(ns, lock, einfo->ei_mode);
 			LDLM_LOCK_RELEASE(lock);
 			return -ENOMEM;
@@ -754,7 +752,7 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 		     policy->l_extent.end == OBD_OBJECT_EOF));
 
 	if (async) {
-		LASSERT(reqp != NULL);
+		LASSERT(reqp);
 		return 0;
 	}
 
@@ -773,7 +771,7 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 	else
 		rc = err;
 
-	if (!req_passed_in && req != NULL) {
+	if (!req_passed_in && req) {
 		ptlrpc_req_finished(req);
 		if (reqp)
 			*reqp = NULL;
@@ -832,7 +830,7 @@ static void ldlm_cancel_pack(struct ptlrpc_request *req,
 	int max, packed = 0;
 
 	dlm = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
-	LASSERT(dlm != NULL);
+	LASSERT(dlm);
 
 	/* Check the room in the request buffer. */
 	max = req_capsule_get_size(&req->rq_pill, &RMF_DLM_REQ, RCL_CLIENT) -
@@ -868,7 +866,7 @@ static int ldlm_cli_cancel_req(struct obd_export *exp,
 	int free, sent = 0;
 	int rc = 0;
 
-	LASSERT(exp != NULL);
+	LASSERT(exp);
 	LASSERT(count > 0);
 
 	CFS_FAIL_TIMEOUT(OBD_FAIL_LDLM_PAUSE_CANCEL, cfs_fail_val);
@@ -883,14 +881,14 @@ static int ldlm_cli_cancel_req(struct obd_export *exp,
 
 	while (1) {
 		imp = class_exp2cliimp(exp);
-		if (imp == NULL || imp->imp_invalid) {
+		if (!imp || imp->imp_invalid) {
 			CDEBUG(D_DLMTRACE,
 			       "skipping cancel on invalid import %p\n", imp);
 			return count;
 		}
 
 		req = ptlrpc_request_alloc(imp, &RQF_LDLM_CANCEL);
-		if (req == NULL) {
+		if (!req) {
 			rc = -ENOMEM;
 			goto out;
 		}
@@ -946,7 +944,6 @@ out:
 
 static inline struct ldlm_pool *ldlm_imp2pl(struct obd_import *imp)
 {
-	LASSERT(imp != NULL);
 	return &imp->imp_obd->obd_namespace->ns_pool;
 }
 
@@ -1016,7 +1013,7 @@ int ldlm_cli_cancel(struct lustre_handle *lockh,
 
 	/* concurrent cancels on the same handle can happen */
 	lock = ldlm_handle2lock_long(lockh, LDLM_FL_CANCELING);
-	if (lock == NULL) {
+	if (!lock) {
 		LDLM_DEBUG_NOLOCK("lock is already being destroyed\n");
 		return 0;
 	}
@@ -1307,7 +1304,7 @@ static int ldlm_prepare_lru_list(struct ldlm_namespace *ns,
 		count += unused - ns->ns_max_unused;
 
 	pf = ldlm_cancel_lru_policy(ns, flags);
-	LASSERT(pf != NULL);
+	LASSERT(pf);
 
 	while (!list_empty(&ns->ns_unused_list)) {
 		ldlm_policy_res_t result;
@@ -1476,7 +1473,7 @@ int ldlm_cancel_resource_local(struct ldlm_resource *res,
 
 	lock_res(res);
 	list_for_each_entry(lock, &res->lr_granted, l_res_link) {
-		if (opaque != NULL && lock->l_ast_data != opaque) {
+		if (opaque && lock->l_ast_data != opaque) {
 			LDLM_ERROR(lock, "data %p doesn't match opaque %p",
 				   lock->l_ast_data, opaque);
 			continue;
@@ -1591,7 +1588,7 @@ int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
 	int rc;
 
 	res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
-	if (res == NULL) {
+	if (!res) {
 		/* This is not a problem. */
 		CDEBUG(D_INFO, "No resource %llu\n", res_id->name[0]);
 		return 0;
@@ -1645,10 +1642,10 @@ int ldlm_cli_cancel_unused(struct ldlm_namespace *ns,
 		.lc_opaque      = opaque,
 	};
 
-	if (ns == NULL)
+	if (!ns)
 		return ELDLM_OK;
 
-	if (res_id != NULL) {
+	if (res_id) {
 		return ldlm_cli_cancel_unused_resource(ns, res_id, NULL,
 						       LCK_MINMODE, flags,
 						       opaque);
@@ -1743,13 +1740,13 @@ int ldlm_resource_iterate(struct ldlm_namespace *ns,
 	struct ldlm_resource *res;
 	int rc;
 
-	if (ns == NULL) {
+	if (!ns) {
 		CERROR("must pass in namespace\n");
 		LBUG();
 	}
 
 	res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 
 	LDLM_RESOURCE_ADDREF(res);
@@ -1796,7 +1793,7 @@ static int replay_lock_interpret(const struct lu_env *env,
 		goto out;
 
 	reply = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	if (reply == NULL) {
+	if (!reply) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1882,7 +1879,7 @@ static int replay_one_lock(struct obd_import *imp, struct ldlm_lock *lock)
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LDLM_ENQUEUE,
 					LUSTRE_DLM_VERSION, LDLM_ENQUEUE);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	/* We're part of recovery, so don't wait for it. */
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
index 0ae6100..6ae8c60 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
@@ -380,7 +380,7 @@ static void ldlm_namespace_debugfs_unregister(struct ldlm_namespace *ns)
 	else
 		ldebugfs_remove(&ns->ns_debugfs_entry);
 
-	if (ns->ns_stats != NULL)
+	if (ns->ns_stats)
 		lprocfs_free_stats(&ns->ns_stats);
 }
 
@@ -400,7 +400,7 @@ static int ldlm_namespace_sysfs_register(struct ldlm_namespace *ns)
 				   "%s", ldlm_ns_name(ns));
 
 	ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
-	if (ns->ns_stats == NULL) {
+	if (!ns->ns_stats) {
 		kobject_put(&ns->ns_kobj);
 		return -ENOMEM;
 	}
@@ -420,7 +420,7 @@ static int ldlm_namespace_debugfs_register(struct ldlm_namespace *ns)
 	} else {
 		ns_entry = debugfs_create_dir(ldlm_ns_name(ns),
 					      ldlm_ns_debugfs_dir);
-		if (ns_entry == NULL)
+		if (!ns_entry)
 			return -ENOMEM;
 		ns->ns_debugfs_entry = ns_entry;
 	}
@@ -631,7 +631,7 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
 	int		    idx;
 	int		    rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 
 	rc = ldlm_get_ref();
 	if (rc) {
@@ -664,7 +664,7 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
 					 CFS_HASH_BIGNAME |
 					 CFS_HASH_SPIN_BKTLOCK |
 					 CFS_HASH_NO_ITEMREF);
-	if (ns->ns_rs_hash == NULL)
+	if (!ns->ns_rs_hash)
 		goto out_ns;
 
 	cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, idx) {
@@ -763,7 +763,7 @@ static void cleanup_resource(struct ldlm_resource *res, struct list_head *q,
 			break;
 		}
 
-		if (lock == NULL) {
+		if (!lock) {
 			unlock_res(res);
 			break;
 		}
@@ -837,7 +837,7 @@ static int ldlm_resource_complain(struct cfs_hash *hs, struct cfs_hash_bd *bd,
  */
 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, __u64 flags)
 {
-	if (ns == NULL) {
+	if (!ns) {
 		CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
 		return ELDLM_OK;
 	}
@@ -1032,7 +1032,7 @@ static struct ldlm_resource *ldlm_resource_new(void)
 	int idx;
 
 	res = kmem_cache_alloc(ldlm_resource_slab, GFP_NOFS | __GFP_ZERO);
-	if (res == NULL)
+	if (!res)
 		return NULL;
 
 	INIT_LIST_HEAD(&res->lr_granted);
@@ -1073,14 +1073,13 @@ ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 	__u64		 version;
 	int		      ns_refcount = 0;
 
-	LASSERT(ns != NULL);
-	LASSERT(parent == NULL);
-	LASSERT(ns->ns_rs_hash != NULL);
+	LASSERT(!parent);
+	LASSERT(ns->ns_rs_hash);
 	LASSERT(name->name[0] != 0);
 
 	cfs_hash_bd_get_and_lock(ns->ns_rs_hash, (void *)name, &bd, 0);
 	hnode = cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
-	if (hnode != NULL) {
+	if (hnode) {
 		cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
 		res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
 		/* Synchronize with regard to resource creation. */
@@ -1117,7 +1116,7 @@ ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 	hnode = (version == cfs_hash_bd_version_get(&bd)) ?  NULL :
 		cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
 
-	if (hnode != NULL) {
+	if (hnode) {
 		/* Someone won the race and already added the resource. */
 		cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
 		/* Clean lu_ref for failed resource. */
-- 
2.1.0

[PATCH 16/45] staging/lustre/lmv: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lmv/lmv_intent.c   |  11 +--
 drivers/staging/lustre/lustre/lmv/lmv_internal.h |   6 +-
 drivers/staging/lustre/lustre/lmv/lmv_obd.c      | 115 ++++++++++-------------
 drivers/staging/lustre/lustre/lmv/lproc_lmv.c    |   4 +-
 4 files changed, 61 insertions(+), 75 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lmv/lmv_intent.c b/drivers/staging/lustre/lustre/lmv/lmv_intent.c
index 66de27f..cb1ed42 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_intent.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_intent.c
@@ -69,7 +69,7 @@ static int lmv_intent_remote(struct obd_export *exp, void *lmm,
 	int			rc = 0;
 
 	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 
 	LASSERT((body->valid & OBD_MD_MDS));
@@ -107,7 +107,7 @@ static int lmv_intent_remote(struct obd_export *exp, void *lmm,
 
 	op_data->op_fid1 = body->fid1;
 	/* Sent the parent FID to the remote MDT */
-	if (parent_fid != NULL) {
+	if (parent_fid) {
 		/* The parent fid is only for remote open to
 		 * check whether the open is from OBF,
 		 * see mdt_cross_open */
@@ -204,7 +204,7 @@ static int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
 		return rc;
 
 	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 	/*
 	 * Not cross-ref case, just get out of here.
@@ -270,7 +270,7 @@ static int lmv_intent_lookup(struct obd_export *exp,
 	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
 			     flags, reqp, cb_blocking, extra_lock_flags);
 
-	if (rc < 0 || *reqp == NULL)
+	if (rc < 0 || !*reqp)
 		return rc;
 
 	/*
@@ -278,7 +278,7 @@ static int lmv_intent_lookup(struct obd_export *exp,
 	 * remote inode. Let's check this.
 	 */
 	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 	/* Not cross-ref case, just get out of here. */
 	if (likely(!(body->valid & OBD_MD_MDS)))
@@ -299,7 +299,6 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
 	struct obd_device *obd = exp->exp_obd;
 	int		rc;
 
-	LASSERT(it != NULL);
 	LASSERT(fid_is_sane(&op_data->op_fid1));
 
 	CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_internal.h b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
index eb8e673..041d30f33 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_internal.h
+++ b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
@@ -66,7 +66,7 @@ static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
 	struct mdt_body	 *body;
 	struct lmv_stripe_md    *mea;
 
-	LASSERT(req != NULL);
+	LASSERT(req);
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 
@@ -75,8 +75,6 @@ static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
 
 	mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
 					   body->eadatasize);
-	LASSERT(mea != NULL);
-
 	if (mea->mea_count == 0)
 		return NULL;
 	if (mea->mea_magic != MEA_MAGIC_LAST_CHAR &&
@@ -101,7 +99,7 @@ lmv_get_target(struct lmv_obd *lmv, u32 mds)
 	int i;
 
 	for (i = 0; i < count; i++) {
-		if (lmv->tgts[i] == NULL)
+		if (!lmv->tgts[i])
 			continue;
 
 		if (lmv->tgts[i]->ltd_idx == mds)
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index 733222c..2df369a 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -88,7 +88,7 @@ static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
 	spin_lock(&lmv->lmv_lock);
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 		tgt = lmv->tgts[i];
-		if (tgt == NULL || tgt->ltd_exp == NULL)
+		if (!tgt || !tgt->ltd_exp)
 			continue;
 
 		CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n", i,
@@ -104,7 +104,7 @@ static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
 	}
 
 	obd = class_exp2obd(tgt->ltd_exp);
-	if (obd == NULL) {
+	if (!obd) {
 		rc = -ENOTCONN;
 		goto out_lmv_lock;
 	}
@@ -262,7 +262,7 @@ static void lmv_set_timeouts(struct obd_device *obd)
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 		tgt = lmv->tgts[i];
-		if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
+		if (!tgt || !tgt->ltd_exp || tgt->ltd_active == 0)
 			continue;
 
 		obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
@@ -302,8 +302,7 @@ static int lmv_init_ea_size(struct obd_export *exp, int easize,
 		return 0;
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL ||
-		    lmv->tgts[i]->ltd_exp == NULL ||
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp ||
 		    lmv->tgts[i]->ltd_active == 0) {
 			CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 			continue;
@@ -410,7 +409,7 @@ static int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 
 static void lmv_del_target(struct lmv_obd *lmv, int index)
 {
-	if (lmv->tgts[index] == NULL)
+	if (!lmv->tgts[index])
 		return;
 
 	kfree(lmv->tgts[index]);
@@ -442,7 +441,7 @@ static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		}
 	}
 
-	if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
+	if ((index < lmv->tgts_size) && lmv->tgts[index]) {
 		tgt = lmv->tgts[index];
 		CERROR("%s: UUID %s already assigned at LOV target index %d: rc = %d\n",
 		       obd->obd_name,
@@ -460,7 +459,7 @@ static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		while (newsize < index + 1)
 			newsize <<= 1;
 		newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
-		if (newtgts == NULL) {
+		if (!newtgts) {
 			lmv_init_unlock(lmv);
 			return -ENOMEM;
 		}
@@ -539,11 +538,9 @@ int lmv_check_connect(struct obd_device *obd)
 	CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 	       lmv->cluuid.uuid, obd->obd_name);
 
-	LASSERT(lmv->tgts != NULL);
-
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 		tgt = lmv->tgts[i];
-		if (tgt == NULL)
+		if (!tgt)
 			continue;
 		rc = lmv_connect_mdc(obd, tgt);
 		if (rc)
@@ -563,7 +560,7 @@ int lmv_check_connect(struct obd_device *obd)
 		int rc2;
 
 		tgt = lmv->tgts[i];
-		if (tgt == NULL)
+		if (!tgt)
 			continue;
 		tgt->ltd_active = 0;
 		if (tgt->ltd_exp) {
@@ -586,9 +583,6 @@ static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 	struct obd_device      *mdc_obd;
 	int		     rc;
 
-	LASSERT(tgt != NULL);
-	LASSERT(obd != NULL);
-
 	mdc_obd = class_exp2obd(tgt->ltd_exp);
 
 	if (mdc_obd) {
@@ -641,7 +635,7 @@ static int lmv_disconnect(struct obd_export *exp)
 		goto out_local;
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 
 		lmv_disconnect_mdc(obd, lmv->tgts[i]);
@@ -686,7 +680,7 @@ repeat_fid2path:
 
 	/* If remote_gf != NULL, it means just building the
 	 * path on the remote MDT, copy this path segment to gf */
-	if (remote_gf != NULL) {
+	if (remote_gf) {
 		struct getinfo_fid2path *ori_gf;
 		char *ptr;
 
@@ -716,7 +710,7 @@ repeat_fid2path:
 		goto out_fid2path;
 
 	/* sigh, has to go to another MDT to do path building further */
-	if (remote_gf == NULL) {
+	if (!remote_gf) {
 		remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
 		remote_gf = kzalloc(remote_gf_size, GFP_NOFS);
 		if (!remote_gf) {
@@ -901,8 +895,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		if (index >= count)
 			return -ENODEV;
 
-		if (lmv->tgts[index] == NULL ||
-		    lmv->tgts[index]->ltd_active == 0)
+		if (!lmv->tgts[index] || lmv->tgts[index]->ltd_active == 0)
 			return -ENODATA;
 
 		mdc_obd = class_exp2obd(lmv->tgts[index]->ltd_exp);
@@ -936,18 +929,18 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 				return -EINVAL;
 
 			tgt = lmv->tgts[qctl->qc_idx];
-			if (tgt == NULL || tgt->ltd_exp == NULL)
+			if (!tgt || !tgt->ltd_exp)
 				return -EINVAL;
 		} else if (qctl->qc_valid == QC_UUID) {
 			for (i = 0; i < count; i++) {
 				tgt = lmv->tgts[i];
-				if (tgt == NULL)
+				if (!tgt)
 					continue;
 				if (!obd_uuid_equals(&tgt->ltd_uuid,
 						     &qctl->obd_uuid))
 					continue;
 
-				if (tgt->ltd_exp == NULL)
+				if (!tgt->ltd_exp)
 					return -EINVAL;
 
 				break;
@@ -981,8 +974,8 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		if (icc->icc_mdtindex >= count)
 			return -ENODEV;
 
-		if (lmv->tgts[icc->icc_mdtindex] == NULL ||
-		    lmv->tgts[icc->icc_mdtindex]->ltd_exp == NULL ||
+		if (!lmv->tgts[icc->icc_mdtindex] ||
+		    !lmv->tgts[icc->icc_mdtindex]->ltd_exp ||
 		    lmv->tgts[icc->icc_mdtindex]->ltd_active == 0)
 			return -ENODEV;
 		rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex]->ltd_exp,
@@ -990,7 +983,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		break;
 	}
 	case LL_IOC_GET_CONNECT_FLAGS: {
-		if (lmv->tgts[0] == NULL)
+		if (!lmv->tgts[0])
 			return -ENODATA;
 		rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
 		break;
@@ -1007,10 +1000,10 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 
 		tgt = lmv_find_target(lmv, &op_data->op_fid1);
 		if (IS_ERR(tgt))
-				return PTR_ERR(tgt);
+			return PTR_ERR(tgt);
 
-		if (tgt->ltd_exp == NULL)
-				return -EINVAL;
+		if (!tgt->ltd_exp)
+			return -EINVAL;
 
 		rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 		break;
@@ -1058,7 +1051,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 						  hur_user_item[nr])
 					 + hur->hur_request.hr_data_len;
 				req = libcfs_kvzalloc(reqlen, GFP_NOFS);
-				if (req == NULL)
+				if (!req)
 					return -ENOMEM;
 
 				lmv_hsm_req_build(lmv, hur, lmv->tgts[i], req);
@@ -1084,7 +1077,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		if (IS_ERR(tgt2))
 			return PTR_ERR(tgt2);
 
-		if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
+		if (!tgt1->ltd_exp || !tgt2->ltd_exp)
 			return -EINVAL;
 
 		/* only files on same MDT can have their layouts swapped */
@@ -1108,8 +1101,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 			struct obd_device *mdc_obd;
 			int err;
 
-			if (lmv->tgts[i] == NULL ||
-			    lmv->tgts[i]->ltd_exp == NULL)
+			if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 				continue;
 			/* ll_umount_begin() sets force flag but for lmv, not
 			 * mdc. Let's pass it through */
@@ -1189,7 +1181,7 @@ static int lmv_placement_policy(struct obd_device *obd,
 {
 	struct lmv_obd	  *lmv = &obd->u.lmv;
 
-	LASSERT(mds != NULL);
+	LASSERT(mds);
 
 	if (lmv->desc.ld_tgt_count == 1) {
 		*mds = 0;
@@ -1239,7 +1231,7 @@ int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
 	 */
 	mutex_lock(&tgt->ltd_fid_mutex);
 
-	if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL) {
+	if (tgt->ltd_active == 0 || !tgt->ltd_exp) {
 		rc = -ENODEV;
 		goto out;
 	}
@@ -1266,8 +1258,8 @@ int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
 	u32		       mds = 0;
 	int		    rc;
 
-	LASSERT(op_data != NULL);
-	LASSERT(fid != NULL);
+	LASSERT(op_data);
+	LASSERT(fid);
 
 	rc = lmv_placement_policy(obd, op_data, &mds);
 	if (rc) {
@@ -1305,7 +1297,7 @@ static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 	}
 
 	lmv->tgts = kcalloc(32, sizeof(*lmv->tgts), GFP_NOFS);
-	if (lmv->tgts == NULL)
+	if (!lmv->tgts)
 		return -ENOMEM;
 	lmv->tgts_size = 32;
 
@@ -1346,11 +1338,11 @@ static int lmv_cleanup(struct obd_device *obd)
 	struct lmv_obd   *lmv = &obd->u.lmv;
 
 	fld_client_fini(&lmv->lmv_fld);
-	if (lmv->tgts != NULL) {
+	if (lmv->tgts) {
 		int i;
 
 		for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-			if (lmv->tgts[i] == NULL)
+			if (!lmv->tgts[i])
 				continue;
 			lmv_del_target(lmv, i);
 		}
@@ -1416,7 +1408,7 @@ static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
 		return -ENOMEM;
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 
 		rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
@@ -1561,7 +1553,7 @@ static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
 	 * space of MDT storing inode.
 	 */
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 		md_null_inode(lmv->tgts[i]->ltd_exp, fid);
 	}
@@ -1589,7 +1581,7 @@ static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
 	 * space of MDT storing inode.
 	 */
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 		rc = md_find_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
 		if (rc)
@@ -1669,7 +1661,7 @@ static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
 		       cap_effective, rdev, request);
 
 	if (rc == 0) {
-		if (*request == NULL)
+		if (!*request)
 			return rc;
 		CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
 	}
@@ -1715,7 +1707,6 @@ lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
 	int			 pmode;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	if (!(body->valid & OBD_MD_MDS))
 		return 0;
@@ -1822,7 +1813,6 @@ lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
 
 	body = req_capsule_server_get(&(*request)->rq_pill,
 				      &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	if (body->valid & OBD_MD_MDS) {
 		struct lu_fid rid = body->fid1;
@@ -2111,7 +2101,7 @@ static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
 
 		while (--nlupgs > 0) {
 			ent = lu_dirent_start(dp);
-			for (end_dirent = ent; ent != NULL;
+			for (end_dirent = ent; ent;
 			     end_dirent = ent, ent = lu_dirent_next(ent))
 				;
 
@@ -2241,7 +2231,7 @@ retry:
 		return rc;
 
 	body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 
 	/* Not cross-ref case, just get out of here. */
@@ -2305,7 +2295,7 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
 	int		      rc = 0;
 
 	obd = class_exp2obd(exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
 		       exp->exp_handle.h_cookie);
 		return -EINVAL;
@@ -2326,7 +2316,7 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
 			/*
 			 * All tgts should be connected when this gets called.
 			 */
-			if (tgt == NULL || tgt->ltd_exp == NULL)
+			if (!tgt || !tgt->ltd_exp)
 				continue;
 
 			if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
@@ -2369,7 +2359,7 @@ static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	int rc = 0;
 
 	obd = class_exp2obd(exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
 		       exp->exp_handle.h_cookie);
 		return -EINVAL;
@@ -2382,7 +2372,7 @@ static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
 		for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 			tgt = lmv->tgts[i];
 
-			if (tgt == NULL || tgt->ltd_exp == NULL)
+			if (!tgt || !tgt->ltd_exp)
 				continue;
 
 			err = obd_set_info_async(env, tgt->ltd_exp,
@@ -2417,9 +2407,9 @@ static int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
 		return 0;
 	}
 
-	if (*lmmp == NULL) {
+	if (!*lmmp) {
 		*lmmp = libcfs_kvzalloc(mea_size, GFP_NOFS);
-		if (*lmmp == NULL)
+		if (!*lmmp)
 			return -ENOMEM;
 	}
 
@@ -2457,10 +2447,10 @@ static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	__u32		       magic;
 
 	mea_size = lmv_get_easize(lmv);
-	if (lsmp == NULL)
+	if (!lsmp)
 		return mea_size;
 
-	if (*lsmp != NULL && lmm == NULL) {
+	if (*lsmp && !lmm) {
 		kvfree(*tmea);
 		*lsmp = NULL;
 		return 0;
@@ -2469,7 +2459,7 @@ static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	LASSERT(mea_size == lmm_size);
 
 	*tmea = libcfs_kvzalloc(mea_size, GFP_NOFS);
-	if (*tmea == NULL)
+	if (!*tmea)
 		return -ENOMEM;
 
 	if (!lmm)
@@ -2508,10 +2498,10 @@ static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
 	int		      err;
 	int		      i;
 
-	LASSERT(fid != NULL);
+	LASSERT(fid);
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL ||
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp ||
 		    lmv->tgts[i]->ltd_active == 0)
 			continue;
 
@@ -2552,8 +2542,7 @@ static ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
 	 * one fid was created in.
 	 */
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL ||
-		    lmv->tgts[i]->ltd_exp == NULL ||
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp ||
 		    lmv->tgts[i]->ltd_active == 0)
 			continue;
 
@@ -2709,7 +2698,7 @@ static int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
 
 		tgt = lmv->tgts[i];
 
-		if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
+		if (!tgt || !tgt->ltd_exp || tgt->ltd_active == 0)
 			continue;
 		if (!tgt->ltd_active) {
 			CDEBUG(D_HA, "mdt %d is inactive.\n", i);
@@ -2744,7 +2733,7 @@ static int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
 		int err;
 
 		tgt = lmv->tgts[i];
-		if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
+		if (!tgt || !tgt->ltd_exp || !tgt->ltd_active) {
 			CERROR("lmv idx %d inactive\n", i);
 			return -EIO;
 		}
diff --git a/drivers/staging/lustre/lustre/lmv/lproc_lmv.c b/drivers/staging/lustre/lustre/lmv/lproc_lmv.c
index 40cf4d9..b39e364 100644
--- a/drivers/staging/lustre/lustre/lmv/lproc_lmv.c
+++ b/drivers/staging/lustre/lustre/lmv/lproc_lmv.c
@@ -138,7 +138,7 @@ static int lmv_desc_uuid_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lmv_obd	  *lmv;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	lmv = &dev->u.lmv;
 	seq_printf(m, "%s\n", lmv->desc.ld_uuid.uuid);
 	return 0;
@@ -171,7 +171,7 @@ static int lmv_tgt_seq_show(struct seq_file *p, void *v)
 {
 	struct lmv_tgt_desc     *tgt = v;
 
-	if (tgt == NULL)
+	if (!tgt)
 		return 0;
 	seq_printf(p, "%d: %s %sACTIVE\n",
 		   tgt->ltd_idx, tgt->ltd_uuid.uuid,
-- 
2.1.0

[lustre-devel] [PATCH 16/45] staging/lustre/lmv: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lmv/lmv_intent.c   |  11 +--
 drivers/staging/lustre/lustre/lmv/lmv_internal.h |   6 +-
 drivers/staging/lustre/lustre/lmv/lmv_obd.c      | 115 ++++++++++-------------
 drivers/staging/lustre/lustre/lmv/lproc_lmv.c    |   4 +-
 4 files changed, 61 insertions(+), 75 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lmv/lmv_intent.c b/drivers/staging/lustre/lustre/lmv/lmv_intent.c
index 66de27f..cb1ed42 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_intent.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_intent.c
@@ -69,7 +69,7 @@ static int lmv_intent_remote(struct obd_export *exp, void *lmm,
 	int			rc = 0;
 
 	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 
 	LASSERT((body->valid & OBD_MD_MDS));
@@ -107,7 +107,7 @@ static int lmv_intent_remote(struct obd_export *exp, void *lmm,
 
 	op_data->op_fid1 = body->fid1;
 	/* Sent the parent FID to the remote MDT */
-	if (parent_fid != NULL) {
+	if (parent_fid) {
 		/* The parent fid is only for remote open to
 		 * check whether the open is from OBF,
 		 * see mdt_cross_open */
@@ -204,7 +204,7 @@ static int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
 		return rc;
 
 	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 	/*
 	 * Not cross-ref case, just get out of here.
@@ -270,7 +270,7 @@ static int lmv_intent_lookup(struct obd_export *exp,
 	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
 			     flags, reqp, cb_blocking, extra_lock_flags);
 
-	if (rc < 0 || *reqp == NULL)
+	if (rc < 0 || !*reqp)
 		return rc;
 
 	/*
@@ -278,7 +278,7 @@ static int lmv_intent_lookup(struct obd_export *exp,
 	 * remote inode. Let's check this.
 	 */
 	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 	/* Not cross-ref case, just get out of here. */
 	if (likely(!(body->valid & OBD_MD_MDS)))
@@ -299,7 +299,6 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
 	struct obd_device *obd = exp->exp_obd;
 	int		rc;
 
-	LASSERT(it != NULL);
 	LASSERT(fid_is_sane(&op_data->op_fid1));
 
 	CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_internal.h b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
index eb8e673..041d30f33 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_internal.h
+++ b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
@@ -66,7 +66,7 @@ static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
 	struct mdt_body	 *body;
 	struct lmv_stripe_md    *mea;
 
-	LASSERT(req != NULL);
+	LASSERT(req);
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 
@@ -75,8 +75,6 @@ static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
 
 	mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
 					   body->eadatasize);
-	LASSERT(mea != NULL);
-
 	if (mea->mea_count == 0)
 		return NULL;
 	if (mea->mea_magic != MEA_MAGIC_LAST_CHAR &&
@@ -101,7 +99,7 @@ lmv_get_target(struct lmv_obd *lmv, u32 mds)
 	int i;
 
 	for (i = 0; i < count; i++) {
-		if (lmv->tgts[i] == NULL)
+		if (!lmv->tgts[i])
 			continue;
 
 		if (lmv->tgts[i]->ltd_idx == mds)
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index 733222c..2df369a 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -88,7 +88,7 @@ static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
 	spin_lock(&lmv->lmv_lock);
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 		tgt = lmv->tgts[i];
-		if (tgt == NULL || tgt->ltd_exp == NULL)
+		if (!tgt || !tgt->ltd_exp)
 			continue;
 
 		CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n", i,
@@ -104,7 +104,7 @@ static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
 	}
 
 	obd = class_exp2obd(tgt->ltd_exp);
-	if (obd == NULL) {
+	if (!obd) {
 		rc = -ENOTCONN;
 		goto out_lmv_lock;
 	}
@@ -262,7 +262,7 @@ static void lmv_set_timeouts(struct obd_device *obd)
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 		tgt = lmv->tgts[i];
-		if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
+		if (!tgt || !tgt->ltd_exp || tgt->ltd_active == 0)
 			continue;
 
 		obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
@@ -302,8 +302,7 @@ static int lmv_init_ea_size(struct obd_export *exp, int easize,
 		return 0;
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL ||
-		    lmv->tgts[i]->ltd_exp == NULL ||
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp ||
 		    lmv->tgts[i]->ltd_active == 0) {
 			CWARN("%s: NULL export for %d\n", obd->obd_name, i);
 			continue;
@@ -410,7 +409,7 @@ static int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 
 static void lmv_del_target(struct lmv_obd *lmv, int index)
 {
-	if (lmv->tgts[index] == NULL)
+	if (!lmv->tgts[index])
 		return;
 
 	kfree(lmv->tgts[index]);
@@ -442,7 +441,7 @@ static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		}
 	}
 
-	if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
+	if ((index < lmv->tgts_size) && lmv->tgts[index]) {
 		tgt = lmv->tgts[index];
 		CERROR("%s: UUID %s already assigned at LOV target index %d: rc = %d\n",
 		       obd->obd_name,
@@ -460,7 +459,7 @@ static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 		while (newsize < index + 1)
 			newsize <<= 1;
 		newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
-		if (newtgts == NULL) {
+		if (!newtgts) {
 			lmv_init_unlock(lmv);
 			return -ENOMEM;
 		}
@@ -539,11 +538,9 @@ int lmv_check_connect(struct obd_device *obd)
 	CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 	       lmv->cluuid.uuid, obd->obd_name);
 
-	LASSERT(lmv->tgts != NULL);
-
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 		tgt = lmv->tgts[i];
-		if (tgt == NULL)
+		if (!tgt)
 			continue;
 		rc = lmv_connect_mdc(obd, tgt);
 		if (rc)
@@ -563,7 +560,7 @@ int lmv_check_connect(struct obd_device *obd)
 		int rc2;
 
 		tgt = lmv->tgts[i];
-		if (tgt == NULL)
+		if (!tgt)
 			continue;
 		tgt->ltd_active = 0;
 		if (tgt->ltd_exp) {
@@ -586,9 +583,6 @@ static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 	struct obd_device      *mdc_obd;
 	int		     rc;
 
-	LASSERT(tgt != NULL);
-	LASSERT(obd != NULL);
-
 	mdc_obd = class_exp2obd(tgt->ltd_exp);
 
 	if (mdc_obd) {
@@ -641,7 +635,7 @@ static int lmv_disconnect(struct obd_export *exp)
 		goto out_local;
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 
 		lmv_disconnect_mdc(obd, lmv->tgts[i]);
@@ -686,7 +680,7 @@ repeat_fid2path:
 
 	/* If remote_gf != NULL, it means just building the
 	 * path on the remote MDT, copy this path segment to gf */
-	if (remote_gf != NULL) {
+	if (remote_gf) {
 		struct getinfo_fid2path *ori_gf;
 		char *ptr;
 
@@ -716,7 +710,7 @@ repeat_fid2path:
 		goto out_fid2path;
 
 	/* sigh, has to go to another MDT to do path building further */
-	if (remote_gf == NULL) {
+	if (!remote_gf) {
 		remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
 		remote_gf = kzalloc(remote_gf_size, GFP_NOFS);
 		if (!remote_gf) {
@@ -901,8 +895,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		if (index >= count)
 			return -ENODEV;
 
-		if (lmv->tgts[index] == NULL ||
-		    lmv->tgts[index]->ltd_active == 0)
+		if (!lmv->tgts[index] || lmv->tgts[index]->ltd_active == 0)
 			return -ENODATA;
 
 		mdc_obd = class_exp2obd(lmv->tgts[index]->ltd_exp);
@@ -936,18 +929,18 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 				return -EINVAL;
 
 			tgt = lmv->tgts[qctl->qc_idx];
-			if (tgt == NULL || tgt->ltd_exp == NULL)
+			if (!tgt || !tgt->ltd_exp)
 				return -EINVAL;
 		} else if (qctl->qc_valid == QC_UUID) {
 			for (i = 0; i < count; i++) {
 				tgt = lmv->tgts[i];
-				if (tgt == NULL)
+				if (!tgt)
 					continue;
 				if (!obd_uuid_equals(&tgt->ltd_uuid,
 						     &qctl->obd_uuid))
 					continue;
 
-				if (tgt->ltd_exp == NULL)
+				if (!tgt->ltd_exp)
 					return -EINVAL;
 
 				break;
@@ -981,8 +974,8 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		if (icc->icc_mdtindex >= count)
 			return -ENODEV;
 
-		if (lmv->tgts[icc->icc_mdtindex] == NULL ||
-		    lmv->tgts[icc->icc_mdtindex]->ltd_exp == NULL ||
+		if (!lmv->tgts[icc->icc_mdtindex] ||
+		    !lmv->tgts[icc->icc_mdtindex]->ltd_exp ||
 		    lmv->tgts[icc->icc_mdtindex]->ltd_active == 0)
 			return -ENODEV;
 		rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex]->ltd_exp,
@@ -990,7 +983,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		break;
 	}
 	case LL_IOC_GET_CONNECT_FLAGS: {
-		if (lmv->tgts[0] == NULL)
+		if (!lmv->tgts[0])
 			return -ENODATA;
 		rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
 		break;
@@ -1007,10 +1000,10 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 
 		tgt = lmv_find_target(lmv, &op_data->op_fid1);
 		if (IS_ERR(tgt))
-				return PTR_ERR(tgt);
+			return PTR_ERR(tgt);
 
-		if (tgt->ltd_exp == NULL)
-				return -EINVAL;
+		if (!tgt->ltd_exp)
+			return -EINVAL;
 
 		rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 		break;
@@ -1058,7 +1051,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 						  hur_user_item[nr])
 					 + hur->hur_request.hr_data_len;
 				req = libcfs_kvzalloc(reqlen, GFP_NOFS);
-				if (req == NULL)
+				if (!req)
 					return -ENOMEM;
 
 				lmv_hsm_req_build(lmv, hur, lmv->tgts[i], req);
@@ -1084,7 +1077,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 		if (IS_ERR(tgt2))
 			return PTR_ERR(tgt2);
 
-		if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
+		if (!tgt1->ltd_exp || !tgt2->ltd_exp)
 			return -EINVAL;
 
 		/* only files on same MDT can have their layouts swapped */
@@ -1108,8 +1101,7 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 			struct obd_device *mdc_obd;
 			int err;
 
-			if (lmv->tgts[i] == NULL ||
-			    lmv->tgts[i]->ltd_exp == NULL)
+			if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 				continue;
 			/* ll_umount_begin() sets force flag but for lmv, not
 			 * mdc. Let's pass it through */
@@ -1189,7 +1181,7 @@ static int lmv_placement_policy(struct obd_device *obd,
 {
 	struct lmv_obd	  *lmv = &obd->u.lmv;
 
-	LASSERT(mds != NULL);
+	LASSERT(mds);
 
 	if (lmv->desc.ld_tgt_count == 1) {
 		*mds = 0;
@@ -1239,7 +1231,7 @@ int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
 	 */
 	mutex_lock(&tgt->ltd_fid_mutex);
 
-	if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL) {
+	if (tgt->ltd_active == 0 || !tgt->ltd_exp) {
 		rc = -ENODEV;
 		goto out;
 	}
@@ -1266,8 +1258,8 @@ int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
 	u32		       mds = 0;
 	int		    rc;
 
-	LASSERT(op_data != NULL);
-	LASSERT(fid != NULL);
+	LASSERT(op_data);
+	LASSERT(fid);
 
 	rc = lmv_placement_policy(obd, op_data, &mds);
 	if (rc) {
@@ -1305,7 +1297,7 @@ static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 	}
 
 	lmv->tgts = kcalloc(32, sizeof(*lmv->tgts), GFP_NOFS);
-	if (lmv->tgts == NULL)
+	if (!lmv->tgts)
 		return -ENOMEM;
 	lmv->tgts_size = 32;
 
@@ -1346,11 +1338,11 @@ static int lmv_cleanup(struct obd_device *obd)
 	struct lmv_obd   *lmv = &obd->u.lmv;
 
 	fld_client_fini(&lmv->lmv_fld);
-	if (lmv->tgts != NULL) {
+	if (lmv->tgts) {
 		int i;
 
 		for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-			if (lmv->tgts[i] == NULL)
+			if (!lmv->tgts[i])
 				continue;
 			lmv_del_target(lmv, i);
 		}
@@ -1416,7 +1408,7 @@ static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
 		return -ENOMEM;
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 
 		rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
@@ -1561,7 +1553,7 @@ static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
 	 * space of MDT storing inode.
 	 */
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 		md_null_inode(lmv->tgts[i]->ltd_exp, fid);
 	}
@@ -1589,7 +1581,7 @@ static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
 	 * space of MDT storing inode.
 	 */
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
 			continue;
 		rc = md_find_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
 		if (rc)
@@ -1669,7 +1661,7 @@ static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
 		       cap_effective, rdev, request);
 
 	if (rc == 0) {
-		if (*request == NULL)
+		if (!*request)
 			return rc;
 		CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
 	}
@@ -1715,7 +1707,6 @@ lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
 	int			 pmode;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	if (!(body->valid & OBD_MD_MDS))
 		return 0;
@@ -1822,7 +1813,6 @@ lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
 
 	body = req_capsule_server_get(&(*request)->rq_pill,
 				      &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	if (body->valid & OBD_MD_MDS) {
 		struct lu_fid rid = body->fid1;
@@ -2111,7 +2101,7 @@ static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
 
 		while (--nlupgs > 0) {
 			ent = lu_dirent_start(dp);
-			for (end_dirent = ent; ent != NULL;
+			for (end_dirent = ent; ent;
 			     end_dirent = ent, ent = lu_dirent_next(ent))
 				;
 
@@ -2241,7 +2231,7 @@ retry:
 		return rc;
 
 	body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 
 	/* Not cross-ref case, just get out of here. */
@@ -2305,7 +2295,7 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
 	int		      rc = 0;
 
 	obd = class_exp2obd(exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
 		       exp->exp_handle.h_cookie);
 		return -EINVAL;
@@ -2326,7 +2316,7 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
 			/*
 			 * All tgts should be connected when this gets called.
 			 */
-			if (tgt == NULL || tgt->ltd_exp == NULL)
+			if (!tgt || !tgt->ltd_exp)
 				continue;
 
 			if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
@@ -2369,7 +2359,7 @@ static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	int rc = 0;
 
 	obd = class_exp2obd(exp);
-	if (obd == NULL) {
+	if (!obd) {
 		CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
 		       exp->exp_handle.h_cookie);
 		return -EINVAL;
@@ -2382,7 +2372,7 @@ static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
 		for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
 			tgt = lmv->tgts[i];
 
-			if (tgt == NULL || tgt->ltd_exp == NULL)
+			if (!tgt || !tgt->ltd_exp)
 				continue;
 
 			err = obd_set_info_async(env, tgt->ltd_exp,
@@ -2417,9 +2407,9 @@ static int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
 		return 0;
 	}
 
-	if (*lmmp == NULL) {
+	if (!*lmmp) {
 		*lmmp = libcfs_kvzalloc(mea_size, GFP_NOFS);
-		if (*lmmp == NULL)
+		if (!*lmmp)
 			return -ENOMEM;
 	}
 
@@ -2457,10 +2447,10 @@ static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	__u32		       magic;
 
 	mea_size = lmv_get_easize(lmv);
-	if (lsmp == NULL)
+	if (!lsmp)
 		return mea_size;
 
-	if (*lsmp != NULL && lmm == NULL) {
+	if (*lsmp && !lmm) {
 		kvfree(*tmea);
 		*lsmp = NULL;
 		return 0;
@@ -2469,7 +2459,7 @@ static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	LASSERT(mea_size == lmm_size);
 
 	*tmea = libcfs_kvzalloc(mea_size, GFP_NOFS);
-	if (*tmea == NULL)
+	if (!*tmea)
 		return -ENOMEM;
 
 	if (!lmm)
@@ -2508,10 +2498,10 @@ static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
 	int		      err;
 	int		      i;
 
-	LASSERT(fid != NULL);
+	LASSERT(fid);
 
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL ||
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp ||
 		    lmv->tgts[i]->ltd_active == 0)
 			continue;
 
@@ -2552,8 +2542,7 @@ static ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
 	 * one fid was created in.
 	 */
 	for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
-		if (lmv->tgts[i] == NULL ||
-		    lmv->tgts[i]->ltd_exp == NULL ||
+		if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp ||
 		    lmv->tgts[i]->ltd_active == 0)
 			continue;
 
@@ -2709,7 +2698,7 @@ static int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
 
 		tgt = lmv->tgts[i];
 
-		if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
+		if (!tgt || !tgt->ltd_exp || tgt->ltd_active == 0)
 			continue;
 		if (!tgt->ltd_active) {
 			CDEBUG(D_HA, "mdt %d is inactive.\n", i);
@@ -2744,7 +2733,7 @@ static int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
 		int err;
 
 		tgt = lmv->tgts[i];
-		if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
+		if (!tgt || !tgt->ltd_exp || !tgt->ltd_active) {
 			CERROR("lmv idx %d inactive\n", i);
 			return -EIO;
 		}
diff --git a/drivers/staging/lustre/lustre/lmv/lproc_lmv.c b/drivers/staging/lustre/lustre/lmv/lproc_lmv.c
index 40cf4d9..b39e364 100644
--- a/drivers/staging/lustre/lustre/lmv/lproc_lmv.c
+++ b/drivers/staging/lustre/lustre/lmv/lproc_lmv.c
@@ -138,7 +138,7 @@ static int lmv_desc_uuid_seq_show(struct seq_file *m, void *v)
 	struct obd_device *dev = (struct obd_device *)m->private;
 	struct lmv_obd	  *lmv;
 
-	LASSERT(dev != NULL);
+	LASSERT(dev);
 	lmv = &dev->u.lmv;
 	seq_printf(m, "%s\n", lmv->desc.ld_uuid.uuid);
 	return 0;
@@ -171,7 +171,7 @@ static int lmv_tgt_seq_show(struct seq_file *p, void *v)
 {
 	struct lmv_tgt_desc     *tgt = v;
 
-	if (tgt == NULL)
+	if (!tgt)
 		return 0;
 	seq_printf(p, "%d: %s %sACTIVE\n",
 		   tgt->ltd_idx, tgt->ltd_uuid.uuid,
-- 
2.1.0

[PATCH 17/45] staging/lustre/fid: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/fid/fid_request.c | 14 +++++++-------
 drivers/staging/lustre/lustre/fid/lproc_fid.c   | 14 ++------------
 2 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fid/fid_request.c b/drivers/staging/lustre/lustre/fid/fid_request.c
index ff8f38d..7ca65df 100644
--- a/drivers/staging/lustre/lustre/fid/fid_request.c
+++ b/drivers/staging/lustre/lustre/fid/fid_request.c
@@ -68,7 +68,7 @@ static int seq_client_rpc(struct lu_client_seq *seq,
 
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_SEQ_QUERY,
 					LUSTRE_MDS_VERSION, SEQ_QUERY);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	/* Init operation code */
@@ -226,8 +226,8 @@ int seq_client_alloc_fid(const struct lu_env *env,
 	wait_queue_t link;
 	int rc;
 
-	LASSERT(seq != NULL);
-	LASSERT(fid != NULL);
+	LASSERT(seq);
+	LASSERT(fid);
 
 	init_waitqueue_entry(&link, current);
 	mutex_lock(&seq->lcs_mutex);
@@ -292,7 +292,7 @@ void seq_client_flush(struct lu_client_seq *seq)
 {
 	wait_queue_t link;
 
-	LASSERT(seq != NULL);
+	LASSERT(seq);
 	init_waitqueue_entry(&link, current);
 	mutex_lock(&seq->lcs_mutex);
 
@@ -375,8 +375,8 @@ static int seq_client_init(struct lu_client_seq *seq,
 {
 	int rc;
 
-	LASSERT(seq != NULL);
-	LASSERT(prefix != NULL);
+	LASSERT(seq);
+	LASSERT(prefix);
 
 	seq->lcs_type = type;
 
@@ -438,7 +438,7 @@ int client_fid_fini(struct obd_device *obd)
 {
 	struct client_obd *cli = &obd->u.cli;
 
-	if (cli->cl_seq != NULL) {
+	if (cli->cl_seq) {
 		seq_client_fini(cli->cl_seq);
 		kfree(cli->cl_seq);
 		cli->cl_seq = NULL;
diff --git a/drivers/staging/lustre/lustre/fid/lproc_fid.c b/drivers/staging/lustre/lustre/fid/lproc_fid.c
index 0320b6e..1f0e786 100644
--- a/drivers/staging/lustre/lustre/fid/lproc_fid.c
+++ b/drivers/staging/lustre/lustre/fid/lproc_fid.c
@@ -66,7 +66,7 @@ ldebugfs_fid_write_common(const char __user *buffer, size_t count,
 	int rc;
 	char kernbuf[MAX_FID_RANGE_STRLEN];
 
-	LASSERT(range != NULL);
+	LASSERT(range);
 
 	if (count >= sizeof(kernbuf))
 		return -EINVAL;
@@ -104,7 +104,6 @@ ldebugfs_fid_space_seq_write(struct file *file,
 	int rc;
 
 	seq = ((struct seq_file *)file->private_data)->private;
-	LASSERT(seq != NULL);
 
 	mutex_lock(&seq->lcs_mutex);
 	rc = ldebugfs_fid_write_common(buffer, count, &seq->lcs_space);
@@ -124,8 +123,6 @@ ldebugfs_fid_space_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 
-	LASSERT(seq != NULL);
-
 	mutex_lock(&seq->lcs_mutex);
 	seq_printf(m, "[%#llx - %#llx]:%x:%s\n", PRANGE(&seq->lcs_space));
 	mutex_unlock(&seq->lcs_mutex);
@@ -143,7 +140,6 @@ ldebugfs_fid_width_seq_write(struct file *file,
 	int rc, val;
 
 	seq = ((struct seq_file *)file->private_data)->private;
-	LASSERT(seq != NULL);
 
 	rc = lprocfs_write_helper(buffer, count, &val);
 	if (rc)
@@ -172,8 +168,6 @@ ldebugfs_fid_width_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 
-	LASSERT(seq != NULL);
-
 	mutex_lock(&seq->lcs_mutex);
 	seq_printf(m, "%llu\n", seq->lcs_width);
 	mutex_unlock(&seq->lcs_mutex);
@@ -186,8 +180,6 @@ ldebugfs_fid_fid_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 
-	LASSERT(seq != NULL);
-
 	mutex_lock(&seq->lcs_mutex);
 	seq_printf(m, DFID "\n", PFID(&seq->lcs_fid));
 	mutex_unlock(&seq->lcs_mutex);
@@ -201,9 +193,7 @@ ldebugfs_fid_server_seq_show(struct seq_file *m, void *unused)
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 	struct client_obd *cli;
 
-	LASSERT(seq != NULL);
-
-	if (seq->lcs_exp != NULL) {
+	if (seq->lcs_exp) {
 		cli = &seq->lcs_exp->exp_obd->u.cli;
 		seq_printf(m, "%s\n", cli->cl_target_uuid.uuid);
 	}
-- 
2.1.0

[lustre-devel] [PATCH 17/45] staging/lustre/fid: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/fid/fid_request.c | 14 +++++++-------
 drivers/staging/lustre/lustre/fid/lproc_fid.c   | 14 ++------------
 2 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fid/fid_request.c b/drivers/staging/lustre/lustre/fid/fid_request.c
index ff8f38d..7ca65df 100644
--- a/drivers/staging/lustre/lustre/fid/fid_request.c
+++ b/drivers/staging/lustre/lustre/fid/fid_request.c
@@ -68,7 +68,7 @@ static int seq_client_rpc(struct lu_client_seq *seq,
 
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_SEQ_QUERY,
 					LUSTRE_MDS_VERSION, SEQ_QUERY);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	/* Init operation code */
@@ -226,8 +226,8 @@ int seq_client_alloc_fid(const struct lu_env *env,
 	wait_queue_t link;
 	int rc;
 
-	LASSERT(seq != NULL);
-	LASSERT(fid != NULL);
+	LASSERT(seq);
+	LASSERT(fid);
 
 	init_waitqueue_entry(&link, current);
 	mutex_lock(&seq->lcs_mutex);
@@ -292,7 +292,7 @@ void seq_client_flush(struct lu_client_seq *seq)
 {
 	wait_queue_t link;
 
-	LASSERT(seq != NULL);
+	LASSERT(seq);
 	init_waitqueue_entry(&link, current);
 	mutex_lock(&seq->lcs_mutex);
 
@@ -375,8 +375,8 @@ static int seq_client_init(struct lu_client_seq *seq,
 {
 	int rc;
 
-	LASSERT(seq != NULL);
-	LASSERT(prefix != NULL);
+	LASSERT(seq);
+	LASSERT(prefix);
 
 	seq->lcs_type = type;
 
@@ -438,7 +438,7 @@ int client_fid_fini(struct obd_device *obd)
 {
 	struct client_obd *cli = &obd->u.cli;
 
-	if (cli->cl_seq != NULL) {
+	if (cli->cl_seq) {
 		seq_client_fini(cli->cl_seq);
 		kfree(cli->cl_seq);
 		cli->cl_seq = NULL;
diff --git a/drivers/staging/lustre/lustre/fid/lproc_fid.c b/drivers/staging/lustre/lustre/fid/lproc_fid.c
index 0320b6e..1f0e786 100644
--- a/drivers/staging/lustre/lustre/fid/lproc_fid.c
+++ b/drivers/staging/lustre/lustre/fid/lproc_fid.c
@@ -66,7 +66,7 @@ ldebugfs_fid_write_common(const char __user *buffer, size_t count,
 	int rc;
 	char kernbuf[MAX_FID_RANGE_STRLEN];
 
-	LASSERT(range != NULL);
+	LASSERT(range);
 
 	if (count >= sizeof(kernbuf))
 		return -EINVAL;
@@ -104,7 +104,6 @@ ldebugfs_fid_space_seq_write(struct file *file,
 	int rc;
 
 	seq = ((struct seq_file *)file->private_data)->private;
-	LASSERT(seq != NULL);
 
 	mutex_lock(&seq->lcs_mutex);
 	rc = ldebugfs_fid_write_common(buffer, count, &seq->lcs_space);
@@ -124,8 +123,6 @@ ldebugfs_fid_space_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 
-	LASSERT(seq != NULL);
-
 	mutex_lock(&seq->lcs_mutex);
 	seq_printf(m, "[%#llx - %#llx]:%x:%s\n", PRANGE(&seq->lcs_space));
 	mutex_unlock(&seq->lcs_mutex);
@@ -143,7 +140,6 @@ ldebugfs_fid_width_seq_write(struct file *file,
 	int rc, val;
 
 	seq = ((struct seq_file *)file->private_data)->private;
-	LASSERT(seq != NULL);
 
 	rc = lprocfs_write_helper(buffer, count, &val);
 	if (rc)
@@ -172,8 +168,6 @@ ldebugfs_fid_width_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 
-	LASSERT(seq != NULL);
-
 	mutex_lock(&seq->lcs_mutex);
 	seq_printf(m, "%llu\n", seq->lcs_width);
 	mutex_unlock(&seq->lcs_mutex);
@@ -186,8 +180,6 @@ ldebugfs_fid_fid_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 
-	LASSERT(seq != NULL);
-
 	mutex_lock(&seq->lcs_mutex);
 	seq_printf(m, DFID "\n", PFID(&seq->lcs_fid));
 	mutex_unlock(&seq->lcs_mutex);
@@ -201,9 +193,7 @@ ldebugfs_fid_server_seq_show(struct seq_file *m, void *unused)
 	struct lu_client_seq *seq = (struct lu_client_seq *)m->private;
 	struct client_obd *cli;
 
-	LASSERT(seq != NULL);
-
-	if (seq->lcs_exp != NULL) {
+	if (seq->lcs_exp) {
 		cli = &seq->lcs_exp->exp_obd->u.cli;
 		seq_printf(m, "%s\n", cli->cl_target_uuid.uuid);
 	}
-- 
2.1.0

[PATCH 18/45] staging/lustre/fld: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/fld/fld_cache.c    | 10 +++-----
 drivers/staging/lustre/lustre/fld/fld_internal.h |  2 +-
 drivers/staging/lustre/lustre/fld/fld_request.c  | 32 +++++++++++-------------
 drivers/staging/lustre/lustre/fld/lproc_fld.c    | 11 ++------
 4 files changed, 22 insertions(+), 33 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fld/fld_cache.c b/drivers/staging/lustre/lustre/fld/fld_cache.c
index d9459e5..a7026a9 100644
--- a/drivers/staging/lustre/lustre/fld/fld_cache.c
+++ b/drivers/staging/lustre/lustre/fld/fld_cache.c
@@ -65,7 +65,7 @@ struct fld_cache *fld_cache_init(const char *name,
 {
 	struct fld_cache *cache;
 
-	LASSERT(name != NULL);
+	LASSERT(name);
 	LASSERT(cache_threshold < cache_size);
 
 	cache = kzalloc(sizeof(*cache), GFP_NOFS);
@@ -100,7 +100,7 @@ void fld_cache_fini(struct fld_cache *cache)
 {
 	__u64 pct;
 
-	LASSERT(cache != NULL);
+	LASSERT(cache);
 	fld_cache_flush(cache);
 
 	if (cache->fci_stat.fst_count > 0) {
@@ -218,8 +218,6 @@ static int fld_cache_shrink(struct fld_cache *cache)
 	struct list_head *curr;
 	int num = 0;
 
-	LASSERT(cache != NULL);
-
 	if (cache->fci_cache_count < cache->fci_cache_size)
 		return 0;
 
@@ -414,7 +412,7 @@ static int fld_cache_insert_nolock(struct fld_cache *cache,
 		}
 	}
 
-	if (prev == NULL)
+	if (!prev)
 		prev = head;
 
 	CDEBUG(D_INFO, "insert range "DRANGE"\n", PRANGE(&f_new->fce_range));
@@ -499,7 +497,7 @@ int fld_cache_lookup(struct fld_cache *cache,
 	cache->fci_stat.fst_count++;
 	list_for_each_entry(flde, head, fce_list) {
 		if (flde->fce_range.lsr_start > seq) {
-			if (prev != NULL)
+			if (prev)
 				*range = prev->fce_range;
 			break;
 		}
diff --git a/drivers/staging/lustre/lustre/fld/fld_internal.h b/drivers/staging/lustre/lustre/fld/fld_internal.h
index 12eb164..59eabda 100644
--- a/drivers/staging/lustre/lustre/fld/fld_internal.h
+++ b/drivers/staging/lustre/lustre/fld/fld_internal.h
@@ -169,7 +169,7 @@ struct fld_cache_entry
 static inline const char *
 fld_target_name(struct lu_fld_target *tar)
 {
-	if (tar->ft_srv != NULL)
+	if (tar->ft_srv)
 		return tar->ft_srv->lsf_name;
 
 	return (const char *)tar->ft_exp->exp_obd->obd_name;
diff --git a/drivers/staging/lustre/lustre/fld/fld_request.c b/drivers/staging/lustre/lustre/fld/fld_request.c
index d92c01b..222d18d 100644
--- a/drivers/staging/lustre/lustre/fld/fld_request.c
+++ b/drivers/staging/lustre/lustre/fld/fld_request.c
@@ -148,9 +148,9 @@ again:
 		fld->lcf_name, hash, seq, fld->lcf_count);
 
 	list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
-		const char *srv_name = target->ft_srv != NULL  ?
+		const char *srv_name = target->ft_srv ?
 			target->ft_srv->lsf_name : "<null>";
-		const char *exp_name = target->ft_exp != NULL ?
+		const char *exp_name = target->ft_exp ?
 			(char *)target->ft_exp->exp_obd->obd_uuid.uuid :
 			"<null>";
 
@@ -183,13 +183,13 @@ fld_client_get_target(struct lu_client_fld *fld, u64 seq)
 {
 	struct lu_fld_target *target;
 
-	LASSERT(fld->lcf_hash != NULL);
+	LASSERT(fld->lcf_hash);
 
 	spin_lock(&fld->lcf_lock);
 	target = fld->lcf_hash->fh_scan_func(fld, seq);
 	spin_unlock(&fld->lcf_lock);
 
-	if (target != NULL) {
+	if (target) {
 		CDEBUG(D_INFO, "%s: Found target (idx %llu) by seq %#llx\n",
 		       fld->lcf_name, target->ft_idx, seq);
 	}
@@ -207,10 +207,10 @@ int fld_client_add_target(struct lu_client_fld *fld,
 	const char *name;
 	struct lu_fld_target *target, *tmp;
 
-	LASSERT(tar != NULL);
+	LASSERT(tar);
 	name = fld_target_name(tar);
-	LASSERT(name != NULL);
-	LASSERT(tar->ft_srv != NULL || tar->ft_exp != NULL);
+	LASSERT(name);
+	LASSERT(tar->ft_srv || tar->ft_exp);
 
 	if (fld->lcf_flags != LUSTRE_FLD_INIT) {
 		CERROR("%s: Attempt to add target %s (idx %llu) on fly - skip it\n",
@@ -236,7 +236,7 @@ int fld_client_add_target(struct lu_client_fld *fld,
 	}
 
 	target->ft_exp = tar->ft_exp;
-	if (target->ft_exp != NULL)
+	if (target->ft_exp)
 		class_export_get(target->ft_exp);
 	target->ft_srv = tar->ft_srv;
 	target->ft_idx = tar->ft_idx;
@@ -264,7 +264,7 @@ int fld_client_del_target(struct lu_client_fld *fld, __u64 idx)
 			list_del(&target->ft_chain);
 			spin_unlock(&fld->lcf_lock);
 
-			if (target->ft_exp != NULL)
+			if (target->ft_exp)
 				class_export_put(target->ft_exp);
 
 			kfree(target);
@@ -326,8 +326,6 @@ int fld_client_init(struct lu_client_fld *fld,
 	int cache_size, cache_threshold;
 	int rc;
 
-	LASSERT(fld != NULL);
-
 	snprintf(fld->lcf_name, sizeof(fld->lcf_name),
 		 "cli-%s", prefix);
 
@@ -379,13 +377,13 @@ void fld_client_fini(struct lu_client_fld *fld)
 				     &fld->lcf_targets, ft_chain) {
 		fld->lcf_count--;
 		list_del(&target->ft_chain);
-		if (target->ft_exp != NULL)
+		if (target->ft_exp)
 			class_export_put(target->ft_exp);
 		kfree(target);
 	}
 	spin_unlock(&fld->lcf_lock);
 
-	if (fld->lcf_cache != NULL) {
+	if (fld->lcf_cache) {
 		if (!IS_ERR(fld->lcf_cache))
 			fld_cache_fini(fld->lcf_cache);
 		fld->lcf_cache = NULL;
@@ -402,12 +400,12 @@ int fld_client_rpc(struct obd_export *exp,
 	int		    rc;
 	struct obd_import     *imp;
 
-	LASSERT(exp != NULL);
+	LASSERT(exp);
 
 	imp = class_exp2cliimp(exp);
 	req = ptlrpc_request_alloc_pack(imp, &RQF_FLD_QUERY, LUSTRE_MDS_VERSION,
 					FLD_QUERY);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	op = req_capsule_client_get(&req->rq_pill, &RMF_FLD_OPC);
@@ -436,7 +434,7 @@ int fld_client_rpc(struct obd_export *exp,
 		goto out_req;
 
 	prange = req_capsule_server_get(&req->rq_pill, &RMF_FLD_MDFLD);
-	if (prange == NULL) {
+	if (!prange) {
 		rc = -EFAULT;
 		goto out_req;
 	}
@@ -463,7 +461,7 @@ int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
 
 	/* Can not find it in the cache */
 	target = fld_client_get_target(fld, seq);
-	LASSERT(target != NULL);
+	LASSERT(target);
 
 	CDEBUG(D_INFO, "%s: Lookup fld entry (seq: %#llx) on target %s (idx %llu)\n",
 			fld->lcf_name, seq, fld_target_name(target), target->ft_idx);
diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c b/drivers/staging/lustre/lustre/fld/lproc_fld.c
index 41ceaa8..da31281 100644
--- a/drivers/staging/lustre/lustre/fld/lproc_fld.c
+++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c
@@ -60,8 +60,6 @@ fld_debugfs_targets_seq_show(struct seq_file *m, void *unused)
 	struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
 	struct lu_fld_target *target;
 
-	LASSERT(fld != NULL);
-
 	spin_lock(&fld->lcf_lock);
 	list_for_each_entry(target,
 				&fld->lcf_targets, ft_chain)
@@ -76,8 +74,6 @@ fld_debugfs_hash_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
 
-	LASSERT(fld != NULL);
-
 	spin_lock(&fld->lcf_lock);
 	seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
 	spin_unlock(&fld->lcf_lock);
@@ -102,9 +98,8 @@ fld_debugfs_hash_seq_write(struct file *file,
 		return -EFAULT;
 
 	fld = ((struct seq_file *)file->private_data)->private;
-	LASSERT(fld != NULL);
 
-	for (i = 0; fld_hash[i].fh_name != NULL; i++) {
+	for (i = 0; fld_hash[i].fh_name; i++) {
 		if (count != strlen(fld_hash[i].fh_name))
 			continue;
 
@@ -114,7 +109,7 @@ fld_debugfs_hash_seq_write(struct file *file,
 		}
 	}
 
-	if (hash != NULL) {
+	if (hash) {
 		spin_lock(&fld->lcf_lock);
 		fld->lcf_hash = hash;
 		spin_unlock(&fld->lcf_lock);
@@ -132,8 +127,6 @@ fld_debugfs_cache_flush_write(struct file *file, const char __user *buffer,
 {
 	struct lu_client_fld *fld = file->private_data;
 
-	LASSERT(fld != NULL);
-
 	fld_cache_flush(fld->lcf_cache);
 
 	CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
-- 
2.1.0

[lustre-devel] [PATCH 18/45] staging/lustre/fld: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/fld/fld_cache.c    | 10 +++-----
 drivers/staging/lustre/lustre/fld/fld_internal.h |  2 +-
 drivers/staging/lustre/lustre/fld/fld_request.c  | 32 +++++++++++-------------
 drivers/staging/lustre/lustre/fld/lproc_fld.c    | 11 ++------
 4 files changed, 22 insertions(+), 33 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fld/fld_cache.c b/drivers/staging/lustre/lustre/fld/fld_cache.c
index d9459e5..a7026a9 100644
--- a/drivers/staging/lustre/lustre/fld/fld_cache.c
+++ b/drivers/staging/lustre/lustre/fld/fld_cache.c
@@ -65,7 +65,7 @@ struct fld_cache *fld_cache_init(const char *name,
 {
 	struct fld_cache *cache;
 
-	LASSERT(name != NULL);
+	LASSERT(name);
 	LASSERT(cache_threshold < cache_size);
 
 	cache = kzalloc(sizeof(*cache), GFP_NOFS);
@@ -100,7 +100,7 @@ void fld_cache_fini(struct fld_cache *cache)
 {
 	__u64 pct;
 
-	LASSERT(cache != NULL);
+	LASSERT(cache);
 	fld_cache_flush(cache);
 
 	if (cache->fci_stat.fst_count > 0) {
@@ -218,8 +218,6 @@ static int fld_cache_shrink(struct fld_cache *cache)
 	struct list_head *curr;
 	int num = 0;
 
-	LASSERT(cache != NULL);
-
 	if (cache->fci_cache_count < cache->fci_cache_size)
 		return 0;
 
@@ -414,7 +412,7 @@ static int fld_cache_insert_nolock(struct fld_cache *cache,
 		}
 	}
 
-	if (prev == NULL)
+	if (!prev)
 		prev = head;
 
 	CDEBUG(D_INFO, "insert range "DRANGE"\n", PRANGE(&f_new->fce_range));
@@ -499,7 +497,7 @@ int fld_cache_lookup(struct fld_cache *cache,
 	cache->fci_stat.fst_count++;
 	list_for_each_entry(flde, head, fce_list) {
 		if (flde->fce_range.lsr_start > seq) {
-			if (prev != NULL)
+			if (prev)
 				*range = prev->fce_range;
 			break;
 		}
diff --git a/drivers/staging/lustre/lustre/fld/fld_internal.h b/drivers/staging/lustre/lustre/fld/fld_internal.h
index 12eb164..59eabda 100644
--- a/drivers/staging/lustre/lustre/fld/fld_internal.h
+++ b/drivers/staging/lustre/lustre/fld/fld_internal.h
@@ -169,7 +169,7 @@ struct fld_cache_entry
 static inline const char *
 fld_target_name(struct lu_fld_target *tar)
 {
-	if (tar->ft_srv != NULL)
+	if (tar->ft_srv)
 		return tar->ft_srv->lsf_name;
 
 	return (const char *)tar->ft_exp->exp_obd->obd_name;
diff --git a/drivers/staging/lustre/lustre/fld/fld_request.c b/drivers/staging/lustre/lustre/fld/fld_request.c
index d92c01b..222d18d 100644
--- a/drivers/staging/lustre/lustre/fld/fld_request.c
+++ b/drivers/staging/lustre/lustre/fld/fld_request.c
@@ -148,9 +148,9 @@ again:
 		fld->lcf_name, hash, seq, fld->lcf_count);
 
 	list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
-		const char *srv_name = target->ft_srv != NULL  ?
+		const char *srv_name = target->ft_srv ?
 			target->ft_srv->lsf_name : "<null>";
-		const char *exp_name = target->ft_exp != NULL ?
+		const char *exp_name = target->ft_exp ?
 			(char *)target->ft_exp->exp_obd->obd_uuid.uuid :
 			"<null>";
 
@@ -183,13 +183,13 @@ fld_client_get_target(struct lu_client_fld *fld, u64 seq)
 {
 	struct lu_fld_target *target;
 
-	LASSERT(fld->lcf_hash != NULL);
+	LASSERT(fld->lcf_hash);
 
 	spin_lock(&fld->lcf_lock);
 	target = fld->lcf_hash->fh_scan_func(fld, seq);
 	spin_unlock(&fld->lcf_lock);
 
-	if (target != NULL) {
+	if (target) {
 		CDEBUG(D_INFO, "%s: Found target (idx %llu) by seq %#llx\n",
 		       fld->lcf_name, target->ft_idx, seq);
 	}
@@ -207,10 +207,10 @@ int fld_client_add_target(struct lu_client_fld *fld,
 	const char *name;
 	struct lu_fld_target *target, *tmp;
 
-	LASSERT(tar != NULL);
+	LASSERT(tar);
 	name = fld_target_name(tar);
-	LASSERT(name != NULL);
-	LASSERT(tar->ft_srv != NULL || tar->ft_exp != NULL);
+	LASSERT(name);
+	LASSERT(tar->ft_srv || tar->ft_exp);
 
 	if (fld->lcf_flags != LUSTRE_FLD_INIT) {
 		CERROR("%s: Attempt to add target %s (idx %llu) on fly - skip it\n",
@@ -236,7 +236,7 @@ int fld_client_add_target(struct lu_client_fld *fld,
 	}
 
 	target->ft_exp = tar->ft_exp;
-	if (target->ft_exp != NULL)
+	if (target->ft_exp)
 		class_export_get(target->ft_exp);
 	target->ft_srv = tar->ft_srv;
 	target->ft_idx = tar->ft_idx;
@@ -264,7 +264,7 @@ int fld_client_del_target(struct lu_client_fld *fld, __u64 idx)
 			list_del(&target->ft_chain);
 			spin_unlock(&fld->lcf_lock);
 
-			if (target->ft_exp != NULL)
+			if (target->ft_exp)
 				class_export_put(target->ft_exp);
 
 			kfree(target);
@@ -326,8 +326,6 @@ int fld_client_init(struct lu_client_fld *fld,
 	int cache_size, cache_threshold;
 	int rc;
 
-	LASSERT(fld != NULL);
-
 	snprintf(fld->lcf_name, sizeof(fld->lcf_name),
 		 "cli-%s", prefix);
 
@@ -379,13 +377,13 @@ void fld_client_fini(struct lu_client_fld *fld)
 				     &fld->lcf_targets, ft_chain) {
 		fld->lcf_count--;
 		list_del(&target->ft_chain);
-		if (target->ft_exp != NULL)
+		if (target->ft_exp)
 			class_export_put(target->ft_exp);
 		kfree(target);
 	}
 	spin_unlock(&fld->lcf_lock);
 
-	if (fld->lcf_cache != NULL) {
+	if (fld->lcf_cache) {
 		if (!IS_ERR(fld->lcf_cache))
 			fld_cache_fini(fld->lcf_cache);
 		fld->lcf_cache = NULL;
@@ -402,12 +400,12 @@ int fld_client_rpc(struct obd_export *exp,
 	int		    rc;
 	struct obd_import     *imp;
 
-	LASSERT(exp != NULL);
+	LASSERT(exp);
 
 	imp = class_exp2cliimp(exp);
 	req = ptlrpc_request_alloc_pack(imp, &RQF_FLD_QUERY, LUSTRE_MDS_VERSION,
 					FLD_QUERY);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	op = req_capsule_client_get(&req->rq_pill, &RMF_FLD_OPC);
@@ -436,7 +434,7 @@ int fld_client_rpc(struct obd_export *exp,
 		goto out_req;
 
 	prange = req_capsule_server_get(&req->rq_pill, &RMF_FLD_MDFLD);
-	if (prange == NULL) {
+	if (!prange) {
 		rc = -EFAULT;
 		goto out_req;
 	}
@@ -463,7 +461,7 @@ int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
 
 	/* Can not find it in the cache */
 	target = fld_client_get_target(fld, seq);
-	LASSERT(target != NULL);
+	LASSERT(target);
 
 	CDEBUG(D_INFO, "%s: Lookup fld entry (seq: %#llx) on target %s (idx %llu)\n",
 			fld->lcf_name, seq, fld_target_name(target), target->ft_idx);
diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c b/drivers/staging/lustre/lustre/fld/lproc_fld.c
index 41ceaa8..da31281 100644
--- a/drivers/staging/lustre/lustre/fld/lproc_fld.c
+++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c
@@ -60,8 +60,6 @@ fld_debugfs_targets_seq_show(struct seq_file *m, void *unused)
 	struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
 	struct lu_fld_target *target;
 
-	LASSERT(fld != NULL);
-
 	spin_lock(&fld->lcf_lock);
 	list_for_each_entry(target,
 				&fld->lcf_targets, ft_chain)
@@ -76,8 +74,6 @@ fld_debugfs_hash_seq_show(struct seq_file *m, void *unused)
 {
 	struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
 
-	LASSERT(fld != NULL);
-
 	spin_lock(&fld->lcf_lock);
 	seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
 	spin_unlock(&fld->lcf_lock);
@@ -102,9 +98,8 @@ fld_debugfs_hash_seq_write(struct file *file,
 		return -EFAULT;
 
 	fld = ((struct seq_file *)file->private_data)->private;
-	LASSERT(fld != NULL);
 
-	for (i = 0; fld_hash[i].fh_name != NULL; i++) {
+	for (i = 0; fld_hash[i].fh_name; i++) {
 		if (count != strlen(fld_hash[i].fh_name))
 			continue;
 
@@ -114,7 +109,7 @@ fld_debugfs_hash_seq_write(struct file *file,
 		}
 	}
 
-	if (hash != NULL) {
+	if (hash) {
 		spin_lock(&fld->lcf_lock);
 		fld->lcf_hash = hash;
 		spin_unlock(&fld->lcf_lock);
@@ -132,8 +127,6 @@ fld_debugfs_cache_flush_write(struct file *file, const char __user *buffer,
 {
 	struct lu_client_fld *fld = file->private_data;
 
-	LASSERT(fld != NULL);
-
 	fld_cache_flush(fld->lcf_cache);
 
 	CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
-- 
2.1.0

[PATCH 19/45] staging/lustre/lclient: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lclient/lcommon_cl.c | 32 +++++++++++-----------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lclient/lcommon_cl.c b/drivers/staging/lustre/lustre/lclient/lcommon_cl.c
index 4dfeb4e..efa6e2e 100644
--- a/drivers/staging/lustre/lustre/lclient/lcommon_cl.c
+++ b/drivers/staging/lustre/lustre/lclient/lcommon_cl.c
@@ -117,7 +117,7 @@ void *ccc_key_init(const struct lu_context *ctx, struct lu_context_key *key)
 	struct ccc_thread_info *info;
 
 	info = kmem_cache_alloc(ccc_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -136,7 +136,7 @@ void *ccc_session_key_init(const struct lu_context *ctx,
 	struct ccc_session *session;
 
 	session = kmem_cache_alloc(ccc_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (session == NULL)
+	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;
 }
@@ -173,7 +173,7 @@ int ccc_device_init(const struct lu_env *env, struct lu_device *d,
 	vdv = lu2ccc_dev(d);
 	vdv->cdv_next = lu2cl_dev(next);
 
-	LASSERT(d->ld_site != NULL && next->ld_type != NULL);
+	LASSERT(d->ld_site && next->ld_type);
 	next->ld_site = d->ld_site;
 	rc = next->ld_type->ldt_ops->ldto_device_init(
 			env, next, next->ld_type->ldt_name, NULL);
@@ -211,12 +211,12 @@ struct lu_device *ccc_device_alloc(const struct lu_env *env,
 	vdv->cdv_cl.cd_ops = clops;
 
 	site = kzalloc(sizeof(*site), GFP_NOFS);
-	if (site != NULL) {
+	if (site) {
 		rc = cl_site_init(site, &vdv->cdv_cl);
 		if (rc == 0)
 			rc = lu_site_init_finish(&site->cs_lu);
 		else {
-			LASSERT(lud->ld_site == NULL);
+			LASSERT(!lud->ld_site);
 			CERROR("Cannot init lu_site, rc %d.\n", rc);
 			kfree(site);
 		}
@@ -236,7 +236,7 @@ struct lu_device *ccc_device_free(const struct lu_env *env,
 	struct cl_site    *site = lu2cl_site(d->ld_site);
 	struct lu_device  *next = cl2lu_dev(vdv->cdv_next);
 
-	if (d->ld_site != NULL) {
+	if (d->ld_site) {
 		cl_site_fini(site);
 		kfree(site);
 	}
@@ -252,7 +252,7 @@ int ccc_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	vrq = kmem_cache_alloc(ccc_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (vrq != NULL) {
+	if (vrq) {
 		cl_req_slice_add(req, &vrq->crq_cl, dev, &ccc_req_ops);
 		result = 0;
 	} else
@@ -304,7 +304,7 @@ out_kmem:
 
 void ccc_global_fini(struct lu_device_type *device_type)
 {
-	if (ccc_inode_fini_env != NULL) {
+	if (ccc_inode_fini_env) {
 		cl_env_put(ccc_inode_fini_env, &dummy_refcheck);
 		ccc_inode_fini_env = NULL;
 	}
@@ -328,7 +328,7 @@ struct lu_object *ccc_object_alloc(const struct lu_env *env,
 	struct lu_object  *obj;
 
 	vob = kmem_cache_alloc(ccc_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (vob != NULL) {
+	if (vob) {
 		struct cl_object_header *hdr;
 
 		obj = ccc2lu(vob);
@@ -365,7 +365,7 @@ int ccc_object_init(const struct lu_env *env, struct lu_object *obj,
 
 	under = &dev->cdv_next->cd_lu_dev;
 	below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
-	if (below != NULL) {
+	if (below) {
 		const struct cl_object_conf *cconf;
 
 		cconf = lu2cl_conf(conf);
@@ -397,7 +397,7 @@ int ccc_lock_init(const struct lu_env *env,
 	CLOBINVRNT(env, obj, ccc_object_invariant(obj));
 
 	clk = kmem_cache_alloc(ccc_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (clk != NULL) {
+	if (clk) {
 		cl_lock_slice_add(lock, &clk->clk_cl, obj, lkops);
 		result = 0;
 	} else
@@ -660,7 +660,7 @@ void ccc_io_update_iov(const struct lu_env *env,
 {
 	size_t size = io->u.ci_rw.crw_count;
 
-	if (!cl_is_normalio(env, io) || cio->cui_iter == NULL)
+	if (!cl_is_normalio(env, io) || !cio->cui_iter)
 		return;
 
 	iov_iter_truncate(cio->cui_iter, size);
@@ -749,7 +749,7 @@ int ccc_prep_size(const struct lu_env *env, struct cl_object *obj,
 			 */
 			ccc_object_size_unlock(obj);
 			result = cl_glimpse_lock(env, io, inode, obj, 0);
-			if (result == 0 && exceed != NULL) {
+			if (result == 0 && exceed) {
 				/* If objective page index exceed end-of-file
 				 * page index, return directly. Do not expect
 				 * kernel will check such case correctly.
@@ -1022,7 +1022,7 @@ int cl_file_inode_init(struct inode *inode, struct lustre_md *md)
 	fid  = &lli->lli_fid;
 	LASSERT(fid_is_sane(fid));
 
-	if (lli->lli_clob == NULL) {
+	if (!lli->lli_clob) {
 		/* clob is slave of inode, empty lli_clob means for new inode,
 		 * there is no clob in cache with the given fid, so it is
 		 * unnecessary to perform lookup-alloc-lookup-insert, just
@@ -1098,7 +1098,7 @@ void cl_inode_fini(struct inode *inode)
 	int refcheck;
 	int emergency;
 
-	if (clob != NULL) {
+	if (clob) {
 		void		    *cookie;
 
 		cookie = cl_env_reenter();
@@ -1106,7 +1106,7 @@ void cl_inode_fini(struct inode *inode)
 		emergency = IS_ERR(env);
 		if (emergency) {
 			mutex_lock(&ccc_inode_fini_guard);
-			LASSERT(ccc_inode_fini_env != NULL);
+			LASSERT(ccc_inode_fini_env);
 			cl_env_implant(ccc_inode_fini_env, &refcheck);
 			env = ccc_inode_fini_env;
 		}
-- 
2.1.0

[lustre-devel] [PATCH 19/45] staging/lustre/lclient: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/lclient/lcommon_cl.c | 32 +++++++++++-----------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/lustre/lustre/lclient/lcommon_cl.c b/drivers/staging/lustre/lustre/lclient/lcommon_cl.c
index 4dfeb4e..efa6e2e 100644
--- a/drivers/staging/lustre/lustre/lclient/lcommon_cl.c
+++ b/drivers/staging/lustre/lustre/lclient/lcommon_cl.c
@@ -117,7 +117,7 @@ void *ccc_key_init(const struct lu_context *ctx, struct lu_context_key *key)
 	struct ccc_thread_info *info;
 
 	info = kmem_cache_alloc(ccc_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -136,7 +136,7 @@ void *ccc_session_key_init(const struct lu_context *ctx,
 	struct ccc_session *session;
 
 	session = kmem_cache_alloc(ccc_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (session == NULL)
+	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;
 }
@@ -173,7 +173,7 @@ int ccc_device_init(const struct lu_env *env, struct lu_device *d,
 	vdv = lu2ccc_dev(d);
 	vdv->cdv_next = lu2cl_dev(next);
 
-	LASSERT(d->ld_site != NULL && next->ld_type != NULL);
+	LASSERT(d->ld_site && next->ld_type);
 	next->ld_site = d->ld_site;
 	rc = next->ld_type->ldt_ops->ldto_device_init(
 			env, next, next->ld_type->ldt_name, NULL);
@@ -211,12 +211,12 @@ struct lu_device *ccc_device_alloc(const struct lu_env *env,
 	vdv->cdv_cl.cd_ops = clops;
 
 	site = kzalloc(sizeof(*site), GFP_NOFS);
-	if (site != NULL) {
+	if (site) {
 		rc = cl_site_init(site, &vdv->cdv_cl);
 		if (rc == 0)
 			rc = lu_site_init_finish(&site->cs_lu);
 		else {
-			LASSERT(lud->ld_site == NULL);
+			LASSERT(!lud->ld_site);
 			CERROR("Cannot init lu_site, rc %d.\n", rc);
 			kfree(site);
 		}
@@ -236,7 +236,7 @@ struct lu_device *ccc_device_free(const struct lu_env *env,
 	struct cl_site    *site = lu2cl_site(d->ld_site);
 	struct lu_device  *next = cl2lu_dev(vdv->cdv_next);
 
-	if (d->ld_site != NULL) {
+	if (d->ld_site) {
 		cl_site_fini(site);
 		kfree(site);
 	}
@@ -252,7 +252,7 @@ int ccc_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	vrq = kmem_cache_alloc(ccc_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (vrq != NULL) {
+	if (vrq) {
 		cl_req_slice_add(req, &vrq->crq_cl, dev, &ccc_req_ops);
 		result = 0;
 	} else
@@ -304,7 +304,7 @@ out_kmem:
 
 void ccc_global_fini(struct lu_device_type *device_type)
 {
-	if (ccc_inode_fini_env != NULL) {
+	if (ccc_inode_fini_env) {
 		cl_env_put(ccc_inode_fini_env, &dummy_refcheck);
 		ccc_inode_fini_env = NULL;
 	}
@@ -328,7 +328,7 @@ struct lu_object *ccc_object_alloc(const struct lu_env *env,
 	struct lu_object  *obj;
 
 	vob = kmem_cache_alloc(ccc_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (vob != NULL) {
+	if (vob) {
 		struct cl_object_header *hdr;
 
 		obj = ccc2lu(vob);
@@ -365,7 +365,7 @@ int ccc_object_init(const struct lu_env *env, struct lu_object *obj,
 
 	under = &dev->cdv_next->cd_lu_dev;
 	below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
-	if (below != NULL) {
+	if (below) {
 		const struct cl_object_conf *cconf;
 
 		cconf = lu2cl_conf(conf);
@@ -397,7 +397,7 @@ int ccc_lock_init(const struct lu_env *env,
 	CLOBINVRNT(env, obj, ccc_object_invariant(obj));
 
 	clk = kmem_cache_alloc(ccc_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (clk != NULL) {
+	if (clk) {
 		cl_lock_slice_add(lock, &clk->clk_cl, obj, lkops);
 		result = 0;
 	} else
@@ -660,7 +660,7 @@ void ccc_io_update_iov(const struct lu_env *env,
 {
 	size_t size = io->u.ci_rw.crw_count;
 
-	if (!cl_is_normalio(env, io) || cio->cui_iter == NULL)
+	if (!cl_is_normalio(env, io) || !cio->cui_iter)
 		return;
 
 	iov_iter_truncate(cio->cui_iter, size);
@@ -749,7 +749,7 @@ int ccc_prep_size(const struct lu_env *env, struct cl_object *obj,
 			 */
 			ccc_object_size_unlock(obj);
 			result = cl_glimpse_lock(env, io, inode, obj, 0);
-			if (result == 0 && exceed != NULL) {
+			if (result == 0 && exceed) {
 				/* If objective page index exceed end-of-file
 				 * page index, return directly. Do not expect
 				 * kernel will check such case correctly.
@@ -1022,7 +1022,7 @@ int cl_file_inode_init(struct inode *inode, struct lustre_md *md)
 	fid  = &lli->lli_fid;
 	LASSERT(fid_is_sane(fid));
 
-	if (lli->lli_clob == NULL) {
+	if (!lli->lli_clob) {
 		/* clob is slave of inode, empty lli_clob means for new inode,
 		 * there is no clob in cache with the given fid, so it is
 		 * unnecessary to perform lookup-alloc-lookup-insert, just
@@ -1098,7 +1098,7 @@ void cl_inode_fini(struct inode *inode)
 	int refcheck;
 	int emergency;
 
-	if (clob != NULL) {
+	if (clob) {
 		void		    *cookie;
 
 		cookie = cl_env_reenter();
@@ -1106,7 +1106,7 @@ void cl_inode_fini(struct inode *inode)
 		emergency = IS_ERR(env);
 		if (emergency) {
 			mutex_lock(&ccc_inode_fini_guard);
-			LASSERT(ccc_inode_fini_env != NULL);
+			LASSERT(ccc_inode_fini_env);
 			cl_env_implant(ccc_inode_fini_env, &refcheck);
 			env = ccc_inode_fini_env;
 		}
-- 
2.1.0

[PATCH 20/45] staging/lustre/include: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/cl_object.h  |  6 +--
 drivers/staging/lustre/lustre/include/lclient.h    |  4 +-
 drivers/staging/lustre/lustre/include/linux/obd.h  |  6 +--
 .../staging/lustre/lustre/include/lprocfs_status.h |  6 +--
 drivers/staging/lustre/lustre/include/lu_object.h  |  6 +--
 .../lustre/lustre/include/lustre/lustre_idl.h      |  6 +--
 drivers/staging/lustre/lustre/include/lustre_cfg.h |  5 +--
 drivers/staging/lustre/lustre/include/lustre_dlm.h | 16 +++----
 .../staging/lustre/lustre/include/lustre_export.h  | 11 -----
 drivers/staging/lustre/lustre/include/lustre_lib.h |  8 ++--
 drivers/staging/lustre/lustre/include/lustre_log.h | 12 +++---
 drivers/staging/lustre/lustre/include/lustre_mdc.h | 10 ++---
 drivers/staging/lustre/lustre/include/lustre_net.h | 13 +++---
 drivers/staging/lustre/lustre/include/obd.h        |  7 ++--
 drivers/staging/lustre/lustre/include/obd_class.h  | 49 +++++++++++-----------
 .../staging/lustre/lustre/include/obd_support.h    |  1 -
 16 files changed, 72 insertions(+), 94 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/cl_object.h b/drivers/staging/lustre/lustre/include/cl_object.h
index c8f4569..373e772 100644
--- a/drivers/staging/lustre/lustre/include/cl_object.h
+++ b/drivers/staging/lustre/lustre/include/cl_object.h
@@ -2653,7 +2653,7 @@ static inline int lu_device_is_cl(const struct lu_device *d)
 
 static inline struct cl_device *lu2cl_dev(const struct lu_device *d)
 {
-	LASSERT(d == NULL || IS_ERR(d) || lu_device_is_cl(d));
+	LASSERT(!d || IS_ERR(d) || lu_device_is_cl(d));
 	return container_of0(d, struct cl_device, cd_lu_dev);
 }
 
@@ -2664,7 +2664,7 @@ static inline struct lu_device *cl2lu_dev(struct cl_device *d)
 
 static inline struct cl_object *lu2cl(const struct lu_object *o)
 {
-	LASSERT(o == NULL || IS_ERR(o) || lu_device_is_cl(o->lo_dev));
+	LASSERT(!o || IS_ERR(o) || lu_device_is_cl(o->lo_dev));
 	return container_of0(o, struct cl_object, co_lu);
 }
 
@@ -2681,7 +2681,7 @@ static inline struct cl_object *cl_object_next(const struct cl_object *obj)
 
 static inline struct cl_device *cl_object_device(const struct cl_object *o)
 {
-	LASSERT(o == NULL || IS_ERR(o) || lu_device_is_cl(o->co_lu.lo_dev));
+	LASSERT(!o || IS_ERR(o) || lu_device_is_cl(o->co_lu.lo_dev));
 	return container_of0(o->co_lu.lo_dev, struct cl_device, cd_lu_dev);
 }
 
diff --git a/drivers/staging/lustre/lustre/include/lclient.h b/drivers/staging/lustre/lustre/include/lclient.h
index 36e7a67..7f0a045 100644
--- a/drivers/staging/lustre/lustre/include/lclient.h
+++ b/drivers/staging/lustre/lustre/include/lclient.h
@@ -127,7 +127,7 @@ static inline struct ccc_thread_info *ccc_env_info(const struct lu_env *env)
 	struct ccc_thread_info      *info;
 
 	info = lu_context_key_get(&env->le_ctx, &ccc_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -156,7 +156,7 @@ static inline struct ccc_session *ccc_env_session(const struct lu_env *env)
 	struct ccc_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &ccc_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
diff --git a/drivers/staging/lustre/lustre/include/linux/obd.h b/drivers/staging/lustre/lustre/include/linux/obd.h
index 468bc28..240947b 100644
--- a/drivers/staging/lustre/lustre/include/linux/obd.h
+++ b/drivers/staging/lustre/lustre/include/linux/obd.h
@@ -73,7 +73,7 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 
 	while (1) {
 		if (spin_trylock(&lock->lock)) {
-			LASSERT(lock->task == NULL);
+			LASSERT(!lock->task);
 			lock->task = current;
 			lock->func = func;
 			lock->line = line;
@@ -85,7 +85,7 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 		    time_before(lock->time + 5 * HZ, jiffies)) {
 			struct task_struct *task = lock->task;
 
-			if (task == NULL)
+			if (!task)
 				continue;
 
 			LCONSOLE_WARN("%s:%d: lock %p was acquired by <%s:%d:%s:%d> for %lu seconds.\n",
@@ -108,7 +108,7 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 
 static inline void client_obd_list_unlock(client_obd_lock_t *lock)
 {
-	LASSERT(lock->task != NULL);
+	LASSERT(lock->task);
 	lock->task = NULL;
 	lock->time = jiffies;
 	spin_unlock(&lock->lock);
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index 97c2d7e..88f754e 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -407,7 +407,7 @@ static inline int lprocfs_stats_lock(struct lprocfs_stats *stats, int opc,
 		} else {
 			unsigned int cpuid = get_cpu();
 
-			if (unlikely(stats->ls_percpu[cpuid] == NULL)) {
+			if (unlikely(!stats->ls_percpu[cpuid])) {
 				rc = lprocfs_stats_alloc_one(stats, cpuid);
 				if (rc < 0) {
 					put_cpu();
@@ -521,11 +521,11 @@ static inline __u64 lprocfs_stats_collector(struct lprocfs_stats *stats,
 	unsigned long flags	= 0;
 	__u64	      ret	= 0;
 
-	LASSERT(stats != NULL);
+	LASSERT(stats);
 
 	num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 	for (i = 0; i < num_cpu; i++) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		ret += lprocfs_read_helper(
 				lprocfs_stats_counter_get(stats, i, idx),
diff --git a/drivers/staging/lustre/lustre/include/lu_object.h b/drivers/staging/lustre/lustre/include/lu_object.h
index 0b22e5e..c1c7aa1 100644
--- a/drivers/staging/lustre/lustre/include/lu_object.h
+++ b/drivers/staging/lustre/lustre/include/lu_object.h
@@ -392,7 +392,7 @@ struct lu_device_type_operations {
 
 static inline int lu_device_is_md(const struct lu_device *d)
 {
-	return ergo(d != NULL, d->ld_type->ldt_tags & LU_DEVICE_MD);
+	return ergo(d, d->ld_type->ldt_tags & LU_DEVICE_MD);
 }
 
 /**
@@ -1119,7 +1119,7 @@ struct lu_context_key {
 		CLASSERT(PAGE_CACHE_SIZE >= sizeof (*value));       \
 								  \
 		value = kzalloc(sizeof(*value), GFP_NOFS);	\
-		if (value == NULL)				\
+		if (!value)				\
 			value = ERR_PTR(-ENOMEM);		 \
 								  \
 		return value;				     \
@@ -1174,7 +1174,7 @@ void  lu_context_key_revive  (struct lu_context_key *key);
 		do {						    \
 			LU_CONTEXT_KEY_INIT(key);		       \
 			key = va_arg(args, struct lu_context_key *);    \
-		} while (key != NULL);				  \
+		} while (key);				  \
 		va_end(args);					   \
 	}
 
diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index b064b58..c646426 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -807,7 +807,7 @@ static inline void fid_be_to_cpu(struct lu_fid *dst, const struct lu_fid *src)
 
 static inline int fid_is_sane(const struct lu_fid *fid)
 {
-	return fid != NULL &&
+	return fid &&
 	       ((fid_seq(fid) >= FID_SEQ_START && fid_ver(fid) == 0) ||
 		fid_is_igif(fid) || fid_is_idif(fid) ||
 		fid_seq_is_rsvd(fid_seq(fid)));
@@ -3273,7 +3273,7 @@ static inline void lustre_set_wire_obdo(struct obd_connect_data *ocd,
 {
 	*wobdo = *lobdo;
 	wobdo->o_flags &= ~OBD_FL_LOCAL_MASK;
-	if (ocd == NULL)
+	if (!ocd)
 		return;
 
 	if (unlikely(!(ocd->ocd_connect_flags & OBD_CONNECT_FID)) &&
@@ -3300,7 +3300,7 @@ static inline void lustre_get_wire_obdo(struct obd_connect_data *ocd,
 		lobdo->o_flags &= ~OBD_FL_LOCAL_MASK;
 		lobdo->o_flags |= local_flags;
 	}
-	if (ocd == NULL)
+	if (!ocd)
 		return;
 
 	if (unlikely(!(ocd->ocd_connect_flags & OBD_CONNECT_FID)) &&
diff --git a/drivers/staging/lustre/lustre/include/lustre_cfg.h b/drivers/staging/lustre/lustre/include/lustre_cfg.h
index d30d8b0..1bc35c4 100644
--- a/drivers/staging/lustre/lustre/include/lustre_cfg.h
+++ b/drivers/staging/lustre/lustre/include/lustre_cfg.h
@@ -128,7 +128,7 @@ static inline void lustre_cfg_bufs_set(struct lustre_cfg_bufs *bufs,
 {
 	if (index >= LUSTRE_CFG_MAX_BUFCOUNT)
 		return;
-	if (bufs == NULL)
+	if (!bufs)
 		return;
 
 	if (bufs->lcfg_bufcount <= index)
@@ -158,7 +158,6 @@ static inline void *lustre_cfg_buf(struct lustre_cfg *lcfg, int index)
 	int offset;
 	int bufcount;
 
-	LASSERT (lcfg != NULL);
 	LASSERT (index >= 0);
 
 	bufcount = lcfg->lcfg_bufcount;
@@ -191,7 +190,7 @@ static inline char *lustre_cfg_string(struct lustre_cfg *lcfg, int index)
 		return NULL;
 
 	s = lustre_cfg_buf(lcfg, index);
-	if (s == NULL)
+	if (!s)
 		return NULL;
 
 	/*
diff --git a/drivers/staging/lustre/lustre/include/lustre_dlm.h b/drivers/staging/lustre/lustre/include/lustre_dlm.h
index 11a841a..51f416d 100644
--- a/drivers/staging/lustre/lustre/include/lustre_dlm.h
+++ b/drivers/staging/lustre/lustre/include/lustre_dlm.h
@@ -465,7 +465,6 @@ struct ldlm_namespace {
  */
 static inline int ns_connect_cancelset(struct ldlm_namespace *ns)
 {
-	LASSERT(ns != NULL);
 	return !!(ns->ns_connect_flags & OBD_CONNECT_CANCELSET);
 }
 
@@ -474,14 +473,12 @@ static inline int ns_connect_cancelset(struct ldlm_namespace *ns)
  */
 static inline int ns_connect_lru_resize(struct ldlm_namespace *ns)
 {
-	LASSERT(ns != NULL);
 	return !!(ns->ns_connect_flags & OBD_CONNECT_LRU_RESIZE);
 }
 
 static inline void ns_register_cancel(struct ldlm_namespace *ns,
 				      ldlm_cancel_for_recovery arg)
 {
-	LASSERT(ns != NULL);
 	ns->ns_cancel_for_recovery = arg;
 }
 
@@ -921,7 +918,7 @@ static inline int ldlm_lvbo_init(struct ldlm_resource *res)
 {
 	struct ldlm_namespace *ns = ldlm_res_to_ns(res);
 
-	if (ns->ns_lvbo != NULL && ns->ns_lvbo->lvbo_init != NULL)
+	if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init)
 		return ns->ns_lvbo->lvbo_init(res);
 
 	return 0;
@@ -931,7 +928,7 @@ static inline int ldlm_lvbo_size(struct ldlm_lock *lock)
 {
 	struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 
-	if (ns->ns_lvbo != NULL && ns->ns_lvbo->lvbo_size != NULL)
+	if (ns->ns_lvbo && ns->ns_lvbo->lvbo_size)
 		return ns->ns_lvbo->lvbo_size(lock);
 
 	return 0;
@@ -941,10 +938,9 @@ static inline int ldlm_lvbo_fill(struct ldlm_lock *lock, void *buf, int len)
 {
 	struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 
-	if (ns->ns_lvbo != NULL) {
-		LASSERT(ns->ns_lvbo->lvbo_fill != NULL);
+	if (ns->ns_lvbo)
 		return ns->ns_lvbo->lvbo_fill(lock, buf, len);
-	}
+
 	return 0;
 }
 
@@ -1015,7 +1011,7 @@ void _ldlm_lock_debug(struct ldlm_lock *lock,
 
 /** Non-rate-limited lock printing function for debugging purposes. */
 #define LDLM_DEBUG(lock, fmt, a...)   do {				  \
-	if (likely(lock != NULL)) {					    \
+	if (likely(lock)) {						    \
 		LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_DLMTRACE, NULL);      \
 		ldlm_lock_debug(&msgdata, D_DLMTRACE, NULL, lock,	    \
 				"### " fmt, ##a);			    \
@@ -1091,7 +1087,7 @@ ldlm_handle2lock_long(const struct lustre_handle *h, __u64 flags)
 	struct ldlm_lock *lock;
 
 	lock = __ldlm_handle2lock(h, flags);
-	if (lock != NULL)
+	if (lock)
 		LDLM_LOCK_REF_DEL(lock);
 	return lock;
 }
diff --git a/drivers/staging/lustre/lustre/include/lustre_export.h b/drivers/staging/lustre/lustre/include/lustre_export.h
index a030a98f..86f91ce 100644
--- a/drivers/staging/lustre/lustre/include/lustre_export.h
+++ b/drivers/staging/lustre/lustre/include/lustre_export.h
@@ -228,7 +228,6 @@ static inline __u64 exp_connect_flags(struct obd_export *exp)
 
 static inline int exp_max_brw_size(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	if (exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE)
 		return exp->exp_connect_data.ocd_brw_size;
 
@@ -242,19 +241,16 @@ static inline int exp_connect_multibulk(struct obd_export *exp)
 
 static inline int exp_connect_cancelset(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET);
 }
 
 static inline int exp_connect_lru_resize(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE);
 }
 
 static inline int exp_connect_rmtclient(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_RMT_CLIENT);
 }
 
@@ -268,14 +264,11 @@ static inline int client_is_remote(struct obd_export *exp)
 
 static inline int exp_connect_vbr(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
-	LASSERT(exp->exp_connection);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR);
 }
 
 static inline int exp_connect_som(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_SOM);
 }
 
@@ -288,7 +281,6 @@ static inline int imp_connect_lru_resize(struct obd_import *imp)
 {
 	struct obd_connect_data *ocd;
 
-	LASSERT(imp != NULL);
 	ocd = &imp->imp_connect_data;
 	return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
 }
@@ -300,7 +292,6 @@ static inline int exp_connect_layout(struct obd_export *exp)
 
 static inline bool exp_connect_lvb_type(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	if (exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE)
 		return true;
 	else
@@ -311,7 +302,6 @@ static inline bool imp_connect_lvb_type(struct obd_import *imp)
 {
 	struct obd_connect_data *ocd;
 
-	LASSERT(imp != NULL);
 	ocd = &imp->imp_connect_data;
 	if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE)
 		return true;
@@ -331,7 +321,6 @@ static inline bool imp_connect_disp_stripe(struct obd_import *imp)
 {
 	struct obd_connect_data *ocd;
 
-	LASSERT(imp != NULL);
 	ocd = &imp->imp_connect_data;
 	return ocd->ocd_connect_flags & OBD_CONNECT_DISP_STRIPE;
 }
diff --git a/drivers/staging/lustre/lustre/include/lustre_lib.h b/drivers/staging/lustre/lustre/include/lustre_lib.h
index cfccf7c..8f821df 100644
--- a/drivers/staging/lustre/lustre/include/lustre_lib.h
+++ b/drivers/staging/lustre/lustre/include/lustre_lib.h
@@ -540,7 +540,7 @@ do {									   \
 	l_add_wait(&wq, &__wait);					      \
 									       \
 	/* Block all signals (just the non-fatal ones if no timeout). */       \
-	if (info->lwi_on_signal != NULL && (__timeout == 0 || __allow_intr))   \
+	if (info->lwi_on_signal && (__timeout == 0 || __allow_intr))   \
 		__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS);	      \
 	else								   \
 		__blocked = cfs_block_sigsinv(0);			      \
@@ -562,13 +562,13 @@ do {									   \
 			__timeout = cfs_time_sub(__timeout,		    \
 					    cfs_time_sub(interval, remaining));\
 			if (__timeout == 0) {				  \
-				if (info->lwi_on_timeout == NULL ||	    \
+				if (!info->lwi_on_timeout ||		      \
 				    info->lwi_on_timeout(info->lwi_cb_data)) { \
 					ret = -ETIMEDOUT;		      \
 					break;				 \
 				}					      \
 				/* Take signals after the timeout expires. */  \
-				if (info->lwi_on_signal != NULL)	       \
+				if (info->lwi_on_signal)		       \
 				    (void)cfs_block_sigsinv(LUSTRE_FATAL_SIGS);\
 			}						      \
 		}							      \
@@ -578,7 +578,7 @@ do {									   \
 		if (condition)						 \
 			break;						 \
 		if (cfs_signal_pending()) {				    \
-			if (info->lwi_on_signal != NULL &&		     \
+			if (info->lwi_on_signal &&		     \
 			    (__timeout == 0 || __allow_intr)) {		\
 				if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
 					info->lwi_on_signal(info->lwi_cb_data);\
diff --git a/drivers/staging/lustre/lustre/include/lustre_log.h b/drivers/staging/lustre/lustre/include/lustre_log.h
index e4fc8b5..155a0e6 100644
--- a/drivers/staging/lustre/lustre/include/lustre_log.h
+++ b/drivers/staging/lustre/lustre/include/lustre_log.h
@@ -255,7 +255,7 @@ struct llog_ctxt {
 static inline int llog_handle2ops(struct llog_handle *loghandle,
 				  struct llog_operations **lop)
 {
-	if (loghandle == NULL || loghandle->lgh_logops == NULL)
+	if (!loghandle || !loghandle->lgh_logops)
 		return -EINVAL;
 
 	*lop = loghandle->lgh_logops;
@@ -272,7 +272,7 @@ static inline struct llog_ctxt *llog_ctxt_get(struct llog_ctxt *ctxt)
 
 static inline void llog_ctxt_put(struct llog_ctxt *ctxt)
 {
-	if (ctxt == NULL)
+	if (!ctxt)
 		return;
 	LASSERT_ATOMIC_GT_LT(&ctxt->loc_refcount, 0, LI_POISON);
 	CDEBUG(D_INFO, "PUTting ctxt %p : new refcount %d\n", ctxt,
@@ -294,7 +294,7 @@ static inline int llog_group_set_ctxt(struct obd_llog_group *olg,
 	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
 
 	spin_lock(&olg->olg_lock);
-	if (olg->olg_ctxts[index] != NULL) {
+	if (olg->olg_ctxts[index]) {
 		spin_unlock(&olg->olg_lock);
 		return -EEXIST;
 	}
@@ -311,7 +311,7 @@ static inline struct llog_ctxt *llog_group_get_ctxt(struct obd_llog_group *olg,
 	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
 
 	spin_lock(&olg->olg_lock);
-	if (olg->olg_ctxts[index] == NULL)
+	if (!olg->olg_ctxts[index])
 		ctxt = NULL;
 	else
 		ctxt = llog_ctxt_get(olg->olg_ctxts[index]);
@@ -335,7 +335,7 @@ static inline struct llog_ctxt *llog_get_context(struct obd_device *obd,
 
 static inline int llog_group_ctxt_null(struct obd_llog_group *olg, int index)
 {
-	return (olg->olg_ctxts[index] == NULL);
+	return (!olg->olg_ctxts[index]);
 }
 
 static inline int llog_ctxt_null(struct obd_device *obd, int index)
@@ -354,7 +354,7 @@ static inline int llog_next_block(const struct lu_env *env,
 	rc = llog_handle2ops(loghandle, &lop);
 	if (rc)
 		return rc;
-	if (lop->lop_next_block == NULL)
+	if (!lop->lop_next_block)
 		return -EOPNOTSUPP;
 
 	rc = lop->lop_next_block(env, loghandle, cur_idx, next_idx,
diff --git a/drivers/staging/lustre/lustre/include/lustre_mdc.h b/drivers/staging/lustre/lustre/include/lustre_mdc.h
index 3da3733..db46004 100644
--- a/drivers/staging/lustre/lustre/include/lustre_mdc.h
+++ b/drivers/staging/lustre/lustre/include/lustre_mdc.h
@@ -81,8 +81,8 @@ static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
 static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
 				    struct lookup_intent *it)
 {
-	if (it != NULL && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
-			   it->it_op == IT_LAYOUT))
+	if (it && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
+		   it->it_op == IT_LAYOUT))
 		return;
 
 	/* This would normally block until the existing request finishes.
@@ -112,15 +112,15 @@ static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
 		goto again;
 	}
 
-	LASSERT(lck->rpcl_it == NULL);
+	LASSERT(!lck->rpcl_it);
 	lck->rpcl_it = it;
 }
 
 static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
 				    struct lookup_intent *it)
 {
-	if (it != NULL && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
-			   it->it_op == IT_LAYOUT))
+	if (it && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
+		   it->it_op == IT_LAYOUT))
 		return;
 
 	if (lck->rpcl_it == MDC_FAKE_RPCL_IT) { /* OBD_FAIL_MDC_RPCS_SEM */
diff --git a/drivers/staging/lustre/lustre/include/lustre_net.h b/drivers/staging/lustre/lustre/include/lustre_net.h
index d9c7267..c4a0b00 100644
--- a/drivers/staging/lustre/lustre/include/lustre_net.h
+++ b/drivers/staging/lustre/lustre/include/lustre_net.h
@@ -1518,7 +1518,7 @@ struct ptlrpc_request {
 static inline int ptlrpc_req_interpret(const struct lu_env *env,
 				       struct ptlrpc_request *req, int rc)
 {
-	if (req->rq_interpret_reply != NULL) {
+	if (req->rq_interpret_reply) {
 		req->rq_status = req->rq_interpret_reply(env, req,
 							 &req->rq_async_args,
 							 rc);
@@ -2141,8 +2141,8 @@ struct ptlrpc_service_part {
 #define ptlrpc_service_for_each_part(part, i, svc)			\
 	for (i = 0;							\
 	     i < (svc)->srv_ncpts &&					\
-	     (svc)->srv_parts != NULL &&				\
-	     ((part) = (svc)->srv_parts[i]) != NULL; i++)
+	     (svc)->srv_parts &&					\
+	     ((part) = (svc)->srv_parts[i]); i++)
 
 /**
  * Declaration of ptlrpcd control structure
@@ -2259,7 +2259,6 @@ static inline bool nrs_policy_compat_all(const struct ptlrpc_service *svc,
 static inline bool nrs_policy_compat_one(const struct ptlrpc_service *svc,
 					 const struct ptlrpc_nrs_pol_desc *desc)
 {
-	LASSERT(desc->pd_compat_svc_name != NULL);
 	return strcmp(svc->srv_name, desc->pd_compat_svc_name) == 0;
 }
 
@@ -2303,7 +2302,6 @@ static inline int ptlrpc_client_bulk_active(struct ptlrpc_request *req)
 	struct ptlrpc_bulk_desc *desc;
 	int		      rc;
 
-	LASSERT(req != NULL);
 	desc = req->rq_bulk;
 
 	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) &&
@@ -2726,7 +2724,7 @@ ptlrpc_client_recv_or_unlink(struct ptlrpc_request *req)
 static inline void
 ptlrpc_client_wake_req(struct ptlrpc_request *req)
 {
-	if (req->rq_set == NULL)
+	if (!req->rq_set)
 		wake_up(&req->rq_reply_waitq);
 	else
 		wake_up(&req->rq_set->set_waitq);
@@ -2750,7 +2748,7 @@ ptlrpc_rs_decref(struct ptlrpc_reply_state *rs)
 /* Should only be called once per req */
 static inline void ptlrpc_req_drop_rs(struct ptlrpc_request *req)
 {
-	if (req->rq_reply_state == NULL)
+	if (!req->rq_reply_state)
 		return; /* shouldn't occur */
 	ptlrpc_rs_decref(req->rq_reply_state);
 	req->rq_reply_state = NULL;
@@ -2807,7 +2805,6 @@ ptlrpc_server_get_timeout(struct ptlrpc_service_part *svcpt)
 static inline struct ptlrpc_service *
 ptlrpc_req2svc(struct ptlrpc_request *req)
 {
-	LASSERT(req->rq_rqbd != NULL);
 	return req->rq_rqbd->rqbd_svcpt->scp_service;
 }
 
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index c64a499..2245359 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -123,7 +123,7 @@ static inline bool lsm_is_released(struct lov_stripe_md *lsm)
 
 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
 {
-	if (lsm == NULL)
+	if (!lsm)
 		return false;
 	if (lsm_is_released(lsm))
 		return false;
@@ -1224,7 +1224,7 @@ static inline struct md_open_data *obd_mod_alloc(void)
 	struct md_open_data *mod;
 
 	mod = kzalloc(sizeof(*mod), GFP_NOFS);
-	if (mod == NULL)
+	if (!mod)
 		return NULL;
 	atomic_set(&mod->mod_refcount, 1);
 	return mod;
@@ -1271,7 +1271,7 @@ static inline bool filename_is_volatile(const char *name, int namelen, int *idx)
 		return false;
 
 	/* caller does not care of idx */
-	if (idx == NULL)
+	if (!idx)
 		return true;
 
 	/* volatile file, the MDT can be set from name */
@@ -1306,7 +1306,6 @@ bad_format:
 
 static inline int cli_brw_size(struct obd_device *obd)
 {
-	LASSERT(obd != NULL);
 	return obd->u.cli.cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
 }
 
diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index 4f631e6..a4d3600 100644
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -306,7 +306,7 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	 / sizeof(((struct obd_ops *)(0))->iocontrol))
 
 #define OBD_COUNTER_INCREMENT(obdx, op)			   \
-	if ((obdx)->obd_stats != NULL) {			  \
+	if ((obdx)->obd_stats) {				  \
 		unsigned int coffset;			     \
 		coffset = (unsigned int)((obdx)->obd_cntr_base) + \
 			OBD_COUNTER_OFFSET(op);		   \
@@ -315,7 +315,7 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	}
 
 #define EXP_COUNTER_INCREMENT(export, op)				    \
-	if ((export)->exp_obd->obd_stats != NULL) {			  \
+	if ((export)->exp_obd->obd_stats) {			  \
 		unsigned int coffset;					\
 		coffset = (unsigned int)((export)->exp_obd->obd_cntr_base) + \
 			OBD_COUNTER_OFFSET(op);			      \
@@ -329,7 +329,7 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	 / sizeof(((struct md_ops *)(0))->getstatus))
 
 #define MD_COUNTER_INCREMENT(obdx, op)			   \
-	if ((obd)->md_stats != NULL) {			   \
+	if ((obd)->md_stats) {			   \
 		unsigned int coffset;			    \
 		coffset = (unsigned int)((obdx)->md_cntr_base) + \
 			MD_COUNTER_OFFSET(op);		   \
@@ -338,24 +338,24 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	}
 
 #define EXP_MD_COUNTER_INCREMENT(export, op)				 \
-	if ((export)->exp_obd->obd_stats != NULL) {			  \
+	if ((export)->exp_obd->obd_stats) {				  \
 		unsigned int coffset;					\
 		coffset = (unsigned int)((export)->exp_obd->md_cntr_base) +  \
 			MD_COUNTER_OFFSET(op);			       \
 		LASSERT(coffset < (export)->exp_obd->md_stats->ls_num);      \
 		lprocfs_counter_incr((export)->exp_obd->md_stats, coffset);  \
-		if ((export)->exp_md_stats != NULL)			  \
+		if ((export)->exp_md_stats)				  \
 			lprocfs_counter_incr(				\
 				(export)->exp_md_stats, coffset);	    \
 	}
 
 #define EXP_CHECK_MD_OP(exp, op)				\
 do {							    \
-	if ((exp) == NULL) {				    \
+	if (!(exp)) {				    \
 		CERROR("obd_" #op ": NULL export\n");	   \
 		return -ENODEV;				\
 	}						       \
-	if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
+	if (!(exp)->exp_obd || !OBT((exp)->exp_obd)) {   \
 		CERROR("obd_" #op ": cleaned up obd\n");	\
 		return -EOPNOTSUPP;			    \
 	}						       \
@@ -379,11 +379,11 @@ do {							    \
 
 #define EXP_CHECK_DT_OP(exp, op)				\
 do {							    \
-	if ((exp) == NULL) {				    \
+	if (!(exp)) {				    \
 		CERROR("obd_" #op ": NULL export\n");	   \
 		return -ENODEV;				\
 	}						       \
-	if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
+	if (!(exp)->exp_obd || !OBT((exp)->exp_obd)) {   \
 		CERROR("obd_" #op ": cleaned up obd\n");	\
 		return -EOPNOTSUPP;			    \
 	}						       \
@@ -467,7 +467,7 @@ static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 	DECLARE_LU_VARS(ldt, d);
 
 	ldt = obd->obd_type->typ_lu;
-	if (ldt != NULL) {
+	if (ldt) {
 		struct lu_context  session_ctx;
 		struct lu_env env;
 
@@ -509,7 +509,7 @@ static inline int obd_precleanup(struct obd_device *obd,
 		return rc;
 	ldt = obd->obd_type->typ_lu;
 	d = obd->obd_lu_dev;
-	if (ldt != NULL && d != NULL) {
+	if (ldt && d) {
 		if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 			struct lu_env env;
 
@@ -538,7 +538,7 @@ static inline int obd_cleanup(struct obd_device *obd)
 
 	ldt = obd->obd_type->typ_lu;
 	d = obd->obd_lu_dev;
-	if (ldt != NULL && d != NULL) {
+	if (ldt && d) {
 		struct lu_env env;
 
 		rc = lu_env_init(&env, ldt->ldt_ctx_tags);
@@ -586,7 +586,7 @@ obd_process_config(struct obd_device *obd, int datalen, void *data)
 	obd->obd_process_conf = 1;
 	ldt = obd->obd_type->typ_lu;
 	d = obd->obd_lu_dev;
-	if (ldt != NULL && d != NULL) {
+	if (ldt && d) {
 		struct lu_env env;
 
 		rc = lu_env_init(&env, ldt->ldt_ctx_tags);
@@ -674,7 +674,7 @@ static inline int obd_alloc_memmd(struct obd_export *exp,
 				  struct lov_stripe_md **mem_tgt)
 {
 	LASSERT(mem_tgt);
-	LASSERT(*mem_tgt == NULL);
+	LASSERT(!*mem_tgt);
 	return obd_unpackmd(exp, mem_tgt, NULL, 0);
 }
 
@@ -767,7 +767,7 @@ static inline int obd_setattr_rqset(struct obd_export *exp,
 	EXP_COUNTER_INCREMENT(exp, setattr_async);
 
 	set =  ptlrpc_prep_set();
-	if (set == NULL)
+	if (!set)
 		return -ENOMEM;
 
 	rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
@@ -858,7 +858,7 @@ static inline int obd_connect(const struct lu_env *env,
 
 	rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 	/* check that only subset is granted */
-	LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
+	LASSERT(ergo(data, (data->ocd_connect_flags & ocf) ==
 				    data->ocd_connect_flags));
 	return rc;
 }
@@ -882,8 +882,7 @@ static inline int obd_reconnect(const struct lu_env *env,
 
 	rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 	/* check that only subset is granted */
-	LASSERT(ergo(d != NULL,
-		     (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
+	LASSERT(ergo(d, (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 	return rc;
 }
 
@@ -998,7 +997,7 @@ static inline int obd_init_export(struct obd_export *exp)
 {
 	int rc = 0;
 
-	if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
+	if ((exp)->exp_obd && OBT((exp)->exp_obd) &&
 	    OBP((exp)->exp_obd, init_export))
 		rc = OBP(exp->exp_obd, init_export)(exp);
 	return rc;
@@ -1006,7 +1005,7 @@ static inline int obd_init_export(struct obd_export *exp)
 
 static inline int obd_destroy_export(struct obd_export *exp)
 {
-	if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
+	if ((exp)->exp_obd && OBT((exp)->exp_obd) &&
 	    OBP((exp)->exp_obd, destroy_export))
 		OBP(exp->exp_obd, destroy_export)(exp);
 	return 0;
@@ -1023,7 +1022,7 @@ static inline int obd_statfs_async(struct obd_export *exp,
 	int rc = 0;
 	struct obd_device *obd;
 
-	if (exp == NULL || exp->exp_obd == NULL)
+	if (!exp || !exp->exp_obd)
 		return -EINVAL;
 
 	obd = exp->exp_obd;
@@ -1059,7 +1058,7 @@ static inline int obd_statfs_rqset(struct obd_export *exp,
 	int rc = 0;
 
 	set =  ptlrpc_prep_set();
-	if (set == NULL)
+	if (!set)
 		return -ENOMEM;
 
 	oinfo.oi_osfs = osfs;
@@ -1081,7 +1080,7 @@ static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
 	int rc = 0;
 	struct obd_device *obd = exp->exp_obd;
 
-	if (obd == NULL)
+	if (!obd)
 		return -EINVAL;
 
 	OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
@@ -1241,7 +1240,7 @@ static inline int obd_notify_observer(struct obd_device *observer,
 	 * Also, call non-obd listener, if any
 	 */
 	onu = &observer->obd_upcall;
-	if (onu->onu_upcall != NULL)
+	if (onu->onu_upcall)
 		rc2 = onu->onu_upcall(observer, observed, ev,
 				      onu->onu_owner, NULL);
 	else
@@ -1287,7 +1286,7 @@ static inline int obd_health_check(const struct lu_env *env,
 	int rc;
 
 	/* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
-	if (obd == NULL || !OBT(obd)) {
+	if (!obd || !OBT(obd)) {
 		CERROR("cleaned up obd\n");
 		return -EOPNOTSUPP;
 	}
diff --git a/drivers/staging/lustre/lustre/include/obd_support.h b/drivers/staging/lustre/lustre/include/obd_support.h
index d031437..506753c 100644
--- a/drivers/staging/lustre/lustre/include/obd_support.h
+++ b/drivers/staging/lustre/lustre/include/obd_support.h
@@ -507,7 +507,6 @@ extern char obd_jobid_var[];
 do {									      \
 	struct portals_handle *__h = (handle);				      \
 									      \
-	LASSERT(handle != NULL);					      \
 	__h->h_cookie = (unsigned long)(ptr);				      \
 	__h->h_size = (size);						      \
 	call_rcu(&__h->h_rcu, class_handle_free_cb);			      \
-- 
2.1.0

[lustre-devel] [PATCH 20/45] staging/lustre/include: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/cl_object.h  |  6 +--
 drivers/staging/lustre/lustre/include/lclient.h    |  4 +-
 drivers/staging/lustre/lustre/include/linux/obd.h  |  6 +--
 .../staging/lustre/lustre/include/lprocfs_status.h |  6 +--
 drivers/staging/lustre/lustre/include/lu_object.h  |  6 +--
 .../lustre/lustre/include/lustre/lustre_idl.h      |  6 +--
 drivers/staging/lustre/lustre/include/lustre_cfg.h |  5 +--
 drivers/staging/lustre/lustre/include/lustre_dlm.h | 16 +++----
 .../staging/lustre/lustre/include/lustre_export.h  | 11 -----
 drivers/staging/lustre/lustre/include/lustre_lib.h |  8 ++--
 drivers/staging/lustre/lustre/include/lustre_log.h | 12 +++---
 drivers/staging/lustre/lustre/include/lustre_mdc.h | 10 ++---
 drivers/staging/lustre/lustre/include/lustre_net.h | 13 +++---
 drivers/staging/lustre/lustre/include/obd.h        |  7 ++--
 drivers/staging/lustre/lustre/include/obd_class.h  | 49 +++++++++++-----------
 .../staging/lustre/lustre/include/obd_support.h    |  1 -
 16 files changed, 72 insertions(+), 94 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/cl_object.h b/drivers/staging/lustre/lustre/include/cl_object.h
index c8f4569..373e772 100644
--- a/drivers/staging/lustre/lustre/include/cl_object.h
+++ b/drivers/staging/lustre/lustre/include/cl_object.h
@@ -2653,7 +2653,7 @@ static inline int lu_device_is_cl(const struct lu_device *d)
 
 static inline struct cl_device *lu2cl_dev(const struct lu_device *d)
 {
-	LASSERT(d == NULL || IS_ERR(d) || lu_device_is_cl(d));
+	LASSERT(!d || IS_ERR(d) || lu_device_is_cl(d));
 	return container_of0(d, struct cl_device, cd_lu_dev);
 }
 
@@ -2664,7 +2664,7 @@ static inline struct lu_device *cl2lu_dev(struct cl_device *d)
 
 static inline struct cl_object *lu2cl(const struct lu_object *o)
 {
-	LASSERT(o == NULL || IS_ERR(o) || lu_device_is_cl(o->lo_dev));
+	LASSERT(!o || IS_ERR(o) || lu_device_is_cl(o->lo_dev));
 	return container_of0(o, struct cl_object, co_lu);
 }
 
@@ -2681,7 +2681,7 @@ static inline struct cl_object *cl_object_next(const struct cl_object *obj)
 
 static inline struct cl_device *cl_object_device(const struct cl_object *o)
 {
-	LASSERT(o == NULL || IS_ERR(o) || lu_device_is_cl(o->co_lu.lo_dev));
+	LASSERT(!o || IS_ERR(o) || lu_device_is_cl(o->co_lu.lo_dev));
 	return container_of0(o->co_lu.lo_dev, struct cl_device, cd_lu_dev);
 }
 
diff --git a/drivers/staging/lustre/lustre/include/lclient.h b/drivers/staging/lustre/lustre/include/lclient.h
index 36e7a67..7f0a045 100644
--- a/drivers/staging/lustre/lustre/include/lclient.h
+++ b/drivers/staging/lustre/lustre/include/lclient.h
@@ -127,7 +127,7 @@ static inline struct ccc_thread_info *ccc_env_info(const struct lu_env *env)
 	struct ccc_thread_info      *info;
 
 	info = lu_context_key_get(&env->le_ctx, &ccc_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -156,7 +156,7 @@ static inline struct ccc_session *ccc_env_session(const struct lu_env *env)
 	struct ccc_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &ccc_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
diff --git a/drivers/staging/lustre/lustre/include/linux/obd.h b/drivers/staging/lustre/lustre/include/linux/obd.h
index 468bc28..240947b 100644
--- a/drivers/staging/lustre/lustre/include/linux/obd.h
+++ b/drivers/staging/lustre/lustre/include/linux/obd.h
@@ -73,7 +73,7 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 
 	while (1) {
 		if (spin_trylock(&lock->lock)) {
-			LASSERT(lock->task == NULL);
+			LASSERT(!lock->task);
 			lock->task = current;
 			lock->func = func;
 			lock->line = line;
@@ -85,7 +85,7 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 		    time_before(lock->time + 5 * HZ, jiffies)) {
 			struct task_struct *task = lock->task;
 
-			if (task == NULL)
+			if (!task)
 				continue;
 
 			LCONSOLE_WARN("%s:%d: lock %p was acquired by <%s:%d:%s:%d> for %lu seconds.\n",
@@ -108,7 +108,7 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 
 static inline void client_obd_list_unlock(client_obd_lock_t *lock)
 {
-	LASSERT(lock->task != NULL);
+	LASSERT(lock->task);
 	lock->task = NULL;
 	lock->time = jiffies;
 	spin_unlock(&lock->lock);
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index 97c2d7e..88f754e 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -407,7 +407,7 @@ static inline int lprocfs_stats_lock(struct lprocfs_stats *stats, int opc,
 		} else {
 			unsigned int cpuid = get_cpu();
 
-			if (unlikely(stats->ls_percpu[cpuid] == NULL)) {
+			if (unlikely(!stats->ls_percpu[cpuid])) {
 				rc = lprocfs_stats_alloc_one(stats, cpuid);
 				if (rc < 0) {
 					put_cpu();
@@ -521,11 +521,11 @@ static inline __u64 lprocfs_stats_collector(struct lprocfs_stats *stats,
 	unsigned long flags	= 0;
 	__u64	      ret	= 0;
 
-	LASSERT(stats != NULL);
+	LASSERT(stats);
 
 	num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 	for (i = 0; i < num_cpu; i++) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		ret += lprocfs_read_helper(
 				lprocfs_stats_counter_get(stats, i, idx),
diff --git a/drivers/staging/lustre/lustre/include/lu_object.h b/drivers/staging/lustre/lustre/include/lu_object.h
index 0b22e5e..c1c7aa1 100644
--- a/drivers/staging/lustre/lustre/include/lu_object.h
+++ b/drivers/staging/lustre/lustre/include/lu_object.h
@@ -392,7 +392,7 @@ struct lu_device_type_operations {
 
 static inline int lu_device_is_md(const struct lu_device *d)
 {
-	return ergo(d != NULL, d->ld_type->ldt_tags & LU_DEVICE_MD);
+	return ergo(d, d->ld_type->ldt_tags & LU_DEVICE_MD);
 }
 
 /**
@@ -1119,7 +1119,7 @@ struct lu_context_key {
 		CLASSERT(PAGE_CACHE_SIZE >= sizeof (*value));       \
 								  \
 		value = kzalloc(sizeof(*value), GFP_NOFS);	\
-		if (value == NULL)				\
+		if (!value)				\
 			value = ERR_PTR(-ENOMEM);		 \
 								  \
 		return value;				     \
@@ -1174,7 +1174,7 @@ void  lu_context_key_revive  (struct lu_context_key *key);
 		do {						    \
 			LU_CONTEXT_KEY_INIT(key);		       \
 			key = va_arg(args, struct lu_context_key *);    \
-		} while (key != NULL);				  \
+		} while (key);				  \
 		va_end(args);					   \
 	}
 
diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index b064b58..c646426 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -807,7 +807,7 @@ static inline void fid_be_to_cpu(struct lu_fid *dst, const struct lu_fid *src)
 
 static inline int fid_is_sane(const struct lu_fid *fid)
 {
-	return fid != NULL &&
+	return fid &&
 	       ((fid_seq(fid) >= FID_SEQ_START && fid_ver(fid) == 0) ||
 		fid_is_igif(fid) || fid_is_idif(fid) ||
 		fid_seq_is_rsvd(fid_seq(fid)));
@@ -3273,7 +3273,7 @@ static inline void lustre_set_wire_obdo(struct obd_connect_data *ocd,
 {
 	*wobdo = *lobdo;
 	wobdo->o_flags &= ~OBD_FL_LOCAL_MASK;
-	if (ocd == NULL)
+	if (!ocd)
 		return;
 
 	if (unlikely(!(ocd->ocd_connect_flags & OBD_CONNECT_FID)) &&
@@ -3300,7 +3300,7 @@ static inline void lustre_get_wire_obdo(struct obd_connect_data *ocd,
 		lobdo->o_flags &= ~OBD_FL_LOCAL_MASK;
 		lobdo->o_flags |= local_flags;
 	}
-	if (ocd == NULL)
+	if (!ocd)
 		return;
 
 	if (unlikely(!(ocd->ocd_connect_flags & OBD_CONNECT_FID)) &&
diff --git a/drivers/staging/lustre/lustre/include/lustre_cfg.h b/drivers/staging/lustre/lustre/include/lustre_cfg.h
index d30d8b0..1bc35c4 100644
--- a/drivers/staging/lustre/lustre/include/lustre_cfg.h
+++ b/drivers/staging/lustre/lustre/include/lustre_cfg.h
@@ -128,7 +128,7 @@ static inline void lustre_cfg_bufs_set(struct lustre_cfg_bufs *bufs,
 {
 	if (index >= LUSTRE_CFG_MAX_BUFCOUNT)
 		return;
-	if (bufs == NULL)
+	if (!bufs)
 		return;
 
 	if (bufs->lcfg_bufcount <= index)
@@ -158,7 +158,6 @@ static inline void *lustre_cfg_buf(struct lustre_cfg *lcfg, int index)
 	int offset;
 	int bufcount;
 
-	LASSERT (lcfg != NULL);
 	LASSERT (index >= 0);
 
 	bufcount = lcfg->lcfg_bufcount;
@@ -191,7 +190,7 @@ static inline char *lustre_cfg_string(struct lustre_cfg *lcfg, int index)
 		return NULL;
 
 	s = lustre_cfg_buf(lcfg, index);
-	if (s == NULL)
+	if (!s)
 		return NULL;
 
 	/*
diff --git a/drivers/staging/lustre/lustre/include/lustre_dlm.h b/drivers/staging/lustre/lustre/include/lustre_dlm.h
index 11a841a..51f416d 100644
--- a/drivers/staging/lustre/lustre/include/lustre_dlm.h
+++ b/drivers/staging/lustre/lustre/include/lustre_dlm.h
@@ -465,7 +465,6 @@ struct ldlm_namespace {
  */
 static inline int ns_connect_cancelset(struct ldlm_namespace *ns)
 {
-	LASSERT(ns != NULL);
 	return !!(ns->ns_connect_flags & OBD_CONNECT_CANCELSET);
 }
 
@@ -474,14 +473,12 @@ static inline int ns_connect_cancelset(struct ldlm_namespace *ns)
  */
 static inline int ns_connect_lru_resize(struct ldlm_namespace *ns)
 {
-	LASSERT(ns != NULL);
 	return !!(ns->ns_connect_flags & OBD_CONNECT_LRU_RESIZE);
 }
 
 static inline void ns_register_cancel(struct ldlm_namespace *ns,
 				      ldlm_cancel_for_recovery arg)
 {
-	LASSERT(ns != NULL);
 	ns->ns_cancel_for_recovery = arg;
 }
 
@@ -921,7 +918,7 @@ static inline int ldlm_lvbo_init(struct ldlm_resource *res)
 {
 	struct ldlm_namespace *ns = ldlm_res_to_ns(res);
 
-	if (ns->ns_lvbo != NULL && ns->ns_lvbo->lvbo_init != NULL)
+	if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init)
 		return ns->ns_lvbo->lvbo_init(res);
 
 	return 0;
@@ -931,7 +928,7 @@ static inline int ldlm_lvbo_size(struct ldlm_lock *lock)
 {
 	struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 
-	if (ns->ns_lvbo != NULL && ns->ns_lvbo->lvbo_size != NULL)
+	if (ns->ns_lvbo && ns->ns_lvbo->lvbo_size)
 		return ns->ns_lvbo->lvbo_size(lock);
 
 	return 0;
@@ -941,10 +938,9 @@ static inline int ldlm_lvbo_fill(struct ldlm_lock *lock, void *buf, int len)
 {
 	struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
 
-	if (ns->ns_lvbo != NULL) {
-		LASSERT(ns->ns_lvbo->lvbo_fill != NULL);
+	if (ns->ns_lvbo)
 		return ns->ns_lvbo->lvbo_fill(lock, buf, len);
-	}
+
 	return 0;
 }
 
@@ -1015,7 +1011,7 @@ void _ldlm_lock_debug(struct ldlm_lock *lock,
 
 /** Non-rate-limited lock printing function for debugging purposes. */
 #define LDLM_DEBUG(lock, fmt, a...)   do {				  \
-	if (likely(lock != NULL)) {					    \
+	if (likely(lock)) {						    \
 		LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_DLMTRACE, NULL);      \
 		ldlm_lock_debug(&msgdata, D_DLMTRACE, NULL, lock,	    \
 				"### " fmt, ##a);			    \
@@ -1091,7 +1087,7 @@ ldlm_handle2lock_long(const struct lustre_handle *h, __u64 flags)
 	struct ldlm_lock *lock;
 
 	lock = __ldlm_handle2lock(h, flags);
-	if (lock != NULL)
+	if (lock)
 		LDLM_LOCK_REF_DEL(lock);
 	return lock;
 }
diff --git a/drivers/staging/lustre/lustre/include/lustre_export.h b/drivers/staging/lustre/lustre/include/lustre_export.h
index a030a98f..86f91ce 100644
--- a/drivers/staging/lustre/lustre/include/lustre_export.h
+++ b/drivers/staging/lustre/lustre/include/lustre_export.h
@@ -228,7 +228,6 @@ static inline __u64 exp_connect_flags(struct obd_export *exp)
 
 static inline int exp_max_brw_size(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	if (exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE)
 		return exp->exp_connect_data.ocd_brw_size;
 
@@ -242,19 +241,16 @@ static inline int exp_connect_multibulk(struct obd_export *exp)
 
 static inline int exp_connect_cancelset(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_CANCELSET);
 }
 
 static inline int exp_connect_lru_resize(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_LRU_RESIZE);
 }
 
 static inline int exp_connect_rmtclient(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_RMT_CLIENT);
 }
 
@@ -268,14 +264,11 @@ static inline int client_is_remote(struct obd_export *exp)
 
 static inline int exp_connect_vbr(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
-	LASSERT(exp->exp_connection);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_VBR);
 }
 
 static inline int exp_connect_som(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	return !!(exp_connect_flags(exp) & OBD_CONNECT_SOM);
 }
 
@@ -288,7 +281,6 @@ static inline int imp_connect_lru_resize(struct obd_import *imp)
 {
 	struct obd_connect_data *ocd;
 
-	LASSERT(imp != NULL);
 	ocd = &imp->imp_connect_data;
 	return !!(ocd->ocd_connect_flags & OBD_CONNECT_LRU_RESIZE);
 }
@@ -300,7 +292,6 @@ static inline int exp_connect_layout(struct obd_export *exp)
 
 static inline bool exp_connect_lvb_type(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	if (exp_connect_flags(exp) & OBD_CONNECT_LVB_TYPE)
 		return true;
 	else
@@ -311,7 +302,6 @@ static inline bool imp_connect_lvb_type(struct obd_import *imp)
 {
 	struct obd_connect_data *ocd;
 
-	LASSERT(imp != NULL);
 	ocd = &imp->imp_connect_data;
 	if (ocd->ocd_connect_flags & OBD_CONNECT_LVB_TYPE)
 		return true;
@@ -331,7 +321,6 @@ static inline bool imp_connect_disp_stripe(struct obd_import *imp)
 {
 	struct obd_connect_data *ocd;
 
-	LASSERT(imp != NULL);
 	ocd = &imp->imp_connect_data;
 	return ocd->ocd_connect_flags & OBD_CONNECT_DISP_STRIPE;
 }
diff --git a/drivers/staging/lustre/lustre/include/lustre_lib.h b/drivers/staging/lustre/lustre/include/lustre_lib.h
index cfccf7c..8f821df 100644
--- a/drivers/staging/lustre/lustre/include/lustre_lib.h
+++ b/drivers/staging/lustre/lustre/include/lustre_lib.h
@@ -540,7 +540,7 @@ do {									   \
 	l_add_wait(&wq, &__wait);					      \
 									       \
 	/* Block all signals (just the non-fatal ones if no timeout). */       \
-	if (info->lwi_on_signal != NULL && (__timeout == 0 || __allow_intr))   \
+	if (info->lwi_on_signal && (__timeout == 0 || __allow_intr))   \
 		__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS);	      \
 	else								   \
 		__blocked = cfs_block_sigsinv(0);			      \
@@ -562,13 +562,13 @@ do {									   \
 			__timeout = cfs_time_sub(__timeout,		    \
 					    cfs_time_sub(interval, remaining));\
 			if (__timeout == 0) {				  \
-				if (info->lwi_on_timeout == NULL ||	    \
+				if (!info->lwi_on_timeout ||		      \
 				    info->lwi_on_timeout(info->lwi_cb_data)) { \
 					ret = -ETIMEDOUT;		      \
 					break;				 \
 				}					      \
 				/* Take signals after the timeout expires. */  \
-				if (info->lwi_on_signal != NULL)	       \
+				if (info->lwi_on_signal)		       \
 				    (void)cfs_block_sigsinv(LUSTRE_FATAL_SIGS);\
 			}						      \
 		}							      \
@@ -578,7 +578,7 @@ do {									   \
 		if (condition)						 \
 			break;						 \
 		if (cfs_signal_pending()) {				    \
-			if (info->lwi_on_signal != NULL &&		     \
+			if (info->lwi_on_signal &&		     \
 			    (__timeout == 0 || __allow_intr)) {		\
 				if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
 					info->lwi_on_signal(info->lwi_cb_data);\
diff --git a/drivers/staging/lustre/lustre/include/lustre_log.h b/drivers/staging/lustre/lustre/include/lustre_log.h
index e4fc8b5..155a0e6 100644
--- a/drivers/staging/lustre/lustre/include/lustre_log.h
+++ b/drivers/staging/lustre/lustre/include/lustre_log.h
@@ -255,7 +255,7 @@ struct llog_ctxt {
 static inline int llog_handle2ops(struct llog_handle *loghandle,
 				  struct llog_operations **lop)
 {
-	if (loghandle == NULL || loghandle->lgh_logops == NULL)
+	if (!loghandle || !loghandle->lgh_logops)
 		return -EINVAL;
 
 	*lop = loghandle->lgh_logops;
@@ -272,7 +272,7 @@ static inline struct llog_ctxt *llog_ctxt_get(struct llog_ctxt *ctxt)
 
 static inline void llog_ctxt_put(struct llog_ctxt *ctxt)
 {
-	if (ctxt == NULL)
+	if (!ctxt)
 		return;
 	LASSERT_ATOMIC_GT_LT(&ctxt->loc_refcount, 0, LI_POISON);
 	CDEBUG(D_INFO, "PUTting ctxt %p : new refcount %d\n", ctxt,
@@ -294,7 +294,7 @@ static inline int llog_group_set_ctxt(struct obd_llog_group *olg,
 	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
 
 	spin_lock(&olg->olg_lock);
-	if (olg->olg_ctxts[index] != NULL) {
+	if (olg->olg_ctxts[index]) {
 		spin_unlock(&olg->olg_lock);
 		return -EEXIST;
 	}
@@ -311,7 +311,7 @@ static inline struct llog_ctxt *llog_group_get_ctxt(struct obd_llog_group *olg,
 	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
 
 	spin_lock(&olg->olg_lock);
-	if (olg->olg_ctxts[index] == NULL)
+	if (!olg->olg_ctxts[index])
 		ctxt = NULL;
 	else
 		ctxt = llog_ctxt_get(olg->olg_ctxts[index]);
@@ -335,7 +335,7 @@ static inline struct llog_ctxt *llog_get_context(struct obd_device *obd,
 
 static inline int llog_group_ctxt_null(struct obd_llog_group *olg, int index)
 {
-	return (olg->olg_ctxts[index] == NULL);
+	return (!olg->olg_ctxts[index]);
 }
 
 static inline int llog_ctxt_null(struct obd_device *obd, int index)
@@ -354,7 +354,7 @@ static inline int llog_next_block(const struct lu_env *env,
 	rc = llog_handle2ops(loghandle, &lop);
 	if (rc)
 		return rc;
-	if (lop->lop_next_block == NULL)
+	if (!lop->lop_next_block)
 		return -EOPNOTSUPP;
 
 	rc = lop->lop_next_block(env, loghandle, cur_idx, next_idx,
diff --git a/drivers/staging/lustre/lustre/include/lustre_mdc.h b/drivers/staging/lustre/lustre/include/lustre_mdc.h
index 3da3733..db46004 100644
--- a/drivers/staging/lustre/lustre/include/lustre_mdc.h
+++ b/drivers/staging/lustre/lustre/include/lustre_mdc.h
@@ -81,8 +81,8 @@ static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck)
 static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
 				    struct lookup_intent *it)
 {
-	if (it != NULL && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
-			   it->it_op == IT_LAYOUT))
+	if (it && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
+		   it->it_op == IT_LAYOUT))
 		return;
 
 	/* This would normally block until the existing request finishes.
@@ -112,15 +112,15 @@ static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
 		goto again;
 	}
 
-	LASSERT(lck->rpcl_it == NULL);
+	LASSERT(!lck->rpcl_it);
 	lck->rpcl_it = it;
 }
 
 static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck,
 				    struct lookup_intent *it)
 {
-	if (it != NULL && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
-			   it->it_op == IT_LAYOUT))
+	if (it && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
+		   it->it_op == IT_LAYOUT))
 		return;
 
 	if (lck->rpcl_it == MDC_FAKE_RPCL_IT) { /* OBD_FAIL_MDC_RPCS_SEM */
diff --git a/drivers/staging/lustre/lustre/include/lustre_net.h b/drivers/staging/lustre/lustre/include/lustre_net.h
index d9c7267..c4a0b00 100644
--- a/drivers/staging/lustre/lustre/include/lustre_net.h
+++ b/drivers/staging/lustre/lustre/include/lustre_net.h
@@ -1518,7 +1518,7 @@ struct ptlrpc_request {
 static inline int ptlrpc_req_interpret(const struct lu_env *env,
 				       struct ptlrpc_request *req, int rc)
 {
-	if (req->rq_interpret_reply != NULL) {
+	if (req->rq_interpret_reply) {
 		req->rq_status = req->rq_interpret_reply(env, req,
 							 &req->rq_async_args,
 							 rc);
@@ -2141,8 +2141,8 @@ struct ptlrpc_service_part {
 #define ptlrpc_service_for_each_part(part, i, svc)			\
 	for (i = 0;							\
 	     i < (svc)->srv_ncpts &&					\
-	     (svc)->srv_parts != NULL &&				\
-	     ((part) = (svc)->srv_parts[i]) != NULL; i++)
+	     (svc)->srv_parts &&					\
+	     ((part) = (svc)->srv_parts[i]); i++)
 
 /**
  * Declaration of ptlrpcd control structure
@@ -2259,7 +2259,6 @@ static inline bool nrs_policy_compat_all(const struct ptlrpc_service *svc,
 static inline bool nrs_policy_compat_one(const struct ptlrpc_service *svc,
 					 const struct ptlrpc_nrs_pol_desc *desc)
 {
-	LASSERT(desc->pd_compat_svc_name != NULL);
 	return strcmp(svc->srv_name, desc->pd_compat_svc_name) == 0;
 }
 
@@ -2303,7 +2302,6 @@ static inline int ptlrpc_client_bulk_active(struct ptlrpc_request *req)
 	struct ptlrpc_bulk_desc *desc;
 	int		      rc;
 
-	LASSERT(req != NULL);
 	desc = req->rq_bulk;
 
 	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) &&
@@ -2726,7 +2724,7 @@ ptlrpc_client_recv_or_unlink(struct ptlrpc_request *req)
 static inline void
 ptlrpc_client_wake_req(struct ptlrpc_request *req)
 {
-	if (req->rq_set == NULL)
+	if (!req->rq_set)
 		wake_up(&req->rq_reply_waitq);
 	else
 		wake_up(&req->rq_set->set_waitq);
@@ -2750,7 +2748,7 @@ ptlrpc_rs_decref(struct ptlrpc_reply_state *rs)
 /* Should only be called once per req */
 static inline void ptlrpc_req_drop_rs(struct ptlrpc_request *req)
 {
-	if (req->rq_reply_state == NULL)
+	if (!req->rq_reply_state)
 		return; /* shouldn't occur */
 	ptlrpc_rs_decref(req->rq_reply_state);
 	req->rq_reply_state = NULL;
@@ -2807,7 +2805,6 @@ ptlrpc_server_get_timeout(struct ptlrpc_service_part *svcpt)
 static inline struct ptlrpc_service *
 ptlrpc_req2svc(struct ptlrpc_request *req)
 {
-	LASSERT(req->rq_rqbd != NULL);
 	return req->rq_rqbd->rqbd_svcpt->scp_service;
 }
 
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index c64a499..2245359 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -123,7 +123,7 @@ static inline bool lsm_is_released(struct lov_stripe_md *lsm)
 
 static inline bool lsm_has_objects(struct lov_stripe_md *lsm)
 {
-	if (lsm == NULL)
+	if (!lsm)
 		return false;
 	if (lsm_is_released(lsm))
 		return false;
@@ -1224,7 +1224,7 @@ static inline struct md_open_data *obd_mod_alloc(void)
 	struct md_open_data *mod;
 
 	mod = kzalloc(sizeof(*mod), GFP_NOFS);
-	if (mod == NULL)
+	if (!mod)
 		return NULL;
 	atomic_set(&mod->mod_refcount, 1);
 	return mod;
@@ -1271,7 +1271,7 @@ static inline bool filename_is_volatile(const char *name, int namelen, int *idx)
 		return false;
 
 	/* caller does not care of idx */
-	if (idx == NULL)
+	if (!idx)
 		return true;
 
 	/* volatile file, the MDT can be set from name */
@@ -1306,7 +1306,6 @@ bad_format:
 
 static inline int cli_brw_size(struct obd_device *obd)
 {
-	LASSERT(obd != NULL);
 	return obd->u.cli.cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
 }
 
diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index 4f631e6..a4d3600 100644
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -306,7 +306,7 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	 / sizeof(((struct obd_ops *)(0))->iocontrol))
 
 #define OBD_COUNTER_INCREMENT(obdx, op)			   \
-	if ((obdx)->obd_stats != NULL) {			  \
+	if ((obdx)->obd_stats) {				  \
 		unsigned int coffset;			     \
 		coffset = (unsigned int)((obdx)->obd_cntr_base) + \
 			OBD_COUNTER_OFFSET(op);		   \
@@ -315,7 +315,7 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	}
 
 #define EXP_COUNTER_INCREMENT(export, op)				    \
-	if ((export)->exp_obd->obd_stats != NULL) {			  \
+	if ((export)->exp_obd->obd_stats) {			  \
 		unsigned int coffset;					\
 		coffset = (unsigned int)((export)->exp_obd->obd_cntr_base) + \
 			OBD_COUNTER_OFFSET(op);			      \
@@ -329,7 +329,7 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	 / sizeof(((struct md_ops *)(0))->getstatus))
 
 #define MD_COUNTER_INCREMENT(obdx, op)			   \
-	if ((obd)->md_stats != NULL) {			   \
+	if ((obd)->md_stats) {			   \
 		unsigned int coffset;			    \
 		coffset = (unsigned int)((obdx)->md_cntr_base) + \
 			MD_COUNTER_OFFSET(op);		   \
@@ -338,24 +338,24 @@ static inline int obd_check_dev_active(struct obd_device *obd)
 	}
 
 #define EXP_MD_COUNTER_INCREMENT(export, op)				 \
-	if ((export)->exp_obd->obd_stats != NULL) {			  \
+	if ((export)->exp_obd->obd_stats) {				  \
 		unsigned int coffset;					\
 		coffset = (unsigned int)((export)->exp_obd->md_cntr_base) +  \
 			MD_COUNTER_OFFSET(op);			       \
 		LASSERT(coffset < (export)->exp_obd->md_stats->ls_num);      \
 		lprocfs_counter_incr((export)->exp_obd->md_stats, coffset);  \
-		if ((export)->exp_md_stats != NULL)			  \
+		if ((export)->exp_md_stats)				  \
 			lprocfs_counter_incr(				\
 				(export)->exp_md_stats, coffset);	    \
 	}
 
 #define EXP_CHECK_MD_OP(exp, op)				\
 do {							    \
-	if ((exp) == NULL) {				    \
+	if (!(exp)) {				    \
 		CERROR("obd_" #op ": NULL export\n");	   \
 		return -ENODEV;				\
 	}						       \
-	if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
+	if (!(exp)->exp_obd || !OBT((exp)->exp_obd)) {   \
 		CERROR("obd_" #op ": cleaned up obd\n");	\
 		return -EOPNOTSUPP;			    \
 	}						       \
@@ -379,11 +379,11 @@ do {							    \
 
 #define EXP_CHECK_DT_OP(exp, op)				\
 do {							    \
-	if ((exp) == NULL) {				    \
+	if (!(exp)) {				    \
 		CERROR("obd_" #op ": NULL export\n");	   \
 		return -ENODEV;				\
 	}						       \
-	if ((exp)->exp_obd == NULL || !OBT((exp)->exp_obd)) {   \
+	if (!(exp)->exp_obd || !OBT((exp)->exp_obd)) {   \
 		CERROR("obd_" #op ": cleaned up obd\n");	\
 		return -EOPNOTSUPP;			    \
 	}						       \
@@ -467,7 +467,7 @@ static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
 	DECLARE_LU_VARS(ldt, d);
 
 	ldt = obd->obd_type->typ_lu;
-	if (ldt != NULL) {
+	if (ldt) {
 		struct lu_context  session_ctx;
 		struct lu_env env;
 
@@ -509,7 +509,7 @@ static inline int obd_precleanup(struct obd_device *obd,
 		return rc;
 	ldt = obd->obd_type->typ_lu;
 	d = obd->obd_lu_dev;
-	if (ldt != NULL && d != NULL) {
+	if (ldt && d) {
 		if (cleanup_stage == OBD_CLEANUP_EXPORTS) {
 			struct lu_env env;
 
@@ -538,7 +538,7 @@ static inline int obd_cleanup(struct obd_device *obd)
 
 	ldt = obd->obd_type->typ_lu;
 	d = obd->obd_lu_dev;
-	if (ldt != NULL && d != NULL) {
+	if (ldt && d) {
 		struct lu_env env;
 
 		rc = lu_env_init(&env, ldt->ldt_ctx_tags);
@@ -586,7 +586,7 @@ obd_process_config(struct obd_device *obd, int datalen, void *data)
 	obd->obd_process_conf = 1;
 	ldt = obd->obd_type->typ_lu;
 	d = obd->obd_lu_dev;
-	if (ldt != NULL && d != NULL) {
+	if (ldt && d) {
 		struct lu_env env;
 
 		rc = lu_env_init(&env, ldt->ldt_ctx_tags);
@@ -674,7 +674,7 @@ static inline int obd_alloc_memmd(struct obd_export *exp,
 				  struct lov_stripe_md **mem_tgt)
 {
 	LASSERT(mem_tgt);
-	LASSERT(*mem_tgt == NULL);
+	LASSERT(!*mem_tgt);
 	return obd_unpackmd(exp, mem_tgt, NULL, 0);
 }
 
@@ -767,7 +767,7 @@ static inline int obd_setattr_rqset(struct obd_export *exp,
 	EXP_COUNTER_INCREMENT(exp, setattr_async);
 
 	set =  ptlrpc_prep_set();
-	if (set == NULL)
+	if (!set)
 		return -ENOMEM;
 
 	rc = OBP(exp->exp_obd, setattr_async)(exp, oinfo, oti, set);
@@ -858,7 +858,7 @@ static inline int obd_connect(const struct lu_env *env,
 
 	rc = OBP(obd, connect)(env, exp, obd, cluuid, data, localdata);
 	/* check that only subset is granted */
-	LASSERT(ergo(data != NULL, (data->ocd_connect_flags & ocf) ==
+	LASSERT(ergo(data, (data->ocd_connect_flags & ocf) ==
 				    data->ocd_connect_flags));
 	return rc;
 }
@@ -882,8 +882,7 @@ static inline int obd_reconnect(const struct lu_env *env,
 
 	rc = OBP(obd, reconnect)(env, exp, obd, cluuid, d, localdata);
 	/* check that only subset is granted */
-	LASSERT(ergo(d != NULL,
-		     (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
+	LASSERT(ergo(d, (d->ocd_connect_flags & ocf) == d->ocd_connect_flags));
 	return rc;
 }
 
@@ -998,7 +997,7 @@ static inline int obd_init_export(struct obd_export *exp)
 {
 	int rc = 0;
 
-	if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
+	if ((exp)->exp_obd && OBT((exp)->exp_obd) &&
 	    OBP((exp)->exp_obd, init_export))
 		rc = OBP(exp->exp_obd, init_export)(exp);
 	return rc;
@@ -1006,7 +1005,7 @@ static inline int obd_init_export(struct obd_export *exp)
 
 static inline int obd_destroy_export(struct obd_export *exp)
 {
-	if ((exp)->exp_obd != NULL && OBT((exp)->exp_obd) &&
+	if ((exp)->exp_obd && OBT((exp)->exp_obd) &&
 	    OBP((exp)->exp_obd, destroy_export))
 		OBP(exp->exp_obd, destroy_export)(exp);
 	return 0;
@@ -1023,7 +1022,7 @@ static inline int obd_statfs_async(struct obd_export *exp,
 	int rc = 0;
 	struct obd_device *obd;
 
-	if (exp == NULL || exp->exp_obd == NULL)
+	if (!exp || !exp->exp_obd)
 		return -EINVAL;
 
 	obd = exp->exp_obd;
@@ -1059,7 +1058,7 @@ static inline int obd_statfs_rqset(struct obd_export *exp,
 	int rc = 0;
 
 	set =  ptlrpc_prep_set();
-	if (set == NULL)
+	if (!set)
 		return -ENOMEM;
 
 	oinfo.oi_osfs = osfs;
@@ -1081,7 +1080,7 @@ static inline int obd_statfs(const struct lu_env *env, struct obd_export *exp,
 	int rc = 0;
 	struct obd_device *obd = exp->exp_obd;
 
-	if (obd == NULL)
+	if (!obd)
 		return -EINVAL;
 
 	OBD_CHECK_DT_OP(obd, statfs, -EOPNOTSUPP);
@@ -1241,7 +1240,7 @@ static inline int obd_notify_observer(struct obd_device *observer,
 	 * Also, call non-obd listener, if any
 	 */
 	onu = &observer->obd_upcall;
-	if (onu->onu_upcall != NULL)
+	if (onu->onu_upcall)
 		rc2 = onu->onu_upcall(observer, observed, ev,
 				      onu->onu_owner, NULL);
 	else
@@ -1287,7 +1286,7 @@ static inline int obd_health_check(const struct lu_env *env,
 	int rc;
 
 	/* don't use EXP_CHECK_DT_OP, because NULL method is normal here */
-	if (obd == NULL || !OBT(obd)) {
+	if (!obd || !OBT(obd)) {
 		CERROR("cleaned up obd\n");
 		return -EOPNOTSUPP;
 	}
diff --git a/drivers/staging/lustre/lustre/include/obd_support.h b/drivers/staging/lustre/lustre/include/obd_support.h
index d031437..506753c 100644
--- a/drivers/staging/lustre/lustre/include/obd_support.h
+++ b/drivers/staging/lustre/lustre/include/obd_support.h
@@ -507,7 +507,6 @@ extern char obd_jobid_var[];
 do {									      \
 	struct portals_handle *__h = (handle);				      \
 									      \
-	LASSERT(handle != NULL);					      \
 	__h->h_cookie = (unsigned long)(ptr);				      \
 	__h->h_size = (size);						      \
 	call_rcu(&__h->h_rcu, class_handle_free_cb);			      \
-- 
2.1.0

[PATCH 21/45] staging/lustre/mdc: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/mdc/mdc_lib.c     |  12 +--
 drivers/staging/lustre/lustre/mdc/mdc_locks.c   |  47 +++++-----
 drivers/staging/lustre/lustre/mdc/mdc_reint.c   |  24 ++---
 drivers/staging/lustre/lustre/mdc/mdc_request.c | 116 ++++++++++++------------
 4 files changed, 90 insertions(+), 109 deletions(-)

diff --git a/drivers/staging/lustre/lustre/mdc/mdc_lib.c b/drivers/staging/lustre/lustre/mdc/mdc_lib.c
index 7218532..ea2ab23 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_lib.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_lib.c
@@ -41,8 +41,6 @@
 
 static void __mdc_pack_body(struct mdt_body *b, __u32 suppgid)
 {
-	LASSERT(b != NULL);
-
 	b->suppgid = suppgid;
 	b->uid = from_kuid(&init_user_ns, current_uid());
 	b->gid = from_kgid(&init_user_ns, current_gid());
@@ -83,7 +81,6 @@ void mdc_pack_body(struct ptlrpc_request *req, const struct lu_fid *fid,
 {
 	struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
 						    &RMF_MDT_BODY);
-	LASSERT(b != NULL);
 	b->valid = valid;
 	b->eadatasize = ea_size;
 	b->flags = flags;
@@ -323,7 +320,7 @@ void mdc_setattr_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
 		return;
 
 	lum = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
-	if (ea == NULL) { /* Remove LOV EA */
+	if (!ea) { /* Remove LOV EA */
 		lum->lmm_magic = LOV_USER_MAGIC_V1;
 		lum->lmm_stripe_size = 0;
 		lum->lmm_stripe_count = 0;
@@ -346,7 +343,6 @@ void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 
 	CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_unlink));
 	rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
-	LASSERT(rec != NULL);
 
 	rec->ul_opcode   = op_data->op_cli_flags & CLI_RM_ENTRY ?
 					REINT_RMENTRY : REINT_UNLINK;
@@ -362,7 +358,7 @@ void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 	rec->ul_bias     = op_data->op_bias;
 
 	tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
-	LASSERT(tmp != NULL);
+	LASSERT(tmp);
 	LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 }
 
@@ -373,7 +369,6 @@ void mdc_link_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 
 	CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_link));
 	rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
-	LASSERT(rec != NULL);
 
 	rec->lk_opcode   = REINT_LINK;
 	rec->lk_fsuid    = op_data->op_fsuid; /* current->fsuid; */
@@ -456,10 +451,9 @@ static void mdc_hsm_release_pack(struct ptlrpc_request *req,
 		struct ldlm_lock *lock;
 
 		data = req_capsule_client_get(&req->rq_pill, &RMF_CLOSE_DATA);
-		LASSERT(data != NULL);
 
 		lock = ldlm_handle2lock(&op_data->op_lease_handle);
-		if (lock != NULL) {
+		if (lock) {
 			data->cd_handle = lock->l_remote_handle;
 			ldlm_lock_put(lock);
 		}
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_locks.c b/drivers/staging/lustre/lustre/mdc/mdc_locks.c
index ef9a1e1..09dd2b3 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_locks.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_locks.c
@@ -129,7 +129,7 @@ int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
 
 	lock = ldlm_handle2lock((struct lustre_handle *)lockh);
 
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	lock_res_and_lock(lock);
 	if (lock->l_resource->lr_lvb_inode &&
 	    lock->l_resource->lr_lvb_inode != data) {
@@ -191,12 +191,12 @@ int mdc_null_inode(struct obd_export *exp,
 	struct ldlm_resource *res;
 	struct ldlm_namespace *ns = class_exp2obd(exp)->obd_namespace;
 
-	LASSERTF(ns != NULL, "no namespace passed\n");
+	LASSERTF(ns, "no namespace passed\n");
 
 	fid_build_reg_res_name(fid, &res_id);
 
 	res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 
 	lock_res(res);
@@ -317,7 +317,7 @@ static struct ptlrpc_request *mdc_intent_open_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_LDLM_INTENT_OPEN);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return ERR_PTR(-ENOMEM);
 	}
@@ -365,7 +365,7 @@ mdc_intent_getxattr_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					&RQF_LDLM_INTENT_GETXATTR);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
@@ -409,7 +409,7 @@ static struct ptlrpc_request *mdc_intent_unlink_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_LDLM_INTENT_UNLINK);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
@@ -453,7 +453,7 @@ static struct ptlrpc_request *mdc_intent_getattr_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_LDLM_INTENT_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
@@ -497,7 +497,7 @@ static struct ptlrpc_request *mdc_intent_layout_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				&RQF_LDLM_INTENT_LAYOUT);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, 0);
@@ -530,7 +530,7 @@ mdc_enqueue_pack(struct obd_export *exp, int lvb_len)
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
@@ -573,7 +573,6 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 		rc = 0;
 	} else { /* rc = 0 */
 		lock = ldlm_handle2lock(lockh);
-		LASSERT(lock != NULL);
 
 		/* If the server gave us back a different lock mode, we should
 		 * fix up our variables. */
@@ -586,7 +585,6 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 	}
 
 	lockrep = req_capsule_server_get(pill, &RMF_DLM_REP);
-	LASSERT(lockrep != NULL); /* checked by ldlm_cli_enqueue() */
 
 	intent->it_disposition = (int)lockrep->lock_policy_res1;
 	intent->it_status = (int)lockrep->lock_policy_res2;
@@ -618,7 +616,7 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 		struct mdt_body *body;
 
 		body = req_capsule_server_get(pill, &RMF_MDT_BODY);
-		if (body == NULL) {
+		if (!body) {
 			CERROR("Can't swab mdt_body\n");
 			return -EPROTO;
 		}
@@ -645,7 +643,7 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 			 */
 			eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 							      body->eadatasize);
-			if (eadata == NULL)
+			if (!eadata)
 				return -EPROTO;
 
 			/* save lvb data and length in case this is for layout
@@ -690,7 +688,7 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 			LASSERT(client_is_remote(exp));
 			perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 						lustre_swab_mdt_remote_perm);
-			if (perm == NULL)
+			if (!perm)
 				return -EPROTO;
 		}
 	} else if (it->it_op & IT_LAYOUT) {
@@ -700,21 +698,21 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 		if (lvb_len > 0) {
 			lvb_data = req_capsule_server_sized_get(pill,
 							&RMF_DLM_LVB, lvb_len);
-			if (lvb_data == NULL)
+			if (!lvb_data)
 				return -EPROTO;
 		}
 	}
 
 	/* fill in stripe data for layout lock */
 	lock = ldlm_handle2lock(lockh);
-	if (lock != NULL && ldlm_has_layout(lock) && lvb_data != NULL) {
+	if (lock && ldlm_has_layout(lock) && lvb_data) {
 		void *lmm;
 
 		LDLM_DEBUG(lock, "layout lock returned by: %s, lvb_len: %d\n",
 			ldlm_it2str(it->it_op), lvb_len);
 
 		lmm = libcfs_kvzalloc(lvb_len, GFP_NOFS);
-		if (lmm == NULL) {
+		if (!lmm) {
 			LDLM_LOCK_PUT(lock);
 			return -ENOMEM;
 		}
@@ -722,17 +720,17 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 
 		/* install lvb_data */
 		lock_res_and_lock(lock);
-		if (lock->l_lvb_data == NULL) {
+		if (!lock->l_lvb_data) {
 			lock->l_lvb_type = LVB_T_LAYOUT;
 			lock->l_lvb_data = lmm;
 			lock->l_lvb_len = lvb_len;
 			lmm = NULL;
 		}
 		unlock_res_and_lock(lock);
-		if (lmm != NULL)
+		if (lmm)
 			kvfree(lmm);
 	}
-	if (lock != NULL)
+	if (lock)
 		LDLM_LOCK_PUT(lock);
 
 	return rc;
@@ -782,7 +780,7 @@ int mdc_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
 			policy = &getxattr_policy;
 	}
 
-	LASSERT(reqp == NULL);
+	LASSERT(!reqp);
 
 	generation = obddev->u.cli.cl_import->imp_generation;
 resend:
@@ -823,7 +821,7 @@ resend:
 	if (IS_ERR(req))
 		return PTR_ERR(req);
 
-	if (req != NULL && it && it->it_op & IT_CREAT)
+	if (req && it && it->it_op & IT_CREAT)
 		/* ask ptlrpc not to resend on EINPROGRESS since we have our own
 		 * retry logic */
 		req->rq_no_retry_einprogress = 1;
@@ -878,7 +876,6 @@ resend:
 	}
 
 	lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	LASSERT(lockrep != NULL);
 
 	lockrep->lock_policy_res2 =
 		ptlrpc_status_ntoh(lockrep->lock_policy_res2);
@@ -930,7 +927,6 @@ static int mdc_finish_intent_lock(struct obd_export *exp,
 	struct ldlm_lock *lock;
 	int rc;
 
-	LASSERT(request != NULL);
 	LASSERT(request != LP_POISON);
 	LASSERT(request->rq_repmsg != LP_POISON);
 
@@ -945,7 +941,7 @@ static int mdc_finish_intent_lock(struct obd_export *exp,
 		return rc;
 
 	mdt_body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
-	LASSERT(mdt_body != NULL);      /* mdc_enqueue checked */
+	LASSERT(mdt_body);      /* mdc_enqueue checked */
 
 	/* If we were revalidating a fid/name pair, mark the intent in
 	 * case we fail and get called again from lookup */
@@ -1206,7 +1202,6 @@ static int mdc_intent_getattr_async_interpret(const struct lu_env *env,
 	}
 
 	lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	LASSERT(lockrep != NULL);
 
 	lockrep->lock_policy_res2 =
 		ptlrpc_status_ntoh(lockrep->lock_policy_res2);
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_reint.c b/drivers/staging/lustre/lustre/mdc/mdc_reint.c
index ac7695a..ddeb4b4 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_reint.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_reint.c
@@ -88,7 +88,7 @@ int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid,
 	fid_build_reg_res_name(fid, &res_id);
 	res = ldlm_resource_get(exp->exp_obd->obd_namespace,
 				NULL, &res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 	LDLM_RESOURCE_ADDREF(res);
 	/* Initialize ibits lock policy. */
@@ -111,8 +111,6 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	int count = 0, rc;
 	__u64 bits;
 
-	LASSERT(op_data != NULL);
-
 	bits = MDS_INODELOCK_UPDATE;
 	if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
 		bits |= MDS_INODELOCK_LOOKUP;
@@ -123,7 +121,7 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 						&cancels, LCK_EX, bits);
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_SETATTR);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -151,10 +149,10 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	ptlrpc_request_set_replen(req);
 	if (mod && (op_data->op_flags & MF_EPOCH_OPEN) &&
 	    req->rq_import->imp_replayable) {
-		LASSERT(*mod == NULL);
+		LASSERT(!*mod);
 
 		*mod = obd_mod_alloc();
-		if (*mod == NULL) {
+		if (!*mod) {
 			DEBUG_REQ(D_ERROR, req, "Can't allocate md_open_data");
 		} else {
 			req->rq_replay = 1;
@@ -181,8 +179,6 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 
 		epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
 		body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-		LASSERT(epoch != NULL);
-		LASSERT(body != NULL);
 		epoch->handle = body->handle;
 		epoch->ioepoch = body->ioepoch;
 		req->rq_replay_cb = mdc_replay_open;
@@ -195,7 +191,7 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	*request = req;
 	if (rc && req->rq_commit_cb) {
 		/* Put an extra reference on \var mod on error case. */
-		if (mod != NULL && *mod != NULL)
+		if (mod && *mod)
 			obd_mod_put(*mod);
 		req->rq_commit_cb(req);
 	}
@@ -237,7 +233,7 @@ rebuild:
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_CREATE_RMT_ACL);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -308,7 +304,7 @@ int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
 	struct ptlrpc_request *req = *request;
 	int count = 0, rc;
 
-	LASSERT(req == NULL);
+	LASSERT(!req);
 
 	if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 	    (fid_is_sane(&op_data->op_fid1)) &&
@@ -324,7 +320,7 @@ int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
 						 MDS_INODELOCK_FULL);
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_UNLINK);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -373,7 +369,7 @@ int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
 						 MDS_INODELOCK_UPDATE);
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -429,7 +425,7 @@ int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_RENAME);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 4348127..3d00f53 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -83,7 +83,7 @@ static int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid)
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_GETSTATUS,
 					LUSTRE_MDS_VERSION, MDS_GETSTATUS);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	mdc_pack_body(req, NULL, 0, 0, -1, 0);
@@ -96,7 +96,7 @@ static int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid)
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -136,7 +136,7 @@ static int mdc_getattr_common(struct obd_export *exp,
 
 	/* sanity check for the reply */
 	body = req_capsule_server_get(pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 
 	CDEBUG(D_NET, "mode: %o\n", body->mode);
@@ -146,7 +146,7 @@ static int mdc_getattr_common(struct obd_export *exp,
 
 		eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 						      body->eadatasize);
-		if (eadata == NULL)
+		if (!eadata)
 			return -EPROTO;
 	}
 
@@ -156,7 +156,7 @@ static int mdc_getattr_common(struct obd_export *exp,
 		LASSERT(client_is_remote(exp));
 		perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 						lustre_swab_mdt_remote_perm);
-		if (perm == NULL)
+		if (!perm)
 			return -EPROTO;
 	}
 
@@ -176,7 +176,7 @@ static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
 	}
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
@@ -214,7 +214,7 @@ static int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_GETATTR_NAME);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
@@ -261,7 +261,7 @@ static int mdc_is_subdir(struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 					MDS_IS_SUBDIR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	mdc_is_subdir_pack(req, pfid, cfid, 0);
@@ -290,7 +290,7 @@ static int mdc_xattr_common(struct obd_export *exp,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	if (xattr_name) {
@@ -425,7 +425,7 @@ static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 		return -EPROTO;
 
 	acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
-	if (acl == NULL)
+	if (!acl)
 		return 0;
 
 	if (IS_ERR(acl)) {
@@ -461,7 +461,6 @@ static int mdc_get_lustre_md(struct obd_export *exp,
 	memset(md, 0, sizeof(*md));
 
 	md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
-	LASSERT(md->body != NULL);
 
 	if (md->body->valid & OBD_MD_FLEASIZE) {
 		int lmmsize;
@@ -593,17 +592,16 @@ void mdc_replay_open(struct ptlrpc_request *req)
 	struct lustre_handle old;
 	struct mdt_body *body;
 
-	if (mod == NULL) {
+	if (!mod) {
 		DEBUG_REQ(D_ERROR, req,
 			  "Can't properly replay without open data.");
 		return;
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	och = mod->mod_och;
-	if (och != NULL) {
+	if (och) {
 		struct lustre_handle *file_fh;
 
 		LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
@@ -615,7 +613,7 @@ void mdc_replay_open(struct ptlrpc_request *req)
 		*file_fh = body->handle;
 	}
 	close_req = mod->mod_close_req;
-	if (close_req != NULL) {
+	if (close_req) {
 		__u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
 		struct mdt_ioepoch *epoch;
 
@@ -624,7 +622,7 @@ void mdc_replay_open(struct ptlrpc_request *req)
 					       &RMF_MDT_EPOCH);
 		LASSERT(epoch);
 
-		if (och != NULL)
+		if (och)
 			LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
 		DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 		epoch->handle = body->handle;
@@ -635,7 +633,7 @@ void mdc_commit_open(struct ptlrpc_request *req)
 {
 	struct md_open_data *mod = req->rq_cb_data;
 
-	if (mod == NULL)
+	if (!mod)
 		return;
 
 	/**
@@ -675,15 +673,15 @@ int mdc_set_open_replay_data(struct obd_export *exp,
 
 	rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 	body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(rec != NULL);
+	LASSERT(rec);
 	/* Incoming message in my byte order (it's been swabbed). */
 	/* Outgoing messages always in my byte order. */
-	LASSERT(body != NULL);
+	LASSERT(body);
 
 	/* Only if the import is replayable, we set replay_open data */
 	if (och && imp->imp_replayable) {
 		mod = obd_mod_alloc();
-		if (mod == NULL) {
+		if (!mod) {
 			DEBUG_REQ(D_ERROR, open_req,
 				  "Can't allocate md_open_data");
 			return 0;
@@ -749,11 +747,11 @@ static int mdc_clear_open_replay_data(struct obd_export *exp,
 	 * It is possible to not have \var mod in a case of eviction between
 	 * lookup and ll_file_open().
 	 **/
-	if (mod == NULL)
+	if (!mod)
 		return 0;
 
 	LASSERT(mod != LP_POISON);
-	LASSERT(mod->mod_open_req != NULL);
+	LASSERT(mod->mod_open_req);
 	mdc_free_open(mod);
 
 	mod->mod_och = NULL;
@@ -804,7 +802,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
@@ -820,8 +818,8 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 	ptlrpc_at_set_req_timeout(req);
 
 	/* Ensure that this close's handle is fixed up during replay. */
-	if (likely(mod != NULL)) {
-		LASSERTF(mod->mod_open_req != NULL &&
+	if (likely(mod)) {
+		LASSERTF(mod->mod_open_req &&
 			 mod->mod_open_req->rq_type != LI_POISON,
 			 "POISONED open %p!\n", mod->mod_open_req);
 
@@ -851,7 +849,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 	rc = ptlrpc_queue_wait(req);
 	mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 
-	if (req->rq_repmsg == NULL) {
+	if (!req->rq_repmsg) {
 		CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 		       req->rq_status);
 		if (rc == 0)
@@ -867,7 +865,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 				rc = -rc;
 		}
 		body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-		if (body == NULL)
+		if (!body)
 			rc = -EPROTO;
 	} else if (rc == -ESTALE) {
 		/**
@@ -877,7 +875,6 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 		 */
 		if (mod) {
 			DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
-			LASSERT(mod->mod_open_req != NULL);
 			if (mod->mod_open_req->rq_committed)
 				rc = 0;
 		}
@@ -904,7 +901,7 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_DONE_WRITING);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
@@ -913,8 +910,8 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 		return rc;
 	}
 
-	if (mod != NULL) {
-		LASSERTF(mod->mod_open_req != NULL &&
+	if (mod) {
+		LASSERTF(mod->mod_open_req &&
 			 mod->mod_open_req->rq_type != LI_POISON,
 			 "POISONED setattr %p!\n", mod->mod_open_req);
 
@@ -941,7 +938,6 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 		 * Let's check if mod exists and return no error in that case
 		 */
 		if (mod) {
-			LASSERT(mod->mod_open_req != NULL);
 			if (mod->mod_open_req->rq_committed)
 				rc = 0;
 		}
@@ -950,7 +946,7 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 	if (mod) {
 		if (rc != 0)
 			mod->mod_close_req = NULL;
-		LASSERT(mod->mod_open_req != NULL);
+		LASSERT(mod->mod_open_req);
 		mdc_free_open(mod);
 
 		/* Since now, mod is accessed through setattr req only,
@@ -979,7 +975,7 @@ static int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
 
 restart_bulk:
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
@@ -993,7 +989,7 @@ restart_bulk:
 
 	desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
 				    MDS_BULK_PORTAL);
-	if (desc == NULL) {
+	if (!desc) {
 		ptlrpc_request_free(req);
 		return -ENOMEM;
 	}
@@ -1067,7 +1063,7 @@ static int mdc_statfs(const struct lu_env *env,
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
 					LUSTRE_MDS_VERSION, MDS_STATFS);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto output;
 	}
@@ -1089,7 +1085,7 @@ static int mdc_statfs(const struct lu_env *env,
 	}
 
 	msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
-	if (msfs == NULL) {
+	if (!msfs) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1162,7 +1158,7 @@ static int mdc_ioc_hsm_progress(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
 					LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1171,7 +1167,7 @@ static int mdc_ioc_hsm_progress(struct obd_export *exp,
 
 	/* Copy hsm_progress struct */
 	req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
-	if (req_hpk == NULL) {
+	if (!req_hpk) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1196,7 +1192,7 @@ static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
 					LUSTRE_MDS_VERSION,
 					MDS_HSM_CT_REGISTER);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1206,7 +1202,7 @@ static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
 	/* Copy hsm_progress struct */
 	archive_mask = req_capsule_client_get(&req->rq_pill,
 					      &RMF_MDS_HSM_ARCHIVE);
-	if (archive_mask == NULL) {
+	if (!archive_mask) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1231,7 +1227,7 @@ static int mdc_ioc_hsm_current_action(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_HSM_ACTION);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
@@ -1251,7 +1247,7 @@ static int mdc_ioc_hsm_current_action(struct obd_export *exp,
 
 	req_hca = req_capsule_server_get(&req->rq_pill,
 					 &RMF_MDS_HSM_CURRENT_ACTION);
-	if (req_hca == NULL) {
+	if (!req_hca) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1271,7 +1267,7 @@ static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
 					LUSTRE_MDS_VERSION,
 					MDS_HSM_CT_UNREGISTER);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1296,7 +1292,7 @@ static int mdc_ioc_hsm_state_get(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_HSM_STATE_GET);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
@@ -1315,7 +1311,7 @@ static int mdc_ioc_hsm_state_get(struct obd_export *exp,
 		goto out;
 
 	req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
-	if (req_hus == NULL) {
+	if (!req_hus) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1337,7 +1333,7 @@ static int mdc_ioc_hsm_state_set(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_HSM_STATE_SET);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
@@ -1351,7 +1347,7 @@ static int mdc_ioc_hsm_state_set(struct obd_export *exp,
 
 	/* Copy states */
 	req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
-	if (req_hss == NULL) {
+	if (!req_hss) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1376,7 +1372,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 	int			 rc;
 
 	req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1397,7 +1393,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
 	/* Copy hsm_request struct */
 	req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
-	if (req_hr == NULL) {
+	if (!req_hr) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1405,7 +1401,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
 	/* Copy hsm_user_item structs */
 	req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
-	if (req_hui == NULL) {
+	if (!req_hui) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1414,7 +1410,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
 	/* Copy opaque field */
 	req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
-	if (req_opaque == NULL) {
+	if (!req_opaque) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1513,7 +1509,7 @@ static int mdc_changelog_send_thread(void *csdata)
 
 	/* Set up the remote catalog handle */
 	ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
-	if (ctxt == NULL) {
+	if (!ctxt) {
 		rc = -ENOENT;
 		goto out;
 	}
@@ -1597,7 +1593,7 @@ static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
 					MDS_QUOTACHECK);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
@@ -1641,7 +1637,7 @@ static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
 					MDS_QUOTACTL);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
@@ -1695,7 +1691,7 @@ static int mdc_ioc_swap_layouts(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_SWAP_LAYOUTS);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -1881,7 +1877,7 @@ static int mdc_get_info_rpc(struct obd_export *exp,
 	int		     rc = -EINVAL;
 
 	req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
@@ -2140,7 +2136,7 @@ static int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
@@ -2182,7 +2178,7 @@ static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
 		 * Flush current sequence to make client obtain new one
 		 * from server in case of disconnect/reconnect.
 		 */
-		if (cli->cl_seq != NULL)
+		if (cli->cl_seq)
 			seq_client_flush(cli->cl_seq);
 
 		rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
@@ -2429,7 +2425,7 @@ static int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
-- 
2.1.0

[lustre-devel] [PATCH 21/45] staging/lustre/mdc: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/mdc/mdc_lib.c     |  12 +--
 drivers/staging/lustre/lustre/mdc/mdc_locks.c   |  47 +++++-----
 drivers/staging/lustre/lustre/mdc/mdc_reint.c   |  24 ++---
 drivers/staging/lustre/lustre/mdc/mdc_request.c | 116 ++++++++++++------------
 4 files changed, 90 insertions(+), 109 deletions(-)

diff --git a/drivers/staging/lustre/lustre/mdc/mdc_lib.c b/drivers/staging/lustre/lustre/mdc/mdc_lib.c
index 7218532..ea2ab23 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_lib.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_lib.c
@@ -41,8 +41,6 @@
 
 static void __mdc_pack_body(struct mdt_body *b, __u32 suppgid)
 {
-	LASSERT(b != NULL);
-
 	b->suppgid = suppgid;
 	b->uid = from_kuid(&init_user_ns, current_uid());
 	b->gid = from_kgid(&init_user_ns, current_gid());
@@ -83,7 +81,6 @@ void mdc_pack_body(struct ptlrpc_request *req, const struct lu_fid *fid,
 {
 	struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
 						    &RMF_MDT_BODY);
-	LASSERT(b != NULL);
 	b->valid = valid;
 	b->eadatasize = ea_size;
 	b->flags = flags;
@@ -323,7 +320,7 @@ void mdc_setattr_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
 		return;
 
 	lum = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
-	if (ea == NULL) { /* Remove LOV EA */
+	if (!ea) { /* Remove LOV EA */
 		lum->lmm_magic = LOV_USER_MAGIC_V1;
 		lum->lmm_stripe_size = 0;
 		lum->lmm_stripe_count = 0;
@@ -346,7 +343,6 @@ void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 
 	CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_unlink));
 	rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
-	LASSERT(rec != NULL);
 
 	rec->ul_opcode   = op_data->op_cli_flags & CLI_RM_ENTRY ?
 					REINT_RMENTRY : REINT_UNLINK;
@@ -362,7 +358,7 @@ void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 	rec->ul_bias     = op_data->op_bias;
 
 	tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
-	LASSERT(tmp != NULL);
+	LASSERT(tmp);
 	LOGL0(op_data->op_name, op_data->op_namelen, tmp);
 }
 
@@ -373,7 +369,6 @@ void mdc_link_pack(struct ptlrpc_request *req, struct md_op_data *op_data)
 
 	CLASSERT(sizeof(struct mdt_rec_reint) == sizeof(struct mdt_rec_link));
 	rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
-	LASSERT(rec != NULL);
 
 	rec->lk_opcode   = REINT_LINK;
 	rec->lk_fsuid    = op_data->op_fsuid; /* current->fsuid; */
@@ -456,10 +451,9 @@ static void mdc_hsm_release_pack(struct ptlrpc_request *req,
 		struct ldlm_lock *lock;
 
 		data = req_capsule_client_get(&req->rq_pill, &RMF_CLOSE_DATA);
-		LASSERT(data != NULL);
 
 		lock = ldlm_handle2lock(&op_data->op_lease_handle);
-		if (lock != NULL) {
+		if (lock) {
 			data->cd_handle = lock->l_remote_handle;
 			ldlm_lock_put(lock);
 		}
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_locks.c b/drivers/staging/lustre/lustre/mdc/mdc_locks.c
index ef9a1e1..09dd2b3 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_locks.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_locks.c
@@ -129,7 +129,7 @@ int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
 
 	lock = ldlm_handle2lock((struct lustre_handle *)lockh);
 
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	lock_res_and_lock(lock);
 	if (lock->l_resource->lr_lvb_inode &&
 	    lock->l_resource->lr_lvb_inode != data) {
@@ -191,12 +191,12 @@ int mdc_null_inode(struct obd_export *exp,
 	struct ldlm_resource *res;
 	struct ldlm_namespace *ns = class_exp2obd(exp)->obd_namespace;
 
-	LASSERTF(ns != NULL, "no namespace passed\n");
+	LASSERTF(ns, "no namespace passed\n");
 
 	fid_build_reg_res_name(fid, &res_id);
 
 	res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 
 	lock_res(res);
@@ -317,7 +317,7 @@ static struct ptlrpc_request *mdc_intent_open_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_LDLM_INTENT_OPEN);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return ERR_PTR(-ENOMEM);
 	}
@@ -365,7 +365,7 @@ mdc_intent_getxattr_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					&RQF_LDLM_INTENT_GETXATTR);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
@@ -409,7 +409,7 @@ static struct ptlrpc_request *mdc_intent_unlink_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_LDLM_INTENT_UNLINK);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
@@ -453,7 +453,7 @@ static struct ptlrpc_request *mdc_intent_getattr_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_LDLM_INTENT_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
@@ -497,7 +497,7 @@ static struct ptlrpc_request *mdc_intent_layout_pack(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				&RQF_LDLM_INTENT_LAYOUT);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, 0);
@@ -530,7 +530,7 @@ mdc_enqueue_pack(struct obd_export *exp, int lvb_len)
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
-	if (req == NULL)
+	if (!req)
 		return ERR_PTR(-ENOMEM);
 
 	rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
@@ -573,7 +573,6 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 		rc = 0;
 	} else { /* rc = 0 */
 		lock = ldlm_handle2lock(lockh);
-		LASSERT(lock != NULL);
 
 		/* If the server gave us back a different lock mode, we should
 		 * fix up our variables. */
@@ -586,7 +585,6 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 	}
 
 	lockrep = req_capsule_server_get(pill, &RMF_DLM_REP);
-	LASSERT(lockrep != NULL); /* checked by ldlm_cli_enqueue() */
 
 	intent->it_disposition = (int)lockrep->lock_policy_res1;
 	intent->it_status = (int)lockrep->lock_policy_res2;
@@ -618,7 +616,7 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 		struct mdt_body *body;
 
 		body = req_capsule_server_get(pill, &RMF_MDT_BODY);
-		if (body == NULL) {
+		if (!body) {
 			CERROR("Can't swab mdt_body\n");
 			return -EPROTO;
 		}
@@ -645,7 +643,7 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 			 */
 			eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 							      body->eadatasize);
-			if (eadata == NULL)
+			if (!eadata)
 				return -EPROTO;
 
 			/* save lvb data and length in case this is for layout
@@ -690,7 +688,7 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 			LASSERT(client_is_remote(exp));
 			perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 						lustre_swab_mdt_remote_perm);
-			if (perm == NULL)
+			if (!perm)
 				return -EPROTO;
 		}
 	} else if (it->it_op & IT_LAYOUT) {
@@ -700,21 +698,21 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 		if (lvb_len > 0) {
 			lvb_data = req_capsule_server_sized_get(pill,
 							&RMF_DLM_LVB, lvb_len);
-			if (lvb_data == NULL)
+			if (!lvb_data)
 				return -EPROTO;
 		}
 	}
 
 	/* fill in stripe data for layout lock */
 	lock = ldlm_handle2lock(lockh);
-	if (lock != NULL && ldlm_has_layout(lock) && lvb_data != NULL) {
+	if (lock && ldlm_has_layout(lock) && lvb_data) {
 		void *lmm;
 
 		LDLM_DEBUG(lock, "layout lock returned by: %s, lvb_len: %d\n",
 			ldlm_it2str(it->it_op), lvb_len);
 
 		lmm = libcfs_kvzalloc(lvb_len, GFP_NOFS);
-		if (lmm == NULL) {
+		if (!lmm) {
 			LDLM_LOCK_PUT(lock);
 			return -ENOMEM;
 		}
@@ -722,17 +720,17 @@ static int mdc_finish_enqueue(struct obd_export *exp,
 
 		/* install lvb_data */
 		lock_res_and_lock(lock);
-		if (lock->l_lvb_data == NULL) {
+		if (!lock->l_lvb_data) {
 			lock->l_lvb_type = LVB_T_LAYOUT;
 			lock->l_lvb_data = lmm;
 			lock->l_lvb_len = lvb_len;
 			lmm = NULL;
 		}
 		unlock_res_and_lock(lock);
-		if (lmm != NULL)
+		if (lmm)
 			kvfree(lmm);
 	}
-	if (lock != NULL)
+	if (lock)
 		LDLM_LOCK_PUT(lock);
 
 	return rc;
@@ -782,7 +780,7 @@ int mdc_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
 			policy = &getxattr_policy;
 	}
 
-	LASSERT(reqp == NULL);
+	LASSERT(!reqp);
 
 	generation = obddev->u.cli.cl_import->imp_generation;
 resend:
@@ -823,7 +821,7 @@ resend:
 	if (IS_ERR(req))
 		return PTR_ERR(req);
 
-	if (req != NULL && it && it->it_op & IT_CREAT)
+	if (req && it && it->it_op & IT_CREAT)
 		/* ask ptlrpc not to resend on EINPROGRESS since we have our own
 		 * retry logic */
 		req->rq_no_retry_einprogress = 1;
@@ -878,7 +876,6 @@ resend:
 	}
 
 	lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	LASSERT(lockrep != NULL);
 
 	lockrep->lock_policy_res2 =
 		ptlrpc_status_ntoh(lockrep->lock_policy_res2);
@@ -930,7 +927,6 @@ static int mdc_finish_intent_lock(struct obd_export *exp,
 	struct ldlm_lock *lock;
 	int rc;
 
-	LASSERT(request != NULL);
 	LASSERT(request != LP_POISON);
 	LASSERT(request->rq_repmsg != LP_POISON);
 
@@ -945,7 +941,7 @@ static int mdc_finish_intent_lock(struct obd_export *exp,
 		return rc;
 
 	mdt_body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
-	LASSERT(mdt_body != NULL);      /* mdc_enqueue checked */
+	LASSERT(mdt_body);      /* mdc_enqueue checked */
 
 	/* If we were revalidating a fid/name pair, mark the intent in
 	 * case we fail and get called again from lookup */
@@ -1206,7 +1202,6 @@ static int mdc_intent_getattr_async_interpret(const struct lu_env *env,
 	}
 
 	lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
-	LASSERT(lockrep != NULL);
 
 	lockrep->lock_policy_res2 =
 		ptlrpc_status_ntoh(lockrep->lock_policy_res2);
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_reint.c b/drivers/staging/lustre/lustre/mdc/mdc_reint.c
index ac7695a..ddeb4b4 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_reint.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_reint.c
@@ -88,7 +88,7 @@ int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid,
 	fid_build_reg_res_name(fid, &res_id);
 	res = ldlm_resource_get(exp->exp_obd->obd_namespace,
 				NULL, &res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 	LDLM_RESOURCE_ADDREF(res);
 	/* Initialize ibits lock policy. */
@@ -111,8 +111,6 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	int count = 0, rc;
 	__u64 bits;
 
-	LASSERT(op_data != NULL);
-
 	bits = MDS_INODELOCK_UPDATE;
 	if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
 		bits |= MDS_INODELOCK_LOOKUP;
@@ -123,7 +121,7 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 						&cancels, LCK_EX, bits);
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_SETATTR);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -151,10 +149,10 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	ptlrpc_request_set_replen(req);
 	if (mod && (op_data->op_flags & MF_EPOCH_OPEN) &&
 	    req->rq_import->imp_replayable) {
-		LASSERT(*mod == NULL);
+		LASSERT(!*mod);
 
 		*mod = obd_mod_alloc();
-		if (*mod == NULL) {
+		if (!*mod) {
 			DEBUG_REQ(D_ERROR, req, "Can't allocate md_open_data");
 		} else {
 			req->rq_replay = 1;
@@ -181,8 +179,6 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 
 		epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
 		body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-		LASSERT(epoch != NULL);
-		LASSERT(body != NULL);
 		epoch->handle = body->handle;
 		epoch->ioepoch = body->ioepoch;
 		req->rq_replay_cb = mdc_replay_open;
@@ -195,7 +191,7 @@ int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
 	*request = req;
 	if (rc && req->rq_commit_cb) {
 		/* Put an extra reference on \var mod on error case. */
-		if (mod != NULL && *mod != NULL)
+		if (mod && *mod)
 			obd_mod_put(*mod);
 		req->rq_commit_cb(req);
 	}
@@ -237,7 +233,7 @@ rebuild:
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_CREATE_RMT_ACL);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -308,7 +304,7 @@ int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
 	struct ptlrpc_request *req = *request;
 	int count = 0, rc;
 
-	LASSERT(req == NULL);
+	LASSERT(!req);
 
 	if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
 	    (fid_is_sane(&op_data->op_fid1)) &&
@@ -324,7 +320,7 @@ int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
 						 MDS_INODELOCK_FULL);
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_UNLINK);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -373,7 +369,7 @@ int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
 						 MDS_INODELOCK_UPDATE);
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -429,7 +425,7 @@ int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_REINT_RENAME);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 4348127..3d00f53 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -83,7 +83,7 @@ static int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid)
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_GETSTATUS,
 					LUSTRE_MDS_VERSION, MDS_GETSTATUS);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	mdc_pack_body(req, NULL, 0, 0, -1, 0);
@@ -96,7 +96,7 @@ static int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid)
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -136,7 +136,7 @@ static int mdc_getattr_common(struct obd_export *exp,
 
 	/* sanity check for the reply */
 	body = req_capsule_server_get(pill, &RMF_MDT_BODY);
-	if (body == NULL)
+	if (!body)
 		return -EPROTO;
 
 	CDEBUG(D_NET, "mode: %o\n", body->mode);
@@ -146,7 +146,7 @@ static int mdc_getattr_common(struct obd_export *exp,
 
 		eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 						      body->eadatasize);
-		if (eadata == NULL)
+		if (!eadata)
 			return -EPROTO;
 	}
 
@@ -156,7 +156,7 @@ static int mdc_getattr_common(struct obd_export *exp,
 		LASSERT(client_is_remote(exp));
 		perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 						lustre_swab_mdt_remote_perm);
-		if (perm == NULL)
+		if (!perm)
 			return -EPROTO;
 	}
 
@@ -176,7 +176,7 @@ static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
 	}
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
@@ -214,7 +214,7 @@ static int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_GETATTR_NAME);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
@@ -261,7 +261,7 @@ static int mdc_is_subdir(struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 					MDS_IS_SUBDIR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	mdc_is_subdir_pack(req, pfid, cfid, 0);
@@ -290,7 +290,7 @@ static int mdc_xattr_common(struct obd_export *exp,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	if (xattr_name) {
@@ -425,7 +425,7 @@ static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 		return -EPROTO;
 
 	acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
-	if (acl == NULL)
+	if (!acl)
 		return 0;
 
 	if (IS_ERR(acl)) {
@@ -461,7 +461,6 @@ static int mdc_get_lustre_md(struct obd_export *exp,
 	memset(md, 0, sizeof(*md));
 
 	md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
-	LASSERT(md->body != NULL);
 
 	if (md->body->valid & OBD_MD_FLEASIZE) {
 		int lmmsize;
@@ -593,17 +592,16 @@ void mdc_replay_open(struct ptlrpc_request *req)
 	struct lustre_handle old;
 	struct mdt_body *body;
 
-	if (mod == NULL) {
+	if (!mod) {
 		DEBUG_REQ(D_ERROR, req,
 			  "Can't properly replay without open data.");
 		return;
 	}
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(body != NULL);
 
 	och = mod->mod_och;
-	if (och != NULL) {
+	if (och) {
 		struct lustre_handle *file_fh;
 
 		LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
@@ -615,7 +613,7 @@ void mdc_replay_open(struct ptlrpc_request *req)
 		*file_fh = body->handle;
 	}
 	close_req = mod->mod_close_req;
-	if (close_req != NULL) {
+	if (close_req) {
 		__u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
 		struct mdt_ioepoch *epoch;
 
@@ -624,7 +622,7 @@ void mdc_replay_open(struct ptlrpc_request *req)
 					       &RMF_MDT_EPOCH);
 		LASSERT(epoch);
 
-		if (och != NULL)
+		if (och)
 			LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
 		DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 		epoch->handle = body->handle;
@@ -635,7 +633,7 @@ void mdc_commit_open(struct ptlrpc_request *req)
 {
 	struct md_open_data *mod = req->rq_cb_data;
 
-	if (mod == NULL)
+	if (!mod)
 		return;
 
 	/**
@@ -675,15 +673,15 @@ int mdc_set_open_replay_data(struct obd_export *exp,
 
 	rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 	body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
-	LASSERT(rec != NULL);
+	LASSERT(rec);
 	/* Incoming message in my byte order (it's been swabbed). */
 	/* Outgoing messages always in my byte order. */
-	LASSERT(body != NULL);
+	LASSERT(body);
 
 	/* Only if the import is replayable, we set replay_open data */
 	if (och && imp->imp_replayable) {
 		mod = obd_mod_alloc();
-		if (mod == NULL) {
+		if (!mod) {
 			DEBUG_REQ(D_ERROR, open_req,
 				  "Can't allocate md_open_data");
 			return 0;
@@ -749,11 +747,11 @@ static int mdc_clear_open_replay_data(struct obd_export *exp,
 	 * It is possible to not have \var mod in a case of eviction between
 	 * lookup and ll_file_open().
 	 **/
-	if (mod == NULL)
+	if (!mod)
 		return 0;
 
 	LASSERT(mod != LP_POISON);
-	LASSERT(mod->mod_open_req != NULL);
+	LASSERT(mod->mod_open_req);
 	mdc_free_open(mod);
 
 	mod->mod_och = NULL;
@@ -804,7 +802,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
@@ -820,8 +818,8 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 	ptlrpc_at_set_req_timeout(req);
 
 	/* Ensure that this close's handle is fixed up during replay. */
-	if (likely(mod != NULL)) {
-		LASSERTF(mod->mod_open_req != NULL &&
+	if (likely(mod)) {
+		LASSERTF(mod->mod_open_req &&
 			 mod->mod_open_req->rq_type != LI_POISON,
 			 "POISONED open %p!\n", mod->mod_open_req);
 
@@ -851,7 +849,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 	rc = ptlrpc_queue_wait(req);
 	mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 
-	if (req->rq_repmsg == NULL) {
+	if (!req->rq_repmsg) {
 		CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 		       req->rq_status);
 		if (rc == 0)
@@ -867,7 +865,7 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 				rc = -rc;
 		}
 		body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-		if (body == NULL)
+		if (!body)
 			rc = -EPROTO;
 	} else if (rc == -ESTALE) {
 		/**
@@ -877,7 +875,6 @@ static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 		 */
 		if (mod) {
 			DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
-			LASSERT(mod->mod_open_req != NULL);
 			if (mod->mod_open_req->rq_committed)
 				rc = 0;
 		}
@@ -904,7 +901,7 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_DONE_WRITING);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
@@ -913,8 +910,8 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 		return rc;
 	}
 
-	if (mod != NULL) {
-		LASSERTF(mod->mod_open_req != NULL &&
+	if (mod) {
+		LASSERTF(mod->mod_open_req &&
 			 mod->mod_open_req->rq_type != LI_POISON,
 			 "POISONED setattr %p!\n", mod->mod_open_req);
 
@@ -941,7 +938,6 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 		 * Let's check if mod exists and return no error in that case
 		 */
 		if (mod) {
-			LASSERT(mod->mod_open_req != NULL);
 			if (mod->mod_open_req->rq_committed)
 				rc = 0;
 		}
@@ -950,7 +946,7 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 	if (mod) {
 		if (rc != 0)
 			mod->mod_close_req = NULL;
-		LASSERT(mod->mod_open_req != NULL);
+		LASSERT(mod->mod_open_req);
 		mdc_free_open(mod);
 
 		/* Since now, mod is accessed through setattr req only,
@@ -979,7 +975,7 @@ static int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
 
 restart_bulk:
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
@@ -993,7 +989,7 @@ restart_bulk:
 
 	desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
 				    MDS_BULK_PORTAL);
-	if (desc == NULL) {
+	if (!desc) {
 		ptlrpc_request_free(req);
 		return -ENOMEM;
 	}
@@ -1067,7 +1063,7 @@ static int mdc_statfs(const struct lu_env *env,
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
 					LUSTRE_MDS_VERSION, MDS_STATFS);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto output;
 	}
@@ -1089,7 +1085,7 @@ static int mdc_statfs(const struct lu_env *env,
 	}
 
 	msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
-	if (msfs == NULL) {
+	if (!msfs) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1162,7 +1158,7 @@ static int mdc_ioc_hsm_progress(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
 					LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1171,7 +1167,7 @@ static int mdc_ioc_hsm_progress(struct obd_export *exp,
 
 	/* Copy hsm_progress struct */
 	req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
-	if (req_hpk == NULL) {
+	if (!req_hpk) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1196,7 +1192,7 @@ static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
 					LUSTRE_MDS_VERSION,
 					MDS_HSM_CT_REGISTER);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1206,7 +1202,7 @@ static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
 	/* Copy hsm_progress struct */
 	archive_mask = req_capsule_client_get(&req->rq_pill,
 					      &RMF_MDS_HSM_ARCHIVE);
-	if (archive_mask == NULL) {
+	if (!archive_mask) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1231,7 +1227,7 @@ static int mdc_ioc_hsm_current_action(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_HSM_ACTION);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
@@ -1251,7 +1247,7 @@ static int mdc_ioc_hsm_current_action(struct obd_export *exp,
 
 	req_hca = req_capsule_server_get(&req->rq_pill,
 					 &RMF_MDS_HSM_CURRENT_ACTION);
-	if (req_hca == NULL) {
+	if (!req_hca) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1271,7 +1267,7 @@ static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
 	req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
 					LUSTRE_MDS_VERSION,
 					MDS_HSM_CT_UNREGISTER);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1296,7 +1292,7 @@ static int mdc_ioc_hsm_state_get(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_HSM_STATE_GET);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
@@ -1315,7 +1311,7 @@ static int mdc_ioc_hsm_state_get(struct obd_export *exp,
 		goto out;
 
 	req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
-	if (req_hus == NULL) {
+	if (!req_hus) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1337,7 +1333,7 @@ static int mdc_ioc_hsm_state_set(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_HSM_STATE_SET);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
@@ -1351,7 +1347,7 @@ static int mdc_ioc_hsm_state_set(struct obd_export *exp,
 
 	/* Copy states */
 	req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
-	if (req_hss == NULL) {
+	if (!req_hss) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1376,7 +1372,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 	int			 rc;
 
 	req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1397,7 +1393,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
 	/* Copy hsm_request struct */
 	req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
-	if (req_hr == NULL) {
+	if (!req_hr) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1405,7 +1401,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
 	/* Copy hsm_user_item structs */
 	req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
-	if (req_hui == NULL) {
+	if (!req_hui) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1414,7 +1410,7 @@ static int mdc_ioc_hsm_request(struct obd_export *exp,
 
 	/* Copy opaque field */
 	req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
-	if (req_opaque == NULL) {
+	if (!req_opaque) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -1513,7 +1509,7 @@ static int mdc_changelog_send_thread(void *csdata)
 
 	/* Set up the remote catalog handle */
 	ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
-	if (ctxt == NULL) {
+	if (!ctxt) {
 		rc = -ENOENT;
 		goto out;
 	}
@@ -1597,7 +1593,7 @@ static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
 					MDS_QUOTACHECK);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
@@ -1641,7 +1637,7 @@ static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
 					MDS_QUOTACTL);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
@@ -1695,7 +1691,7 @@ static int mdc_ioc_swap_layouts(struct obd_export *exp,
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 				   &RQF_MDS_SWAP_LAYOUTS);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -1881,7 +1877,7 @@ static int mdc_get_info_rpc(struct obd_export *exp,
 	int		     rc = -EINVAL;
 
 	req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
@@ -2140,7 +2136,7 @@ static int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
@@ -2182,7 +2178,7 @@ static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
 		 * Flush current sequence to make client obtain new one
 		 * from server in case of disconnect/reconnect.
 		 */
-		if (cli->cl_seq != NULL)
+		if (cli->cl_seq)
 			seq_client_flush(cli->cl_seq);
 
 		rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
@@ -2429,7 +2425,7 @@ static int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
 
 	*request = NULL;
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
-- 
2.1.0

[PATCH 22/45] staging/lustre/mgc: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/mgc/mgc_request.c | 41 ++++++++++++-------------
 1 file changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/lustre/lustre/mgc/mgc_request.c b/drivers/staging/lustre/lustre/mgc/mgc_request.c
index ab4800c..bd34ab3 100644
--- a/drivers/staging/lustre/lustre/mgc/mgc_request.c
+++ b/drivers/staging/lustre/lustre/mgc/mgc_request.c
@@ -162,7 +162,7 @@ struct config_llog_data *config_log_find(char *logname,
 	struct config_llog_data *found = NULL;
 	void *instance;
 
-	LASSERT(logname != NULL);
+	LASSERT(logname);
 
 	instance = cfg ? cfg->cfg_instance : NULL;
 	spin_lock(&config_list_lock);
@@ -300,7 +300,7 @@ static int config_log_add(struct obd_device *obd, char *logname,
 	 * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log.
 	 */
 	ptr = strrchr(logname, '-');
-	if (ptr == NULL || ptr - logname > 8) {
+	if (!ptr || ptr - logname > 8) {
 		CERROR("logname %s is too long\n", logname);
 		return -EINVAL;
 	}
@@ -309,7 +309,7 @@ static int config_log_add(struct obd_device *obd, char *logname,
 	strcpy(seclogname + (ptr - logname), "-sptlrpc");
 
 	sptlrpc_cld = config_log_find(seclogname, NULL);
-	if (sptlrpc_cld == NULL) {
+	if (!sptlrpc_cld) {
 		sptlrpc_cld = do_config_log_add(obd, seclogname,
 						CONFIG_T_SPTLRPC, NULL, NULL);
 		if (IS_ERR(sptlrpc_cld)) {
@@ -376,7 +376,7 @@ static int config_log_end(char *logname, struct config_llog_instance *cfg)
 	int rc = 0;
 
 	cld = config_log_find(logname, cfg);
-	if (cld == NULL)
+	if (!cld)
 		return -ENOENT;
 
 	mutex_lock(&cld->cld_lock);
@@ -455,7 +455,7 @@ int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data)
 
 	spin_lock(&config_list_lock);
 	list_for_each_entry(cld, &config_llog_list, cld_list_chain) {
-		if (cld->cld_recover == NULL)
+		if (!cld->cld_recover)
 			continue;
 		seq_printf(m,  "    - { client: %s, nidtbl_version: %u }\n",
 			       cld->cld_logname,
@@ -883,7 +883,7 @@ static int mgc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_LDLM_ENQUEUE, LUSTRE_DLM_VERSION,
 					LDLM_ENQUEUE);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, 0);
@@ -921,7 +921,7 @@ static int mgc_target_register(struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MGS_TARGET_REG, LUSTRE_MGS_VERSION,
 					MGS_TARGET_REG);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_mti = req_capsule_client_get(&req->rq_pill, &RMF_MGS_TARGET_INFO);
@@ -1109,7 +1109,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 	int   rc  = 0;
 	int   off = 0;
 
-	LASSERT(cfg->cfg_instance != NULL);
+	LASSERT(cfg->cfg_instance);
 	LASSERT(cfg->cfg_sb == cfg->cfg_instance);
 
 	inst = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
@@ -1195,7 +1195,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 		/* lustre-OST0001-osc-<instance #> */
 		strcpy(obdname, cld->cld_logname);
 		cname = strrchr(obdname, '-');
-		if (cname == NULL) {
+		if (!cname) {
 			CERROR("mgc %s: invalid logname %s\n",
 			       mgc->obd_name, obdname);
 			break;
@@ -1212,7 +1212,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 
 		/* find the obd by obdname */
 		obd = class_name2obd(obdname);
-		if (obd == NULL) {
+		if (!obd) {
 			CDEBUG(D_INFO, "mgc %s: cannot find obdname %s\n",
 			       mgc->obd_name, obdname);
 			rc = 0;
@@ -1227,7 +1227,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 		uuid = buf + pos;
 
 		down_read(&obd->u.cli.cl_sem);
-		if (obd->u.cli.cl_import == NULL) {
+		if (!obd->u.cli.cl_import) {
 			/* client does not connect to the OST yet */
 			up_read(&obd->u.cli.cl_sem);
 			rc = 0;
@@ -1257,7 +1257,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 
 		rc = -ENOMEM;
 		lcfg = lustre_cfg_new(LCFG_PARAM, &bufs);
-		if (lcfg == NULL) {
+		if (!lcfg) {
 			CERROR("mgc: cannot allocate memory\n");
 			break;
 		}
@@ -1309,14 +1309,14 @@ static int mgc_process_recover_log(struct obd_device *obd,
 		nrpages = CONFIG_READ_NRPAGES_INIT;
 
 	pages = kcalloc(nrpages, sizeof(*pages), GFP_KERNEL);
-	if (pages == NULL) {
+	if (!pages) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	for (i = 0; i < nrpages; i++) {
 		pages[i] = alloc_page(GFP_KERNEL);
-		if (pages[i] == NULL) {
+		if (!pages[i]) {
 			rc = -ENOMEM;
 			goto out;
 		}
@@ -1327,7 +1327,7 @@ again:
 	LASSERT(mutex_is_locked(&cld->cld_lock));
 	req = ptlrpc_request_alloc(class_exp2cliimp(cld->cld_mgcexp),
 				   &RQF_MGS_CONFIG_READ);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1338,7 +1338,6 @@ again:
 
 	/* pack request */
 	body = req_capsule_client_get(&req->rq_pill, &RMF_MGS_CONFIG_BODY);
-	LASSERT(body != NULL);
 	LASSERT(sizeof(body->mcb_name) > strlen(cld->cld_logname));
 	if (strlcpy(body->mcb_name, cld->cld_logname, sizeof(body->mcb_name))
 	    >= sizeof(body->mcb_name)) {
@@ -1353,7 +1352,7 @@ again:
 	/* allocate bulk transfer descriptor */
 	desc = ptlrpc_prep_bulk_imp(req, nrpages, 1, BULK_PUT_SINK,
 				    MGS_BULK_PORTAL);
-	if (desc == NULL) {
+	if (!desc) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1434,7 +1433,7 @@ out:
 
 	if (pages) {
 		for (i = 0; i < nrpages; i++) {
-			if (pages[i] == NULL)
+			if (!pages[i])
 				break;
 			__free_page(pages[i]);
 		}
@@ -1635,7 +1634,7 @@ static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
 		if (rc)
 			break;
 		cld = config_log_find(logname, cfg);
-		if (cld == NULL) {
+		if (!cld) {
 			rc = -ENOENT;
 			break;
 		}
@@ -1646,7 +1645,7 @@ static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
 		cld->cld_cfg.cfg_flags |= CFG_F_COMPAT146;
 
 		rc = mgc_process_log(obd, cld);
-		if (rc == 0 && cld->cld_recover != NULL) {
+		if (rc == 0 && cld->cld_recover) {
 			if (OCD_HAS_FLAG(&obd->u.cli.cl_import->
 					 imp_connect_data, IMP_RECOV)) {
 				rc = mgc_process_log(obd, cld->cld_recover);
@@ -1660,7 +1659,7 @@ static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
 				CERROR("Cannot process recover llog %d\n", rc);
 		}
 
-		if (rc == 0 && cld->cld_params != NULL) {
+		if (rc == 0 && cld->cld_params) {
 			rc = mgc_process_log(obd, cld->cld_params);
 			if (rc == -ENOENT) {
 				CDEBUG(D_MGC,
-- 
2.1.0

[lustre-devel] [PATCH 22/45] staging/lustre/mgc: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/mgc/mgc_request.c | 41 ++++++++++++-------------
 1 file changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/lustre/lustre/mgc/mgc_request.c b/drivers/staging/lustre/lustre/mgc/mgc_request.c
index ab4800c..bd34ab3 100644
--- a/drivers/staging/lustre/lustre/mgc/mgc_request.c
+++ b/drivers/staging/lustre/lustre/mgc/mgc_request.c
@@ -162,7 +162,7 @@ struct config_llog_data *config_log_find(char *logname,
 	struct config_llog_data *found = NULL;
 	void *instance;
 
-	LASSERT(logname != NULL);
+	LASSERT(logname);
 
 	instance = cfg ? cfg->cfg_instance : NULL;
 	spin_lock(&config_list_lock);
@@ -300,7 +300,7 @@ static int config_log_add(struct obd_device *obd, char *logname,
 	 * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log.
 	 */
 	ptr = strrchr(logname, '-');
-	if (ptr == NULL || ptr - logname > 8) {
+	if (!ptr || ptr - logname > 8) {
 		CERROR("logname %s is too long\n", logname);
 		return -EINVAL;
 	}
@@ -309,7 +309,7 @@ static int config_log_add(struct obd_device *obd, char *logname,
 	strcpy(seclogname + (ptr - logname), "-sptlrpc");
 
 	sptlrpc_cld = config_log_find(seclogname, NULL);
-	if (sptlrpc_cld == NULL) {
+	if (!sptlrpc_cld) {
 		sptlrpc_cld = do_config_log_add(obd, seclogname,
 						CONFIG_T_SPTLRPC, NULL, NULL);
 		if (IS_ERR(sptlrpc_cld)) {
@@ -376,7 +376,7 @@ static int config_log_end(char *logname, struct config_llog_instance *cfg)
 	int rc = 0;
 
 	cld = config_log_find(logname, cfg);
-	if (cld == NULL)
+	if (!cld)
 		return -ENOENT;
 
 	mutex_lock(&cld->cld_lock);
@@ -455,7 +455,7 @@ int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data)
 
 	spin_lock(&config_list_lock);
 	list_for_each_entry(cld, &config_llog_list, cld_list_chain) {
-		if (cld->cld_recover == NULL)
+		if (!cld->cld_recover)
 			continue;
 		seq_printf(m,  "    - { client: %s, nidtbl_version: %u }\n",
 			       cld->cld_logname,
@@ -883,7 +883,7 @@ static int mgc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_LDLM_ENQUEUE, LUSTRE_DLM_VERSION,
 					LDLM_ENQUEUE);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, 0);
@@ -921,7 +921,7 @@ static int mgc_target_register(struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_MGS_TARGET_REG, LUSTRE_MGS_VERSION,
 					MGS_TARGET_REG);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_mti = req_capsule_client_get(&req->rq_pill, &RMF_MGS_TARGET_INFO);
@@ -1109,7 +1109,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 	int   rc  = 0;
 	int   off = 0;
 
-	LASSERT(cfg->cfg_instance != NULL);
+	LASSERT(cfg->cfg_instance);
 	LASSERT(cfg->cfg_sb == cfg->cfg_instance);
 
 	inst = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
@@ -1195,7 +1195,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 		/* lustre-OST0001-osc-<instance #> */
 		strcpy(obdname, cld->cld_logname);
 		cname = strrchr(obdname, '-');
-		if (cname == NULL) {
+		if (!cname) {
 			CERROR("mgc %s: invalid logname %s\n",
 			       mgc->obd_name, obdname);
 			break;
@@ -1212,7 +1212,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 
 		/* find the obd by obdname */
 		obd = class_name2obd(obdname);
-		if (obd == NULL) {
+		if (!obd) {
 			CDEBUG(D_INFO, "mgc %s: cannot find obdname %s\n",
 			       mgc->obd_name, obdname);
 			rc = 0;
@@ -1227,7 +1227,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 		uuid = buf + pos;
 
 		down_read(&obd->u.cli.cl_sem);
-		if (obd->u.cli.cl_import == NULL) {
+		if (!obd->u.cli.cl_import) {
 			/* client does not connect to the OST yet */
 			up_read(&obd->u.cli.cl_sem);
 			rc = 0;
@@ -1257,7 +1257,7 @@ static int mgc_apply_recover_logs(struct obd_device *mgc,
 
 		rc = -ENOMEM;
 		lcfg = lustre_cfg_new(LCFG_PARAM, &bufs);
-		if (lcfg == NULL) {
+		if (!lcfg) {
 			CERROR("mgc: cannot allocate memory\n");
 			break;
 		}
@@ -1309,14 +1309,14 @@ static int mgc_process_recover_log(struct obd_device *obd,
 		nrpages = CONFIG_READ_NRPAGES_INIT;
 
 	pages = kcalloc(nrpages, sizeof(*pages), GFP_KERNEL);
-	if (pages == NULL) {
+	if (!pages) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	for (i = 0; i < nrpages; i++) {
 		pages[i] = alloc_page(GFP_KERNEL);
-		if (pages[i] == NULL) {
+		if (!pages[i]) {
 			rc = -ENOMEM;
 			goto out;
 		}
@@ -1327,7 +1327,7 @@ again:
 	LASSERT(mutex_is_locked(&cld->cld_lock));
 	req = ptlrpc_request_alloc(class_exp2cliimp(cld->cld_mgcexp),
 				   &RQF_MGS_CONFIG_READ);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1338,7 +1338,6 @@ again:
 
 	/* pack request */
 	body = req_capsule_client_get(&req->rq_pill, &RMF_MGS_CONFIG_BODY);
-	LASSERT(body != NULL);
 	LASSERT(sizeof(body->mcb_name) > strlen(cld->cld_logname));
 	if (strlcpy(body->mcb_name, cld->cld_logname, sizeof(body->mcb_name))
 	    >= sizeof(body->mcb_name)) {
@@ -1353,7 +1352,7 @@ again:
 	/* allocate bulk transfer descriptor */
 	desc = ptlrpc_prep_bulk_imp(req, nrpages, 1, BULK_PUT_SINK,
 				    MGS_BULK_PORTAL);
-	if (desc == NULL) {
+	if (!desc) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1434,7 +1433,7 @@ out:
 
 	if (pages) {
 		for (i = 0; i < nrpages; i++) {
-			if (pages[i] == NULL)
+			if (!pages[i])
 				break;
 			__free_page(pages[i]);
 		}
@@ -1635,7 +1634,7 @@ static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
 		if (rc)
 			break;
 		cld = config_log_find(logname, cfg);
-		if (cld == NULL) {
+		if (!cld) {
 			rc = -ENOENT;
 			break;
 		}
@@ -1646,7 +1645,7 @@ static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
 		cld->cld_cfg.cfg_flags |= CFG_F_COMPAT146;
 
 		rc = mgc_process_log(obd, cld);
-		if (rc == 0 && cld->cld_recover != NULL) {
+		if (rc == 0 && cld->cld_recover) {
 			if (OCD_HAS_FLAG(&obd->u.cli.cl_import->
 					 imp_connect_data, IMP_RECOV)) {
 				rc = mgc_process_log(obd, cld->cld_recover);
@@ -1660,7 +1659,7 @@ static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
 				CERROR("Cannot process recover llog %d\n", rc);
 		}
 
-		if (rc == 0 && cld->cld_params != NULL) {
+		if (rc == 0 && cld->cld_params) {
 			rc = mgc_process_log(obd, cld->cld_params);
 			if (rc == -ENOENT) {
 				CDEBUG(D_MGC,
-- 
2.1.0

[PATCH 23/45] staging/lustre/obdclass: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/obdclass/acl.c       | 10 +--
 drivers/staging/lustre/lustre/obdclass/cl_io.c     | 83 +++++++++---------
 drivers/staging/lustre/lustre/obdclass/cl_lock.c   | 47 +++++------
 drivers/staging/lustre/lustre/obdclass/cl_object.c | 40 +++++----
 drivers/staging/lustre/lustre/obdclass/cl_page.c   | 97 +++++++++++-----------
 drivers/staging/lustre/lustre/obdclass/class_obd.c |  4 +-
 drivers/staging/lustre/lustre/obdclass/genops.c    | 29 +++----
 .../lustre/lustre/obdclass/linux/linux-module.c    |  5 +-
 drivers/staging/lustre/lustre/obdclass/llog.c      | 18 ++--
 drivers/staging/lustre/lustre/obdclass/llog_cat.c  |  2 +-
 drivers/staging/lustre/lustre/obdclass/llog_obd.c  |  7 +-
 .../lustre/lustre/obdclass/lprocfs_counters.c      |  4 +-
 .../lustre/lustre/obdclass/lprocfs_status.c        | 56 ++++++-------
 drivers/staging/lustre/lustre/obdclass/lu_object.c | 94 ++++++++++-----------
 .../lustre/lustre/obdclass/lustre_handles.c        | 12 +--
 .../staging/lustre/lustre/obdclass/lustre_peer.c   |  4 +-
 .../staging/lustre/lustre/obdclass/obd_config.c    | 12 +--
 drivers/staging/lustre/lustre/obdclass/obd_mount.c | 37 ++++-----
 18 files changed, 267 insertions(+), 294 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/acl.c b/drivers/staging/lustre/lustre/obdclass/acl.c
index 49ba885..0e02ae9 100644
--- a/drivers/staging/lustre/lustre/obdclass/acl.c
+++ b/drivers/staging/lustre/lustre/obdclass/acl.c
@@ -104,7 +104,7 @@ static int lustre_posix_acl_xattr_reduce_space(posix_acl_xattr_header **header,
 		return old_size;
 
 	new = kmemdup(*header, new_size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return -ENOMEM;
 
 	kfree(*header);
@@ -124,7 +124,7 @@ static int lustre_ext_acl_xattr_reduce_space(ext_acl_xattr_header **header,
 		return 0;
 
 	new = kmemdup(*header, ext_size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return -ENOMEM;
 
 	kfree(*header);
@@ -149,7 +149,7 @@ lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size)
 		count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr);
 	esize = CFS_ACL_XATTR_SIZE(count, ext_acl_xattr);
 	new = kzalloc(esize, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return ERR_PTR(-ENOMEM);
 
 	new->a_count = cpu_to_le32(count);
@@ -180,7 +180,7 @@ int lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, size_t size,
 		return -EINVAL;
 
 	new = kzalloc(size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return -ENOMEM;
 
 	new->a_version = cpu_to_le32(CFS_ACL_XATTR_VERSION);
@@ -300,7 +300,7 @@ lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size,
 	ext_size = CFS_ACL_XATTR_SIZE(ext_count, ext_acl_xattr);
 
 	new = kzalloc(ext_size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return ERR_PTR(-ENOMEM);
 
 	for (i = 0, j = 0; i < posix_count; i++) {
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_io.c b/drivers/staging/lustre/lustre/obdclass/cl_io.c
index 63246ba..58b46a7 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_io.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_io.c
@@ -93,7 +93,7 @@ static int cl_io_invariant(const struct cl_io *io)
 		 * CIS_IO_GOING.
 		 */
 		ergo(io->ci_owned_nr > 0, io->ci_state == CIS_IO_GOING ||
-		     (io->ci_state == CIS_LOCKED && up != NULL));
+		     (io->ci_state == CIS_LOCKED && up));
 }
 
 /**
@@ -111,7 +111,7 @@ void cl_io_fini(const struct lu_env *env, struct cl_io *io)
 		slice = container_of(io->ci_layers.prev, struct cl_io_slice,
 				     cis_linkage);
 		list_del_init(&slice->cis_linkage);
-		if (slice->cis_iop->op[io->ci_type].cio_fini != NULL)
+		if (slice->cis_iop->op[io->ci_type].cio_fini)
 			slice->cis_iop->op[io->ci_type].cio_fini(env, slice);
 		/*
 		 * Invalidate slice to catch use after free. This assumes that
@@ -164,7 +164,7 @@ static int cl_io_init0(const struct lu_env *env, struct cl_io *io,
 
 	result = 0;
 	cl_object_for_each(scan, obj) {
-		if (scan->co_ops->coo_io_init != NULL) {
+		if (scan->co_ops->coo_io_init) {
 			result = scan->co_ops->coo_io_init(env, scan, io);
 			if (result != 0)
 				break;
@@ -186,7 +186,7 @@ int cl_io_sub_init(const struct lu_env *env, struct cl_io *io,
 	struct cl_thread_info *info = cl_env_info(env);
 
 	LASSERT(obj != cl_object_top(obj));
-	if (info->clt_current_io == NULL)
+	if (!info->clt_current_io)
 		info->clt_current_io = io;
 	return cl_io_init0(env, io, iot, obj);
 }
@@ -208,7 +208,7 @@ int cl_io_init(const struct lu_env *env, struct cl_io *io,
 	struct cl_thread_info *info = cl_env_info(env);
 
 	LASSERT(obj == cl_object_top(obj));
-	LASSERT(info->clt_current_io == NULL);
+	LASSERT(!info->clt_current_io);
 
 	info->clt_current_io = io;
 	return cl_io_init0(env, io, iot, obj);
@@ -224,7 +224,7 @@ int cl_io_rw_init(const struct lu_env *env, struct cl_io *io,
 		  enum cl_io_type iot, loff_t pos, size_t count)
 {
 	LINVRNT(iot == CIT_READ || iot == CIT_WRITE);
-	LINVRNT(io->ci_obj != NULL);
+	LINVRNT(io->ci_obj);
 
 	LU_OBJECT_HEADER(D_VFSTRACE, env, &io->ci_obj->co_lu,
 			 "io range: %u [%llu, %llu) %u %u\n",
@@ -292,7 +292,7 @@ static void cl_io_locks_sort(struct cl_io *io)
 		list_for_each_entry_safe(curr, temp,
 					     &io->ci_lockset.cls_todo,
 					     cill_linkage) {
-			if (prev != NULL) {
+			if (prev) {
 				switch (cl_lock_descr_sort(&prev->cill_descr,
 							  &curr->cill_descr)) {
 				case 0:
@@ -399,11 +399,11 @@ static void cl_lock_link_fini(const struct lu_env *env, struct cl_io *io,
 	struct cl_lock *lock = link->cill_lock;
 
 	list_del_init(&link->cill_linkage);
-	if (lock != NULL) {
+	if (lock) {
 		cl_lock_release(env, lock, "io", io);
 		link->cill_lock = NULL;
 	}
-	if (link->cill_fini != NULL)
+	if (link->cill_fini)
 		link->cill_fini(env, link);
 }
 
@@ -458,7 +458,7 @@ int cl_io_lock(const struct lu_env *env, struct cl_io *io)
 	LINVRNT(cl_io_invariant(io));
 
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_lock == NULL)
+		if (!scan->cis_iop->op[io->ci_type].cio_lock)
 			continue;
 		result = scan->cis_iop->op[io->ci_type].cio_lock(env, scan);
 		if (result != 0)
@@ -503,7 +503,7 @@ void cl_io_unlock(const struct lu_env *env, struct cl_io *io)
 		cl_lock_link_fini(env, io, link);
 	}
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_unlock != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_unlock)
 			scan->cis_iop->op[io->ci_type].cio_unlock(env, scan);
 	}
 	io->ci_state = CIS_UNLOCKED;
@@ -529,7 +529,7 @@ int cl_io_iter_init(const struct lu_env *env, struct cl_io *io)
 
 	result = 0;
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_iter_init == NULL)
+		if (!scan->cis_iop->op[io->ci_type].cio_iter_init)
 			continue;
 		result = scan->cis_iop->op[io->ci_type].cio_iter_init(env,
 								      scan);
@@ -556,7 +556,7 @@ void cl_io_iter_fini(const struct lu_env *env, struct cl_io *io)
 	LINVRNT(cl_io_invariant(io));
 
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_iter_fini != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_iter_fini)
 			scan->cis_iop->op[io->ci_type].cio_iter_fini(env, scan);
 	}
 	io->ci_state = CIS_IT_ENDED;
@@ -581,7 +581,7 @@ static void cl_io_rw_advance(const struct lu_env *env, struct cl_io *io,
 
 	/* layers have to be notified. */
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_advance != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_advance)
 			scan->cis_iop->op[io->ci_type].cio_advance(env, scan,
 								   nob);
 	}
@@ -621,7 +621,7 @@ int cl_io_lock_alloc_add(const struct lu_env *env, struct cl_io *io,
 	int result;
 
 	link = kzalloc(sizeof(*link), GFP_NOFS);
-	if (link != NULL) {
+	if (link) {
 		link->cill_descr     = *descr;
 		link->cill_fini      = cl_free_io_lock_link;
 		result = cl_io_lock_add(env, io, link);
@@ -648,7 +648,7 @@ int cl_io_start(const struct lu_env *env, struct cl_io *io)
 
 	io->ci_state = CIS_IO_GOING;
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_start == NULL)
+		if (!scan->cis_iop->op[io->ci_type].cio_start)
 			continue;
 		result = scan->cis_iop->op[io->ci_type].cio_start(env, scan);
 		if (result != 0)
@@ -673,7 +673,7 @@ void cl_io_end(const struct lu_env *env, struct cl_io *io)
 	LINVRNT(cl_io_invariant(io));
 
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_end != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_end)
 			scan->cis_iop->op[io->ci_type].cio_end(env, scan);
 		/* TODO: error handling. */
 	}
@@ -687,7 +687,7 @@ cl_io_slice_page(const struct cl_io_slice *ios, struct cl_page *page)
 	const struct cl_page_slice *slice;
 
 	slice = cl_page_at(page, ios->cis_obj->co_lu.lo_dev->ld_type);
-	LINVRNT(slice != NULL);
+	LINVRNT(slice);
 	return slice;
 }
 
@@ -759,11 +759,11 @@ int cl_io_read_page(const struct lu_env *env, struct cl_io *io,
 	 * "parallel io" (see CLO_REPEAT loops in cl_lock.c).
 	 */
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->cio_read_page != NULL) {
+		if (scan->cis_iop->cio_read_page) {
 			const struct cl_page_slice *slice;
 
 			slice = cl_io_slice_page(scan, page);
-			LINVRNT(slice != NULL);
+			LINVRNT(slice);
 			result = scan->cis_iop->cio_read_page(env, scan, slice);
 			if (result != 0)
 				break;
@@ -798,7 +798,7 @@ int cl_io_prepare_write(const struct lu_env *env, struct cl_io *io,
 	LASSERT(cl_page_in_io(page, io));
 
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->cio_prepare_write != NULL) {
+		if (scan->cis_iop->cio_prepare_write) {
 			const struct cl_page_slice *slice;
 
 			slice = cl_io_slice_page(scan, page);
@@ -833,11 +833,11 @@ int cl_io_commit_write(const struct lu_env *env, struct cl_io *io,
 	 * state. Better (and more general) way of dealing with such situation
 	 * is needed.
 	 */
-	LASSERT(cl_page_is_owned(page, io) || page->cp_parent != NULL);
+	LASSERT(cl_page_is_owned(page, io) || page->cp_parent);
 	LASSERT(cl_page_in_io(page, io));
 
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->cio_commit_write != NULL) {
+		if (scan->cis_iop->cio_commit_write) {
 			const struct cl_page_slice *slice;
 
 			slice = cl_io_slice_page(scan, page);
@@ -872,7 +872,7 @@ int cl_io_submit_rw(const struct lu_env *env, struct cl_io *io,
 	LINVRNT(crt < ARRAY_SIZE(scan->cis_iop->req_op));
 
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->req_op[crt].cio_submit == NULL)
+		if (!scan->cis_iop->req_op[crt].cio_submit)
 			continue;
 		result = scan->cis_iop->req_op[crt].cio_submit(env, scan, crt,
 							       queue);
@@ -900,7 +900,7 @@ int cl_io_submit_sync(const struct lu_env *env, struct cl_io *io,
 	int rc;
 
 	cl_page_list_for_each(pg, &queue->c2_qin) {
-		LASSERT(pg->cp_sync_io == NULL);
+		LASSERT(!pg->cp_sync_io);
 		pg->cp_sync_io = anchor;
 	}
 
@@ -1026,7 +1026,7 @@ void cl_io_slice_add(struct cl_io *io, struct cl_io_slice *slice,
 {
 	struct list_head *linkage = &slice->cis_linkage;
 
-	LASSERT((linkage->prev == NULL && linkage->next == NULL) ||
+	LASSERT((!linkage->prev && !linkage->next) ||
 		list_empty(linkage));
 
 	list_add_tail(linkage, &io->ci_layers);
@@ -1054,7 +1054,7 @@ void cl_page_list_add(struct cl_page_list *plist, struct cl_page *page)
 {
 	/* it would be better to check that page is owned by "current" io, but
 	 * it is not passed here. */
-	LASSERT(page->cp_owner != NULL);
+	LASSERT(page->cp_owner);
 	LINVRNT(plist->pl_owner == current);
 
 	lockdep_off();
@@ -1263,7 +1263,7 @@ EXPORT_SYMBOL(cl_2queue_init_page);
  */
 struct cl_io *cl_io_top(struct cl_io *io)
 {
-	while (io->ci_parent != NULL)
+	while (io->ci_parent)
 		io = io->ci_parent;
 	return io;
 }
@@ -1296,13 +1296,13 @@ static void cl_req_free(const struct lu_env *env, struct cl_req *req)
 	LASSERT(list_empty(&req->crq_pages));
 	LASSERT(req->crq_nrpages == 0);
 	LINVRNT(list_empty(&req->crq_layers));
-	LINVRNT(equi(req->crq_nrobjs > 0, req->crq_o != NULL));
+	LINVRNT(equi(req->crq_nrobjs > 0, req->crq_o));
 
-	if (req->crq_o != NULL) {
+	if (req->crq_o) {
 		for (i = 0; i < req->crq_nrobjs; ++i) {
 			struct cl_object *obj = req->crq_o[i].ro_obj;
 
-			if (obj != NULL) {
+			if (obj) {
 				lu_object_ref_del_at(&obj->co_lu,
 						     &req->crq_o[i].ro_obj_ref,
 						     "cl_req", req);
@@ -1326,7 +1326,7 @@ static int cl_req_init(const struct lu_env *env, struct cl_req *req,
 	do {
 		list_for_each_entry(slice, &page->cp_layers, cpl_linkage) {
 			dev = lu2cl_dev(slice->cpl_obj->co_lu.lo_dev);
-			if (dev->cd_ops->cdo_req_init != NULL) {
+			if (dev->cd_ops->cdo_req_init) {
 				result = dev->cd_ops->cdo_req_init(env,
 								   dev, req);
 				if (result != 0)
@@ -1334,7 +1334,7 @@ static int cl_req_init(const struct lu_env *env, struct cl_req *req,
 			}
 		}
 		page = page->cp_child;
-	} while (page != NULL && result == 0);
+	} while (page && result == 0);
 	return result;
 }
 
@@ -1353,7 +1353,7 @@ void cl_req_completion(const struct lu_env *env, struct cl_req *req, int rc)
 		slice = list_entry(req->crq_layers.prev,
 				       struct cl_req_slice, crs_linkage);
 		list_del_init(&slice->crs_linkage);
-		if (slice->crs_ops->cro_completion != NULL)
+		if (slice->crs_ops->cro_completion)
 			slice->crs_ops->cro_completion(env, slice, rc);
 	}
 	cl_req_free(env, req);
@@ -1371,7 +1371,7 @@ struct cl_req *cl_req_alloc(const struct lu_env *env, struct cl_page *page,
 	LINVRNT(nr_objects > 0);
 
 	req = kzalloc(sizeof(*req), GFP_NOFS);
-	if (req != NULL) {
+	if (req) {
 		int result;
 
 		req->crq_type = crt;
@@ -1380,7 +1380,7 @@ struct cl_req *cl_req_alloc(const struct lu_env *env, struct cl_page *page,
 
 		req->crq_o = kcalloc(nr_objects, sizeof(req->crq_o[0]),
 				     GFP_NOFS);
-		if (req->crq_o != NULL) {
+		if (req->crq_o) {
 			req->crq_nrobjs = nr_objects;
 			result = cl_req_init(env, req, page);
 		} else
@@ -1408,7 +1408,7 @@ void cl_req_page_add(const struct lu_env *env,
 	page = cl_page_top(page);
 
 	LASSERT(list_empty(&page->cp_flight));
-	LASSERT(page->cp_req == NULL);
+	LASSERT(!page->cp_req);
 
 	CL_PAGE_DEBUG(D_PAGE, env, page, "req %p, %d, %u\n",
 		      req, req->crq_type, req->crq_nrpages);
@@ -1418,7 +1418,7 @@ void cl_req_page_add(const struct lu_env *env,
 	page->cp_req = req;
 	obj = cl_object_top(page->cp_obj);
 	for (i = 0, rqo = req->crq_o; obj != rqo->ro_obj; ++i, ++rqo) {
-		if (rqo->ro_obj == NULL) {
+		if (!rqo->ro_obj) {
 			rqo->ro_obj = obj;
 			cl_object_get(obj);
 			lu_object_ref_add_at(&obj->co_lu, &rqo->ro_obj_ref,
@@ -1463,11 +1463,11 @@ int cl_req_prep(const struct lu_env *env, struct cl_req *req)
 	 * of objects.
 	 */
 	for (i = 0; i < req->crq_nrobjs; ++i)
-		LASSERT(req->crq_o[i].ro_obj != NULL);
+		LASSERT(req->crq_o[i].ro_obj);
 
 	result = 0;
 	list_for_each_entry(slice, &req->crq_layers, crs_linkage) {
-		if (slice->crs_ops->cro_prep != NULL) {
+		if (slice->crs_ops->cro_prep) {
 			result = slice->crs_ops->cro_prep(env, slice);
 			if (result != 0)
 				break;
@@ -1501,9 +1501,8 @@ void cl_req_attr_set(const struct lu_env *env, struct cl_req *req,
 
 			scan = cl_page_at(page,
 					  slice->crs_dev->cd_lu_dev.ld_type);
-			LASSERT(scan != NULL);
 			obj = scan->cpl_obj;
-			if (slice->crs_ops->cro_attr_set != NULL)
+			if (slice->crs_ops->cro_attr_set)
 				slice->crs_ops->cro_attr_set(env, slice, obj,
 							     attr + i, flags);
 		}
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_lock.c b/drivers/staging/lustre/lustre/obdclass/cl_lock.c
index 1836dc0..57cb100 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_lock.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_lock.c
@@ -96,7 +96,7 @@ static int cl_lock_invariant(const struct lu_env *env,
 
 	result = atomic_read(&lock->cll_ref) > 0 &&
 		cl_lock_invariant_trusted(env, lock);
-	if (!result && env != NULL)
+	if (!result && env)
 		CL_LOCK_DEBUG(D_ERROR, env, lock, "invariant broken");
 	return result;
 }
@@ -288,7 +288,7 @@ void cl_lock_put(const struct lu_env *env, struct cl_lock *lock)
 
 	LINVRNT(cl_lock_invariant(env, lock));
 	obj = lock->cll_descr.cld_obj;
-	LINVRNT(obj != NULL);
+	LINVRNT(obj);
 
 	CDEBUG(D_TRACE, "releasing reference: %d %p %lu\n",
 	       atomic_read(&lock->cll_ref), lock, RETIP);
@@ -362,7 +362,7 @@ static struct cl_lock *cl_lock_alloc(const struct lu_env *env,
 	struct lu_object_header *head;
 
 	lock = kmem_cache_alloc(cl_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lock != NULL) {
+	if (lock) {
 		atomic_set(&lock->cll_ref, 1);
 		lock->cll_descr = *descr;
 		lock->cll_state = CLS_NEW;
@@ -461,7 +461,7 @@ static int cl_lock_fits_into(const struct lu_env *env,
 
 	LINVRNT(cl_lock_invariant_trusted(env, lock));
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_fits_into != NULL &&
+		if (slice->cls_ops->clo_fits_into &&
 		    !slice->cls_ops->clo_fits_into(env, slice, need, io))
 			return 0;
 	}
@@ -524,14 +524,14 @@ static struct cl_lock *cl_lock_find(const struct lu_env *env,
 	lock = cl_lock_lookup(env, obj, io, need);
 	spin_unlock(&head->coh_lock_guard);
 
-	if (lock == NULL) {
+	if (!lock) {
 		lock = cl_lock_alloc(env, obj, io, need);
 		if (!IS_ERR(lock)) {
 			struct cl_lock *ghost;
 
 			spin_lock(&head->coh_lock_guard);
 			ghost = cl_lock_lookup(env, obj, io, need);
-			if (ghost == NULL) {
+			if (!ghost) {
 				cl_lock_get_trust(lock);
 				list_add_tail(&lock->cll_linkage,
 						  &head->coh_locks);
@@ -572,7 +572,7 @@ struct cl_lock *cl_lock_peek(const struct lu_env *env, const struct cl_io *io,
 		spin_lock(&head->coh_lock_guard);
 		lock = cl_lock_lookup(env, obj, io, need);
 		spin_unlock(&head->coh_lock_guard);
-		if (lock == NULL)
+		if (!lock)
 			return NULL;
 
 		cl_lock_mutex_get(env, lock);
@@ -584,7 +584,7 @@ struct cl_lock *cl_lock_peek(const struct lu_env *env, const struct cl_io *io,
 			cl_lock_put(env, lock);
 			lock = NULL;
 		}
-	} while (lock == NULL);
+	} while (!lock);
 
 	cl_lock_hold_add(env, lock, scope, source);
 	cl_lock_user_add(env, lock);
@@ -775,7 +775,7 @@ static void cl_lock_cancel0(const struct lu_env *env, struct cl_lock *lock)
 		lock->cll_flags |= CLF_CANCELLED;
 		list_for_each_entry_reverse(slice, &lock->cll_layers,
 						cls_linkage) {
-			if (slice->cls_ops->clo_cancel != NULL)
+			if (slice->cls_ops->clo_cancel)
 				slice->cls_ops->clo_cancel(env, slice);
 		}
 	}
@@ -812,7 +812,7 @@ static void cl_lock_delete0(const struct lu_env *env, struct cl_lock *lock)
 		 */
 		list_for_each_entry_reverse(slice, &lock->cll_layers,
 						cls_linkage) {
-			if (slice->cls_ops->clo_delete != NULL)
+			if (slice->cls_ops->clo_delete)
 				slice->cls_ops->clo_delete(env, slice);
 		}
 		/*
@@ -974,7 +974,7 @@ static void cl_lock_state_signal(const struct lu_env *env, struct cl_lock *lock,
 	LINVRNT(cl_lock_invariant(env, lock));
 
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage)
-		if (slice->cls_ops->clo_state != NULL)
+		if (slice->cls_ops->clo_state)
 			slice->cls_ops->clo_state(env, slice, state);
 	wake_up_all(&lock->cll_wq);
 }
@@ -1039,7 +1039,7 @@ static int cl_unuse_try_internal(const struct lu_env *env, struct cl_lock *lock)
 		result = -ENOSYS;
 		list_for_each_entry_reverse(slice, &lock->cll_layers,
 						cls_linkage) {
-			if (slice->cls_ops->clo_unuse != NULL) {
+			if (slice->cls_ops->clo_unuse) {
 				result = slice->cls_ops->clo_unuse(env, slice);
 				if (result != 0)
 					break;
@@ -1072,7 +1072,7 @@ int cl_use_try(const struct lu_env *env, struct cl_lock *lock, int atomic)
 	result = -ENOSYS;
 	state = cl_lock_intransit(env, lock);
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_use != NULL) {
+		if (slice->cls_ops->clo_use) {
 			result = slice->cls_ops->clo_use(env, slice);
 			if (result != 0)
 				break;
@@ -1125,7 +1125,7 @@ static int cl_enqueue_kick(const struct lu_env *env,
 
 	result = -ENOSYS;
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_enqueue != NULL) {
+		if (slice->cls_ops->clo_enqueue) {
 			result = slice->cls_ops->clo_enqueue(env,
 							     slice, io, flags);
 			if (result != 0)
@@ -1215,7 +1215,7 @@ int cl_lock_enqueue_wait(const struct lu_env *env,
 
 	LASSERT(cl_lock_is_mutexed(lock));
 	LASSERT(lock->cll_state == CLS_QUEUING);
-	LASSERT(lock->cll_conflict != NULL);
+	LASSERT(lock->cll_conflict);
 
 	conflict = lock->cll_conflict;
 	lock->cll_conflict = NULL;
@@ -1258,7 +1258,7 @@ static int cl_enqueue_locked(const struct lu_env *env, struct cl_lock *lock,
 	do {
 		result = cl_enqueue_try(env, lock, io, enqflags);
 		if (result == CLO_WAIT) {
-			if (lock->cll_conflict != NULL)
+			if (lock->cll_conflict)
 				result = cl_lock_enqueue_wait(env, lock, 1);
 			else
 				result = cl_lock_state_wait(env, lock);
@@ -1416,7 +1416,7 @@ int cl_wait_try(const struct lu_env *env, struct cl_lock *lock)
 
 		result = -ENOSYS;
 		list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-			if (slice->cls_ops->clo_wait != NULL) {
+			if (slice->cls_ops->clo_wait) {
 				result = slice->cls_ops->clo_wait(env, slice);
 				if (result != 0)
 					break;
@@ -1487,7 +1487,7 @@ unsigned long cl_lock_weigh(const struct lu_env *env, struct cl_lock *lock)
 
 	pound = 0;
 	list_for_each_entry_reverse(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_weigh != NULL) {
+		if (slice->cls_ops->clo_weigh) {
 			ounce = slice->cls_ops->clo_weigh(env, slice);
 			pound += ounce;
 			if (pound < ounce) /* over-weight^Wflow */
@@ -1523,7 +1523,7 @@ int cl_lock_modify(const struct lu_env *env, struct cl_lock *lock,
 	LINVRNT(cl_lock_invariant(env, lock));
 
 	list_for_each_entry_reverse(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_modify != NULL) {
+		if (slice->cls_ops->clo_modify) {
 			result = slice->cls_ops->clo_modify(env, slice, desc);
 			if (result != 0)
 				return result;
@@ -1584,7 +1584,7 @@ int cl_lock_closure_build(const struct lu_env *env, struct cl_lock *lock,
 	result = cl_lock_enclosure(env, lock, closure);
 	if (result == 0) {
 		list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-			if (slice->cls_ops->clo_closure != NULL) {
+			if (slice->cls_ops->clo_closure) {
 				result = slice->cls_ops->clo_closure(env, slice,
 								     closure);
 				if (result != 0)
@@ -1820,7 +1820,6 @@ static pgoff_t pgoff_at_lock(struct cl_page *page, struct cl_lock *lock)
 
 	dtype = lock->cll_descr.cld_obj->co_lu.lo_dev->ld_type;
 	slice = cl_page_at(page, dtype);
-	LASSERT(slice != NULL);
 	return slice->cpl_page->cp_index;
 }
 
@@ -1840,7 +1839,7 @@ static int check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
 		/* refresh non-overlapped index */
 		tmp = cl_lock_at_pgoff(env, lock->cll_descr.cld_obj, index,
 					lock, 1, 0);
-		if (tmp != NULL) {
+		if (tmp) {
 			/* Cache the first-non-overlapped index so as to skip
 			 * all pages within [index, clt_fn_index). This
 			 * is safe because if tmp lock is canceled, it will
@@ -1950,7 +1949,7 @@ void cl_locks_prune(const struct lu_env *env, struct cl_object *obj, int cancel)
 	 * already destroyed (as otherwise they will be left unprotected).
 	 */
 	LASSERT(ergo(!cancel,
-		     head->coh_tree.rnode == NULL && head->coh_pages == 0));
+		     !head->coh_tree.rnode && head->coh_pages == 0));
 
 	spin_lock(&head->coh_lock_guard);
 	while (!list_empty(&head->coh_locks)) {
@@ -2194,7 +2193,7 @@ void cl_lock_print(const struct lu_env *env, void *cookie,
 		(*printer)(env, cookie, "    %s@%p: ",
 			   slice->cls_obj->co_lu.lo_dev->ld_type->ldt_name,
 			   slice);
-		if (slice->cls_ops->clo_print != NULL)
+		if (slice->cls_ops->clo_print)
 			slice->cls_ops->clo_print(env, cookie, printer, slice);
 		(*printer)(env, cookie, "\n");
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c b/drivers/staging/lustre/lustre/obdclass/cl_object.c
index f118983..39b4fd0 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_object.c
@@ -152,7 +152,7 @@ struct cl_object *cl_object_top(struct cl_object *o)
 	struct cl_object_header *hdr = cl_object_header(o);
 	struct cl_object *top;
 
-	while (hdr->coh_parent != NULL)
+	while (hdr->coh_parent)
 		hdr = hdr->coh_parent;
 
 	top = lu2cl(lu_object_top(&hdr->coh_lu));
@@ -217,7 +217,7 @@ int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj,
 	top = obj->co_lu.lo_header;
 	result = 0;
 	list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
-		if (obj->co_ops->coo_attr_get != NULL) {
+		if (obj->co_ops->coo_attr_get) {
 			result = obj->co_ops->coo_attr_get(env, obj, attr);
 			if (result != 0) {
 				if (result > 0)
@@ -249,7 +249,7 @@ int cl_object_attr_set(const struct lu_env *env, struct cl_object *obj,
 	result = 0;
 	list_for_each_entry_reverse(obj, &top->loh_layers,
 					co_lu.lo_linkage) {
-		if (obj->co_ops->coo_attr_set != NULL) {
+		if (obj->co_ops->coo_attr_set) {
 			result = obj->co_ops->coo_attr_set(env, obj, attr, v);
 			if (result != 0) {
 				if (result > 0)
@@ -280,7 +280,7 @@ int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
 	result = 0;
 	list_for_each_entry_reverse(obj, &top->loh_layers,
 					co_lu.lo_linkage) {
-		if (obj->co_ops->coo_glimpse != NULL) {
+		if (obj->co_ops->coo_glimpse) {
 			result = obj->co_ops->coo_glimpse(env, obj, lvb);
 			if (result != 0)
 				break;
@@ -306,7 +306,7 @@ int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
 	top = obj->co_lu.lo_header;
 	result = 0;
 	list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
-		if (obj->co_ops->coo_conf_set != NULL) {
+		if (obj->co_ops->coo_conf_set) {
 			result = obj->co_ops->coo_conf_set(env, obj, conf);
 			if (result != 0)
 				break;
@@ -328,7 +328,7 @@ void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
 	struct cl_object_header *hdr;
 
 	hdr = cl_object_header(obj);
-	LASSERT(hdr->coh_tree.rnode == NULL);
+	LASSERT(!hdr->coh_tree.rnode);
 	LASSERT(hdr->coh_pages == 0);
 
 	set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
@@ -541,7 +541,7 @@ static void cl_env_init0(struct cl_env *cle, void *debug)
 {
 	LASSERT(cle->ce_ref == 0);
 	LASSERT(cle->ce_magic == &cl_env_init0);
-	LASSERT(cle->ce_debug == NULL && cle->ce_owner == NULL);
+	LASSERT(!cle->ce_debug && !cle->ce_owner);
 
 	cle->ce_ref = 1;
 	cle->ce_debug = debug;
@@ -576,7 +576,7 @@ static int cl_env_hops_keycmp(const void *key, struct hlist_node *hn)
 {
 	struct cl_env *cle = cl_env_hops_obj(hn);
 
-	LASSERT(cle->ce_owner != NULL);
+	LASSERT(cle->ce_owner);
 	return (key == cle->ce_owner);
 }
 
@@ -610,7 +610,7 @@ static inline void cl_env_attach(struct cl_env *cle)
 	if (cle) {
 		int rc;
 
-		LASSERT(cle->ce_owner == NULL);
+		LASSERT(!cle->ce_owner);
 		cle->ce_owner = (void *) (long) current->pid;
 		rc = cfs_hash_add_unique(cl_env_hash, cle->ce_owner,
 					 &cle->ce_node);
@@ -638,7 +638,7 @@ static int cl_env_store_init(void)
 				      CFS_HASH_MAX_THETA,
 				      &cl_env_hops,
 				      CFS_HASH_RW_BKTLOCK);
-	return cl_env_hash != NULL ? 0 : -ENOMEM;
+	return cl_env_hash ? 0 : -ENOMEM;
 }
 
 static void cl_env_store_fini(void)
@@ -648,7 +648,7 @@ static void cl_env_store_fini(void)
 
 static inline struct cl_env *cl_env_detach(struct cl_env *cle)
 {
-	if (cle == NULL)
+	if (!cle)
 		cle = cl_env_fetch();
 
 	if (cle && cle->ce_owner)
@@ -663,7 +663,7 @@ static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
 	struct cl_env *cle;
 
 	cle = kmem_cache_alloc(cl_env_kmem, GFP_NOFS | __GFP_ZERO);
-	if (cle != NULL) {
+	if (cle) {
 		int rc;
 
 		INIT_LIST_HEAD(&cle->ce_linkage);
@@ -717,7 +717,7 @@ static struct lu_env *cl_env_peek(int *refcheck)
 
 	env = NULL;
 	cle = cl_env_fetch();
-	if (cle != NULL) {
+	if (cle) {
 		CL_ENV_INC(hit);
 		env = &cle->ce_lu;
 		*refcheck = ++cle->ce_ref;
@@ -742,7 +742,7 @@ struct lu_env *cl_env_get(int *refcheck)
 	struct lu_env *env;
 
 	env = cl_env_peek(refcheck);
-	if (env == NULL) {
+	if (!env) {
 		env = cl_env_new(lu_context_tags_default,
 				 lu_session_tags_default,
 				 __builtin_return_address(0));
@@ -769,7 +769,7 @@ struct lu_env *cl_env_alloc(int *refcheck, __u32 tags)
 {
 	struct lu_env *env;
 
-	LASSERT(cl_env_peek(refcheck) == NULL);
+	LASSERT(!cl_env_peek(refcheck));
 	env = cl_env_new(tags, tags, __builtin_return_address(0));
 	if (!IS_ERR(env)) {
 		struct cl_env *cle;
@@ -784,7 +784,7 @@ EXPORT_SYMBOL(cl_env_alloc);
 
 static void cl_env_exit(struct cl_env *cle)
 {
-	LASSERT(cle->ce_owner == NULL);
+	LASSERT(!cle->ce_owner);
 	lu_context_exit(&cle->ce_lu.le_ctx);
 	lu_context_exit(&cle->ce_ses);
 }
@@ -803,7 +803,7 @@ void cl_env_put(struct lu_env *env, int *refcheck)
 	cle = cl_env_container(env);
 
 	LASSERT(cle->ce_ref > 0);
-	LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
+	LASSERT(ergo(refcheck, cle->ce_ref == *refcheck));
 
 	CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
 	if (--cle->ce_ref == 0) {
@@ -878,7 +878,7 @@ struct lu_env *cl_env_nested_get(struct cl_env_nest *nest)
 
 	nest->cen_cookie = NULL;
 	env = cl_env_peek(&nest->cen_refcheck);
-	if (env != NULL) {
+	if (env) {
 		if (!cl_io_is_going(env))
 			return env;
 		cl_env_put(env, &nest->cen_refcheck);
@@ -930,14 +930,12 @@ struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
 	const char       *typename;
 	struct lu_device *d;
 
-	LASSERT(ldt != NULL);
-
 	typename = ldt->ldt_name;
 	d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
 	if (!IS_ERR(d)) {
 		int rc;
 
-		if (site != NULL)
+		if (site)
 			d->ld_site = site;
 		rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
 		if (rc == 0) {
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_page.c b/drivers/staging/lustre/lustre/obdclass/cl_page.c
index 61f28eb..72f9924 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_page.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_page.c
@@ -69,7 +69,7 @@ static void cl_page_delete0(const struct lu_env *env, struct cl_page *pg,
  */
 static struct cl_page *cl_page_top_trusted(struct cl_page *page)
 {
-	while (page->cp_parent != NULL)
+	while (page->cp_parent)
 		page = page->cp_parent;
 	return page;
 }
@@ -110,7 +110,7 @@ cl_page_at_trusted(const struct cl_page *page,
 				return slice;
 		}
 		page = page->cp_child;
-	} while (page != NULL);
+	} while (page);
 	return NULL;
 }
 
@@ -127,7 +127,7 @@ struct cl_page *cl_page_lookup(struct cl_object_header *hdr, pgoff_t index)
 	assert_spin_locked(&hdr->coh_page_guard);
 
 	page = radix_tree_lookup(&hdr->coh_tree, index);
-	if (page != NULL)
+	if (page)
 		cl_page_get_trust(page);
 	return page;
 }
@@ -188,7 +188,7 @@ int cl_page_gang_lookup(const struct lu_env *env, struct cl_object *obj,
 			 * Pages for lsm-less file has no underneath sub-page
 			 * for osc, in case of ...
 			 */
-			PASSERT(env, page, slice != NULL);
+			PASSERT(env, page, slice);
 
 			page = slice->cpl_page;
 			/*
@@ -245,9 +245,9 @@ static void cl_page_free(const struct lu_env *env, struct cl_page *page)
 	struct cl_object *obj  = page->cp_obj;
 
 	PASSERT(env, page, list_empty(&page->cp_batch));
-	PASSERT(env, page, page->cp_owner == NULL);
-	PASSERT(env, page, page->cp_req == NULL);
-	PASSERT(env, page, page->cp_parent == NULL);
+	PASSERT(env, page, !page->cp_owner);
+	PASSERT(env, page, !page->cp_req);
+	PASSERT(env, page, !page->cp_parent);
 	PASSERT(env, page, page->cp_state == CPS_FREEING);
 
 	might_sleep();
@@ -284,7 +284,7 @@ static struct cl_page *cl_page_alloc(const struct lu_env *env,
 	struct lu_object_header *head;
 
 	page = kzalloc(cl_object_header(o)->coh_page_bufsize, GFP_NOFS);
-	if (page != NULL) {
+	if (page) {
 		int result = 0;
 
 		atomic_set(&page->cp_ref, 1);
@@ -305,7 +305,7 @@ static struct cl_page *cl_page_alloc(const struct lu_env *env,
 		head = o->co_lu.lo_header;
 		list_for_each_entry(o, &head->loh_layers,
 					co_lu.lo_linkage) {
-			if (o->co_ops->coo_page_init != NULL) {
+			if (o->co_ops->coo_page_init) {
 				result = o->co_ops->coo_page_init(env, o,
 								  page, vmpage);
 				if (result != 0) {
@@ -369,13 +369,13 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 		 */
 		page = cl_vmpage_page(vmpage, o);
 		PINVRNT(env, page,
-			ergo(page != NULL,
+			ergo(page,
 			     cl_page_vmpage(env, page) == vmpage &&
 			     (void *)radix_tree_lookup(&hdr->coh_tree,
 						       idx) == page));
 	}
 
-	if (page != NULL)
+	if (page)
 		return page;
 
 	/* allocate and initialize cl_page */
@@ -385,7 +385,7 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 
 	if (type == CPT_TRANSIENT) {
 		if (parent) {
-			LASSERT(page->cp_parent == NULL);
+			LASSERT(!page->cp_parent);
 			page->cp_parent = parent;
 			parent->cp_child = page;
 		}
@@ -418,7 +418,7 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 			      "fail to insert into radix tree: %d\n", err);
 	} else {
 		if (parent) {
-			LASSERT(page->cp_parent == NULL);
+			LASSERT(!page->cp_parent);
 			page->cp_parent = parent;
 			parent->cp_child = page;
 		}
@@ -426,7 +426,7 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 	}
 	spin_unlock(&hdr->coh_page_guard);
 
-	if (unlikely(ghost != NULL)) {
+	if (unlikely(ghost)) {
 		cl_page_delete0(env, ghost, 0);
 		cl_page_free(env, ghost);
 	}
@@ -467,14 +467,13 @@ static inline int cl_page_invariant(const struct cl_page *pg)
 	owner  = pg->cp_owner;
 
 	return cl_page_in_use(pg) &&
-		ergo(parent != NULL, parent->cp_child == pg) &&
-		ergo(child != NULL, child->cp_parent == pg) &&
-		ergo(child != NULL, pg->cp_obj != child->cp_obj) &&
-		ergo(parent != NULL, pg->cp_obj != parent->cp_obj) &&
-		ergo(owner != NULL && parent != NULL,
+		ergo(parent, parent->cp_child == pg) &&
+		ergo(child, child->cp_parent == pg) &&
+		ergo(child, pg->cp_obj != child->cp_obj) &&
+		ergo(parent, pg->cp_obj != parent->cp_obj) &&
+		ergo(owner && parent,
 		     parent->cp_owner == pg->cp_owner->ci_parent) &&
-		ergo(owner != NULL && child != NULL,
-		     child->cp_owner->ci_parent == owner) &&
+		ergo(owner && child, child->cp_owner->ci_parent == owner) &&
 		/*
 		 * Either page is early in initialization (has neither child
 		 * nor parent yet), or it is in the object radix tree.
@@ -482,7 +481,7 @@ static inline int cl_page_invariant(const struct cl_page *pg)
 		ergo(pg->cp_state < CPS_FREEING && pg->cp_type == CPT_CACHEABLE,
 		     (void *)radix_tree_lookup(&header->coh_tree,
 					       pg->cp_index) == pg ||
-		     (child == NULL && parent == NULL));
+		     (!child && !parent));
 }
 
 static void cl_page_state_set0(const struct lu_env *env,
@@ -535,10 +534,10 @@ static void cl_page_state_set0(const struct lu_env *env,
 	old = page->cp_state;
 	PASSERT(env, page, allowed_transitions[old][state]);
 	CL_PAGE_HEADER(D_TRACE, env, page, "%d -> %d\n", old, state);
-	for (; page != NULL; page = page->cp_child) {
+	for (; page; page = page->cp_child) {
 		PASSERT(env, page, page->cp_state == old);
 		PASSERT(env, page,
-			equi(state == CPS_OWNED, page->cp_owner != NULL));
+			equi(state == CPS_OWNED, page->cp_owner));
 
 		cl_page_state_set_trust(page, state);
 	}
@@ -584,7 +583,7 @@ void cl_page_put(const struct lu_env *env, struct cl_page *page)
 		LASSERT(page->cp_state == CPS_FREEING);
 
 		LASSERT(atomic_read(&page->cp_ref) == 0);
-		PASSERT(env, page, page->cp_owner == NULL);
+		PASSERT(env, page, !page->cp_owner);
 		PASSERT(env, page, list_empty(&page->cp_batch));
 		/*
 		 * Page is no longer reachable by other threads. Tear
@@ -609,11 +608,11 @@ struct page *cl_page_vmpage(const struct lu_env *env, struct cl_page *page)
 	page = cl_page_top(page);
 	do {
 		list_for_each_entry(slice, &page->cp_layers, cpl_linkage) {
-			if (slice->cpl_ops->cpo_vmpage != NULL)
+			if (slice->cpl_ops->cpo_vmpage)
 				return slice->cpl_ops->cpo_vmpage(env, slice);
 		}
 		page = page->cp_child;
-	} while (page != NULL);
+	} while (page);
 	LBUG(); /* ->cpo_vmpage() has to be defined somewhere in the stack */
 }
 EXPORT_SYMBOL(cl_page_vmpage);
@@ -639,10 +638,10 @@ struct cl_page *cl_vmpage_page(struct page *vmpage, struct cl_object *obj)
 	 * can be rectified easily.
 	 */
 	top = (struct cl_page *)vmpage->private;
-	if (top == NULL)
+	if (!top)
 		return NULL;
 
-	for (page = top; page != NULL; page = page->cp_child) {
+	for (page = top; page; page = page->cp_child) {
 		if (cl_object_same(page->cp_obj, obj)) {
 			cl_page_get_trust(page);
 			break;
@@ -689,7 +688,7 @@ EXPORT_SYMBOL(cl_page_at);
 					cpl_linkage) {		  \
 			__method = *(void **)((char *)__scan->cpl_ops + \
 					      __op);		    \
-			if (__method != NULL) {			 \
+			if (__method) {					\
 				__result = (*__method)(__env, __scan,   \
 						       ## __VA_ARGS__); \
 				if (__result != 0)		      \
@@ -697,7 +696,7 @@ EXPORT_SYMBOL(cl_page_at);
 			}					       \
 		}						       \
 		__page = __page->cp_child;			      \
-	} while (__page != NULL && __result == 0);		      \
+	} while (__page && __result == 0);			      \
 	if (__result > 0)					       \
 		__result = 0;					   \
 	__result;						       \
@@ -717,12 +716,12 @@ do {								    \
 					cpl_linkage) {		  \
 			__method = *(void **)((char *)__scan->cpl_ops + \
 					      __op);		    \
-			if (__method != NULL)			   \
+			if (__method)				   \
 				(*__method)(__env, __scan,	      \
 					    ## __VA_ARGS__);	    \
 		}						       \
 		__page = __page->cp_child;			      \
-	} while (__page != NULL);				       \
+	} while (__page);					       \
 } while (0)
 
 #define CL_PAGE_INVOID_REVERSE(_env, _page, _op, _proto, ...)	       \
@@ -734,19 +733,19 @@ do {									\
 	void		      (*__method)_proto;			\
 									    \
 	/* get to the bottom page. */				       \
-	while (__page->cp_child != NULL)				    \
+	while (__page->cp_child)					    \
 		__page = __page->cp_child;				  \
 	do {								\
 		list_for_each_entry_reverse(__scan, &__page->cp_layers, \
 						cpl_linkage) {	      \
 			__method = *(void **)((char *)__scan->cpl_ops +     \
 					      __op);			\
-			if (__method != NULL)			       \
+			if (__method)				       \
 				(*__method)(__env, __scan,		  \
 					    ## __VA_ARGS__);		\
 		}							   \
 		__page = __page->cp_parent;				 \
-	} while (__page != NULL);					   \
+	} while (__page);						   \
 } while (0)
 
 static int cl_page_invoke(const struct lu_env *env,
@@ -772,8 +771,8 @@ static void cl_page_invoid(const struct lu_env *env,
 
 static void cl_page_owner_clear(struct cl_page *page)
 {
-	for (page = cl_page_top(page); page != NULL; page = page->cp_child) {
-		if (page->cp_owner != NULL) {
+	for (page = cl_page_top(page); page; page = page->cp_child) {
+		if (page->cp_owner) {
 			LASSERT(page->cp_owner->ci_owned_nr > 0);
 			page->cp_owner->ci_owned_nr--;
 			page->cp_owner = NULL;
@@ -784,10 +783,8 @@ static void cl_page_owner_clear(struct cl_page *page)
 
 static void cl_page_owner_set(struct cl_page *page)
 {
-	for (page = cl_page_top(page); page != NULL; page = page->cp_child) {
-		LASSERT(page->cp_owner != NULL);
+	for (page = cl_page_top(page); page; page = page->cp_child)
 		page->cp_owner->ci_owned_nr++;
-	}
 }
 
 void cl_page_disown0(const struct lu_env *env,
@@ -862,8 +859,8 @@ static int cl_page_own0(const struct lu_env *env, struct cl_io *io,
 					 struct cl_io *, int),
 					io, nonblock);
 		if (result == 0) {
-			PASSERT(env, pg, pg->cp_owner == NULL);
-			PASSERT(env, pg, pg->cp_req == NULL);
+			PASSERT(env, pg, !pg->cp_owner);
+			PASSERT(env, pg, !pg->cp_req);
 			pg->cp_owner = io;
 			pg->cp_task  = current;
 			cl_page_owner_set(pg);
@@ -921,7 +918,7 @@ void cl_page_assume(const struct lu_env *env,
 	io = cl_io_top(io);
 
 	cl_page_invoid(env, io, pg, CL_PAGE_OP(cpo_assume));
-	PASSERT(env, pg, pg->cp_owner == NULL);
+	PASSERT(env, pg, !pg->cp_owner);
 	pg->cp_owner = io;
 	pg->cp_task = current;
 	cl_page_owner_set(pg);
@@ -1037,7 +1034,7 @@ static void cl_page_delete0(const struct lu_env *env, struct cl_page *pg,
 			 * skip removing it.
 			 */
 			tmp = pg->cp_child;
-		for (; tmp != NULL; tmp = tmp->cp_child) {
+		for (; tmp; tmp = tmp->cp_child) {
 			void		    *value;
 			struct cl_object_header *hdr;
 
@@ -1135,7 +1132,7 @@ int cl_page_is_vmlocked(const struct lu_env *env, const struct cl_page *pg)
 	pg = cl_page_top_trusted((struct cl_page *)pg);
 	slice = container_of(pg->cp_layers.next,
 			     const struct cl_page_slice, cpl_linkage);
-	PASSERT(env, pg, slice->cpl_ops->cpo_is_vmlocked != NULL);
+	PASSERT(env, pg, slice->cpl_ops->cpo_is_vmlocked);
 	/*
 	 * Call ->cpo_is_vmlocked() directly instead of going through
 	 * CL_PAGE_INVOKE(), because cl_page_is_vmlocked() is used by
@@ -1216,7 +1213,7 @@ void cl_page_completion(const struct lu_env *env,
 
 	PASSERT(env, pg, crt < CRT_NR);
 	/* cl_page::cp_req already cleared by the caller (osc_completion()) */
-	PASSERT(env, pg, pg->cp_req == NULL);
+	PASSERT(env, pg, !pg->cp_req);
 	PASSERT(env, pg, pg->cp_state == cl_req_type_state(crt));
 
 	CL_PAGE_HEADER(D_TRACE, env, pg, "%d %d\n", crt, ioret);
@@ -1304,7 +1301,7 @@ int cl_page_cache_add(const struct lu_env *env, struct cl_io *io,
 		return -EINVAL;
 
 	list_for_each_entry(scan, &pg->cp_layers, cpl_linkage) {
-		if (scan->cpl_ops->io[crt].cpo_cache_add == NULL)
+		if (!scan->cpl_ops->io[crt].cpo_cache_add)
 			continue;
 
 		result = scan->cpl_ops->io[crt].cpo_cache_add(env, scan, io);
@@ -1450,8 +1447,8 @@ void cl_page_print(const struct lu_env *env, void *cookie,
 {
 	struct cl_page *scan;
 
-	for (scan = cl_page_top((struct cl_page *)pg);
-	     scan != NULL; scan = scan->cp_child)
+	for (scan = cl_page_top((struct cl_page *)pg); scan;
+	     scan = scan->cp_child)
 		cl_page_header_print(env, cookie, printer, scan);
 	CL_PAGE_INVOKE(env, (struct cl_page *)pg, CL_PAGE_OP(cpo_print),
 		       (const struct lu_env *env,
diff --git a/drivers/staging/lustre/lustre/obdclass/class_obd.c b/drivers/staging/lustre/lustre/obdclass/class_obd.c
index 84f6880..4b7e21f 100644
--- a/drivers/staging/lustre/lustre/obdclass/class_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/class_obd.c
@@ -341,7 +341,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 	}
 
 	if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
-		if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL) {
+		if (data->ioc_inllen4 <= 0 || !data->ioc_inlbuf4) {
 			err = -EINVAL;
 			goto out;
 		}
@@ -358,7 +358,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 		goto out;
 	}
 
-	if (obd == NULL) {
+	if (!obd) {
 		CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 		err = -EINVAL;
 		goto out;
diff --git a/drivers/staging/lustre/lustre/obdclass/genops.c b/drivers/staging/lustre/lustre/obdclass/genops.c
index 1cb68df..10b8d33 100644
--- a/drivers/staging/lustre/lustre/obdclass/genops.c
+++ b/drivers/staging/lustre/lustre/obdclass/genops.c
@@ -70,17 +70,16 @@ static struct obd_device *obd_device_alloc(void)
 	struct obd_device *obd;
 
 	obd = kmem_cache_alloc(obd_device_cachep, GFP_NOFS | __GFP_ZERO);
-	if (obd != NULL)
+	if (obd)
 		obd->obd_magic = OBD_DEVICE_MAGIC;
 	return obd;
 }
 
 static void obd_device_free(struct obd_device *obd)
 {
-	LASSERT(obd != NULL);
 	LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n",
 		 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
-	if (obd->obd_namespace != NULL) {
+	if (obd->obd_namespace) {
 		CERROR("obd %p: namespace %p was not properly cleaned up (obd_force=%d)!\n",
 		       obd, obd->obd_namespace, obd->obd_force);
 		LBUG();
@@ -194,7 +193,7 @@ int class_register_type(struct obd_ops *dt_ops, struct md_ops *md_ops,
 		goto failed;
 	}
 
-	if (ldt != NULL) {
+	if (ldt) {
 		type->typ_lu = ldt;
 		rc = lu_device_type_init(ldt);
 		if (rc != 0)
@@ -356,7 +355,7 @@ void class_release_dev(struct obd_device *obd)
 		 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 	LASSERTF(obd == obd_devs[obd->obd_minor], "obd %p != obd_devs[%d] %p\n",
 		 obd, obd->obd_minor, obd_devs[obd->obd_minor]);
-	LASSERT(obd_type != NULL);
+	LASSERT(obd_type);
 
 	CDEBUG(D_INFO, "Release obd device %s at %d obd_type name =%s\n",
 	       obd->obd_name, obd->obd_minor, obd->obd_type->typ_name);
@@ -650,7 +649,7 @@ static void class_export_destroy(struct obd_export *exp)
 	struct obd_device *obd = exp->exp_obd;
 
 	LASSERT_ATOMIC_ZERO(&exp->exp_refcount);
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 
 	CDEBUG(D_IOCTL, "destroying export %p/%s for %s\n", exp,
 	       exp->exp_client_uuid.uuid, obd->obd_name);
@@ -690,7 +689,6 @@ EXPORT_SYMBOL(class_export_get);
 
 void class_export_put(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	LASSERT_ATOMIC_GT_LT(&exp->exp_refcount, 0, LI_POISON);
 	CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", exp,
 	       atomic_read(&exp->exp_refcount) - 1);
@@ -942,7 +940,7 @@ EXPORT_SYMBOL(class_new_import);
 
 void class_destroy_import(struct obd_import *import)
 {
-	LASSERT(import != NULL);
+	LASSERT(import);
 	LASSERT(import != LP_POISON);
 
 	class_handle_unhash(&import->imp_handle);
@@ -962,8 +960,7 @@ void __class_export_add_lock_ref(struct obd_export *exp, struct ldlm_lock *lock)
 
 	LASSERT(lock->l_exp_refs_nr >= 0);
 
-	if (lock->l_exp_refs_target != NULL &&
-	    lock->l_exp_refs_target != exp) {
+	if (lock->l_exp_refs_target && lock->l_exp_refs_target != exp) {
 		LCONSOLE_WARN("setting export %p for lock %p which already has export %p\n",
 			      exp, lock, lock->l_exp_refs_target);
 	}
@@ -1005,9 +1002,9 @@ int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 {
 	struct obd_export *export;
 
-	LASSERT(conn != NULL);
-	LASSERT(obd != NULL);
-	LASSERT(cluuid != NULL);
+	LASSERT(conn);
+	LASSERT(obd);
+	LASSERT(cluuid);
 
 	export = class_new_export(obd, cluuid);
 	if (IS_ERR(export))
@@ -1133,14 +1130,14 @@ static void obd_zombie_impexp_cull(void)
 
 		spin_unlock(&obd_zombie_impexp_lock);
 
-		if (import != NULL) {
+		if (import) {
 			class_import_destroy(import);
 			spin_lock(&obd_zombie_impexp_lock);
 			zombies_count--;
 			spin_unlock(&obd_zombie_impexp_lock);
 		}
 
-		if (export != NULL) {
+		if (export) {
 			class_export_destroy(export);
 			spin_lock(&obd_zombie_impexp_lock);
 			zombies_count--;
@@ -1148,7 +1145,7 @@ static void obd_zombie_impexp_cull(void)
 		}
 
 		cond_resched();
-	} while (import != NULL || export != NULL);
+	} while (import || export);
 }
 
 static struct completion	obd_zombie_start;
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index 1913f3e..1de3b9a 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -106,7 +106,7 @@ int obd_ioctl_getdata(char **buf, int *len, void __user *arg)
 	 * obdfilter-survey is an example, which relies on ioctl. So we'd
 	 * better avoid vmalloc on ioctl path. LU-66 */
 	*buf = libcfs_kvzalloc(hdr.ioc_len, GFP_NOFS);
-	if (*buf == NULL) {
+	if (!*buf) {
 		CERROR("Cannot allocate control buffer of len %d\n",
 		       hdr.ioc_len);
 		return -EINVAL;
@@ -454,8 +454,7 @@ out:
 
 int class_procfs_clean(void)
 {
-	if (debugfs_lustre_root != NULL)
-		debugfs_remove_recursive(debugfs_lustre_root);
+	debugfs_remove_recursive(debugfs_lustre_root);
 
 	debugfs_lustre_root = NULL;
 
diff --git a/drivers/staging/lustre/lustre/obdclass/llog.c b/drivers/staging/lustre/lustre/obdclass/llog.c
index f956d7e..9a647ba 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog.c
@@ -76,8 +76,6 @@ static struct llog_handle *llog_alloc_handle(void)
  */
 static void llog_free_handle(struct llog_handle *loghandle)
 {
-	LASSERT(loghandle != NULL);
-
 	/* failed llog_init_handle */
 	if (!loghandle->lgh_hdr)
 		goto out;
@@ -115,7 +113,7 @@ static int llog_read_header(const struct lu_env *env,
 	if (rc)
 		return rc;
 
-	if (lop->lop_read_header == NULL)
+	if (!lop->lop_read_header)
 		return -EOPNOTSUPP;
 
 	rc = lop->lop_read_header(env, handle);
@@ -144,7 +142,7 @@ int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
 	struct llog_log_hdr	*llh;
 	int			 rc;
 
-	LASSERT(handle->lgh_hdr == NULL);
+	LASSERT(!handle->lgh_hdr);
 
 	llh = kzalloc(sizeof(*llh), GFP_NOFS);
 	if (!llh)
@@ -228,11 +226,11 @@ static int llog_process_thread(void *arg)
 		return 0;
 	}
 
-	if (cd != NULL) {
+	if (cd) {
 		last_called_index = cd->lpcd_first_idx;
 		index = cd->lpcd_first_idx + 1;
 	}
-	if (cd != NULL && cd->lpcd_last_idx)
+	if (cd && cd->lpcd_last_idx)
 		last_index = cd->lpcd_last_idx;
 	else
 		last_index = LLOG_BITMAP_BYTES * 8 - 1;
@@ -328,7 +326,7 @@ repeat:
 	}
 
 out:
-	if (cd != NULL)
+	if (cd)
 		cd->lpcd_last_idx = last_called_index;
 
 	kfree(buf);
@@ -416,13 +414,13 @@ int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt,
 	LASSERT(ctxt);
 	LASSERT(ctxt->loc_logops);
 
-	if (ctxt->loc_logops->lop_open == NULL) {
+	if (!ctxt->loc_logops->lop_open) {
 		*lgh = NULL;
 		return -EOPNOTSUPP;
 	}
 
 	*lgh = llog_alloc_handle();
-	if (*lgh == NULL)
+	if (!*lgh)
 		return -ENOMEM;
 	(*lgh)->lgh_ctxt = ctxt;
 	(*lgh)->lgh_logops = ctxt->loc_logops;
@@ -449,7 +447,7 @@ int llog_close(const struct lu_env *env, struct llog_handle *loghandle)
 	rc = llog_handle2ops(loghandle, &lop);
 	if (rc)
 		goto out;
-	if (lop->lop_close == NULL) {
+	if (!lop->lop_close) {
 		rc = -EOPNOTSUPP;
 		goto out;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_cat.c b/drivers/staging/lustre/lustre/obdclass/llog_cat.c
index 0f05e9c..b88ccba 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog_cat.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog_cat.c
@@ -69,7 +69,7 @@ static int llog_cat_id2handle(const struct lu_env *env,
 	struct llog_handle	*loghandle;
 	int			 rc = 0;
 
-	if (cathandle == NULL)
+	if (!cathandle)
 		return -EBADF;
 
 	down_write(&cathandle->lgh_lock);
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_obd.c b/drivers/staging/lustre/lustre/obdclass/llog_obd.c
index 9bc5199..a06a5ea 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog_obd.c
@@ -110,11 +110,8 @@ int llog_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
 	struct obd_llog_group *olg;
 	int rc, idx;
 
-	LASSERT(ctxt != NULL);
-	LASSERT(ctxt != LP_POISON);
-
 	olg = ctxt->loc_olg;
-	LASSERT(olg != NULL);
+	LASSERT(olg);
 	LASSERT(olg != LP_POISON);
 
 	idx = ctxt->loc_idx;
@@ -151,7 +148,7 @@ int llog_setup(const struct lu_env *env, struct obd_device *obd,
 	if (index < 0 || index >= LLOG_MAX_CTXTS)
 		return -EINVAL;
 
-	LASSERT(olg != NULL);
+	LASSERT(olg);
 
 	ctxt = llog_new_ctxt(obd);
 	if (!ctxt)
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c
index 6acc4a1..4b04124 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c
@@ -48,7 +48,7 @@ void lprocfs_counter_add(struct lprocfs_stats *stats, int idx, long amount)
 	int				smp_id;
 	unsigned long			flags = 0;
 
-	if (stats == NULL)
+	if (!stats)
 		return;
 
 	LASSERTF(0 <= idx && idx < stats->ls_num,
@@ -96,7 +96,7 @@ void lprocfs_counter_sub(struct lprocfs_stats *stats, int idx, long amount)
 	int				smp_id;
 	unsigned long			flags = 0;
 
-	if (stats == NULL)
+	if (!stats)
 		return;
 
 	LASSERTF(0 <= idx && idx < stats->ls_num,
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index a7e22e0..16b1c70 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -109,7 +109,7 @@ int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 	__u64 mask = 1;
 	int i, ret = 0;
 
-	for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
+	for (i = 0; obd_connect_names[i]; i++, mask <<= 1) {
 		if (flags & mask)
 			ret += snprintf(page + ret, count - ret, "%s%s",
 					ret ? sep : "", obd_connect_names[i]);
@@ -199,7 +199,7 @@ int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
 	if (pbuf == end)
 		return -EINVAL;
 
-	if (end != NULL && *end == '.') {
+	if (end && *end == '.') {
 		int temp_val, pow = 1;
 		int i;
 
@@ -247,7 +247,7 @@ struct dentry *ldebugfs_add_simple(struct dentry *root,
 	struct dentry *entry;
 	umode_t mode = 0;
 
-	if (root == NULL || name == NULL || fops == NULL)
+	if (!root || !name || !fops)
 		return ERR_PTR(-EINVAL);
 
 	if (fops->read)
@@ -272,7 +272,7 @@ int ldebugfs_add_vars(struct dentry *parent,
 	if (IS_ERR_OR_NULL(parent) || IS_ERR_OR_NULL(list))
 		return -EINVAL;
 
-	while (list->name != NULL) {
+	while (list->name) {
 		struct dentry *entry;
 		umode_t mode = 0;
 
@@ -491,7 +491,7 @@ int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
 	char *imp_state_name = NULL;
 	int rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -514,7 +514,7 @@ int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
 	struct ptlrpc_connection *conn;
 	int rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 
 	rc = lprocfs_climp_check(obd);
 	if (rc)
@@ -543,7 +543,7 @@ void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 
 	memset(cnt, 0, sizeof(*cnt));
 
-	if (stats == NULL) {
+	if (!stats) {
 		/* set count to 1 to avoid divide-by-zero errs in callers */
 		cnt->lc_count = 1;
 		return;
@@ -554,7 +554,7 @@ void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 	num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 
 	for (i = 0; i < num_entry; i++) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 
@@ -604,7 +604,7 @@ static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep
 	int i;
 	bool first = true;
 
-	for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
+	for (i = 0; obd_connect_names[i]; i++, mask <<= 1) {
 		if (flags & mask) {
 			seq_printf(m, "%s%s",
 					first ? sep : "", obd_connect_names[i]);
@@ -629,7 +629,7 @@ int lprocfs_rd_import(struct seq_file *m, void *data)
 	int				rw	= 0;
 	int				rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -665,7 +665,7 @@ int lprocfs_rd_import(struct seq_file *m, void *data)
 		seq_printf(m, "%s%s", j ? ", " : "", nidstr);
 		j++;
 	}
-	if (imp->imp_connection != NULL)
+	if (imp->imp_connection)
 		libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
 				 nidstr, sizeof(nidstr));
 	else
@@ -682,7 +682,7 @@ int lprocfs_rd_import(struct seq_file *m, void *data)
 		      atomic_read(&imp->imp_inval_count));
 	spin_unlock(&imp->imp_lock);
 
-	if (obd->obd_svc_stats == NULL)
+	if (!obd->obd_svc_stats)
 		goto out_climp;
 
 	header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
@@ -779,7 +779,7 @@ int lprocfs_rd_state(struct seq_file *m, void *data)
 	struct obd_import *imp;
 	int j, k, rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -825,7 +825,7 @@ int lprocfs_rd_timeouts(struct seq_file *m, void *data)
 	struct dhms ts;
 	int i, rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -967,12 +967,12 @@ int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
 	unsigned long           flags = 0;
 	int                     i;
 
-	LASSERT(stats->ls_percpu[cpuid] == NULL);
+	LASSERT(!stats->ls_percpu[cpuid]);
 	LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
 
 	percpusize = lprocfs_stats_counter_size(stats);
 	LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
-	if (stats->ls_percpu[cpuid] != NULL) {
+	if (stats->ls_percpu[cpuid]) {
 		rc = 0;
 		if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
 			if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
@@ -1017,7 +1017,7 @@ struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
 
 	/* alloc percpu pointers for all possible cpu slots */
 	LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
-	if (stats == NULL)
+	if (!stats)
 		return NULL;
 
 	stats->ls_num = num;
@@ -1027,14 +1027,14 @@ struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
 	/* alloc num of counter headers */
 	LIBCFS_ALLOC(stats->ls_cnt_header,
 		     stats->ls_num * sizeof(struct lprocfs_counter_header));
-	if (stats->ls_cnt_header == NULL)
+	if (!stats->ls_cnt_header)
 		goto fail;
 
 	if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
 		/* contains only one set counters */
 		percpusize = lprocfs_stats_counter_size(stats);
 		LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
-		if (stats->ls_percpu[0] == NULL)
+		if (!stats->ls_percpu[0])
 			goto fail;
 		stats->ls_biggest_alloc_num = 1;
 	} else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
@@ -1059,7 +1059,7 @@ void lprocfs_free_stats(struct lprocfs_stats **statsh)
 	unsigned int percpusize;
 	unsigned int i;
 
-	if (stats == NULL || stats->ls_num == 0)
+	if (!stats || stats->ls_num == 0)
 		return;
 	*statsh = NULL;
 
@@ -1070,9 +1070,9 @@ void lprocfs_free_stats(struct lprocfs_stats **statsh)
 
 	percpusize = lprocfs_stats_counter_size(stats);
 	for (i = 0; i < num_entry; i++)
-		if (stats->ls_percpu[i] != NULL)
+		if (stats->ls_percpu[i])
 			LIBCFS_FREE(stats->ls_percpu[i], percpusize);
-	if (stats->ls_cnt_header != NULL)
+	if (stats->ls_cnt_header)
 		LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
 					sizeof(struct lprocfs_counter_header));
 	LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
@@ -1090,7 +1090,7 @@ void lprocfs_clear_stats(struct lprocfs_stats *stats)
 	num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 
 	for (i = 0; i < num_entry; i++) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		for (j = 0; j < stats->ls_num; j++) {
 			percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
@@ -1230,10 +1230,8 @@ void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
 	unsigned int			i;
 	unsigned int			num_cpu;
 
-	LASSERT(stats != NULL);
-
 	header = &stats->ls_cnt_header[index];
-	LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
+	LASSERTF(header, "Failed to allocate stats header:[%d]%s/%s\n",
 		 index, name, units);
 
 	header->lc_config = conf;
@@ -1242,7 +1240,7 @@ void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
 
 	num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 	for (i = 0; i < num_cpu; ++i) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
 		percpu_cntr->lc_count		= 0;
@@ -1270,7 +1268,7 @@ __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
 {
 	__s64 ret = 0;
 
-	if (lc == NULL || header == NULL)
+	if (!lc || !header)
 		return 0;
 
 	switch (field) {
@@ -1412,7 +1410,7 @@ char *lprocfs_find_named_value(const char *buffer, const char *name,
 
 	/* there is no strnstr() in rhel5 and ubuntu kernels */
 	val = lprocfs_strnstr(buffer, name, buflen);
-	if (val == NULL)
+	if (!val)
 		return (char *)buffer;
 
 	val += strlen(name);			     /* skip prefix */
diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c b/drivers/staging/lustre/lustre/obdclass/lu_object.c
index ce248f4..15ffbbf 100644
--- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
@@ -86,13 +86,12 @@ void lu_object_put(const struct lu_env *env, struct lu_object *o)
 	 */
 	fid = lu_object_fid(o);
 	if (fid_is_zero(fid)) {
-		LASSERT(top->loh_hash.next == NULL
-			&& top->loh_hash.pprev == NULL);
+		LASSERT(!top->loh_hash.next && !top->loh_hash.pprev);
 		LASSERT(list_empty(&top->loh_lru));
 		if (!atomic_dec_and_test(&top->loh_ref))
 			return;
 		list_for_each_entry_reverse(o, &top->loh_layers, lo_linkage) {
-			if (o->lo_ops->loo_object_release != NULL)
+			if (o->lo_ops->loo_object_release)
 				o->lo_ops->loo_object_release(env, o);
 		}
 		lu_object_free(env, orig);
@@ -119,7 +118,7 @@ void lu_object_put(const struct lu_env *env, struct lu_object *o)
 	 * layers, and notify them that object is no longer busy.
 	 */
 	list_for_each_entry_reverse(o, &top->loh_layers, lo_linkage) {
-		if (o->lo_ops->loo_object_release != NULL)
+		if (o->lo_ops->loo_object_release)
 			o->lo_ops->loo_object_release(env, o);
 	}
 
@@ -210,7 +209,7 @@ static struct lu_object *lu_object_alloc(const struct lu_env *env,
 	 * lu_object_header.
 	 */
 	top = dev->ld_ops->ldo_object_alloc(env, NULL, dev);
-	if (top == NULL)
+	if (!top)
 		return ERR_PTR(-ENOMEM);
 	if (IS_ERR(top))
 		return top;
@@ -245,7 +244,7 @@ next:
 	} while (!clean);
 
 	list_for_each_entry_reverse(scan, layers, lo_linkage) {
-		if (scan->lo_ops->loo_object_start != NULL) {
+		if (scan->lo_ops->loo_object_start) {
 			result = scan->lo_ops->loo_object_start(env, scan);
 			if (result != 0) {
 				lu_object_free(env, top);
@@ -276,7 +275,7 @@ static void lu_object_free(const struct lu_env *env, struct lu_object *o)
 	 * First call ->loo_object_delete() method to release all resources.
 	 */
 	list_for_each_entry_reverse(scan, layers, lo_linkage) {
-		if (scan->lo_ops->loo_object_delete != NULL)
+		if (scan->lo_ops->loo_object_delete)
 			scan->lo_ops->loo_object_delete(env, scan);
 	}
 
@@ -296,7 +295,6 @@ static void lu_object_free(const struct lu_env *env, struct lu_object *o)
 		 */
 		o = container_of0(splice.prev, struct lu_object, lo_linkage);
 		list_del_init(&o->lo_linkage);
-		LASSERT(o->lo_ops->loo_object_free != NULL);
 		o->lo_ops->loo_object_free(env, o);
 	}
 
@@ -451,7 +449,6 @@ int lu_cdebug_printer(const struct lu_env *env,
 	va_start(args, format);
 
 	key = lu_context_key_get(&env->le_ctx, &lu_global_key);
-	LASSERT(key != NULL);
 
 	used = strlen(key->lck_area);
 	complete = format[strlen(format) - 1] == '\n';
@@ -508,7 +505,7 @@ void lu_object_print(const struct lu_env *env, void *cookie,
 		(*printer)(env, cookie, "%*.*s%s@%p", depth, depth, ruler,
 			   o->lo_dev->ld_type->ldt_name, o);
 
-		if (o->lo_ops->loo_object_print != NULL)
+		if (o->lo_ops->loo_object_print)
 			(*o->lo_ops->loo_object_print)(env, cookie, printer, o);
 
 		(*printer)(env, cookie, "\n");
@@ -537,7 +534,7 @@ static struct lu_object *htable_lookup(struct lu_site *s,
 	/* cfs_hash_bd_peek_locked is a somehow "internal" function
 	 * of cfs_hash, it doesn't add refcount on object. */
 	hnode = cfs_hash_bd_peek_locked(s->ls_obj_hash, bd, (void *)f);
-	if (hnode == NULL) {
+	if (!hnode) {
 		lprocfs_counter_incr(s->ls_stats, LU_SS_CACHE_MISS);
 		return ERR_PTR(-ENOENT);
 	}
@@ -636,7 +633,7 @@ static struct lu_object *lu_object_find_try(const struct lu_env *env,
 	 * If dying object is found during index search, add @waiter to the
 	 * site wait-queue and return ERR_PTR(-EAGAIN).
 	 */
-	if (conf != NULL && conf->loc_flags & LOC_F_NEW)
+	if (conf && conf->loc_flags & LOC_F_NEW)
 		return lu_object_new(env, dev, f, conf);
 
 	s  = dev->ld_site;
@@ -715,7 +712,7 @@ struct lu_object *lu_object_find_slice(const struct lu_env *env,
 	top = lu_object_find(env, dev, f, conf);
 	if (!IS_ERR(top)) {
 		obj = lu_object_locate(top->lo_header, dev->ld_type);
-		if (obj == NULL)
+		if (!obj)
 			lu_object_put(env, top);
 	} else
 		obj = top;
@@ -966,11 +963,11 @@ int lu_site_init(struct lu_site *s, struct lu_device *top)
 						 CFS_HASH_NO_ITEMREF |
 						 CFS_HASH_DEPTH |
 						 CFS_HASH_ASSERT_EMPTY);
-		if (s->ls_obj_hash != NULL)
+		if (s->ls_obj_hash)
 			break;
 	}
 
-	if (s->ls_obj_hash == NULL) {
+	if (!s->ls_obj_hash) {
 		CERROR("failed to create lu_site hash with bits: %d\n", bits);
 		return -ENOMEM;
 	}
@@ -982,7 +979,7 @@ int lu_site_init(struct lu_site *s, struct lu_device *top)
 	}
 
 	s->ls_stats = lprocfs_alloc_stats(LU_SS_LAST_STAT, 0);
-	if (s->ls_stats == NULL) {
+	if (!s->ls_stats) {
 		cfs_hash_putref(s->ls_obj_hash);
 		s->ls_obj_hash = NULL;
 		return -ENOMEM;
@@ -1031,19 +1028,19 @@ void lu_site_fini(struct lu_site *s)
 	list_del_init(&s->ls_linkage);
 	mutex_unlock(&lu_sites_guard);
 
-	if (s->ls_obj_hash != NULL) {
+	if (s->ls_obj_hash) {
 		cfs_hash_putref(s->ls_obj_hash);
 		s->ls_obj_hash = NULL;
 	}
 
-	if (s->ls_top_dev != NULL) {
+	if (s->ls_top_dev) {
 		s->ls_top_dev->ld_site = NULL;
 		lu_ref_del(&s->ls_top_dev->ld_reference, "site-top", s);
 		lu_device_put(s->ls_top_dev);
 		s->ls_top_dev = NULL;
 	}
 
-	if (s->ls_stats != NULL)
+	if (s->ls_stats)
 		lprocfs_free_stats(&s->ls_stats);
 }
 EXPORT_SYMBOL(lu_site_fini);
@@ -1088,7 +1085,7 @@ EXPORT_SYMBOL(lu_device_put);
  */
 int lu_device_init(struct lu_device *d, struct lu_device_type *t)
 {
-	if (t->ldt_device_nr++ == 0 && t->ldt_ops->ldto_start != NULL)
+	if (t->ldt_device_nr++ == 0 && t->ldt_ops->ldto_start)
 		t->ldt_ops->ldto_start(t);
 	memset(d, 0, sizeof(*d));
 	atomic_set(&d->ld_ref, 0);
@@ -1107,7 +1104,7 @@ void lu_device_fini(struct lu_device *d)
 	struct lu_device_type *t;
 
 	t = d->ld_type;
-	if (d->ld_obd != NULL) {
+	if (d->ld_obd) {
 		d->ld_obd->obd_lu_dev = NULL;
 		d->ld_obd = NULL;
 	}
@@ -1116,7 +1113,7 @@ void lu_device_fini(struct lu_device *d)
 	LASSERTF(atomic_read(&d->ld_ref) == 0,
 		 "Refcount is %u\n", atomic_read(&d->ld_ref));
 	LASSERT(t->ldt_device_nr > 0);
-	if (--t->ldt_device_nr == 0 && t->ldt_ops->ldto_stop != NULL)
+	if (--t->ldt_device_nr == 0 && t->ldt_ops->ldto_stop)
 		t->ldt_ops->ldto_stop(t);
 }
 EXPORT_SYMBOL(lu_device_fini);
@@ -1148,7 +1145,7 @@ void lu_object_fini(struct lu_object *o)
 
 	LASSERT(list_empty(&o->lo_linkage));
 
-	if (dev != NULL) {
+	if (dev) {
 		lu_ref_del_at(&dev->ld_reference, &o->lo_dev_ref,
 			      "lu_object", o);
 		lu_device_put(dev);
@@ -1239,7 +1236,7 @@ void lu_stack_fini(const struct lu_env *env, struct lu_device *top)
 	struct lu_device *next;
 
 	lu_site_purge(env, site, ~0);
-	for (scan = top; scan != NULL; scan = next) {
+	for (scan = top; scan; scan = next) {
 		next = scan->ld_type->ldt_ops->ldto_device_fini(env, scan);
 		lu_ref_del(&scan->ld_reference, "lu-stack", &lu_site_init);
 		lu_device_put(scan);
@@ -1248,13 +1245,13 @@ void lu_stack_fini(const struct lu_env *env, struct lu_device *top)
 	/* purge again. */
 	lu_site_purge(env, site, ~0);
 
-	for (scan = top; scan != NULL; scan = next) {
+	for (scan = top; scan; scan = next) {
 		const struct lu_device_type *ldt = scan->ld_type;
 		struct obd_type	     *type;
 
 		next = ldt->ldt_ops->ldto_device_free(env, scan);
 		type = ldt->ldt_obd_type;
-		if (type != NULL) {
+		if (type) {
 			type->typ_refcnt--;
 			class_put_type(type);
 		}
@@ -1289,14 +1286,14 @@ int lu_context_key_register(struct lu_context_key *key)
 	int result;
 	int i;
 
-	LASSERT(key->lct_init != NULL);
-	LASSERT(key->lct_fini != NULL);
+	LASSERT(key->lct_init);
+	LASSERT(key->lct_fini);
 	LASSERT(key->lct_tags != 0);
 
 	result = -ENFILE;
 	spin_lock(&lu_keys_guard);
 	for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
-		if (lu_keys[i] == NULL) {
+		if (!lu_keys[i]) {
 			key->lct_index = i;
 			atomic_set(&key->lct_used, 1);
 			lu_keys[i] = key;
@@ -1313,12 +1310,10 @@ EXPORT_SYMBOL(lu_context_key_register);
 
 static void key_fini(struct lu_context *ctx, int index)
 {
-	if (ctx->lc_value != NULL && ctx->lc_value[index] != NULL) {
+	if (ctx->lc_value && ctx->lc_value[index]) {
 		struct lu_context_key *key;
 
 		key = lu_keys[index];
-		LASSERT(key != NULL);
-		LASSERT(key->lct_fini != NULL);
 		LASSERT(atomic_read(&key->lct_used) > 1);
 
 		key->lct_fini(ctx, key, ctx->lc_value[index]);
@@ -1376,7 +1371,7 @@ int lu_context_key_register_many(struct lu_context_key *k, ...)
 		if (result)
 			break;
 		key = va_arg(args, struct lu_context_key *);
-	} while (key != NULL);
+	} while (key);
 	va_end(args);
 
 	if (result != 0) {
@@ -1404,7 +1399,7 @@ void lu_context_key_degister_many(struct lu_context_key *k, ...)
 	do {
 		lu_context_key_degister(k);
 		k = va_arg(args, struct lu_context_key*);
-	} while (k != NULL);
+	} while (k);
 	va_end(args);
 }
 EXPORT_SYMBOL(lu_context_key_degister_many);
@@ -1420,7 +1415,7 @@ void lu_context_key_revive_many(struct lu_context_key *k, ...)
 	do {
 		lu_context_key_revive(k);
 		k = va_arg(args, struct lu_context_key*);
-	} while (k != NULL);
+	} while (k);
 	va_end(args);
 }
 EXPORT_SYMBOL(lu_context_key_revive_many);
@@ -1436,7 +1431,7 @@ void lu_context_key_quiesce_many(struct lu_context_key *k, ...)
 	do {
 		lu_context_key_quiesce(k);
 		k = va_arg(args, struct lu_context_key*);
-	} while (k != NULL);
+	} while (k);
 	va_end(args);
 }
 EXPORT_SYMBOL(lu_context_key_quiesce_many);
@@ -1497,7 +1492,7 @@ static void keys_fini(struct lu_context *ctx)
 {
 	int	i;
 
-	if (ctx->lc_value == NULL)
+	if (!ctx->lc_value)
 		return;
 
 	for (i = 0; i < ARRAY_SIZE(lu_keys); ++i)
@@ -1511,12 +1506,12 @@ static int keys_fill(struct lu_context *ctx)
 {
 	int i;
 
-	LINVRNT(ctx->lc_value != NULL);
+	LINVRNT(ctx->lc_value);
 	for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
 		struct lu_context_key *key;
 
 		key = lu_keys[i];
-		if (ctx->lc_value[i] == NULL && key != NULL &&
+		if (!ctx->lc_value[i] && key &&
 		    (key->lct_tags & ctx->lc_tags) &&
 		    /*
 		     * Don't create values for a LCT_QUIESCENT key, as this
@@ -1525,7 +1520,7 @@ static int keys_fill(struct lu_context *ctx)
 		    !(key->lct_tags & LCT_QUIESCENT)) {
 			void *value;
 
-			LINVRNT(key->lct_init != NULL);
+			LINVRNT(key->lct_init);
 			LINVRNT(key->lct_index == i);
 
 			value = key->lct_init(ctx, key);
@@ -1542,7 +1537,7 @@ static int keys_fill(struct lu_context *ctx)
 			 * value.
 			 */
 			ctx->lc_value[i] = value;
-			if (key->lct_exit != NULL)
+			if (key->lct_exit)
 				ctx->lc_tags |= LCT_HAS_EXIT;
 		}
 		ctx->lc_version = key_set_version;
@@ -1554,7 +1549,7 @@ static int keys_init(struct lu_context *ctx)
 {
 	ctx->lc_value = kcalloc(ARRAY_SIZE(lu_keys), sizeof(ctx->lc_value[0]),
 				GFP_NOFS);
-	if (likely(ctx->lc_value != NULL))
+	if (likely(ctx->lc_value))
 		return keys_fill(ctx);
 
 	return -ENOMEM;
@@ -1626,14 +1621,13 @@ void lu_context_exit(struct lu_context *ctx)
 
 	LINVRNT(ctx->lc_state == LCS_ENTERED);
 	ctx->lc_state = LCS_LEFT;
-	if (ctx->lc_tags & LCT_HAS_EXIT && ctx->lc_value != NULL) {
+	if (ctx->lc_tags & LCT_HAS_EXIT && ctx->lc_value) {
 		for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
-			if (ctx->lc_value[i] != NULL) {
+			if (ctx->lc_value[i]) {
 				struct lu_context_key *key;
 
 				key = lu_keys[i];
-				LASSERT(key != NULL);
-				if (key->lct_exit != NULL)
+				if (key->lct_exit)
 					key->lct_exit(ctx,
 						      key, ctx->lc_value[i]);
 			}
@@ -1688,7 +1682,7 @@ int lu_env_refill(struct lu_env *env)
 	int result;
 
 	result = lu_context_refill(&env->le_ctx);
-	if (result == 0 && env->le_ses != NULL)
+	if (result == 0 && env->le_ses)
 		result = lu_context_refill(env->le_ses);
 	return result;
 }
@@ -1922,11 +1916,11 @@ int lu_kmem_init(struct lu_kmem_descr *caches)
 	int result;
 	struct lu_kmem_descr *iter = caches;
 
-	for (result = 0; iter->ckd_cache != NULL; ++iter) {
+	for (result = 0; iter->ckd_cache; ++iter) {
 		*iter->ckd_cache = kmem_cache_create(iter->ckd_name,
 							iter->ckd_size,
 							0, 0, NULL);
-		if (*iter->ckd_cache == NULL) {
+		if (!*iter->ckd_cache) {
 			result = -ENOMEM;
 			/* free all previously allocated caches */
 			lu_kmem_fini(caches);
@@ -1943,7 +1937,7 @@ EXPORT_SYMBOL(lu_kmem_init);
  */
 void lu_kmem_fini(struct lu_kmem_descr *caches)
 {
-	for (; caches->ckd_cache != NULL; ++caches) {
+	for (; caches->ckd_cache; ++caches) {
 		kmem_cache_destroy(*caches->ckd_cache);
 		*caches->ckd_cache = NULL;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/lustre_handles.c b/drivers/staging/lustre/lustre/obdclass/lustre_handles.c
index fb9147c..2bbbc9f 100644
--- a/drivers/staging/lustre/lustre/obdclass/lustre_handles.c
+++ b/drivers/staging/lustre/lustre/obdclass/lustre_handles.c
@@ -65,7 +65,7 @@ void class_handle_hash(struct portals_handle *h,
 {
 	struct handle_bucket *bucket;
 
-	LASSERT(h != NULL);
+	LASSERT(h);
 	LASSERT(list_empty(&h->h_link));
 
 	/*
@@ -140,7 +140,7 @@ void *class_handle2object(__u64 cookie)
 	struct portals_handle *h;
 	void *retval = NULL;
 
-	LASSERT(handle_hash != NULL);
+	LASSERT(handle_hash);
 
 	/* Be careful when you want to change this code. See the
 	 * rcu_read_lock() definition on top this file. - jxiong */
@@ -170,7 +170,7 @@ void class_handle_free_cb(struct rcu_head *rcu)
 	struct portals_handle *h = RCU2HANDLE(rcu);
 	void *ptr = (void *)(unsigned long)h->h_cookie;
 
-	if (h->h_ops->hop_free != NULL)
+	if (h->h_ops->hop_free)
 		h->h_ops->hop_free(ptr, h->h_size);
 	else
 		kfree(ptr);
@@ -183,11 +183,11 @@ int class_handle_init(void)
 	struct timespec64 ts;
 	int seed[2];
 
-	LASSERT(handle_hash == NULL);
+	LASSERT(!handle_hash);
 
 	handle_hash = libcfs_kvzalloc(sizeof(*bucket) * HANDLE_HASH_SIZE,
 				      GFP_NOFS);
-	if (handle_hash == NULL)
+	if (!handle_hash)
 		return -ENOMEM;
 
 	spin_lock_init(&handle_base_lock);
@@ -234,7 +234,7 @@ void class_handle_cleanup(void)
 {
 	int count;
 
-	LASSERT(handle_hash != NULL);
+	LASSERT(handle_hash);
 
 	count = cleanup_all_handles();
 
diff --git a/drivers/staging/lustre/lustre/obdclass/lustre_peer.c b/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
index d6184f8..e90041b 100644
--- a/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
+++ b/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
@@ -151,7 +151,7 @@ int class_del_uuid(const char *uuid)
 	struct uuid_nid_data *data;
 
 	spin_lock(&g_uuid_lock);
-	if (uuid != NULL) {
+	if (uuid) {
 		struct obd_uuid tmp;
 
 		obd_str2uuid(&tmp, uuid);
@@ -165,7 +165,7 @@ int class_del_uuid(const char *uuid)
 		list_splice_init(&g_uuid_list, &deathrow);
 	spin_unlock(&g_uuid_lock);
 
-	if (uuid != NULL && list_empty(&deathrow)) {
+	if (uuid && list_empty(&deathrow)) {
 		CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
 		return -EINVAL;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_config.c b/drivers/staging/lustre/lustre/obdclass/obd_config.c
index 49cdc64..c4128ac 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_config.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_config.c
@@ -210,7 +210,7 @@ static int class_attach(struct lustre_cfg *lcfg)
 		       name, typename, rc);
 		goto out;
 	}
-	LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
+	LASSERTF(obd, "Cannot get obd device %s of type %s\n",
 		 name, typename);
 	LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 		 "obd %p obd_magic %08X != %08X\n",
@@ -272,9 +272,9 @@ static int class_attach(struct lustre_cfg *lcfg)
 	       obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 	return 0;
  out:
-	if (obd != NULL) {
+	if (obd)
 		class_release_dev(obd);
-	}
+
 	return rc;
 }
 
@@ -286,7 +286,7 @@ static int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 	int err = 0;
 	struct obd_export *exp;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	LASSERTF(obd == class_num2obd(obd->obd_minor),
 		 "obd %p != obd_devs[%d] %p\n",
 		 obd, obd->obd_minor, class_num2obd(obd->obd_minor));
@@ -1183,7 +1183,7 @@ int class_config_llog_handler(const struct lu_env *env,
 
 		/* we override the llog's uuid for clients, to insure they
 		are unique */
-		if (clli && clli->cfg_instance != NULL &&
+		if (clli && clli->cfg_instance &&
 		    lcfg->lcfg_command == LCFG_ATTACH) {
 			lustre_cfg_bufs_set_string(&bufs, 2,
 						   clli->cfg_uuid.uuid);
@@ -1270,7 +1270,7 @@ int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 	if (cfg) {
 		cd.lpcd_first_idx = cfg->cfg_last_idx;
 		callback = cfg->cfg_callback;
-		LASSERT(callback != NULL);
+		LASSERT(callback);
 	} else {
 		callback = class_config_llog_handler;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
index b5aa816..9618cc2 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
@@ -518,13 +518,12 @@ static int lustre_free_lsi(struct super_block *sb)
 {
 	struct lustre_sb_info *lsi = s2lsi(sb);
 
-	LASSERT(lsi != NULL);
 	CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
 
 	/* someone didn't call server_put_mount. */
 	LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
 
-	if (lsi->lsi_lmd != NULL) {
+	if (lsi->lsi_lmd) {
 		kfree(lsi->lsi_lmd->lmd_dev);
 		kfree(lsi->lsi_lmd->lmd_profile);
 		kfree(lsi->lsi_lmd->lmd_mgssec);
@@ -538,7 +537,7 @@ static int lustre_free_lsi(struct super_block *sb)
 		kfree(lsi->lsi_lmd);
 	}
 
-	LASSERT(lsi->lsi_llsbi == NULL);
+	LASSERT(!lsi->lsi_llsbi);
 	kfree(lsi);
 	s2lsi_nocast(sb) = NULL;
 
@@ -551,8 +550,6 @@ static int lustre_put_lsi(struct super_block *sb)
 {
 	struct lustre_sb_info *lsi = s2lsi(sb);
 
-	LASSERT(lsi != NULL);
-
 	CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
 	if (atomic_dec_and_test(&lsi->lsi_mounts)) {
 		lustre_free_lsi(sb);
@@ -588,12 +585,12 @@ static int server_name2fsname(const char *svname, char *fsname,
 	if (dash == svname)
 		return -EINVAL;
 
-	if (fsname != NULL) {
+	if (fsname) {
 		strncpy(fsname, svname, dash - svname);
 		fsname[dash - svname] = '\0';
 	}
 
-	if (endptr != NULL)
+	if (endptr)
 		*endptr = dash;
 
 	return 0;
@@ -627,18 +624,18 @@ static int server_name2index(const char *svname, __u32 *idx,
 	dash += 3;
 
 	if (strncmp(dash, "all", 3) == 0) {
-		if (endptr != NULL)
+		if (endptr)
 			*endptr = dash + 3;
 		return rc | LDD_F_SV_ALL;
 	}
 
 	index = simple_strtoul(dash, (char **)endptr, 16);
-	if (idx != NULL)
+	if (idx)
 		*idx = index;
 
 	/* Account for -mdc after index that is possible when specifying mdt */
-	if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
-				      sizeof(LUSTRE_MDC_NAME)-1) == 0)
+	if (endptr && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
+			      sizeof(LUSTRE_MDC_NAME) - 1) == 0)
 		*endptr += sizeof(LUSTRE_MDC_NAME);
 
 	return rc;
@@ -788,7 +785,7 @@ static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
 	lmd->lmd_mgssec = NULL;
 
 	tail = strchr(ptr, ',');
-	if (tail == NULL)
+	if (!tail)
 		length = strlen(ptr);
 	else
 		length = tail - ptr;
@@ -807,14 +804,14 @@ static int lmd_parse_string(char **handle, char *ptr)
 	char   *tail;
 	int     length;
 
-	if ((handle == NULL) || (ptr == NULL))
+	if (!handle || !ptr)
 		return -EINVAL;
 
 	kfree(*handle);
 	*handle = NULL;
 
 	tail = strchr(ptr, ',');
-	if (tail == NULL)
+	if (!tail)
 		length = strlen(ptr);
 	else
 		length = tail - ptr;
@@ -847,14 +844,14 @@ static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
 		return -EINVAL;
 	}
 
-	if (lmd->lmd_mgs != NULL)
+	if (lmd->lmd_mgs)
 		oldlen = strlen(lmd->lmd_mgs) + 1;
 
 	mgsnid = kzalloc(oldlen + length + 1, GFP_NOFS);
 	if (!mgsnid)
 		return -ENOMEM;
 
-	if (lmd->lmd_mgs != NULL) {
+	if (lmd->lmd_mgs) {
 		/* Multiple mgsnid= are taken to mean failover locations */
 		memcpy(mgsnid, lmd->lmd_mgs, oldlen);
 		mgsnid[oldlen - 1] = ':';
@@ -981,7 +978,7 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
 			size_t length, params_length;
 			char *tail = strchr(s1 + 6, ',');
 
-			if (tail == NULL)
+			if (!tail)
 				length = strlen(s1);
 			else
 				length = tail - s1;
@@ -1011,7 +1008,7 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
 
 		/* Find next opt */
 		s2 = strchr(s1, ',');
-		if (s2 == NULL) {
+		if (!s2) {
 			if (clear)
 				*s1 = '\0';
 			break;
@@ -1113,9 +1110,9 @@ static int lustre_fill_super(struct super_block *sb, void *data, int silent)
 
 	if (lmd_is_client(lmd)) {
 		CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
-		if (client_fill_super == NULL)
+		if (!client_fill_super)
 			request_module("lustre");
-		if (client_fill_super == NULL) {
+		if (!client_fill_super) {
 			LCONSOLE_ERROR_MSG(0x165, "Nothing registered for client mount! Is the 'lustre' module loaded?\n");
 			lustre_put_lsi(sb);
 			rc = -ENODEV;
-- 
2.1.0

[lustre-devel] [PATCH 23/45] staging/lustre/obdclass: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/obdclass/acl.c       | 10 +--
 drivers/staging/lustre/lustre/obdclass/cl_io.c     | 83 +++++++++---------
 drivers/staging/lustre/lustre/obdclass/cl_lock.c   | 47 +++++------
 drivers/staging/lustre/lustre/obdclass/cl_object.c | 40 +++++----
 drivers/staging/lustre/lustre/obdclass/cl_page.c   | 97 +++++++++++-----------
 drivers/staging/lustre/lustre/obdclass/class_obd.c |  4 +-
 drivers/staging/lustre/lustre/obdclass/genops.c    | 29 +++----
 .../lustre/lustre/obdclass/linux/linux-module.c    |  5 +-
 drivers/staging/lustre/lustre/obdclass/llog.c      | 18 ++--
 drivers/staging/lustre/lustre/obdclass/llog_cat.c  |  2 +-
 drivers/staging/lustre/lustre/obdclass/llog_obd.c  |  7 +-
 .../lustre/lustre/obdclass/lprocfs_counters.c      |  4 +-
 .../lustre/lustre/obdclass/lprocfs_status.c        | 56 ++++++-------
 drivers/staging/lustre/lustre/obdclass/lu_object.c | 94 ++++++++++-----------
 .../lustre/lustre/obdclass/lustre_handles.c        | 12 +--
 .../staging/lustre/lustre/obdclass/lustre_peer.c   |  4 +-
 .../staging/lustre/lustre/obdclass/obd_config.c    | 12 +--
 drivers/staging/lustre/lustre/obdclass/obd_mount.c | 37 ++++-----
 18 files changed, 267 insertions(+), 294 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/acl.c b/drivers/staging/lustre/lustre/obdclass/acl.c
index 49ba885..0e02ae9 100644
--- a/drivers/staging/lustre/lustre/obdclass/acl.c
+++ b/drivers/staging/lustre/lustre/obdclass/acl.c
@@ -104,7 +104,7 @@ static int lustre_posix_acl_xattr_reduce_space(posix_acl_xattr_header **header,
 		return old_size;
 
 	new = kmemdup(*header, new_size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return -ENOMEM;
 
 	kfree(*header);
@@ -124,7 +124,7 @@ static int lustre_ext_acl_xattr_reduce_space(ext_acl_xattr_header **header,
 		return 0;
 
 	new = kmemdup(*header, ext_size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return -ENOMEM;
 
 	kfree(*header);
@@ -149,7 +149,7 @@ lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size)
 		count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr);
 	esize = CFS_ACL_XATTR_SIZE(count, ext_acl_xattr);
 	new = kzalloc(esize, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return ERR_PTR(-ENOMEM);
 
 	new->a_count = cpu_to_le32(count);
@@ -180,7 +180,7 @@ int lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, size_t size,
 		return -EINVAL;
 
 	new = kzalloc(size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return -ENOMEM;
 
 	new->a_version = cpu_to_le32(CFS_ACL_XATTR_VERSION);
@@ -300,7 +300,7 @@ lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size,
 	ext_size = CFS_ACL_XATTR_SIZE(ext_count, ext_acl_xattr);
 
 	new = kzalloc(ext_size, GFP_NOFS);
-	if (unlikely(new == NULL))
+	if (unlikely(!new))
 		return ERR_PTR(-ENOMEM);
 
 	for (i = 0, j = 0; i < posix_count; i++) {
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_io.c b/drivers/staging/lustre/lustre/obdclass/cl_io.c
index 63246ba..58b46a7 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_io.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_io.c
@@ -93,7 +93,7 @@ static int cl_io_invariant(const struct cl_io *io)
 		 * CIS_IO_GOING.
 		 */
 		ergo(io->ci_owned_nr > 0, io->ci_state == CIS_IO_GOING ||
-		     (io->ci_state == CIS_LOCKED && up != NULL));
+		     (io->ci_state == CIS_LOCKED && up));
 }
 
 /**
@@ -111,7 +111,7 @@ void cl_io_fini(const struct lu_env *env, struct cl_io *io)
 		slice = container_of(io->ci_layers.prev, struct cl_io_slice,
 				     cis_linkage);
 		list_del_init(&slice->cis_linkage);
-		if (slice->cis_iop->op[io->ci_type].cio_fini != NULL)
+		if (slice->cis_iop->op[io->ci_type].cio_fini)
 			slice->cis_iop->op[io->ci_type].cio_fini(env, slice);
 		/*
 		 * Invalidate slice to catch use after free. This assumes that
@@ -164,7 +164,7 @@ static int cl_io_init0(const struct lu_env *env, struct cl_io *io,
 
 	result = 0;
 	cl_object_for_each(scan, obj) {
-		if (scan->co_ops->coo_io_init != NULL) {
+		if (scan->co_ops->coo_io_init) {
 			result = scan->co_ops->coo_io_init(env, scan, io);
 			if (result != 0)
 				break;
@@ -186,7 +186,7 @@ int cl_io_sub_init(const struct lu_env *env, struct cl_io *io,
 	struct cl_thread_info *info = cl_env_info(env);
 
 	LASSERT(obj != cl_object_top(obj));
-	if (info->clt_current_io == NULL)
+	if (!info->clt_current_io)
 		info->clt_current_io = io;
 	return cl_io_init0(env, io, iot, obj);
 }
@@ -208,7 +208,7 @@ int cl_io_init(const struct lu_env *env, struct cl_io *io,
 	struct cl_thread_info *info = cl_env_info(env);
 
 	LASSERT(obj == cl_object_top(obj));
-	LASSERT(info->clt_current_io == NULL);
+	LASSERT(!info->clt_current_io);
 
 	info->clt_current_io = io;
 	return cl_io_init0(env, io, iot, obj);
@@ -224,7 +224,7 @@ int cl_io_rw_init(const struct lu_env *env, struct cl_io *io,
 		  enum cl_io_type iot, loff_t pos, size_t count)
 {
 	LINVRNT(iot == CIT_READ || iot == CIT_WRITE);
-	LINVRNT(io->ci_obj != NULL);
+	LINVRNT(io->ci_obj);
 
 	LU_OBJECT_HEADER(D_VFSTRACE, env, &io->ci_obj->co_lu,
 			 "io range: %u [%llu, %llu) %u %u\n",
@@ -292,7 +292,7 @@ static void cl_io_locks_sort(struct cl_io *io)
 		list_for_each_entry_safe(curr, temp,
 					     &io->ci_lockset.cls_todo,
 					     cill_linkage) {
-			if (prev != NULL) {
+			if (prev) {
 				switch (cl_lock_descr_sort(&prev->cill_descr,
 							  &curr->cill_descr)) {
 				case 0:
@@ -399,11 +399,11 @@ static void cl_lock_link_fini(const struct lu_env *env, struct cl_io *io,
 	struct cl_lock *lock = link->cill_lock;
 
 	list_del_init(&link->cill_linkage);
-	if (lock != NULL) {
+	if (lock) {
 		cl_lock_release(env, lock, "io", io);
 		link->cill_lock = NULL;
 	}
-	if (link->cill_fini != NULL)
+	if (link->cill_fini)
 		link->cill_fini(env, link);
 }
 
@@ -458,7 +458,7 @@ int cl_io_lock(const struct lu_env *env, struct cl_io *io)
 	LINVRNT(cl_io_invariant(io));
 
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_lock == NULL)
+		if (!scan->cis_iop->op[io->ci_type].cio_lock)
 			continue;
 		result = scan->cis_iop->op[io->ci_type].cio_lock(env, scan);
 		if (result != 0)
@@ -503,7 +503,7 @@ void cl_io_unlock(const struct lu_env *env, struct cl_io *io)
 		cl_lock_link_fini(env, io, link);
 	}
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_unlock != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_unlock)
 			scan->cis_iop->op[io->ci_type].cio_unlock(env, scan);
 	}
 	io->ci_state = CIS_UNLOCKED;
@@ -529,7 +529,7 @@ int cl_io_iter_init(const struct lu_env *env, struct cl_io *io)
 
 	result = 0;
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_iter_init == NULL)
+		if (!scan->cis_iop->op[io->ci_type].cio_iter_init)
 			continue;
 		result = scan->cis_iop->op[io->ci_type].cio_iter_init(env,
 								      scan);
@@ -556,7 +556,7 @@ void cl_io_iter_fini(const struct lu_env *env, struct cl_io *io)
 	LINVRNT(cl_io_invariant(io));
 
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_iter_fini != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_iter_fini)
 			scan->cis_iop->op[io->ci_type].cio_iter_fini(env, scan);
 	}
 	io->ci_state = CIS_IT_ENDED;
@@ -581,7 +581,7 @@ static void cl_io_rw_advance(const struct lu_env *env, struct cl_io *io,
 
 	/* layers have to be notified. */
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_advance != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_advance)
 			scan->cis_iop->op[io->ci_type].cio_advance(env, scan,
 								   nob);
 	}
@@ -621,7 +621,7 @@ int cl_io_lock_alloc_add(const struct lu_env *env, struct cl_io *io,
 	int result;
 
 	link = kzalloc(sizeof(*link), GFP_NOFS);
-	if (link != NULL) {
+	if (link) {
 		link->cill_descr     = *descr;
 		link->cill_fini      = cl_free_io_lock_link;
 		result = cl_io_lock_add(env, io, link);
@@ -648,7 +648,7 @@ int cl_io_start(const struct lu_env *env, struct cl_io *io)
 
 	io->ci_state = CIS_IO_GOING;
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_start == NULL)
+		if (!scan->cis_iop->op[io->ci_type].cio_start)
 			continue;
 		result = scan->cis_iop->op[io->ci_type].cio_start(env, scan);
 		if (result != 0)
@@ -673,7 +673,7 @@ void cl_io_end(const struct lu_env *env, struct cl_io *io)
 	LINVRNT(cl_io_invariant(io));
 
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->op[io->ci_type].cio_end != NULL)
+		if (scan->cis_iop->op[io->ci_type].cio_end)
 			scan->cis_iop->op[io->ci_type].cio_end(env, scan);
 		/* TODO: error handling. */
 	}
@@ -687,7 +687,7 @@ cl_io_slice_page(const struct cl_io_slice *ios, struct cl_page *page)
 	const struct cl_page_slice *slice;
 
 	slice = cl_page_at(page, ios->cis_obj->co_lu.lo_dev->ld_type);
-	LINVRNT(slice != NULL);
+	LINVRNT(slice);
 	return slice;
 }
 
@@ -759,11 +759,11 @@ int cl_io_read_page(const struct lu_env *env, struct cl_io *io,
 	 * "parallel io" (see CLO_REPEAT loops in cl_lock.c).
 	 */
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->cio_read_page != NULL) {
+		if (scan->cis_iop->cio_read_page) {
 			const struct cl_page_slice *slice;
 
 			slice = cl_io_slice_page(scan, page);
-			LINVRNT(slice != NULL);
+			LINVRNT(slice);
 			result = scan->cis_iop->cio_read_page(env, scan, slice);
 			if (result != 0)
 				break;
@@ -798,7 +798,7 @@ int cl_io_prepare_write(const struct lu_env *env, struct cl_io *io,
 	LASSERT(cl_page_in_io(page, io));
 
 	cl_io_for_each_reverse(scan, io) {
-		if (scan->cis_iop->cio_prepare_write != NULL) {
+		if (scan->cis_iop->cio_prepare_write) {
 			const struct cl_page_slice *slice;
 
 			slice = cl_io_slice_page(scan, page);
@@ -833,11 +833,11 @@ int cl_io_commit_write(const struct lu_env *env, struct cl_io *io,
 	 * state. Better (and more general) way of dealing with such situation
 	 * is needed.
 	 */
-	LASSERT(cl_page_is_owned(page, io) || page->cp_parent != NULL);
+	LASSERT(cl_page_is_owned(page, io) || page->cp_parent);
 	LASSERT(cl_page_in_io(page, io));
 
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->cio_commit_write != NULL) {
+		if (scan->cis_iop->cio_commit_write) {
 			const struct cl_page_slice *slice;
 
 			slice = cl_io_slice_page(scan, page);
@@ -872,7 +872,7 @@ int cl_io_submit_rw(const struct lu_env *env, struct cl_io *io,
 	LINVRNT(crt < ARRAY_SIZE(scan->cis_iop->req_op));
 
 	cl_io_for_each(scan, io) {
-		if (scan->cis_iop->req_op[crt].cio_submit == NULL)
+		if (!scan->cis_iop->req_op[crt].cio_submit)
 			continue;
 		result = scan->cis_iop->req_op[crt].cio_submit(env, scan, crt,
 							       queue);
@@ -900,7 +900,7 @@ int cl_io_submit_sync(const struct lu_env *env, struct cl_io *io,
 	int rc;
 
 	cl_page_list_for_each(pg, &queue->c2_qin) {
-		LASSERT(pg->cp_sync_io == NULL);
+		LASSERT(!pg->cp_sync_io);
 		pg->cp_sync_io = anchor;
 	}
 
@@ -1026,7 +1026,7 @@ void cl_io_slice_add(struct cl_io *io, struct cl_io_slice *slice,
 {
 	struct list_head *linkage = &slice->cis_linkage;
 
-	LASSERT((linkage->prev == NULL && linkage->next == NULL) ||
+	LASSERT((!linkage->prev && !linkage->next) ||
 		list_empty(linkage));
 
 	list_add_tail(linkage, &io->ci_layers);
@@ -1054,7 +1054,7 @@ void cl_page_list_add(struct cl_page_list *plist, struct cl_page *page)
 {
 	/* it would be better to check that page is owned by "current" io, but
 	 * it is not passed here. */
-	LASSERT(page->cp_owner != NULL);
+	LASSERT(page->cp_owner);
 	LINVRNT(plist->pl_owner == current);
 
 	lockdep_off();
@@ -1263,7 +1263,7 @@ EXPORT_SYMBOL(cl_2queue_init_page);
  */
 struct cl_io *cl_io_top(struct cl_io *io)
 {
-	while (io->ci_parent != NULL)
+	while (io->ci_parent)
 		io = io->ci_parent;
 	return io;
 }
@@ -1296,13 +1296,13 @@ static void cl_req_free(const struct lu_env *env, struct cl_req *req)
 	LASSERT(list_empty(&req->crq_pages));
 	LASSERT(req->crq_nrpages == 0);
 	LINVRNT(list_empty(&req->crq_layers));
-	LINVRNT(equi(req->crq_nrobjs > 0, req->crq_o != NULL));
+	LINVRNT(equi(req->crq_nrobjs > 0, req->crq_o));
 
-	if (req->crq_o != NULL) {
+	if (req->crq_o) {
 		for (i = 0; i < req->crq_nrobjs; ++i) {
 			struct cl_object *obj = req->crq_o[i].ro_obj;
 
-			if (obj != NULL) {
+			if (obj) {
 				lu_object_ref_del_at(&obj->co_lu,
 						     &req->crq_o[i].ro_obj_ref,
 						     "cl_req", req);
@@ -1326,7 +1326,7 @@ static int cl_req_init(const struct lu_env *env, struct cl_req *req,
 	do {
 		list_for_each_entry(slice, &page->cp_layers, cpl_linkage) {
 			dev = lu2cl_dev(slice->cpl_obj->co_lu.lo_dev);
-			if (dev->cd_ops->cdo_req_init != NULL) {
+			if (dev->cd_ops->cdo_req_init) {
 				result = dev->cd_ops->cdo_req_init(env,
 								   dev, req);
 				if (result != 0)
@@ -1334,7 +1334,7 @@ static int cl_req_init(const struct lu_env *env, struct cl_req *req,
 			}
 		}
 		page = page->cp_child;
-	} while (page != NULL && result == 0);
+	} while (page && result == 0);
 	return result;
 }
 
@@ -1353,7 +1353,7 @@ void cl_req_completion(const struct lu_env *env, struct cl_req *req, int rc)
 		slice = list_entry(req->crq_layers.prev,
 				       struct cl_req_slice, crs_linkage);
 		list_del_init(&slice->crs_linkage);
-		if (slice->crs_ops->cro_completion != NULL)
+		if (slice->crs_ops->cro_completion)
 			slice->crs_ops->cro_completion(env, slice, rc);
 	}
 	cl_req_free(env, req);
@@ -1371,7 +1371,7 @@ struct cl_req *cl_req_alloc(const struct lu_env *env, struct cl_page *page,
 	LINVRNT(nr_objects > 0);
 
 	req = kzalloc(sizeof(*req), GFP_NOFS);
-	if (req != NULL) {
+	if (req) {
 		int result;
 
 		req->crq_type = crt;
@@ -1380,7 +1380,7 @@ struct cl_req *cl_req_alloc(const struct lu_env *env, struct cl_page *page,
 
 		req->crq_o = kcalloc(nr_objects, sizeof(req->crq_o[0]),
 				     GFP_NOFS);
-		if (req->crq_o != NULL) {
+		if (req->crq_o) {
 			req->crq_nrobjs = nr_objects;
 			result = cl_req_init(env, req, page);
 		} else
@@ -1408,7 +1408,7 @@ void cl_req_page_add(const struct lu_env *env,
 	page = cl_page_top(page);
 
 	LASSERT(list_empty(&page->cp_flight));
-	LASSERT(page->cp_req == NULL);
+	LASSERT(!page->cp_req);
 
 	CL_PAGE_DEBUG(D_PAGE, env, page, "req %p, %d, %u\n",
 		      req, req->crq_type, req->crq_nrpages);
@@ -1418,7 +1418,7 @@ void cl_req_page_add(const struct lu_env *env,
 	page->cp_req = req;
 	obj = cl_object_top(page->cp_obj);
 	for (i = 0, rqo = req->crq_o; obj != rqo->ro_obj; ++i, ++rqo) {
-		if (rqo->ro_obj == NULL) {
+		if (!rqo->ro_obj) {
 			rqo->ro_obj = obj;
 			cl_object_get(obj);
 			lu_object_ref_add_at(&obj->co_lu, &rqo->ro_obj_ref,
@@ -1463,11 +1463,11 @@ int cl_req_prep(const struct lu_env *env, struct cl_req *req)
 	 * of objects.
 	 */
 	for (i = 0; i < req->crq_nrobjs; ++i)
-		LASSERT(req->crq_o[i].ro_obj != NULL);
+		LASSERT(req->crq_o[i].ro_obj);
 
 	result = 0;
 	list_for_each_entry(slice, &req->crq_layers, crs_linkage) {
-		if (slice->crs_ops->cro_prep != NULL) {
+		if (slice->crs_ops->cro_prep) {
 			result = slice->crs_ops->cro_prep(env, slice);
 			if (result != 0)
 				break;
@@ -1501,9 +1501,8 @@ void cl_req_attr_set(const struct lu_env *env, struct cl_req *req,
 
 			scan = cl_page_at(page,
 					  slice->crs_dev->cd_lu_dev.ld_type);
-			LASSERT(scan != NULL);
 			obj = scan->cpl_obj;
-			if (slice->crs_ops->cro_attr_set != NULL)
+			if (slice->crs_ops->cro_attr_set)
 				slice->crs_ops->cro_attr_set(env, slice, obj,
 							     attr + i, flags);
 		}
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_lock.c b/drivers/staging/lustre/lustre/obdclass/cl_lock.c
index 1836dc0..57cb100 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_lock.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_lock.c
@@ -96,7 +96,7 @@ static int cl_lock_invariant(const struct lu_env *env,
 
 	result = atomic_read(&lock->cll_ref) > 0 &&
 		cl_lock_invariant_trusted(env, lock);
-	if (!result && env != NULL)
+	if (!result && env)
 		CL_LOCK_DEBUG(D_ERROR, env, lock, "invariant broken");
 	return result;
 }
@@ -288,7 +288,7 @@ void cl_lock_put(const struct lu_env *env, struct cl_lock *lock)
 
 	LINVRNT(cl_lock_invariant(env, lock));
 	obj = lock->cll_descr.cld_obj;
-	LINVRNT(obj != NULL);
+	LINVRNT(obj);
 
 	CDEBUG(D_TRACE, "releasing reference: %d %p %lu\n",
 	       atomic_read(&lock->cll_ref), lock, RETIP);
@@ -362,7 +362,7 @@ static struct cl_lock *cl_lock_alloc(const struct lu_env *env,
 	struct lu_object_header *head;
 
 	lock = kmem_cache_alloc(cl_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (lock != NULL) {
+	if (lock) {
 		atomic_set(&lock->cll_ref, 1);
 		lock->cll_descr = *descr;
 		lock->cll_state = CLS_NEW;
@@ -461,7 +461,7 @@ static int cl_lock_fits_into(const struct lu_env *env,
 
 	LINVRNT(cl_lock_invariant_trusted(env, lock));
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_fits_into != NULL &&
+		if (slice->cls_ops->clo_fits_into &&
 		    !slice->cls_ops->clo_fits_into(env, slice, need, io))
 			return 0;
 	}
@@ -524,14 +524,14 @@ static struct cl_lock *cl_lock_find(const struct lu_env *env,
 	lock = cl_lock_lookup(env, obj, io, need);
 	spin_unlock(&head->coh_lock_guard);
 
-	if (lock == NULL) {
+	if (!lock) {
 		lock = cl_lock_alloc(env, obj, io, need);
 		if (!IS_ERR(lock)) {
 			struct cl_lock *ghost;
 
 			spin_lock(&head->coh_lock_guard);
 			ghost = cl_lock_lookup(env, obj, io, need);
-			if (ghost == NULL) {
+			if (!ghost) {
 				cl_lock_get_trust(lock);
 				list_add_tail(&lock->cll_linkage,
 						  &head->coh_locks);
@@ -572,7 +572,7 @@ struct cl_lock *cl_lock_peek(const struct lu_env *env, const struct cl_io *io,
 		spin_lock(&head->coh_lock_guard);
 		lock = cl_lock_lookup(env, obj, io, need);
 		spin_unlock(&head->coh_lock_guard);
-		if (lock == NULL)
+		if (!lock)
 			return NULL;
 
 		cl_lock_mutex_get(env, lock);
@@ -584,7 +584,7 @@ struct cl_lock *cl_lock_peek(const struct lu_env *env, const struct cl_io *io,
 			cl_lock_put(env, lock);
 			lock = NULL;
 		}
-	} while (lock == NULL);
+	} while (!lock);
 
 	cl_lock_hold_add(env, lock, scope, source);
 	cl_lock_user_add(env, lock);
@@ -775,7 +775,7 @@ static void cl_lock_cancel0(const struct lu_env *env, struct cl_lock *lock)
 		lock->cll_flags |= CLF_CANCELLED;
 		list_for_each_entry_reverse(slice, &lock->cll_layers,
 						cls_linkage) {
-			if (slice->cls_ops->clo_cancel != NULL)
+			if (slice->cls_ops->clo_cancel)
 				slice->cls_ops->clo_cancel(env, slice);
 		}
 	}
@@ -812,7 +812,7 @@ static void cl_lock_delete0(const struct lu_env *env, struct cl_lock *lock)
 		 */
 		list_for_each_entry_reverse(slice, &lock->cll_layers,
 						cls_linkage) {
-			if (slice->cls_ops->clo_delete != NULL)
+			if (slice->cls_ops->clo_delete)
 				slice->cls_ops->clo_delete(env, slice);
 		}
 		/*
@@ -974,7 +974,7 @@ static void cl_lock_state_signal(const struct lu_env *env, struct cl_lock *lock,
 	LINVRNT(cl_lock_invariant(env, lock));
 
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage)
-		if (slice->cls_ops->clo_state != NULL)
+		if (slice->cls_ops->clo_state)
 			slice->cls_ops->clo_state(env, slice, state);
 	wake_up_all(&lock->cll_wq);
 }
@@ -1039,7 +1039,7 @@ static int cl_unuse_try_internal(const struct lu_env *env, struct cl_lock *lock)
 		result = -ENOSYS;
 		list_for_each_entry_reverse(slice, &lock->cll_layers,
 						cls_linkage) {
-			if (slice->cls_ops->clo_unuse != NULL) {
+			if (slice->cls_ops->clo_unuse) {
 				result = slice->cls_ops->clo_unuse(env, slice);
 				if (result != 0)
 					break;
@@ -1072,7 +1072,7 @@ int cl_use_try(const struct lu_env *env, struct cl_lock *lock, int atomic)
 	result = -ENOSYS;
 	state = cl_lock_intransit(env, lock);
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_use != NULL) {
+		if (slice->cls_ops->clo_use) {
 			result = slice->cls_ops->clo_use(env, slice);
 			if (result != 0)
 				break;
@@ -1125,7 +1125,7 @@ static int cl_enqueue_kick(const struct lu_env *env,
 
 	result = -ENOSYS;
 	list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_enqueue != NULL) {
+		if (slice->cls_ops->clo_enqueue) {
 			result = slice->cls_ops->clo_enqueue(env,
 							     slice, io, flags);
 			if (result != 0)
@@ -1215,7 +1215,7 @@ int cl_lock_enqueue_wait(const struct lu_env *env,
 
 	LASSERT(cl_lock_is_mutexed(lock));
 	LASSERT(lock->cll_state == CLS_QUEUING);
-	LASSERT(lock->cll_conflict != NULL);
+	LASSERT(lock->cll_conflict);
 
 	conflict = lock->cll_conflict;
 	lock->cll_conflict = NULL;
@@ -1258,7 +1258,7 @@ static int cl_enqueue_locked(const struct lu_env *env, struct cl_lock *lock,
 	do {
 		result = cl_enqueue_try(env, lock, io, enqflags);
 		if (result == CLO_WAIT) {
-			if (lock->cll_conflict != NULL)
+			if (lock->cll_conflict)
 				result = cl_lock_enqueue_wait(env, lock, 1);
 			else
 				result = cl_lock_state_wait(env, lock);
@@ -1416,7 +1416,7 @@ int cl_wait_try(const struct lu_env *env, struct cl_lock *lock)
 
 		result = -ENOSYS;
 		list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-			if (slice->cls_ops->clo_wait != NULL) {
+			if (slice->cls_ops->clo_wait) {
 				result = slice->cls_ops->clo_wait(env, slice);
 				if (result != 0)
 					break;
@@ -1487,7 +1487,7 @@ unsigned long cl_lock_weigh(const struct lu_env *env, struct cl_lock *lock)
 
 	pound = 0;
 	list_for_each_entry_reverse(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_weigh != NULL) {
+		if (slice->cls_ops->clo_weigh) {
 			ounce = slice->cls_ops->clo_weigh(env, slice);
 			pound += ounce;
 			if (pound < ounce) /* over-weight^Wflow */
@@ -1523,7 +1523,7 @@ int cl_lock_modify(const struct lu_env *env, struct cl_lock *lock,
 	LINVRNT(cl_lock_invariant(env, lock));
 
 	list_for_each_entry_reverse(slice, &lock->cll_layers, cls_linkage) {
-		if (slice->cls_ops->clo_modify != NULL) {
+		if (slice->cls_ops->clo_modify) {
 			result = slice->cls_ops->clo_modify(env, slice, desc);
 			if (result != 0)
 				return result;
@@ -1584,7 +1584,7 @@ int cl_lock_closure_build(const struct lu_env *env, struct cl_lock *lock,
 	result = cl_lock_enclosure(env, lock, closure);
 	if (result == 0) {
 		list_for_each_entry(slice, &lock->cll_layers, cls_linkage) {
-			if (slice->cls_ops->clo_closure != NULL) {
+			if (slice->cls_ops->clo_closure) {
 				result = slice->cls_ops->clo_closure(env, slice,
 								     closure);
 				if (result != 0)
@@ -1820,7 +1820,6 @@ static pgoff_t pgoff_at_lock(struct cl_page *page, struct cl_lock *lock)
 
 	dtype = lock->cll_descr.cld_obj->co_lu.lo_dev->ld_type;
 	slice = cl_page_at(page, dtype);
-	LASSERT(slice != NULL);
 	return slice->cpl_page->cp_index;
 }
 
@@ -1840,7 +1839,7 @@ static int check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
 		/* refresh non-overlapped index */
 		tmp = cl_lock_at_pgoff(env, lock->cll_descr.cld_obj, index,
 					lock, 1, 0);
-		if (tmp != NULL) {
+		if (tmp) {
 			/* Cache the first-non-overlapped index so as to skip
 			 * all pages within [index, clt_fn_index). This
 			 * is safe because if tmp lock is canceled, it will
@@ -1950,7 +1949,7 @@ void cl_locks_prune(const struct lu_env *env, struct cl_object *obj, int cancel)
 	 * already destroyed (as otherwise they will be left unprotected).
 	 */
 	LASSERT(ergo(!cancel,
-		     head->coh_tree.rnode == NULL && head->coh_pages == 0));
+		     !head->coh_tree.rnode && head->coh_pages == 0));
 
 	spin_lock(&head->coh_lock_guard);
 	while (!list_empty(&head->coh_locks)) {
@@ -2194,7 +2193,7 @@ void cl_lock_print(const struct lu_env *env, void *cookie,
 		(*printer)(env, cookie, "    %s@%p: ",
 			   slice->cls_obj->co_lu.lo_dev->ld_type->ldt_name,
 			   slice);
-		if (slice->cls_ops->clo_print != NULL)
+		if (slice->cls_ops->clo_print)
 			slice->cls_ops->clo_print(env, cookie, printer, slice);
 		(*printer)(env, cookie, "\n");
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c b/drivers/staging/lustre/lustre/obdclass/cl_object.c
index f118983..39b4fd0 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_object.c
@@ -152,7 +152,7 @@ struct cl_object *cl_object_top(struct cl_object *o)
 	struct cl_object_header *hdr = cl_object_header(o);
 	struct cl_object *top;
 
-	while (hdr->coh_parent != NULL)
+	while (hdr->coh_parent)
 		hdr = hdr->coh_parent;
 
 	top = lu2cl(lu_object_top(&hdr->coh_lu));
@@ -217,7 +217,7 @@ int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj,
 	top = obj->co_lu.lo_header;
 	result = 0;
 	list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
-		if (obj->co_ops->coo_attr_get != NULL) {
+		if (obj->co_ops->coo_attr_get) {
 			result = obj->co_ops->coo_attr_get(env, obj, attr);
 			if (result != 0) {
 				if (result > 0)
@@ -249,7 +249,7 @@ int cl_object_attr_set(const struct lu_env *env, struct cl_object *obj,
 	result = 0;
 	list_for_each_entry_reverse(obj, &top->loh_layers,
 					co_lu.lo_linkage) {
-		if (obj->co_ops->coo_attr_set != NULL) {
+		if (obj->co_ops->coo_attr_set) {
 			result = obj->co_ops->coo_attr_set(env, obj, attr, v);
 			if (result != 0) {
 				if (result > 0)
@@ -280,7 +280,7 @@ int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
 	result = 0;
 	list_for_each_entry_reverse(obj, &top->loh_layers,
 					co_lu.lo_linkage) {
-		if (obj->co_ops->coo_glimpse != NULL) {
+		if (obj->co_ops->coo_glimpse) {
 			result = obj->co_ops->coo_glimpse(env, obj, lvb);
 			if (result != 0)
 				break;
@@ -306,7 +306,7 @@ int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
 	top = obj->co_lu.lo_header;
 	result = 0;
 	list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
-		if (obj->co_ops->coo_conf_set != NULL) {
+		if (obj->co_ops->coo_conf_set) {
 			result = obj->co_ops->coo_conf_set(env, obj, conf);
 			if (result != 0)
 				break;
@@ -328,7 +328,7 @@ void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
 	struct cl_object_header *hdr;
 
 	hdr = cl_object_header(obj);
-	LASSERT(hdr->coh_tree.rnode == NULL);
+	LASSERT(!hdr->coh_tree.rnode);
 	LASSERT(hdr->coh_pages == 0);
 
 	set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
@@ -541,7 +541,7 @@ static void cl_env_init0(struct cl_env *cle, void *debug)
 {
 	LASSERT(cle->ce_ref == 0);
 	LASSERT(cle->ce_magic == &cl_env_init0);
-	LASSERT(cle->ce_debug == NULL && cle->ce_owner == NULL);
+	LASSERT(!cle->ce_debug && !cle->ce_owner);
 
 	cle->ce_ref = 1;
 	cle->ce_debug = debug;
@@ -576,7 +576,7 @@ static int cl_env_hops_keycmp(const void *key, struct hlist_node *hn)
 {
 	struct cl_env *cle = cl_env_hops_obj(hn);
 
-	LASSERT(cle->ce_owner != NULL);
+	LASSERT(cle->ce_owner);
 	return (key == cle->ce_owner);
 }
 
@@ -610,7 +610,7 @@ static inline void cl_env_attach(struct cl_env *cle)
 	if (cle) {
 		int rc;
 
-		LASSERT(cle->ce_owner == NULL);
+		LASSERT(!cle->ce_owner);
 		cle->ce_owner = (void *) (long) current->pid;
 		rc = cfs_hash_add_unique(cl_env_hash, cle->ce_owner,
 					 &cle->ce_node);
@@ -638,7 +638,7 @@ static int cl_env_store_init(void)
 				      CFS_HASH_MAX_THETA,
 				      &cl_env_hops,
 				      CFS_HASH_RW_BKTLOCK);
-	return cl_env_hash != NULL ? 0 : -ENOMEM;
+	return cl_env_hash ? 0 : -ENOMEM;
 }
 
 static void cl_env_store_fini(void)
@@ -648,7 +648,7 @@ static void cl_env_store_fini(void)
 
 static inline struct cl_env *cl_env_detach(struct cl_env *cle)
 {
-	if (cle == NULL)
+	if (!cle)
 		cle = cl_env_fetch();
 
 	if (cle && cle->ce_owner)
@@ -663,7 +663,7 @@ static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
 	struct cl_env *cle;
 
 	cle = kmem_cache_alloc(cl_env_kmem, GFP_NOFS | __GFP_ZERO);
-	if (cle != NULL) {
+	if (cle) {
 		int rc;
 
 		INIT_LIST_HEAD(&cle->ce_linkage);
@@ -717,7 +717,7 @@ static struct lu_env *cl_env_peek(int *refcheck)
 
 	env = NULL;
 	cle = cl_env_fetch();
-	if (cle != NULL) {
+	if (cle) {
 		CL_ENV_INC(hit);
 		env = &cle->ce_lu;
 		*refcheck = ++cle->ce_ref;
@@ -742,7 +742,7 @@ struct lu_env *cl_env_get(int *refcheck)
 	struct lu_env *env;
 
 	env = cl_env_peek(refcheck);
-	if (env == NULL) {
+	if (!env) {
 		env = cl_env_new(lu_context_tags_default,
 				 lu_session_tags_default,
 				 __builtin_return_address(0));
@@ -769,7 +769,7 @@ struct lu_env *cl_env_alloc(int *refcheck, __u32 tags)
 {
 	struct lu_env *env;
 
-	LASSERT(cl_env_peek(refcheck) == NULL);
+	LASSERT(!cl_env_peek(refcheck));
 	env = cl_env_new(tags, tags, __builtin_return_address(0));
 	if (!IS_ERR(env)) {
 		struct cl_env *cle;
@@ -784,7 +784,7 @@ EXPORT_SYMBOL(cl_env_alloc);
 
 static void cl_env_exit(struct cl_env *cle)
 {
-	LASSERT(cle->ce_owner == NULL);
+	LASSERT(!cle->ce_owner);
 	lu_context_exit(&cle->ce_lu.le_ctx);
 	lu_context_exit(&cle->ce_ses);
 }
@@ -803,7 +803,7 @@ void cl_env_put(struct lu_env *env, int *refcheck)
 	cle = cl_env_container(env);
 
 	LASSERT(cle->ce_ref > 0);
-	LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
+	LASSERT(ergo(refcheck, cle->ce_ref == *refcheck));
 
 	CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
 	if (--cle->ce_ref == 0) {
@@ -878,7 +878,7 @@ struct lu_env *cl_env_nested_get(struct cl_env_nest *nest)
 
 	nest->cen_cookie = NULL;
 	env = cl_env_peek(&nest->cen_refcheck);
-	if (env != NULL) {
+	if (env) {
 		if (!cl_io_is_going(env))
 			return env;
 		cl_env_put(env, &nest->cen_refcheck);
@@ -930,14 +930,12 @@ struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
 	const char       *typename;
 	struct lu_device *d;
 
-	LASSERT(ldt != NULL);
-
 	typename = ldt->ldt_name;
 	d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
 	if (!IS_ERR(d)) {
 		int rc;
 
-		if (site != NULL)
+		if (site)
 			d->ld_site = site;
 		rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
 		if (rc == 0) {
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_page.c b/drivers/staging/lustre/lustre/obdclass/cl_page.c
index 61f28eb..72f9924 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_page.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_page.c
@@ -69,7 +69,7 @@ static void cl_page_delete0(const struct lu_env *env, struct cl_page *pg,
  */
 static struct cl_page *cl_page_top_trusted(struct cl_page *page)
 {
-	while (page->cp_parent != NULL)
+	while (page->cp_parent)
 		page = page->cp_parent;
 	return page;
 }
@@ -110,7 +110,7 @@ cl_page_at_trusted(const struct cl_page *page,
 				return slice;
 		}
 		page = page->cp_child;
-	} while (page != NULL);
+	} while (page);
 	return NULL;
 }
 
@@ -127,7 +127,7 @@ struct cl_page *cl_page_lookup(struct cl_object_header *hdr, pgoff_t index)
 	assert_spin_locked(&hdr->coh_page_guard);
 
 	page = radix_tree_lookup(&hdr->coh_tree, index);
-	if (page != NULL)
+	if (page)
 		cl_page_get_trust(page);
 	return page;
 }
@@ -188,7 +188,7 @@ int cl_page_gang_lookup(const struct lu_env *env, struct cl_object *obj,
 			 * Pages for lsm-less file has no underneath sub-page
 			 * for osc, in case of ...
 			 */
-			PASSERT(env, page, slice != NULL);
+			PASSERT(env, page, slice);
 
 			page = slice->cpl_page;
 			/*
@@ -245,9 +245,9 @@ static void cl_page_free(const struct lu_env *env, struct cl_page *page)
 	struct cl_object *obj  = page->cp_obj;
 
 	PASSERT(env, page, list_empty(&page->cp_batch));
-	PASSERT(env, page, page->cp_owner == NULL);
-	PASSERT(env, page, page->cp_req == NULL);
-	PASSERT(env, page, page->cp_parent == NULL);
+	PASSERT(env, page, !page->cp_owner);
+	PASSERT(env, page, !page->cp_req);
+	PASSERT(env, page, !page->cp_parent);
 	PASSERT(env, page, page->cp_state == CPS_FREEING);
 
 	might_sleep();
@@ -284,7 +284,7 @@ static struct cl_page *cl_page_alloc(const struct lu_env *env,
 	struct lu_object_header *head;
 
 	page = kzalloc(cl_object_header(o)->coh_page_bufsize, GFP_NOFS);
-	if (page != NULL) {
+	if (page) {
 		int result = 0;
 
 		atomic_set(&page->cp_ref, 1);
@@ -305,7 +305,7 @@ static struct cl_page *cl_page_alloc(const struct lu_env *env,
 		head = o->co_lu.lo_header;
 		list_for_each_entry(o, &head->loh_layers,
 					co_lu.lo_linkage) {
-			if (o->co_ops->coo_page_init != NULL) {
+			if (o->co_ops->coo_page_init) {
 				result = o->co_ops->coo_page_init(env, o,
 								  page, vmpage);
 				if (result != 0) {
@@ -369,13 +369,13 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 		 */
 		page = cl_vmpage_page(vmpage, o);
 		PINVRNT(env, page,
-			ergo(page != NULL,
+			ergo(page,
 			     cl_page_vmpage(env, page) == vmpage &&
 			     (void *)radix_tree_lookup(&hdr->coh_tree,
 						       idx) == page));
 	}
 
-	if (page != NULL)
+	if (page)
 		return page;
 
 	/* allocate and initialize cl_page */
@@ -385,7 +385,7 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 
 	if (type == CPT_TRANSIENT) {
 		if (parent) {
-			LASSERT(page->cp_parent == NULL);
+			LASSERT(!page->cp_parent);
 			page->cp_parent = parent;
 			parent->cp_child = page;
 		}
@@ -418,7 +418,7 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 			      "fail to insert into radix tree: %d\n", err);
 	} else {
 		if (parent) {
-			LASSERT(page->cp_parent == NULL);
+			LASSERT(!page->cp_parent);
 			page->cp_parent = parent;
 			parent->cp_child = page;
 		}
@@ -426,7 +426,7 @@ static struct cl_page *cl_page_find0(const struct lu_env *env,
 	}
 	spin_unlock(&hdr->coh_page_guard);
 
-	if (unlikely(ghost != NULL)) {
+	if (unlikely(ghost)) {
 		cl_page_delete0(env, ghost, 0);
 		cl_page_free(env, ghost);
 	}
@@ -467,14 +467,13 @@ static inline int cl_page_invariant(const struct cl_page *pg)
 	owner  = pg->cp_owner;
 
 	return cl_page_in_use(pg) &&
-		ergo(parent != NULL, parent->cp_child == pg) &&
-		ergo(child != NULL, child->cp_parent == pg) &&
-		ergo(child != NULL, pg->cp_obj != child->cp_obj) &&
-		ergo(parent != NULL, pg->cp_obj != parent->cp_obj) &&
-		ergo(owner != NULL && parent != NULL,
+		ergo(parent, parent->cp_child == pg) &&
+		ergo(child, child->cp_parent == pg) &&
+		ergo(child, pg->cp_obj != child->cp_obj) &&
+		ergo(parent, pg->cp_obj != parent->cp_obj) &&
+		ergo(owner && parent,
 		     parent->cp_owner == pg->cp_owner->ci_parent) &&
-		ergo(owner != NULL && child != NULL,
-		     child->cp_owner->ci_parent == owner) &&
+		ergo(owner && child, child->cp_owner->ci_parent == owner) &&
 		/*
 		 * Either page is early in initialization (has neither child
 		 * nor parent yet), or it is in the object radix tree.
@@ -482,7 +481,7 @@ static inline int cl_page_invariant(const struct cl_page *pg)
 		ergo(pg->cp_state < CPS_FREEING && pg->cp_type == CPT_CACHEABLE,
 		     (void *)radix_tree_lookup(&header->coh_tree,
 					       pg->cp_index) == pg ||
-		     (child == NULL && parent == NULL));
+		     (!child && !parent));
 }
 
 static void cl_page_state_set0(const struct lu_env *env,
@@ -535,10 +534,10 @@ static void cl_page_state_set0(const struct lu_env *env,
 	old = page->cp_state;
 	PASSERT(env, page, allowed_transitions[old][state]);
 	CL_PAGE_HEADER(D_TRACE, env, page, "%d -> %d\n", old, state);
-	for (; page != NULL; page = page->cp_child) {
+	for (; page; page = page->cp_child) {
 		PASSERT(env, page, page->cp_state == old);
 		PASSERT(env, page,
-			equi(state == CPS_OWNED, page->cp_owner != NULL));
+			equi(state == CPS_OWNED, page->cp_owner));
 
 		cl_page_state_set_trust(page, state);
 	}
@@ -584,7 +583,7 @@ void cl_page_put(const struct lu_env *env, struct cl_page *page)
 		LASSERT(page->cp_state == CPS_FREEING);
 
 		LASSERT(atomic_read(&page->cp_ref) == 0);
-		PASSERT(env, page, page->cp_owner == NULL);
+		PASSERT(env, page, !page->cp_owner);
 		PASSERT(env, page, list_empty(&page->cp_batch));
 		/*
 		 * Page is no longer reachable by other threads. Tear
@@ -609,11 +608,11 @@ struct page *cl_page_vmpage(const struct lu_env *env, struct cl_page *page)
 	page = cl_page_top(page);
 	do {
 		list_for_each_entry(slice, &page->cp_layers, cpl_linkage) {
-			if (slice->cpl_ops->cpo_vmpage != NULL)
+			if (slice->cpl_ops->cpo_vmpage)
 				return slice->cpl_ops->cpo_vmpage(env, slice);
 		}
 		page = page->cp_child;
-	} while (page != NULL);
+	} while (page);
 	LBUG(); /* ->cpo_vmpage() has to be defined somewhere in the stack */
 }
 EXPORT_SYMBOL(cl_page_vmpage);
@@ -639,10 +638,10 @@ struct cl_page *cl_vmpage_page(struct page *vmpage, struct cl_object *obj)
 	 * can be rectified easily.
 	 */
 	top = (struct cl_page *)vmpage->private;
-	if (top == NULL)
+	if (!top)
 		return NULL;
 
-	for (page = top; page != NULL; page = page->cp_child) {
+	for (page = top; page; page = page->cp_child) {
 		if (cl_object_same(page->cp_obj, obj)) {
 			cl_page_get_trust(page);
 			break;
@@ -689,7 +688,7 @@ EXPORT_SYMBOL(cl_page_at);
 					cpl_linkage) {		  \
 			__method = *(void **)((char *)__scan->cpl_ops + \
 					      __op);		    \
-			if (__method != NULL) {			 \
+			if (__method) {					\
 				__result = (*__method)(__env, __scan,   \
 						       ## __VA_ARGS__); \
 				if (__result != 0)		      \
@@ -697,7 +696,7 @@ EXPORT_SYMBOL(cl_page_at);
 			}					       \
 		}						       \
 		__page = __page->cp_child;			      \
-	} while (__page != NULL && __result == 0);		      \
+	} while (__page && __result == 0);			      \
 	if (__result > 0)					       \
 		__result = 0;					   \
 	__result;						       \
@@ -717,12 +716,12 @@ do {								    \
 					cpl_linkage) {		  \
 			__method = *(void **)((char *)__scan->cpl_ops + \
 					      __op);		    \
-			if (__method != NULL)			   \
+			if (__method)				   \
 				(*__method)(__env, __scan,	      \
 					    ## __VA_ARGS__);	    \
 		}						       \
 		__page = __page->cp_child;			      \
-	} while (__page != NULL);				       \
+	} while (__page);					       \
 } while (0)
 
 #define CL_PAGE_INVOID_REVERSE(_env, _page, _op, _proto, ...)	       \
@@ -734,19 +733,19 @@ do {									\
 	void		      (*__method)_proto;			\
 									    \
 	/* get to the bottom page. */				       \
-	while (__page->cp_child != NULL)				    \
+	while (__page->cp_child)					    \
 		__page = __page->cp_child;				  \
 	do {								\
 		list_for_each_entry_reverse(__scan, &__page->cp_layers, \
 						cpl_linkage) {	      \
 			__method = *(void **)((char *)__scan->cpl_ops +     \
 					      __op);			\
-			if (__method != NULL)			       \
+			if (__method)				       \
 				(*__method)(__env, __scan,		  \
 					    ## __VA_ARGS__);		\
 		}							   \
 		__page = __page->cp_parent;				 \
-	} while (__page != NULL);					   \
+	} while (__page);						   \
 } while (0)
 
 static int cl_page_invoke(const struct lu_env *env,
@@ -772,8 +771,8 @@ static void cl_page_invoid(const struct lu_env *env,
 
 static void cl_page_owner_clear(struct cl_page *page)
 {
-	for (page = cl_page_top(page); page != NULL; page = page->cp_child) {
-		if (page->cp_owner != NULL) {
+	for (page = cl_page_top(page); page; page = page->cp_child) {
+		if (page->cp_owner) {
 			LASSERT(page->cp_owner->ci_owned_nr > 0);
 			page->cp_owner->ci_owned_nr--;
 			page->cp_owner = NULL;
@@ -784,10 +783,8 @@ static void cl_page_owner_clear(struct cl_page *page)
 
 static void cl_page_owner_set(struct cl_page *page)
 {
-	for (page = cl_page_top(page); page != NULL; page = page->cp_child) {
-		LASSERT(page->cp_owner != NULL);
+	for (page = cl_page_top(page); page; page = page->cp_child)
 		page->cp_owner->ci_owned_nr++;
-	}
 }
 
 void cl_page_disown0(const struct lu_env *env,
@@ -862,8 +859,8 @@ static int cl_page_own0(const struct lu_env *env, struct cl_io *io,
 					 struct cl_io *, int),
 					io, nonblock);
 		if (result == 0) {
-			PASSERT(env, pg, pg->cp_owner == NULL);
-			PASSERT(env, pg, pg->cp_req == NULL);
+			PASSERT(env, pg, !pg->cp_owner);
+			PASSERT(env, pg, !pg->cp_req);
 			pg->cp_owner = io;
 			pg->cp_task  = current;
 			cl_page_owner_set(pg);
@@ -921,7 +918,7 @@ void cl_page_assume(const struct lu_env *env,
 	io = cl_io_top(io);
 
 	cl_page_invoid(env, io, pg, CL_PAGE_OP(cpo_assume));
-	PASSERT(env, pg, pg->cp_owner == NULL);
+	PASSERT(env, pg, !pg->cp_owner);
 	pg->cp_owner = io;
 	pg->cp_task = current;
 	cl_page_owner_set(pg);
@@ -1037,7 +1034,7 @@ static void cl_page_delete0(const struct lu_env *env, struct cl_page *pg,
 			 * skip removing it.
 			 */
 			tmp = pg->cp_child;
-		for (; tmp != NULL; tmp = tmp->cp_child) {
+		for (; tmp; tmp = tmp->cp_child) {
 			void		    *value;
 			struct cl_object_header *hdr;
 
@@ -1135,7 +1132,7 @@ int cl_page_is_vmlocked(const struct lu_env *env, const struct cl_page *pg)
 	pg = cl_page_top_trusted((struct cl_page *)pg);
 	slice = container_of(pg->cp_layers.next,
 			     const struct cl_page_slice, cpl_linkage);
-	PASSERT(env, pg, slice->cpl_ops->cpo_is_vmlocked != NULL);
+	PASSERT(env, pg, slice->cpl_ops->cpo_is_vmlocked);
 	/*
 	 * Call ->cpo_is_vmlocked() directly instead of going through
 	 * CL_PAGE_INVOKE(), because cl_page_is_vmlocked() is used by
@@ -1216,7 +1213,7 @@ void cl_page_completion(const struct lu_env *env,
 
 	PASSERT(env, pg, crt < CRT_NR);
 	/* cl_page::cp_req already cleared by the caller (osc_completion()) */
-	PASSERT(env, pg, pg->cp_req == NULL);
+	PASSERT(env, pg, !pg->cp_req);
 	PASSERT(env, pg, pg->cp_state == cl_req_type_state(crt));
 
 	CL_PAGE_HEADER(D_TRACE, env, pg, "%d %d\n", crt, ioret);
@@ -1304,7 +1301,7 @@ int cl_page_cache_add(const struct lu_env *env, struct cl_io *io,
 		return -EINVAL;
 
 	list_for_each_entry(scan, &pg->cp_layers, cpl_linkage) {
-		if (scan->cpl_ops->io[crt].cpo_cache_add == NULL)
+		if (!scan->cpl_ops->io[crt].cpo_cache_add)
 			continue;
 
 		result = scan->cpl_ops->io[crt].cpo_cache_add(env, scan, io);
@@ -1450,8 +1447,8 @@ void cl_page_print(const struct lu_env *env, void *cookie,
 {
 	struct cl_page *scan;
 
-	for (scan = cl_page_top((struct cl_page *)pg);
-	     scan != NULL; scan = scan->cp_child)
+	for (scan = cl_page_top((struct cl_page *)pg); scan;
+	     scan = scan->cp_child)
 		cl_page_header_print(env, cookie, printer, scan);
 	CL_PAGE_INVOKE(env, (struct cl_page *)pg, CL_PAGE_OP(cpo_print),
 		       (const struct lu_env *env,
diff --git a/drivers/staging/lustre/lustre/obdclass/class_obd.c b/drivers/staging/lustre/lustre/obdclass/class_obd.c
index 84f6880..4b7e21f 100644
--- a/drivers/staging/lustre/lustre/obdclass/class_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/class_obd.c
@@ -341,7 +341,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 	}
 
 	if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
-		if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL) {
+		if (data->ioc_inllen4 <= 0 || !data->ioc_inlbuf4) {
 			err = -EINVAL;
 			goto out;
 		}
@@ -358,7 +358,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 		goto out;
 	}
 
-	if (obd == NULL) {
+	if (!obd) {
 		CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 		err = -EINVAL;
 		goto out;
diff --git a/drivers/staging/lustre/lustre/obdclass/genops.c b/drivers/staging/lustre/lustre/obdclass/genops.c
index 1cb68df..10b8d33 100644
--- a/drivers/staging/lustre/lustre/obdclass/genops.c
+++ b/drivers/staging/lustre/lustre/obdclass/genops.c
@@ -70,17 +70,16 @@ static struct obd_device *obd_device_alloc(void)
 	struct obd_device *obd;
 
 	obd = kmem_cache_alloc(obd_device_cachep, GFP_NOFS | __GFP_ZERO);
-	if (obd != NULL)
+	if (obd)
 		obd->obd_magic = OBD_DEVICE_MAGIC;
 	return obd;
 }
 
 static void obd_device_free(struct obd_device *obd)
 {
-	LASSERT(obd != NULL);
 	LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n",
 		 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
-	if (obd->obd_namespace != NULL) {
+	if (obd->obd_namespace) {
 		CERROR("obd %p: namespace %p was not properly cleaned up (obd_force=%d)!\n",
 		       obd, obd->obd_namespace, obd->obd_force);
 		LBUG();
@@ -194,7 +193,7 @@ int class_register_type(struct obd_ops *dt_ops, struct md_ops *md_ops,
 		goto failed;
 	}
 
-	if (ldt != NULL) {
+	if (ldt) {
 		type->typ_lu = ldt;
 		rc = lu_device_type_init(ldt);
 		if (rc != 0)
@@ -356,7 +355,7 @@ void class_release_dev(struct obd_device *obd)
 		 obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 	LASSERTF(obd == obd_devs[obd->obd_minor], "obd %p != obd_devs[%d] %p\n",
 		 obd, obd->obd_minor, obd_devs[obd->obd_minor]);
-	LASSERT(obd_type != NULL);
+	LASSERT(obd_type);
 
 	CDEBUG(D_INFO, "Release obd device %s at %d obd_type name =%s\n",
 	       obd->obd_name, obd->obd_minor, obd->obd_type->typ_name);
@@ -650,7 +649,7 @@ static void class_export_destroy(struct obd_export *exp)
 	struct obd_device *obd = exp->exp_obd;
 
 	LASSERT_ATOMIC_ZERO(&exp->exp_refcount);
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 
 	CDEBUG(D_IOCTL, "destroying export %p/%s for %s\n", exp,
 	       exp->exp_client_uuid.uuid, obd->obd_name);
@@ -690,7 +689,6 @@ EXPORT_SYMBOL(class_export_get);
 
 void class_export_put(struct obd_export *exp)
 {
-	LASSERT(exp != NULL);
 	LASSERT_ATOMIC_GT_LT(&exp->exp_refcount, 0, LI_POISON);
 	CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", exp,
 	       atomic_read(&exp->exp_refcount) - 1);
@@ -942,7 +940,7 @@ EXPORT_SYMBOL(class_new_import);
 
 void class_destroy_import(struct obd_import *import)
 {
-	LASSERT(import != NULL);
+	LASSERT(import);
 	LASSERT(import != LP_POISON);
 
 	class_handle_unhash(&import->imp_handle);
@@ -962,8 +960,7 @@ void __class_export_add_lock_ref(struct obd_export *exp, struct ldlm_lock *lock)
 
 	LASSERT(lock->l_exp_refs_nr >= 0);
 
-	if (lock->l_exp_refs_target != NULL &&
-	    lock->l_exp_refs_target != exp) {
+	if (lock->l_exp_refs_target && lock->l_exp_refs_target != exp) {
 		LCONSOLE_WARN("setting export %p for lock %p which already has export %p\n",
 			      exp, lock, lock->l_exp_refs_target);
 	}
@@ -1005,9 +1002,9 @@ int class_connect(struct lustre_handle *conn, struct obd_device *obd,
 {
 	struct obd_export *export;
 
-	LASSERT(conn != NULL);
-	LASSERT(obd != NULL);
-	LASSERT(cluuid != NULL);
+	LASSERT(conn);
+	LASSERT(obd);
+	LASSERT(cluuid);
 
 	export = class_new_export(obd, cluuid);
 	if (IS_ERR(export))
@@ -1133,14 +1130,14 @@ static void obd_zombie_impexp_cull(void)
 
 		spin_unlock(&obd_zombie_impexp_lock);
 
-		if (import != NULL) {
+		if (import) {
 			class_import_destroy(import);
 			spin_lock(&obd_zombie_impexp_lock);
 			zombies_count--;
 			spin_unlock(&obd_zombie_impexp_lock);
 		}
 
-		if (export != NULL) {
+		if (export) {
 			class_export_destroy(export);
 			spin_lock(&obd_zombie_impexp_lock);
 			zombies_count--;
@@ -1148,7 +1145,7 @@ static void obd_zombie_impexp_cull(void)
 		}
 
 		cond_resched();
-	} while (import != NULL || export != NULL);
+	} while (import || export);
 }
 
 static struct completion	obd_zombie_start;
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index 1913f3e..1de3b9a 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -106,7 +106,7 @@ int obd_ioctl_getdata(char **buf, int *len, void __user *arg)
 	 * obdfilter-survey is an example, which relies on ioctl. So we'd
 	 * better avoid vmalloc on ioctl path. LU-66 */
 	*buf = libcfs_kvzalloc(hdr.ioc_len, GFP_NOFS);
-	if (*buf == NULL) {
+	if (!*buf) {
 		CERROR("Cannot allocate control buffer of len %d\n",
 		       hdr.ioc_len);
 		return -EINVAL;
@@ -454,8 +454,7 @@ out:
 
 int class_procfs_clean(void)
 {
-	if (debugfs_lustre_root != NULL)
-		debugfs_remove_recursive(debugfs_lustre_root);
+	debugfs_remove_recursive(debugfs_lustre_root);
 
 	debugfs_lustre_root = NULL;
 
diff --git a/drivers/staging/lustre/lustre/obdclass/llog.c b/drivers/staging/lustre/lustre/obdclass/llog.c
index f956d7e..9a647ba 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog.c
@@ -76,8 +76,6 @@ static struct llog_handle *llog_alloc_handle(void)
  */
 static void llog_free_handle(struct llog_handle *loghandle)
 {
-	LASSERT(loghandle != NULL);
-
 	/* failed llog_init_handle */
 	if (!loghandle->lgh_hdr)
 		goto out;
@@ -115,7 +113,7 @@ static int llog_read_header(const struct lu_env *env,
 	if (rc)
 		return rc;
 
-	if (lop->lop_read_header == NULL)
+	if (!lop->lop_read_header)
 		return -EOPNOTSUPP;
 
 	rc = lop->lop_read_header(env, handle);
@@ -144,7 +142,7 @@ int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
 	struct llog_log_hdr	*llh;
 	int			 rc;
 
-	LASSERT(handle->lgh_hdr == NULL);
+	LASSERT(!handle->lgh_hdr);
 
 	llh = kzalloc(sizeof(*llh), GFP_NOFS);
 	if (!llh)
@@ -228,11 +226,11 @@ static int llog_process_thread(void *arg)
 		return 0;
 	}
 
-	if (cd != NULL) {
+	if (cd) {
 		last_called_index = cd->lpcd_first_idx;
 		index = cd->lpcd_first_idx + 1;
 	}
-	if (cd != NULL && cd->lpcd_last_idx)
+	if (cd && cd->lpcd_last_idx)
 		last_index = cd->lpcd_last_idx;
 	else
 		last_index = LLOG_BITMAP_BYTES * 8 - 1;
@@ -328,7 +326,7 @@ repeat:
 	}
 
 out:
-	if (cd != NULL)
+	if (cd)
 		cd->lpcd_last_idx = last_called_index;
 
 	kfree(buf);
@@ -416,13 +414,13 @@ int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt,
 	LASSERT(ctxt);
 	LASSERT(ctxt->loc_logops);
 
-	if (ctxt->loc_logops->lop_open == NULL) {
+	if (!ctxt->loc_logops->lop_open) {
 		*lgh = NULL;
 		return -EOPNOTSUPP;
 	}
 
 	*lgh = llog_alloc_handle();
-	if (*lgh == NULL)
+	if (!*lgh)
 		return -ENOMEM;
 	(*lgh)->lgh_ctxt = ctxt;
 	(*lgh)->lgh_logops = ctxt->loc_logops;
@@ -449,7 +447,7 @@ int llog_close(const struct lu_env *env, struct llog_handle *loghandle)
 	rc = llog_handle2ops(loghandle, &lop);
 	if (rc)
 		goto out;
-	if (lop->lop_close == NULL) {
+	if (!lop->lop_close) {
 		rc = -EOPNOTSUPP;
 		goto out;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_cat.c b/drivers/staging/lustre/lustre/obdclass/llog_cat.c
index 0f05e9c..b88ccba 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog_cat.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog_cat.c
@@ -69,7 +69,7 @@ static int llog_cat_id2handle(const struct lu_env *env,
 	struct llog_handle	*loghandle;
 	int			 rc = 0;
 
-	if (cathandle == NULL)
+	if (!cathandle)
 		return -EBADF;
 
 	down_write(&cathandle->lgh_lock);
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_obd.c b/drivers/staging/lustre/lustre/obdclass/llog_obd.c
index 9bc5199..a06a5ea 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog_obd.c
@@ -110,11 +110,8 @@ int llog_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
 	struct obd_llog_group *olg;
 	int rc, idx;
 
-	LASSERT(ctxt != NULL);
-	LASSERT(ctxt != LP_POISON);
-
 	olg = ctxt->loc_olg;
-	LASSERT(olg != NULL);
+	LASSERT(olg);
 	LASSERT(olg != LP_POISON);
 
 	idx = ctxt->loc_idx;
@@ -151,7 +148,7 @@ int llog_setup(const struct lu_env *env, struct obd_device *obd,
 	if (index < 0 || index >= LLOG_MAX_CTXTS)
 		return -EINVAL;
 
-	LASSERT(olg != NULL);
+	LASSERT(olg);
 
 	ctxt = llog_new_ctxt(obd);
 	if (!ctxt)
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c
index 6acc4a1..4b04124 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_counters.c
@@ -48,7 +48,7 @@ void lprocfs_counter_add(struct lprocfs_stats *stats, int idx, long amount)
 	int				smp_id;
 	unsigned long			flags = 0;
 
-	if (stats == NULL)
+	if (!stats)
 		return;
 
 	LASSERTF(0 <= idx && idx < stats->ls_num,
@@ -96,7 +96,7 @@ void lprocfs_counter_sub(struct lprocfs_stats *stats, int idx, long amount)
 	int				smp_id;
 	unsigned long			flags = 0;
 
-	if (stats == NULL)
+	if (!stats)
 		return;
 
 	LASSERTF(0 <= idx && idx < stats->ls_num,
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index a7e22e0..16b1c70 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -109,7 +109,7 @@ int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 	__u64 mask = 1;
 	int i, ret = 0;
 
-	for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
+	for (i = 0; obd_connect_names[i]; i++, mask <<= 1) {
 		if (flags & mask)
 			ret += snprintf(page + ret, count - ret, "%s%s",
 					ret ? sep : "", obd_connect_names[i]);
@@ -199,7 +199,7 @@ int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
 	if (pbuf == end)
 		return -EINVAL;
 
-	if (end != NULL && *end == '.') {
+	if (end && *end == '.') {
 		int temp_val, pow = 1;
 		int i;
 
@@ -247,7 +247,7 @@ struct dentry *ldebugfs_add_simple(struct dentry *root,
 	struct dentry *entry;
 	umode_t mode = 0;
 
-	if (root == NULL || name == NULL || fops == NULL)
+	if (!root || !name || !fops)
 		return ERR_PTR(-EINVAL);
 
 	if (fops->read)
@@ -272,7 +272,7 @@ int ldebugfs_add_vars(struct dentry *parent,
 	if (IS_ERR_OR_NULL(parent) || IS_ERR_OR_NULL(list))
 		return -EINVAL;
 
-	while (list->name != NULL) {
+	while (list->name) {
 		struct dentry *entry;
 		umode_t mode = 0;
 
@@ -491,7 +491,7 @@ int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
 	char *imp_state_name = NULL;
 	int rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -514,7 +514,7 @@ int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
 	struct ptlrpc_connection *conn;
 	int rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 
 	rc = lprocfs_climp_check(obd);
 	if (rc)
@@ -543,7 +543,7 @@ void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 
 	memset(cnt, 0, sizeof(*cnt));
 
-	if (stats == NULL) {
+	if (!stats) {
 		/* set count to 1 to avoid divide-by-zero errs in callers */
 		cnt->lc_count = 1;
 		return;
@@ -554,7 +554,7 @@ void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 	num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 
 	for (i = 0; i < num_entry; i++) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
 
@@ -604,7 +604,7 @@ static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep
 	int i;
 	bool first = true;
 
-	for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
+	for (i = 0; obd_connect_names[i]; i++, mask <<= 1) {
 		if (flags & mask) {
 			seq_printf(m, "%s%s",
 					first ? sep : "", obd_connect_names[i]);
@@ -629,7 +629,7 @@ int lprocfs_rd_import(struct seq_file *m, void *data)
 	int				rw	= 0;
 	int				rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -665,7 +665,7 @@ int lprocfs_rd_import(struct seq_file *m, void *data)
 		seq_printf(m, "%s%s", j ? ", " : "", nidstr);
 		j++;
 	}
-	if (imp->imp_connection != NULL)
+	if (imp->imp_connection)
 		libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
 				 nidstr, sizeof(nidstr));
 	else
@@ -682,7 +682,7 @@ int lprocfs_rd_import(struct seq_file *m, void *data)
 		      atomic_read(&imp->imp_inval_count));
 	spin_unlock(&imp->imp_lock);
 
-	if (obd->obd_svc_stats == NULL)
+	if (!obd->obd_svc_stats)
 		goto out_climp;
 
 	header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
@@ -779,7 +779,7 @@ int lprocfs_rd_state(struct seq_file *m, void *data)
 	struct obd_import *imp;
 	int j, k, rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -825,7 +825,7 @@ int lprocfs_rd_timeouts(struct seq_file *m, void *data)
 	struct dhms ts;
 	int i, rc;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = lprocfs_climp_check(obd);
 	if (rc)
 		return rc;
@@ -967,12 +967,12 @@ int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
 	unsigned long           flags = 0;
 	int                     i;
 
-	LASSERT(stats->ls_percpu[cpuid] == NULL);
+	LASSERT(!stats->ls_percpu[cpuid]);
 	LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
 
 	percpusize = lprocfs_stats_counter_size(stats);
 	LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
-	if (stats->ls_percpu[cpuid] != NULL) {
+	if (stats->ls_percpu[cpuid]) {
 		rc = 0;
 		if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
 			if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
@@ -1017,7 +1017,7 @@ struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
 
 	/* alloc percpu pointers for all possible cpu slots */
 	LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
-	if (stats == NULL)
+	if (!stats)
 		return NULL;
 
 	stats->ls_num = num;
@@ -1027,14 +1027,14 @@ struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
 	/* alloc num of counter headers */
 	LIBCFS_ALLOC(stats->ls_cnt_header,
 		     stats->ls_num * sizeof(struct lprocfs_counter_header));
-	if (stats->ls_cnt_header == NULL)
+	if (!stats->ls_cnt_header)
 		goto fail;
 
 	if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
 		/* contains only one set counters */
 		percpusize = lprocfs_stats_counter_size(stats);
 		LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
-		if (stats->ls_percpu[0] == NULL)
+		if (!stats->ls_percpu[0])
 			goto fail;
 		stats->ls_biggest_alloc_num = 1;
 	} else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
@@ -1059,7 +1059,7 @@ void lprocfs_free_stats(struct lprocfs_stats **statsh)
 	unsigned int percpusize;
 	unsigned int i;
 
-	if (stats == NULL || stats->ls_num == 0)
+	if (!stats || stats->ls_num == 0)
 		return;
 	*statsh = NULL;
 
@@ -1070,9 +1070,9 @@ void lprocfs_free_stats(struct lprocfs_stats **statsh)
 
 	percpusize = lprocfs_stats_counter_size(stats);
 	for (i = 0; i < num_entry; i++)
-		if (stats->ls_percpu[i] != NULL)
+		if (stats->ls_percpu[i])
 			LIBCFS_FREE(stats->ls_percpu[i], percpusize);
-	if (stats->ls_cnt_header != NULL)
+	if (stats->ls_cnt_header)
 		LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
 					sizeof(struct lprocfs_counter_header));
 	LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
@@ -1090,7 +1090,7 @@ void lprocfs_clear_stats(struct lprocfs_stats *stats)
 	num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 
 	for (i = 0; i < num_entry; i++) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		for (j = 0; j < stats->ls_num; j++) {
 			percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
@@ -1230,10 +1230,8 @@ void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
 	unsigned int			i;
 	unsigned int			num_cpu;
 
-	LASSERT(stats != NULL);
-
 	header = &stats->ls_cnt_header[index];
-	LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
+	LASSERTF(header, "Failed to allocate stats header:[%d]%s/%s\n",
 		 index, name, units);
 
 	header->lc_config = conf;
@@ -1242,7 +1240,7 @@ void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
 
 	num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
 	for (i = 0; i < num_cpu; ++i) {
-		if (stats->ls_percpu[i] == NULL)
+		if (!stats->ls_percpu[i])
 			continue;
 		percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
 		percpu_cntr->lc_count		= 0;
@@ -1270,7 +1268,7 @@ __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
 {
 	__s64 ret = 0;
 
-	if (lc == NULL || header == NULL)
+	if (!lc || !header)
 		return 0;
 
 	switch (field) {
@@ -1412,7 +1410,7 @@ char *lprocfs_find_named_value(const char *buffer, const char *name,
 
 	/* there is no strnstr() in rhel5 and ubuntu kernels */
 	val = lprocfs_strnstr(buffer, name, buflen);
-	if (val == NULL)
+	if (!val)
 		return (char *)buffer;
 
 	val += strlen(name);			     /* skip prefix */
diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c b/drivers/staging/lustre/lustre/obdclass/lu_object.c
index ce248f4..15ffbbf 100644
--- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
@@ -86,13 +86,12 @@ void lu_object_put(const struct lu_env *env, struct lu_object *o)
 	 */
 	fid = lu_object_fid(o);
 	if (fid_is_zero(fid)) {
-		LASSERT(top->loh_hash.next == NULL
-			&& top->loh_hash.pprev == NULL);
+		LASSERT(!top->loh_hash.next && !top->loh_hash.pprev);
 		LASSERT(list_empty(&top->loh_lru));
 		if (!atomic_dec_and_test(&top->loh_ref))
 			return;
 		list_for_each_entry_reverse(o, &top->loh_layers, lo_linkage) {
-			if (o->lo_ops->loo_object_release != NULL)
+			if (o->lo_ops->loo_object_release)
 				o->lo_ops->loo_object_release(env, o);
 		}
 		lu_object_free(env, orig);
@@ -119,7 +118,7 @@ void lu_object_put(const struct lu_env *env, struct lu_object *o)
 	 * layers, and notify them that object is no longer busy.
 	 */
 	list_for_each_entry_reverse(o, &top->loh_layers, lo_linkage) {
-		if (o->lo_ops->loo_object_release != NULL)
+		if (o->lo_ops->loo_object_release)
 			o->lo_ops->loo_object_release(env, o);
 	}
 
@@ -210,7 +209,7 @@ static struct lu_object *lu_object_alloc(const struct lu_env *env,
 	 * lu_object_header.
 	 */
 	top = dev->ld_ops->ldo_object_alloc(env, NULL, dev);
-	if (top == NULL)
+	if (!top)
 		return ERR_PTR(-ENOMEM);
 	if (IS_ERR(top))
 		return top;
@@ -245,7 +244,7 @@ next:
 	} while (!clean);
 
 	list_for_each_entry_reverse(scan, layers, lo_linkage) {
-		if (scan->lo_ops->loo_object_start != NULL) {
+		if (scan->lo_ops->loo_object_start) {
 			result = scan->lo_ops->loo_object_start(env, scan);
 			if (result != 0) {
 				lu_object_free(env, top);
@@ -276,7 +275,7 @@ static void lu_object_free(const struct lu_env *env, struct lu_object *o)
 	 * First call ->loo_object_delete() method to release all resources.
 	 */
 	list_for_each_entry_reverse(scan, layers, lo_linkage) {
-		if (scan->lo_ops->loo_object_delete != NULL)
+		if (scan->lo_ops->loo_object_delete)
 			scan->lo_ops->loo_object_delete(env, scan);
 	}
 
@@ -296,7 +295,6 @@ static void lu_object_free(const struct lu_env *env, struct lu_object *o)
 		 */
 		o = container_of0(splice.prev, struct lu_object, lo_linkage);
 		list_del_init(&o->lo_linkage);
-		LASSERT(o->lo_ops->loo_object_free != NULL);
 		o->lo_ops->loo_object_free(env, o);
 	}
 
@@ -451,7 +449,6 @@ int lu_cdebug_printer(const struct lu_env *env,
 	va_start(args, format);
 
 	key = lu_context_key_get(&env->le_ctx, &lu_global_key);
-	LASSERT(key != NULL);
 
 	used = strlen(key->lck_area);
 	complete = format[strlen(format) - 1] == '\n';
@@ -508,7 +505,7 @@ void lu_object_print(const struct lu_env *env, void *cookie,
 		(*printer)(env, cookie, "%*.*s%s@%p", depth, depth, ruler,
 			   o->lo_dev->ld_type->ldt_name, o);
 
-		if (o->lo_ops->loo_object_print != NULL)
+		if (o->lo_ops->loo_object_print)
 			(*o->lo_ops->loo_object_print)(env, cookie, printer, o);
 
 		(*printer)(env, cookie, "\n");
@@ -537,7 +534,7 @@ static struct lu_object *htable_lookup(struct lu_site *s,
 	/* cfs_hash_bd_peek_locked is a somehow "internal" function
 	 * of cfs_hash, it doesn't add refcount on object. */
 	hnode = cfs_hash_bd_peek_locked(s->ls_obj_hash, bd, (void *)f);
-	if (hnode == NULL) {
+	if (!hnode) {
 		lprocfs_counter_incr(s->ls_stats, LU_SS_CACHE_MISS);
 		return ERR_PTR(-ENOENT);
 	}
@@ -636,7 +633,7 @@ static struct lu_object *lu_object_find_try(const struct lu_env *env,
 	 * If dying object is found during index search, add @waiter to the
 	 * site wait-queue and return ERR_PTR(-EAGAIN).
 	 */
-	if (conf != NULL && conf->loc_flags & LOC_F_NEW)
+	if (conf && conf->loc_flags & LOC_F_NEW)
 		return lu_object_new(env, dev, f, conf);
 
 	s  = dev->ld_site;
@@ -715,7 +712,7 @@ struct lu_object *lu_object_find_slice(const struct lu_env *env,
 	top = lu_object_find(env, dev, f, conf);
 	if (!IS_ERR(top)) {
 		obj = lu_object_locate(top->lo_header, dev->ld_type);
-		if (obj == NULL)
+		if (!obj)
 			lu_object_put(env, top);
 	} else
 		obj = top;
@@ -966,11 +963,11 @@ int lu_site_init(struct lu_site *s, struct lu_device *top)
 						 CFS_HASH_NO_ITEMREF |
 						 CFS_HASH_DEPTH |
 						 CFS_HASH_ASSERT_EMPTY);
-		if (s->ls_obj_hash != NULL)
+		if (s->ls_obj_hash)
 			break;
 	}
 
-	if (s->ls_obj_hash == NULL) {
+	if (!s->ls_obj_hash) {
 		CERROR("failed to create lu_site hash with bits: %d\n", bits);
 		return -ENOMEM;
 	}
@@ -982,7 +979,7 @@ int lu_site_init(struct lu_site *s, struct lu_device *top)
 	}
 
 	s->ls_stats = lprocfs_alloc_stats(LU_SS_LAST_STAT, 0);
-	if (s->ls_stats == NULL) {
+	if (!s->ls_stats) {
 		cfs_hash_putref(s->ls_obj_hash);
 		s->ls_obj_hash = NULL;
 		return -ENOMEM;
@@ -1031,19 +1028,19 @@ void lu_site_fini(struct lu_site *s)
 	list_del_init(&s->ls_linkage);
 	mutex_unlock(&lu_sites_guard);
 
-	if (s->ls_obj_hash != NULL) {
+	if (s->ls_obj_hash) {
 		cfs_hash_putref(s->ls_obj_hash);
 		s->ls_obj_hash = NULL;
 	}
 
-	if (s->ls_top_dev != NULL) {
+	if (s->ls_top_dev) {
 		s->ls_top_dev->ld_site = NULL;
 		lu_ref_del(&s->ls_top_dev->ld_reference, "site-top", s);
 		lu_device_put(s->ls_top_dev);
 		s->ls_top_dev = NULL;
 	}
 
-	if (s->ls_stats != NULL)
+	if (s->ls_stats)
 		lprocfs_free_stats(&s->ls_stats);
 }
 EXPORT_SYMBOL(lu_site_fini);
@@ -1088,7 +1085,7 @@ EXPORT_SYMBOL(lu_device_put);
  */
 int lu_device_init(struct lu_device *d, struct lu_device_type *t)
 {
-	if (t->ldt_device_nr++ == 0 && t->ldt_ops->ldto_start != NULL)
+	if (t->ldt_device_nr++ == 0 && t->ldt_ops->ldto_start)
 		t->ldt_ops->ldto_start(t);
 	memset(d, 0, sizeof(*d));
 	atomic_set(&d->ld_ref, 0);
@@ -1107,7 +1104,7 @@ void lu_device_fini(struct lu_device *d)
 	struct lu_device_type *t;
 
 	t = d->ld_type;
-	if (d->ld_obd != NULL) {
+	if (d->ld_obd) {
 		d->ld_obd->obd_lu_dev = NULL;
 		d->ld_obd = NULL;
 	}
@@ -1116,7 +1113,7 @@ void lu_device_fini(struct lu_device *d)
 	LASSERTF(atomic_read(&d->ld_ref) == 0,
 		 "Refcount is %u\n", atomic_read(&d->ld_ref));
 	LASSERT(t->ldt_device_nr > 0);
-	if (--t->ldt_device_nr == 0 && t->ldt_ops->ldto_stop != NULL)
+	if (--t->ldt_device_nr == 0 && t->ldt_ops->ldto_stop)
 		t->ldt_ops->ldto_stop(t);
 }
 EXPORT_SYMBOL(lu_device_fini);
@@ -1148,7 +1145,7 @@ void lu_object_fini(struct lu_object *o)
 
 	LASSERT(list_empty(&o->lo_linkage));
 
-	if (dev != NULL) {
+	if (dev) {
 		lu_ref_del_at(&dev->ld_reference, &o->lo_dev_ref,
 			      "lu_object", o);
 		lu_device_put(dev);
@@ -1239,7 +1236,7 @@ void lu_stack_fini(const struct lu_env *env, struct lu_device *top)
 	struct lu_device *next;
 
 	lu_site_purge(env, site, ~0);
-	for (scan = top; scan != NULL; scan = next) {
+	for (scan = top; scan; scan = next) {
 		next = scan->ld_type->ldt_ops->ldto_device_fini(env, scan);
 		lu_ref_del(&scan->ld_reference, "lu-stack", &lu_site_init);
 		lu_device_put(scan);
@@ -1248,13 +1245,13 @@ void lu_stack_fini(const struct lu_env *env, struct lu_device *top)
 	/* purge again. */
 	lu_site_purge(env, site, ~0);
 
-	for (scan = top; scan != NULL; scan = next) {
+	for (scan = top; scan; scan = next) {
 		const struct lu_device_type *ldt = scan->ld_type;
 		struct obd_type	     *type;
 
 		next = ldt->ldt_ops->ldto_device_free(env, scan);
 		type = ldt->ldt_obd_type;
-		if (type != NULL) {
+		if (type) {
 			type->typ_refcnt--;
 			class_put_type(type);
 		}
@@ -1289,14 +1286,14 @@ int lu_context_key_register(struct lu_context_key *key)
 	int result;
 	int i;
 
-	LASSERT(key->lct_init != NULL);
-	LASSERT(key->lct_fini != NULL);
+	LASSERT(key->lct_init);
+	LASSERT(key->lct_fini);
 	LASSERT(key->lct_tags != 0);
 
 	result = -ENFILE;
 	spin_lock(&lu_keys_guard);
 	for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
-		if (lu_keys[i] == NULL) {
+		if (!lu_keys[i]) {
 			key->lct_index = i;
 			atomic_set(&key->lct_used, 1);
 			lu_keys[i] = key;
@@ -1313,12 +1310,10 @@ EXPORT_SYMBOL(lu_context_key_register);
 
 static void key_fini(struct lu_context *ctx, int index)
 {
-	if (ctx->lc_value != NULL && ctx->lc_value[index] != NULL) {
+	if (ctx->lc_value && ctx->lc_value[index]) {
 		struct lu_context_key *key;
 
 		key = lu_keys[index];
-		LASSERT(key != NULL);
-		LASSERT(key->lct_fini != NULL);
 		LASSERT(atomic_read(&key->lct_used) > 1);
 
 		key->lct_fini(ctx, key, ctx->lc_value[index]);
@@ -1376,7 +1371,7 @@ int lu_context_key_register_many(struct lu_context_key *k, ...)
 		if (result)
 			break;
 		key = va_arg(args, struct lu_context_key *);
-	} while (key != NULL);
+	} while (key);
 	va_end(args);
 
 	if (result != 0) {
@@ -1404,7 +1399,7 @@ void lu_context_key_degister_many(struct lu_context_key *k, ...)
 	do {
 		lu_context_key_degister(k);
 		k = va_arg(args, struct lu_context_key*);
-	} while (k != NULL);
+	} while (k);
 	va_end(args);
 }
 EXPORT_SYMBOL(lu_context_key_degister_many);
@@ -1420,7 +1415,7 @@ void lu_context_key_revive_many(struct lu_context_key *k, ...)
 	do {
 		lu_context_key_revive(k);
 		k = va_arg(args, struct lu_context_key*);
-	} while (k != NULL);
+	} while (k);
 	va_end(args);
 }
 EXPORT_SYMBOL(lu_context_key_revive_many);
@@ -1436,7 +1431,7 @@ void lu_context_key_quiesce_many(struct lu_context_key *k, ...)
 	do {
 		lu_context_key_quiesce(k);
 		k = va_arg(args, struct lu_context_key*);
-	} while (k != NULL);
+	} while (k);
 	va_end(args);
 }
 EXPORT_SYMBOL(lu_context_key_quiesce_many);
@@ -1497,7 +1492,7 @@ static void keys_fini(struct lu_context *ctx)
 {
 	int	i;
 
-	if (ctx->lc_value == NULL)
+	if (!ctx->lc_value)
 		return;
 
 	for (i = 0; i < ARRAY_SIZE(lu_keys); ++i)
@@ -1511,12 +1506,12 @@ static int keys_fill(struct lu_context *ctx)
 {
 	int i;
 
-	LINVRNT(ctx->lc_value != NULL);
+	LINVRNT(ctx->lc_value);
 	for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
 		struct lu_context_key *key;
 
 		key = lu_keys[i];
-		if (ctx->lc_value[i] == NULL && key != NULL &&
+		if (!ctx->lc_value[i] && key &&
 		    (key->lct_tags & ctx->lc_tags) &&
 		    /*
 		     * Don't create values for a LCT_QUIESCENT key, as this
@@ -1525,7 +1520,7 @@ static int keys_fill(struct lu_context *ctx)
 		    !(key->lct_tags & LCT_QUIESCENT)) {
 			void *value;
 
-			LINVRNT(key->lct_init != NULL);
+			LINVRNT(key->lct_init);
 			LINVRNT(key->lct_index == i);
 
 			value = key->lct_init(ctx, key);
@@ -1542,7 +1537,7 @@ static int keys_fill(struct lu_context *ctx)
 			 * value.
 			 */
 			ctx->lc_value[i] = value;
-			if (key->lct_exit != NULL)
+			if (key->lct_exit)
 				ctx->lc_tags |= LCT_HAS_EXIT;
 		}
 		ctx->lc_version = key_set_version;
@@ -1554,7 +1549,7 @@ static int keys_init(struct lu_context *ctx)
 {
 	ctx->lc_value = kcalloc(ARRAY_SIZE(lu_keys), sizeof(ctx->lc_value[0]),
 				GFP_NOFS);
-	if (likely(ctx->lc_value != NULL))
+	if (likely(ctx->lc_value))
 		return keys_fill(ctx);
 
 	return -ENOMEM;
@@ -1626,14 +1621,13 @@ void lu_context_exit(struct lu_context *ctx)
 
 	LINVRNT(ctx->lc_state == LCS_ENTERED);
 	ctx->lc_state = LCS_LEFT;
-	if (ctx->lc_tags & LCT_HAS_EXIT && ctx->lc_value != NULL) {
+	if (ctx->lc_tags & LCT_HAS_EXIT && ctx->lc_value) {
 		for (i = 0; i < ARRAY_SIZE(lu_keys); ++i) {
-			if (ctx->lc_value[i] != NULL) {
+			if (ctx->lc_value[i]) {
 				struct lu_context_key *key;
 
 				key = lu_keys[i];
-				LASSERT(key != NULL);
-				if (key->lct_exit != NULL)
+				if (key->lct_exit)
 					key->lct_exit(ctx,
 						      key, ctx->lc_value[i]);
 			}
@@ -1688,7 +1682,7 @@ int lu_env_refill(struct lu_env *env)
 	int result;
 
 	result = lu_context_refill(&env->le_ctx);
-	if (result == 0 && env->le_ses != NULL)
+	if (result == 0 && env->le_ses)
 		result = lu_context_refill(env->le_ses);
 	return result;
 }
@@ -1922,11 +1916,11 @@ int lu_kmem_init(struct lu_kmem_descr *caches)
 	int result;
 	struct lu_kmem_descr *iter = caches;
 
-	for (result = 0; iter->ckd_cache != NULL; ++iter) {
+	for (result = 0; iter->ckd_cache; ++iter) {
 		*iter->ckd_cache = kmem_cache_create(iter->ckd_name,
 							iter->ckd_size,
 							0, 0, NULL);
-		if (*iter->ckd_cache == NULL) {
+		if (!*iter->ckd_cache) {
 			result = -ENOMEM;
 			/* free all previously allocated caches */
 			lu_kmem_fini(caches);
@@ -1943,7 +1937,7 @@ EXPORT_SYMBOL(lu_kmem_init);
  */
 void lu_kmem_fini(struct lu_kmem_descr *caches)
 {
-	for (; caches->ckd_cache != NULL; ++caches) {
+	for (; caches->ckd_cache; ++caches) {
 		kmem_cache_destroy(*caches->ckd_cache);
 		*caches->ckd_cache = NULL;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/lustre_handles.c b/drivers/staging/lustre/lustre/obdclass/lustre_handles.c
index fb9147c..2bbbc9f 100644
--- a/drivers/staging/lustre/lustre/obdclass/lustre_handles.c
+++ b/drivers/staging/lustre/lustre/obdclass/lustre_handles.c
@@ -65,7 +65,7 @@ void class_handle_hash(struct portals_handle *h,
 {
 	struct handle_bucket *bucket;
 
-	LASSERT(h != NULL);
+	LASSERT(h);
 	LASSERT(list_empty(&h->h_link));
 
 	/*
@@ -140,7 +140,7 @@ void *class_handle2object(__u64 cookie)
 	struct portals_handle *h;
 	void *retval = NULL;
 
-	LASSERT(handle_hash != NULL);
+	LASSERT(handle_hash);
 
 	/* Be careful when you want to change this code. See the
 	 * rcu_read_lock() definition on top this file. - jxiong */
@@ -170,7 +170,7 @@ void class_handle_free_cb(struct rcu_head *rcu)
 	struct portals_handle *h = RCU2HANDLE(rcu);
 	void *ptr = (void *)(unsigned long)h->h_cookie;
 
-	if (h->h_ops->hop_free != NULL)
+	if (h->h_ops->hop_free)
 		h->h_ops->hop_free(ptr, h->h_size);
 	else
 		kfree(ptr);
@@ -183,11 +183,11 @@ int class_handle_init(void)
 	struct timespec64 ts;
 	int seed[2];
 
-	LASSERT(handle_hash == NULL);
+	LASSERT(!handle_hash);
 
 	handle_hash = libcfs_kvzalloc(sizeof(*bucket) * HANDLE_HASH_SIZE,
 				      GFP_NOFS);
-	if (handle_hash == NULL)
+	if (!handle_hash)
 		return -ENOMEM;
 
 	spin_lock_init(&handle_base_lock);
@@ -234,7 +234,7 @@ void class_handle_cleanup(void)
 {
 	int count;
 
-	LASSERT(handle_hash != NULL);
+	LASSERT(handle_hash);
 
 	count = cleanup_all_handles();
 
diff --git a/drivers/staging/lustre/lustre/obdclass/lustre_peer.c b/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
index d6184f8..e90041b 100644
--- a/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
+++ b/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
@@ -151,7 +151,7 @@ int class_del_uuid(const char *uuid)
 	struct uuid_nid_data *data;
 
 	spin_lock(&g_uuid_lock);
-	if (uuid != NULL) {
+	if (uuid) {
 		struct obd_uuid tmp;
 
 		obd_str2uuid(&tmp, uuid);
@@ -165,7 +165,7 @@ int class_del_uuid(const char *uuid)
 		list_splice_init(&g_uuid_list, &deathrow);
 	spin_unlock(&g_uuid_lock);
 
-	if (uuid != NULL && list_empty(&deathrow)) {
+	if (uuid && list_empty(&deathrow)) {
 		CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
 		return -EINVAL;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_config.c b/drivers/staging/lustre/lustre/obdclass/obd_config.c
index 49cdc64..c4128ac 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_config.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_config.c
@@ -210,7 +210,7 @@ static int class_attach(struct lustre_cfg *lcfg)
 		       name, typename, rc);
 		goto out;
 	}
-	LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
+	LASSERTF(obd, "Cannot get obd device %s of type %s\n",
 		 name, typename);
 	LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 		 "obd %p obd_magic %08X != %08X\n",
@@ -272,9 +272,9 @@ static int class_attach(struct lustre_cfg *lcfg)
 	       obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 	return 0;
  out:
-	if (obd != NULL) {
+	if (obd)
 		class_release_dev(obd);
-	}
+
 	return rc;
 }
 
@@ -286,7 +286,7 @@ static int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 	int err = 0;
 	struct obd_export *exp;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	LASSERTF(obd == class_num2obd(obd->obd_minor),
 		 "obd %p != obd_devs[%d] %p\n",
 		 obd, obd->obd_minor, class_num2obd(obd->obd_minor));
@@ -1183,7 +1183,7 @@ int class_config_llog_handler(const struct lu_env *env,
 
 		/* we override the llog's uuid for clients, to insure they
 		are unique */
-		if (clli && clli->cfg_instance != NULL &&
+		if (clli && clli->cfg_instance &&
 		    lcfg->lcfg_command == LCFG_ATTACH) {
 			lustre_cfg_bufs_set_string(&bufs, 2,
 						   clli->cfg_uuid.uuid);
@@ -1270,7 +1270,7 @@ int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
 	if (cfg) {
 		cd.lpcd_first_idx = cfg->cfg_last_idx;
 		callback = cfg->cfg_callback;
-		LASSERT(callback != NULL);
+		LASSERT(callback);
 	} else {
 		callback = class_config_llog_handler;
 	}
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
index b5aa816..9618cc2 100644
--- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c
+++ b/drivers/staging/lustre/lustre/obdclass/obd_mount.c
@@ -518,13 +518,12 @@ static int lustre_free_lsi(struct super_block *sb)
 {
 	struct lustre_sb_info *lsi = s2lsi(sb);
 
-	LASSERT(lsi != NULL);
 	CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
 
 	/* someone didn't call server_put_mount. */
 	LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
 
-	if (lsi->lsi_lmd != NULL) {
+	if (lsi->lsi_lmd) {
 		kfree(lsi->lsi_lmd->lmd_dev);
 		kfree(lsi->lsi_lmd->lmd_profile);
 		kfree(lsi->lsi_lmd->lmd_mgssec);
@@ -538,7 +537,7 @@ static int lustre_free_lsi(struct super_block *sb)
 		kfree(lsi->lsi_lmd);
 	}
 
-	LASSERT(lsi->lsi_llsbi == NULL);
+	LASSERT(!lsi->lsi_llsbi);
 	kfree(lsi);
 	s2lsi_nocast(sb) = NULL;
 
@@ -551,8 +550,6 @@ static int lustre_put_lsi(struct super_block *sb)
 {
 	struct lustre_sb_info *lsi = s2lsi(sb);
 
-	LASSERT(lsi != NULL);
-
 	CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
 	if (atomic_dec_and_test(&lsi->lsi_mounts)) {
 		lustre_free_lsi(sb);
@@ -588,12 +585,12 @@ static int server_name2fsname(const char *svname, char *fsname,
 	if (dash == svname)
 		return -EINVAL;
 
-	if (fsname != NULL) {
+	if (fsname) {
 		strncpy(fsname, svname, dash - svname);
 		fsname[dash - svname] = '\0';
 	}
 
-	if (endptr != NULL)
+	if (endptr)
 		*endptr = dash;
 
 	return 0;
@@ -627,18 +624,18 @@ static int server_name2index(const char *svname, __u32 *idx,
 	dash += 3;
 
 	if (strncmp(dash, "all", 3) == 0) {
-		if (endptr != NULL)
+		if (endptr)
 			*endptr = dash + 3;
 		return rc | LDD_F_SV_ALL;
 	}
 
 	index = simple_strtoul(dash, (char **)endptr, 16);
-	if (idx != NULL)
+	if (idx)
 		*idx = index;
 
 	/* Account for -mdc after index that is possible when specifying mdt */
-	if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
-				      sizeof(LUSTRE_MDC_NAME)-1) == 0)
+	if (endptr && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
+			      sizeof(LUSTRE_MDC_NAME) - 1) == 0)
 		*endptr += sizeof(LUSTRE_MDC_NAME);
 
 	return rc;
@@ -788,7 +785,7 @@ static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
 	lmd->lmd_mgssec = NULL;
 
 	tail = strchr(ptr, ',');
-	if (tail == NULL)
+	if (!tail)
 		length = strlen(ptr);
 	else
 		length = tail - ptr;
@@ -807,14 +804,14 @@ static int lmd_parse_string(char **handle, char *ptr)
 	char   *tail;
 	int     length;
 
-	if ((handle == NULL) || (ptr == NULL))
+	if (!handle || !ptr)
 		return -EINVAL;
 
 	kfree(*handle);
 	*handle = NULL;
 
 	tail = strchr(ptr, ',');
-	if (tail == NULL)
+	if (!tail)
 		length = strlen(ptr);
 	else
 		length = tail - ptr;
@@ -847,14 +844,14 @@ static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
 		return -EINVAL;
 	}
 
-	if (lmd->lmd_mgs != NULL)
+	if (lmd->lmd_mgs)
 		oldlen = strlen(lmd->lmd_mgs) + 1;
 
 	mgsnid = kzalloc(oldlen + length + 1, GFP_NOFS);
 	if (!mgsnid)
 		return -ENOMEM;
 
-	if (lmd->lmd_mgs != NULL) {
+	if (lmd->lmd_mgs) {
 		/* Multiple mgsnid= are taken to mean failover locations */
 		memcpy(mgsnid, lmd->lmd_mgs, oldlen);
 		mgsnid[oldlen - 1] = ':';
@@ -981,7 +978,7 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
 			size_t length, params_length;
 			char *tail = strchr(s1 + 6, ',');
 
-			if (tail == NULL)
+			if (!tail)
 				length = strlen(s1);
 			else
 				length = tail - s1;
@@ -1011,7 +1008,7 @@ static int lmd_parse(char *options, struct lustre_mount_data *lmd)
 
 		/* Find next opt */
 		s2 = strchr(s1, ',');
-		if (s2 == NULL) {
+		if (!s2) {
 			if (clear)
 				*s1 = '\0';
 			break;
@@ -1113,9 +1110,9 @@ static int lustre_fill_super(struct super_block *sb, void *data, int silent)
 
 	if (lmd_is_client(lmd)) {
 		CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
-		if (client_fill_super == NULL)
+		if (!client_fill_super)
 			request_module("lustre");
-		if (client_fill_super == NULL) {
+		if (!client_fill_super) {
 			LCONSOLE_ERROR_MSG(0x165, "Nothing registered for client mount! Is the 'lustre' module loaded?\n");
 			lustre_put_lsi(sb);
 			rc = -ENODEV;
-- 
2.1.0

[PATCH 24/45] staging/lustre/obdecho: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 .../staging/lustre/lustre/obdecho/echo_client.c    | 61 ++++++++++------------
 1 file changed, 29 insertions(+), 32 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdecho/echo_client.c b/drivers/staging/lustre/lustre/obdecho/echo_client.c
index 4ca82af..ca87cc2 100644
--- a/drivers/staging/lustre/lustre/obdecho/echo_client.c
+++ b/drivers/staging/lustre/lustre/obdecho/echo_client.c
@@ -146,7 +146,7 @@ static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
 	struct echo_thread_info *info;
 
 	info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -267,7 +267,7 @@ static void echo_page_completion(const struct lu_env *env,
 				 const struct cl_page_slice *slice,
 				 int ioret)
 {
-	LASSERT(slice->cpl_page->cp_sync_io != NULL);
+	LASSERT(slice->cpl_page->cp_sync_io);
 }
 
 static void echo_page_fini(const struct lu_env *env,
@@ -393,13 +393,13 @@ static int echo_lock_init(const struct lu_env *env,
 	struct echo_lock *el;
 
 	el = kmem_cache_alloc(echo_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (el != NULL) {
+	if (el) {
 		cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops);
 		el->el_object = cl2echo_obj(obj);
 		INIT_LIST_HEAD(&el->el_chain);
 		atomic_set(&el->el_refcount, 0);
 	}
-	return el == NULL ? -ENOMEM : 0;
+	return !el ? -ENOMEM : 0;
 }
 
 static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
@@ -439,7 +439,7 @@ static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
 		under = ed->ed_next;
 		below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
 							under);
-		if (below == NULL)
+		if (!below)
 			return -ENOMEM;
 		lu_object_add(obj, below);
 	}
@@ -470,12 +470,12 @@ static int echo_alloc_memmd(struct echo_device *ed,
 	int lsm_size;
 
 	/* If export is lov/osc then use their obd method */
-	if (ed->ed_next != NULL)
+	if (ed->ed_next)
 		return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp);
 	/* OFD has no unpackmd method, do everything here */
 	lsm_size = lov_stripe_md_size(1);
 
-	LASSERT(*lsmp == NULL);
+	LASSERT(!*lsmp);
 	*lsmp = kzalloc(lsm_size, GFP_NOFS);
 	if (!*lsmp)
 		return -ENOMEM;
@@ -498,12 +498,11 @@ static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp)
 	int lsm_size;
 
 	/* If export is lov/osc then use their obd method */
-	if (ed->ed_next != NULL)
+	if (ed->ed_next)
 		return obd_free_memmd(ed->ed_ec->ec_exp, lsmp);
 	/* OFD has no unpackmd method, do everything here */
 	lsm_size = lov_stripe_md_size(1);
 
-	LASSERT(*lsmp != NULL);
 	kfree((*lsmp)->lsm_oinfo[0]);
 	kfree(*lsmp);
 	*lsmp = NULL;
@@ -562,9 +561,9 @@ static struct lu_object *echo_object_alloc(const struct lu_env *env,
 	struct lu_object *obj = NULL;
 
 	/* we're the top dev. */
-	LASSERT(hdr == NULL);
+	LASSERT(!hdr);
 	eco = kmem_cache_alloc(echo_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (eco != NULL) {
+	if (eco) {
 		struct cl_object_header *hdr = &eco->eo_hdr;
 
 		obj = &echo_obj2cl(eco)->co_lu;
@@ -627,7 +626,7 @@ static void *echo_thread_key_init(const struct lu_context *ctx,
 	struct echo_thread_info *info;
 
 	info = kmem_cache_alloc(echo_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -658,7 +657,7 @@ static void *echo_session_key_init(const struct lu_context *ctx,
 	struct echo_session_info *session;
 
 	session = kmem_cache_alloc(echo_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (session == NULL)
+	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;
 }
@@ -715,11 +714,11 @@ static struct lu_device *echo_device_alloc(const struct lu_env *env,
 
 	cleanup = 2;
 	obd = class_name2obd(lustre_cfg_string(cfg, 0));
-	LASSERT(obd != NULL);
-	LASSERT(env != NULL);
+	LASSERT(obd);
+	LASSERT(env);
 
 	tgt = class_name2obd(lustre_cfg_string(cfg, 1));
-	if (tgt == NULL) {
+	if (!tgt) {
 		CERROR("Can not find tgt device %s\n",
 			lustre_cfg_string(cfg, 1));
 		rc = -ENODEV;
@@ -748,13 +747,12 @@ static struct lu_device *echo_device_alloc(const struct lu_env *env,
 
 	/* if echo client is to be stacked upon ost device, the next is
 	 * NULL since ost is not a clio device so far */
-	if (next != NULL && !lu_device_is_cl(next))
+	if (next && !lu_device_is_cl(next))
 		next = NULL;
 
 	tgt_type_name = tgt->obd_type->typ_name;
-	if (next != NULL) {
-		LASSERT(next != NULL);
-		if (next->ld_site != NULL) {
+	if (next) {
+		if (next->ld_site) {
 			rc = -EBUSY;
 			goto out;
 		}
@@ -1063,7 +1061,6 @@ static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed,
 	struct list_head	     *el;
 	int found = 0, still_used = 0;
 
-	LASSERT(ec != NULL);
 	spin_lock(&ec->ec_lock);
 	list_for_each(el, &ec->ec_locks) {
 		ecl = list_entry(el, struct echo_lock, el_chain);
@@ -1121,7 +1118,7 @@ static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset,
 	int i;
 
 	LASSERT((offset & ~CFS_PAGE_MASK) == 0);
-	LASSERT(ed->ed_next != NULL);
+	LASSERT(ed->ed_next);
 	env = cl_env_get(&refcheck);
 	if (IS_ERR(env))
 		return PTR_ERR(env);
@@ -1393,11 +1390,11 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 		brw_flags = OBD_BRW_ASYNC;
 
 	pga = kcalloc(npages, sizeof(*pga), GFP_NOFS);
-	if (pga == NULL)
+	if (!pga)
 		return -ENOMEM;
 
 	pages = kcalloc(npages, sizeof(*pages), GFP_NOFS);
-	if (pages == NULL) {
+	if (!pages) {
 		kfree(pga);
 		return -ENOMEM;
 	}
@@ -1406,11 +1403,11 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 	     i < npages;
 	     i++, pgp++, off += PAGE_CACHE_SIZE) {
 
-		LASSERT(pgp->pg == NULL);      /* for cleanup */
+		LASSERT(!pgp->pg);      /* for cleanup */
 
 		rc = -ENOMEM;
 		pgp->pg = alloc_page(gfp_mask);
-		if (pgp->pg == NULL)
+		if (!pgp->pg)
 			goto out;
 
 		pages[i] = pgp->pg;
@@ -1425,7 +1422,7 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 	}
 
 	/* brw mode can only be used at client */
-	LASSERT(ed->ed_next != NULL);
+	LASSERT(ed->ed_next);
 	rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);
 
  out:
@@ -1433,7 +1430,7 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 		verify = 0;
 
 	for (i = 0, pgp = pga; i < npages; i++, pgp++) {
-		if (pgp->pg == NULL)
+		if (!pgp->pg)
 			continue;
 
 		if (verify) {
@@ -1475,7 +1472,7 @@ static int echo_client_prep_commit(const struct lu_env *env,
 	lnb = kcalloc(npages, sizeof(struct niobuf_local), GFP_NOFS);
 	rnb = kcalloc(npages, sizeof(struct niobuf_remote), GFP_NOFS);
 
-	if (lnb == NULL || rnb == NULL) {
+	if (!lnb || !rnb) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -1513,7 +1510,7 @@ static int echo_client_prep_commit(const struct lu_env *env,
 			struct page *page = lnb[i].page;
 
 			/* read past eof? */
-			if (page == NULL && lnb[i].rc == 0)
+			if (!page  && lnb[i].rc == 0)
 				continue;
 
 			if (async)
@@ -1582,7 +1579,7 @@ static int echo_client_brw_ioctl(const struct lu_env *env, int rw,
 	if (test_mode == 1)
 		async = 0;
 
-	if (ed->ed_next == NULL && test_mode != 3) {
+	if (!ed->ed_next && test_mode != 3) {
 		test_mode = 3;
 		data->ioc_plen1 = data->ioc_count;
 	}
@@ -1834,7 +1831,7 @@ static int echo_client_disconnect(struct obd_export *exp)
 {
 	int		     rc;
 
-	if (exp == NULL) {
+	if (!exp) {
 		rc = -EINVAL;
 		goto out;
 	}
-- 
2.1.0

[lustre-devel] [PATCH 24/45] staging/lustre/obdecho: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 .../staging/lustre/lustre/obdecho/echo_client.c    | 61 ++++++++++------------
 1 file changed, 29 insertions(+), 32 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdecho/echo_client.c b/drivers/staging/lustre/lustre/obdecho/echo_client.c
index 4ca82af..ca87cc2 100644
--- a/drivers/staging/lustre/lustre/obdecho/echo_client.c
+++ b/drivers/staging/lustre/lustre/obdecho/echo_client.c
@@ -146,7 +146,7 @@ static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
 	struct echo_thread_info *info;
 
 	info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -267,7 +267,7 @@ static void echo_page_completion(const struct lu_env *env,
 				 const struct cl_page_slice *slice,
 				 int ioret)
 {
-	LASSERT(slice->cpl_page->cp_sync_io != NULL);
+	LASSERT(slice->cpl_page->cp_sync_io);
 }
 
 static void echo_page_fini(const struct lu_env *env,
@@ -393,13 +393,13 @@ static int echo_lock_init(const struct lu_env *env,
 	struct echo_lock *el;
 
 	el = kmem_cache_alloc(echo_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (el != NULL) {
+	if (el) {
 		cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops);
 		el->el_object = cl2echo_obj(obj);
 		INIT_LIST_HEAD(&el->el_chain);
 		atomic_set(&el->el_refcount, 0);
 	}
-	return el == NULL ? -ENOMEM : 0;
+	return !el ? -ENOMEM : 0;
 }
 
 static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
@@ -439,7 +439,7 @@ static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
 		under = ed->ed_next;
 		below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
 							under);
-		if (below == NULL)
+		if (!below)
 			return -ENOMEM;
 		lu_object_add(obj, below);
 	}
@@ -470,12 +470,12 @@ static int echo_alloc_memmd(struct echo_device *ed,
 	int lsm_size;
 
 	/* If export is lov/osc then use their obd method */
-	if (ed->ed_next != NULL)
+	if (ed->ed_next)
 		return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp);
 	/* OFD has no unpackmd method, do everything here */
 	lsm_size = lov_stripe_md_size(1);
 
-	LASSERT(*lsmp == NULL);
+	LASSERT(!*lsmp);
 	*lsmp = kzalloc(lsm_size, GFP_NOFS);
 	if (!*lsmp)
 		return -ENOMEM;
@@ -498,12 +498,11 @@ static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp)
 	int lsm_size;
 
 	/* If export is lov/osc then use their obd method */
-	if (ed->ed_next != NULL)
+	if (ed->ed_next)
 		return obd_free_memmd(ed->ed_ec->ec_exp, lsmp);
 	/* OFD has no unpackmd method, do everything here */
 	lsm_size = lov_stripe_md_size(1);
 
-	LASSERT(*lsmp != NULL);
 	kfree((*lsmp)->lsm_oinfo[0]);
 	kfree(*lsmp);
 	*lsmp = NULL;
@@ -562,9 +561,9 @@ static struct lu_object *echo_object_alloc(const struct lu_env *env,
 	struct lu_object *obj = NULL;
 
 	/* we're the top dev. */
-	LASSERT(hdr == NULL);
+	LASSERT(!hdr);
 	eco = kmem_cache_alloc(echo_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (eco != NULL) {
+	if (eco) {
 		struct cl_object_header *hdr = &eco->eo_hdr;
 
 		obj = &echo_obj2cl(eco)->co_lu;
@@ -627,7 +626,7 @@ static void *echo_thread_key_init(const struct lu_context *ctx,
 	struct echo_thread_info *info;
 
 	info = kmem_cache_alloc(echo_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -658,7 +657,7 @@ static void *echo_session_key_init(const struct lu_context *ctx,
 	struct echo_session_info *session;
 
 	session = kmem_cache_alloc(echo_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (session == NULL)
+	if (!session)
 		session = ERR_PTR(-ENOMEM);
 	return session;
 }
@@ -715,11 +714,11 @@ static struct lu_device *echo_device_alloc(const struct lu_env *env,
 
 	cleanup = 2;
 	obd = class_name2obd(lustre_cfg_string(cfg, 0));
-	LASSERT(obd != NULL);
-	LASSERT(env != NULL);
+	LASSERT(obd);
+	LASSERT(env);
 
 	tgt = class_name2obd(lustre_cfg_string(cfg, 1));
-	if (tgt == NULL) {
+	if (!tgt) {
 		CERROR("Can not find tgt device %s\n",
 			lustre_cfg_string(cfg, 1));
 		rc = -ENODEV;
@@ -748,13 +747,12 @@ static struct lu_device *echo_device_alloc(const struct lu_env *env,
 
 	/* if echo client is to be stacked upon ost device, the next is
 	 * NULL since ost is not a clio device so far */
-	if (next != NULL && !lu_device_is_cl(next))
+	if (next && !lu_device_is_cl(next))
 		next = NULL;
 
 	tgt_type_name = tgt->obd_type->typ_name;
-	if (next != NULL) {
-		LASSERT(next != NULL);
-		if (next->ld_site != NULL) {
+	if (next) {
+		if (next->ld_site) {
 			rc = -EBUSY;
 			goto out;
 		}
@@ -1063,7 +1061,6 @@ static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed,
 	struct list_head	     *el;
 	int found = 0, still_used = 0;
 
-	LASSERT(ec != NULL);
 	spin_lock(&ec->ec_lock);
 	list_for_each(el, &ec->ec_locks) {
 		ecl = list_entry(el, struct echo_lock, el_chain);
@@ -1121,7 +1118,7 @@ static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset,
 	int i;
 
 	LASSERT((offset & ~CFS_PAGE_MASK) == 0);
-	LASSERT(ed->ed_next != NULL);
+	LASSERT(ed->ed_next);
 	env = cl_env_get(&refcheck);
 	if (IS_ERR(env))
 		return PTR_ERR(env);
@@ -1393,11 +1390,11 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 		brw_flags = OBD_BRW_ASYNC;
 
 	pga = kcalloc(npages, sizeof(*pga), GFP_NOFS);
-	if (pga == NULL)
+	if (!pga)
 		return -ENOMEM;
 
 	pages = kcalloc(npages, sizeof(*pages), GFP_NOFS);
-	if (pages == NULL) {
+	if (!pages) {
 		kfree(pga);
 		return -ENOMEM;
 	}
@@ -1406,11 +1403,11 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 	     i < npages;
 	     i++, pgp++, off += PAGE_CACHE_SIZE) {
 
-		LASSERT(pgp->pg == NULL);      /* for cleanup */
+		LASSERT(!pgp->pg);      /* for cleanup */
 
 		rc = -ENOMEM;
 		pgp->pg = alloc_page(gfp_mask);
-		if (pgp->pg == NULL)
+		if (!pgp->pg)
 			goto out;
 
 		pages[i] = pgp->pg;
@@ -1425,7 +1422,7 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 	}
 
 	/* brw mode can only be used at client */
-	LASSERT(ed->ed_next != NULL);
+	LASSERT(ed->ed_next);
 	rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);
 
  out:
@@ -1433,7 +1430,7 @@ static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
 		verify = 0;
 
 	for (i = 0, pgp = pga; i < npages; i++, pgp++) {
-		if (pgp->pg == NULL)
+		if (!pgp->pg)
 			continue;
 
 		if (verify) {
@@ -1475,7 +1472,7 @@ static int echo_client_prep_commit(const struct lu_env *env,
 	lnb = kcalloc(npages, sizeof(struct niobuf_local), GFP_NOFS);
 	rnb = kcalloc(npages, sizeof(struct niobuf_remote), GFP_NOFS);
 
-	if (lnb == NULL || rnb == NULL) {
+	if (!lnb || !rnb) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -1513,7 +1510,7 @@ static int echo_client_prep_commit(const struct lu_env *env,
 			struct page *page = lnb[i].page;
 
 			/* read past eof? */
-			if (page == NULL && lnb[i].rc == 0)
+			if (!page  && lnb[i].rc == 0)
 				continue;
 
 			if (async)
@@ -1582,7 +1579,7 @@ static int echo_client_brw_ioctl(const struct lu_env *env, int rw,
 	if (test_mode == 1)
 		async = 0;
 
-	if (ed->ed_next == NULL && test_mode != 3) {
+	if (!ed->ed_next && test_mode != 3) {
 		test_mode = 3;
 		data->ioc_plen1 = data->ioc_count;
 	}
@@ -1834,7 +1831,7 @@ static int echo_client_disconnect(struct obd_export *exp)
 {
 	int		     rc;
 
-	if (exp == NULL) {
+	if (!exp) {
 		rc = -EINVAL;
 		goto out;
 	}
-- 
2.1.0

[PATCH 25/45] staging/lustre/osc: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/osc/lproc_osc.c      |   4 +-
 drivers/staging/lustre/lustre/osc/osc_cache.c      | 120 ++++++++++---------
 .../staging/lustre/lustre/osc/osc_cl_internal.h    |   4 +-
 drivers/staging/lustre/lustre/osc/osc_dev.c        |   6 +-
 drivers/staging/lustre/lustre/osc/osc_io.c         |  19 ++-
 drivers/staging/lustre/lustre/osc/osc_lock.c       |  61 +++++-----
 drivers/staging/lustre/lustre/osc/osc_object.c     |   4 +-
 drivers/staging/lustre/lustre/osc/osc_page.c       |  22 ++--
 drivers/staging/lustre/lustre/osc/osc_quota.c      |  16 +--
 drivers/staging/lustre/lustre/osc/osc_request.c    | 130 ++++++++++-----------
 10 files changed, 189 insertions(+), 197 deletions(-)

diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
index b69ec0f..cb9edaf 100644
--- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
+++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c
@@ -381,7 +381,7 @@ static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 
 	DECLARE_CKSUM_NAME;
 
-	if (obd == NULL)
+	if (!obd)
 		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
@@ -406,7 +406,7 @@ static ssize_t osc_checksum_type_seq_write(struct file *file,
 	DECLARE_CKSUM_NAME;
 	char kernbuf[10];
 
-	if (obd == NULL)
+	if (!obd)
 		return 0;
 
 	if (count > sizeof(kernbuf) - 1)
diff --git a/drivers/staging/lustre/lustre/osc/osc_cache.c b/drivers/staging/lustre/lustre/osc/osc_cache.c
index 6b5f8d0..4704231 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cache.c
+++ b/drivers/staging/lustre/lustre/osc/osc_cache.c
@@ -140,7 +140,7 @@ static const char *oes_strings[] = {
 
 static inline struct osc_extent *rb_extent(struct rb_node *n)
 {
-	if (n == NULL)
+	if (!n)
 		return NULL;
 
 	return container_of(n, struct osc_extent, oe_node);
@@ -148,7 +148,7 @@ static inline struct osc_extent *rb_extent(struct rb_node *n)
 
 static inline struct osc_extent *next_extent(struct osc_extent *ext)
 {
-	if (ext == NULL)
+	if (!ext)
 		return NULL;
 
 	LASSERT(ext->oe_intree);
@@ -157,7 +157,7 @@ static inline struct osc_extent *next_extent(struct osc_extent *ext)
 
 static inline struct osc_extent *prev_extent(struct osc_extent *ext)
 {
-	if (ext == NULL)
+	if (!ext)
 		return NULL;
 
 	LASSERT(ext->oe_intree);
@@ -240,7 +240,7 @@ static int osc_extent_sanity_check0(struct osc_extent *ext,
 		goto out;
 	}
 
-	if (ext->oe_osclock == NULL && ext->oe_grants > 0) {
+	if (!ext->oe_osclock && ext->oe_grants > 0) {
 		rc = 90;
 		goto out;
 	}
@@ -319,7 +319,7 @@ static int osc_extent_is_overlapped(struct osc_object *obj,
 	if (!extent_debug)
 		return 0;
 
-	for (tmp = first_extent(obj); tmp != NULL; tmp = next_extent(tmp)) {
+	for (tmp = first_extent(obj); tmp; tmp = next_extent(tmp)) {
 		if (tmp == ext)
 			continue;
 		if (tmp->oe_end >= ext->oe_start &&
@@ -347,7 +347,7 @@ static struct osc_extent *osc_extent_alloc(struct osc_object *obj)
 	struct osc_extent *ext;
 
 	ext = kmem_cache_alloc(osc_extent_kmem, GFP_NOFS | __GFP_ZERO);
-	if (ext == NULL)
+	if (!ext)
 		return NULL;
 
 	RB_CLEAR_NODE(&ext->oe_node);
@@ -415,7 +415,7 @@ static struct osc_extent *osc_extent_search(struct osc_object *obj,
 	struct osc_extent *tmp, *p = NULL;
 
 	LASSERT(osc_object_is_locked(obj));
-	while (n != NULL) {
+	while (n) {
 		tmp = rb_extent(n);
 		if (index < tmp->oe_start) {
 			n = n->rb_left;
@@ -439,7 +439,7 @@ static struct osc_extent *osc_extent_lookup(struct osc_object *obj,
 	struct osc_extent *ext;
 
 	ext = osc_extent_search(obj, index);
-	if (ext != NULL && ext->oe_start <= index && index <= ext->oe_end)
+	if (ext && ext->oe_start <= index && index <= ext->oe_end)
 		return osc_extent_get(ext);
 	return NULL;
 }
@@ -454,7 +454,7 @@ static void osc_extent_insert(struct osc_object *obj, struct osc_extent *ext)
 	LASSERT(ext->oe_intree == 0);
 	LASSERT(ext->oe_obj == obj);
 	LASSERT(osc_object_is_locked(obj));
-	while (*n != NULL) {
+	while (*n) {
 		tmp = rb_extent(*n);
 		parent = *n;
 
@@ -533,7 +533,7 @@ static int osc_extent_merge(const struct lu_env *env, struct osc_extent *cur,
 
 	LASSERT(cur->oe_state == OES_CACHE);
 	LASSERT(osc_object_is_locked(obj));
-	if (victim == NULL)
+	if (!victim)
 		return -EINVAL;
 
 	if (victim->oe_state != OES_CACHE || victim->oe_fsync_wait)
@@ -639,11 +639,10 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
 	int rc;
 
 	cur = osc_extent_alloc(obj);
-	if (cur == NULL)
+	if (!cur)
 		return ERR_PTR(-ENOMEM);
 
 	lock = cl_lock_at_pgoff(env, osc2cl(obj), index, NULL, 1, 0);
-	LASSERT(lock != NULL);
 	LASSERT(lock->cll_descr.cld_mode >= CLM_WRITE);
 
 	LASSERT(cli->cl_chunkbits >= PAGE_CACHE_SHIFT);
@@ -678,9 +677,9 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
 restart:
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, cur->oe_start);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
-	while (ext != NULL) {
+	while (ext) {
 		loff_t ext_chk_start = ext->oe_start >> ppc_bits;
 		loff_t ext_chk_end = ext->oe_end >> ppc_bits;
 
@@ -775,21 +774,21 @@ restart:
 
 			found = osc_extent_hold(ext);
 		}
-		if (found != NULL)
+		if (found)
 			break;
 
 		ext = next_extent(ext);
 	}
 
 	osc_extent_tree_dump(D_CACHE, obj);
-	if (found != NULL) {
-		LASSERT(conflict == NULL);
+	if (found) {
+		LASSERT(!conflict);
 		if (!IS_ERR(found)) {
 			LASSERT(found->oe_osclock == cur->oe_osclock);
 			OSC_EXTENT_DUMP(D_CACHE, found,
 					"found caching ext for %lu.\n", index);
 		}
-	} else if (conflict == NULL) {
+	} else if (!conflict) {
 		/* create a new extent */
 		EASSERT(osc_extent_is_overlapped(obj, cur) == 0, cur);
 		cur->oe_grants = chunksize + cli->cl_extent_tax;
@@ -804,8 +803,8 @@ restart:
 	}
 	osc_object_unlock(obj);
 
-	if (conflict != NULL) {
-		LASSERT(found == NULL);
+	if (conflict) {
+		LASSERT(!found);
 
 		/* waiting for IO to finish. Please notice that it's impossible
 		 * to be an OES_TRUNC extent. */
@@ -1074,13 +1073,13 @@ static int osc_extent_make_ready(const struct lu_env *env,
 	LASSERT(sanity_check(ext) == 0);
 	/* in locking state, any process should not touch this extent. */
 	EASSERT(ext->oe_state == OES_LOCKING, ext);
-	EASSERT(ext->oe_owner != NULL, ext);
+	EASSERT(ext->oe_owner, ext);
 
 	OSC_EXTENT_DUMP(D_CACHE, ext, "make ready\n");
 
 	list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
 		++page_count;
-		if (last == NULL || last->oap_obj_off < oap->oap_obj_off)
+		if (!last || last->oap_obj_off < oap->oap_obj_off)
 			last = oap;
 
 		/* checking ASYNC_READY is race safe */
@@ -1103,7 +1102,7 @@ static int osc_extent_make_ready(const struct lu_env *env,
 	}
 
 	LASSERT(page_count == ext->oe_nr_pages);
-	LASSERT(last != NULL);
+	LASSERT(last);
 	/* the last page is the only one we need to refresh its count by
 	 * the size of file. */
 	if (!(last->oap_async_flags & ASYNC_COUNT_STABLE)) {
@@ -1167,7 +1166,7 @@ static int osc_extent_expand(struct osc_extent *ext, pgoff_t index, int *grants)
 	end_index = min(ext->oe_max_end, ((chunk + 1) << ppc_bits) - 1);
 
 	next = next_extent(ext);
-	if (next != NULL && next->oe_start <= end_index) {
+	if (next && next->oe_start <= end_index) {
 		/* complex mode - overlapped with the next extent,
 		 * this case will be handled by osc_extent_find() */
 		rc = -EAGAIN;
@@ -1197,7 +1196,7 @@ static void osc_extent_tree_dump0(int level, struct osc_object *obj,
 
 	/* osc_object_lock(obj); */
 	cnt = 1;
-	for (ext = first_extent(obj); ext != NULL; ext = next_extent(ext))
+	for (ext = first_extent(obj); ext; ext = next_extent(ext))
 		OSC_EXTENT_DUMP(level, ext, "in tree %d.\n", cnt++);
 
 	cnt = 1;
@@ -1262,7 +1261,6 @@ static int osc_refresh_count(const struct lu_env *env,
 
 	/* readpage queues with _COUNT_STABLE, shouldn't get here. */
 	LASSERT(!(cmd & OBD_BRW_READ));
-	LASSERT(opg != NULL);
 	obj = opg->ops_cl.cpl_obj;
 
 	cl_object_attr_lock(obj);
@@ -1299,16 +1297,16 @@ static int osc_completion(const struct lu_env *env, struct osc_async_page *oap,
 	 * page->cp_req can be NULL if io submission failed before
 	 * cl_req was allocated.
 	 */
-	if (page->cp_req != NULL)
+	if (page->cp_req)
 		cl_req_page_done(env, page);
-	LASSERT(page->cp_req == NULL);
+	LASSERT(!page->cp_req);
 
 	crt = cmd == OBD_BRW_READ ? CRT_READ : CRT_WRITE;
 	/* Clear opg->ops_transfer_pinned before VM lock is released. */
 	opg->ops_transfer_pinned = 0;
 
 	spin_lock(&obj->oo_seatbelt);
-	LASSERT(opg->ops_submitter != NULL);
+	LASSERT(opg->ops_submitter);
 	LASSERT(!list_empty(&opg->ops_inflight));
 	list_del_init(&opg->ops_inflight);
 	opg->ops_submitter = NULL;
@@ -1650,7 +1648,7 @@ static int osc_makes_rpc(struct client_obd *cli, struct osc_object *osc,
 	 * by forcing them through rpcs that immediately fail and complete
 	 * the pages.  recovery relies on this to empty the queued pages
 	 * before canceling the locks and evicting down the llite pages */
-	if ((cli->cl_import == NULL || cli->cl_import->imp_invalid))
+	if (!cli->cl_import || cli->cl_import->imp_invalid)
 		invalid_import = 1;
 
 	if (cmd & OBD_BRW_WRITE) {
@@ -1788,7 +1786,7 @@ static void osc_ap_completion(const struct lu_env *env, struct client_obd *cli,
 	struct lov_oinfo *loi = osc->oo_oinfo;
 	__u64 xid = 0;
 
-	if (oap->oap_request != NULL) {
+	if (oap->oap_request) {
 		xid = ptlrpc_req_xid(oap->oap_request);
 		ptlrpc_req_finished(oap->oap_request);
 		oap->oap_request = NULL;
@@ -1906,7 +1904,7 @@ static int get_write_extents(struct osc_object *obj, struct list_head *rpclist)
 		while ((ext = next_extent(ext)) != NULL) {
 			if ((ext->oe_state != OES_CACHE) ||
 			    (!list_empty(&ext->oe_link) &&
-			     ext->oe_owner != NULL))
+			     ext->oe_owner))
 				continue;
 
 			if (!try_to_add_extent_for_io(cli, ext, rpclist,
@@ -1918,10 +1916,10 @@ static int get_write_extents(struct osc_object *obj, struct list_head *rpclist)
 		return page_count;
 
 	ext = first_extent(obj);
-	while (ext != NULL) {
+	while (ext) {
 		if ((ext->oe_state != OES_CACHE) ||
 		    /* this extent may be already in current rpclist */
-		    (!list_empty(&ext->oe_link) && ext->oe_owner != NULL)) {
+		    (!list_empty(&ext->oe_link) && ext->oe_owner)) {
 			ext = next_extent(ext);
 			continue;
 		}
@@ -1980,7 +1978,7 @@ osc_send_write_rpc(const struct lu_env *env, struct client_obd *cli,
 				continue;
 			}
 		}
-		if (first == NULL) {
+		if (!first) {
 			first = ext;
 			srvlock = ext->oe_srvlock;
 		} else {
@@ -2074,7 +2072,7 @@ static struct osc_object *osc_next_obj(struct client_obd *cli)
 
 	/* then return all queued objects when we have an invalid import
 	 * so that they get flushed */
-	if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
+	if (!cli->cl_import || cli->cl_import->imp_invalid) {
 		if (!list_empty(&cli->cl_loi_write_list))
 			return list_to_obj(&cli->cl_loi_write_list, write_item);
 		if (!list_empty(&cli->cl_loi_read_list))
@@ -2158,7 +2156,7 @@ static int osc_io_unplug0(const struct lu_env *env, struct client_obd *cli,
 {
 	int rc = 0;
 
-	if (osc != NULL && osc_list_maint(cli, osc) == 0)
+	if (osc && osc_list_maint(cli, osc) == 0)
 		return 0;
 
 	if (!async) {
@@ -2171,7 +2169,7 @@ static int osc_io_unplug0(const struct lu_env *env, struct client_obd *cli,
 		atomic_dec(&cli->cl_lru_shrinkers);
 	} else {
 		CDEBUG(D_CACHE, "Queue writeback work for client %p.\n", cli);
-		LASSERT(cli->cl_writeback_work != NULL);
+		LASSERT(cli->cl_writeback_work);
 		rc = ptlrpcd_queue_work(cli->cl_writeback_work);
 	}
 	return rc;
@@ -2236,7 +2234,7 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 	if (oap->oap_magic != OAP_MAGIC)
 		return -EINVAL;
 
-	if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
+	if (!cli->cl_import || cli->cl_import->imp_invalid)
 		return -EIO;
 
 	if (!list_empty(&oap->oap_pending_item) ||
@@ -2290,7 +2288,7 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 	 * 2. otherwise, a new extent will be allocated. */
 
 	ext = oio->oi_active;
-	if (ext != NULL && ext->oe_start <= index && ext->oe_max_end >= index) {
+	if (ext && ext->oe_start <= index && ext->oe_max_end >= index) {
 		/* one chunk plus extent overhead must be enough to write this
 		 * page */
 		grants = (1 << cli->cl_chunkbits) + cli->cl_extent_tax;
@@ -2319,7 +2317,7 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 			}
 		}
 		rc = 0;
-	} else if (ext != NULL) {
+	} else if (ext) {
 		/* index is located outside of active extent */
 		need_release = 1;
 	}
@@ -2329,11 +2327,11 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 		ext = NULL;
 	}
 
-	if (ext == NULL) {
+	if (!ext) {
 		int tmp = (1 << cli->cl_chunkbits) + cli->cl_extent_tax;
 
 		/* try to find new extent to cover this page */
-		LASSERT(oio->oi_active == NULL);
+		LASSERT(!oio->oi_active);
 		/* we may have allocated grant for this page if we failed
 		 * to expand the previous active extent. */
 		LASSERT(ergo(grants > 0, grants >= tmp));
@@ -2362,8 +2360,8 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 			osc_unreserve_grant(cli, grants, tmp);
 	}
 
-	LASSERT(ergo(rc == 0, ext != NULL));
-	if (ext != NULL) {
+	LASSERT(ergo(rc == 0, ext));
+	if (ext) {
 		EASSERTF(ext->oe_end >= index && ext->oe_start <= index,
 			 ext, "index = %lu.\n", index);
 		LASSERT((oap->oap_brw_flags & OBD_BRW_FROM_GRANT) != 0);
@@ -2401,14 +2399,14 @@ int osc_teardown_async_page(const struct lu_env *env,
 		/* only truncated pages are allowed to be taken out.
 		 * See osc_extent_truncate() and osc_cache_truncate_start()
 		 * for details. */
-		if (ext != NULL && ext->oe_state != OES_TRUNC) {
+		if (ext && ext->oe_state != OES_TRUNC) {
 			OSC_EXTENT_DUMP(D_ERROR, ext, "trunc at %lu.\n",
 					oap2cl_page(oap)->cp_index);
 			rc = -EBUSY;
 		}
 	}
 	osc_object_unlock(obj);
-	if (ext != NULL)
+	if (ext)
 		osc_extent_put(env, ext);
 	return rc;
 }
@@ -2433,7 +2431,7 @@ int osc_flush_async_page(const struct lu_env *env, struct cl_io *io,
 
 	osc_object_lock(obj);
 	ext = osc_extent_lookup(obj, index);
-	if (ext == NULL) {
+	if (!ext) {
 		osc_extent_tree_dump(D_ERROR, obj);
 		LASSERTF(0, "page index %lu is NOT covered.\n", index);
 	}
@@ -2535,7 +2533,7 @@ int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops)
 			break;
 		}
 	}
-	if (found != NULL) {
+	if (found) {
 		list_del_init(&found->oe_link);
 		osc_update_pending(obj, cmd, -found->oe_nr_pages);
 		osc_object_unlock(obj);
@@ -2547,7 +2545,7 @@ int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops)
 		osc_object_unlock(obj);
 		/* ok, it's been put in an rpc. only one oap gets a request
 		 * reference */
-		if (oap->oap_request != NULL) {
+		if (oap->oap_request) {
 			ptlrpc_mark_interrupted(oap->oap_request);
 			ptlrpcd_wake(oap->oap_request);
 			ptlrpc_req_finished(oap->oap_request);
@@ -2582,7 +2580,7 @@ int osc_queue_sync_pages(const struct lu_env *env, struct osc_object *obj,
 	}
 
 	ext = osc_extent_alloc(obj);
-	if (ext == NULL) {
+	if (!ext) {
 		list_for_each_entry_safe(oap, tmp, list, oap_pending_item) {
 			list_del_init(&oap->oap_pending_item);
 			osc_ap_completion(env, cli, oap, 0, -ENOMEM);
@@ -2637,11 +2635,11 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
 again:
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, index);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
 	else if (ext->oe_end < index)
 		ext = next_extent(ext);
-	while (ext != NULL) {
+	while (ext) {
 		EASSERT(ext->oe_state != OES_TRUNC, ext);
 
 		if (ext->oe_state > OES_CACHE || ext->oe_urgent) {
@@ -2714,14 +2712,14 @@ again:
 			/* we need to hold this extent in OES_TRUNC state so
 			 * that no writeback will happen. This is to avoid
 			 * BUG 17397. */
-			LASSERT(oio->oi_trunc == NULL);
+			LASSERT(!oio->oi_trunc);
 			oio->oi_trunc = osc_extent_get(ext);
 			OSC_EXTENT_DUMP(D_CACHE, ext,
 					"trunc at %llu\n", size);
 		}
 		osc_extent_put(env, ext);
 	}
-	if (waiting != NULL) {
+	if (waiting) {
 		int rc;
 
 		/* ignore the result of osc_extent_wait the write initiator
@@ -2746,7 +2744,7 @@ void osc_cache_truncate_end(const struct lu_env *env, struct osc_io *oio,
 	struct osc_extent *ext = oio->oi_trunc;
 
 	oio->oi_trunc = NULL;
-	if (ext != NULL) {
+	if (ext) {
 		bool unplug = false;
 
 		EASSERT(ext->oe_nr_pages > 0, ext);
@@ -2789,11 +2787,11 @@ int osc_cache_wait_range(const struct lu_env *env, struct osc_object *obj,
 again:
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, index);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
 	else if (ext->oe_end < index)
 		ext = next_extent(ext);
-	while (ext != NULL) {
+	while (ext) {
 		int rc;
 
 		if (ext->oe_start > end)
@@ -2844,11 +2842,11 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
 
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, start);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
 	else if (ext->oe_end < start)
 		ext = next_extent(ext);
-	while (ext != NULL) {
+	while (ext) {
 		if (ext->oe_start > end)
 			break;
 
@@ -2867,7 +2865,7 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
 					ext->oe_urgent = 1;
 					list = &obj->oo_urgent_exts;
 				}
-				if (list != NULL)
+				if (list)
 					list_move_tail(&ext->oe_link, list);
 				unplug = true;
 			} else {
diff --git a/drivers/staging/lustre/lustre/osc/osc_cl_internal.h b/drivers/staging/lustre/lustre/osc/osc_cl_internal.h
index 415c27e..73d43ab 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cl_internal.h
+++ b/drivers/staging/lustre/lustre/osc/osc_cl_internal.h
@@ -472,7 +472,7 @@ static inline struct osc_thread_info *osc_env_info(const struct lu_env *env)
 	struct osc_thread_info *info;
 
 	info = lu_context_key_get(&env->le_ctx, &osc_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -481,7 +481,7 @@ static inline struct osc_session *osc_env_session(const struct lu_env *env)
 	struct osc_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &osc_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
diff --git a/drivers/staging/lustre/lustre/osc/osc_dev.c b/drivers/staging/lustre/lustre/osc/osc_dev.c
index 7078cc5..67cb6e4 100644
--- a/drivers/staging/lustre/lustre/osc/osc_dev.c
+++ b/drivers/staging/lustre/lustre/osc/osc_dev.c
@@ -123,7 +123,7 @@ static void *osc_key_init(const struct lu_context *ctx,
 	struct osc_thread_info *info;
 
 	info = kmem_cache_alloc(osc_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -148,7 +148,7 @@ static void *osc_session_init(const struct lu_context *ctx,
 	struct osc_session *info;
 
 	info = kmem_cache_alloc(osc_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -228,7 +228,7 @@ static struct lu_device *osc_device_alloc(const struct lu_env *env,
 
 	/* Setup OSC OBD */
 	obd = class_name2obd(lustre_cfg_string(cfg, 0));
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = osc_setup(obd, cfg);
 	if (rc) {
 		osc_device_free(env, d);
diff --git a/drivers/staging/lustre/lustre/osc/osc_io.c b/drivers/staging/lustre/lustre/osc/osc_io.c
index abd0beb..9dfcc26 100644
--- a/drivers/staging/lustre/lustre/osc/osc_io.c
+++ b/drivers/staging/lustre/lustre/osc/osc_io.c
@@ -73,7 +73,7 @@ static struct osc_page *osc_cl_page_osc(struct cl_page *page)
 	const struct cl_page_slice *slice;
 
 	slice = cl_page_at(page, &osc_device_type);
-	LASSERT(slice != NULL);
+	LASSERT(slice);
 
 	return cl2osc_page(slice);
 }
@@ -135,7 +135,7 @@ static int osc_io_submit(const struct lu_env *env,
 
 		/* Top level IO. */
 		io = page->cp_owner;
-		LASSERT(io != NULL);
+		LASSERT(io);
 
 		opg = osc_cl_page_osc(page);
 		oap = &opg->ops_oap;
@@ -266,7 +266,7 @@ static int osc_io_prepare_write(const struct lu_env *env,
 	 * This implements OBD_BRW_CHECK logic from old client.
 	 */
 
-	if (imp == NULL || imp->imp_invalid)
+	if (!imp || imp->imp_invalid)
 		result = -EIO;
 	if (result == 0 && oio->oi_lockless)
 		/* this page contains `invalid' data, but who cares?
@@ -349,7 +349,7 @@ static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
 	__u64 start = *(__u64 *)cbdata;
 
 	slice = cl_page_at(page, &osc_device_type);
-	LASSERT(slice != NULL);
+	LASSERT(slice);
 	ops = cl2osc_page(slice);
 	oap = &ops->ops_oap;
 
@@ -500,7 +500,7 @@ static void osc_io_setattr_end(const struct lu_env *env,
 		__u64 size = io->u.ci_setattr.sa_attr.lvb_size;
 
 		osc_trunc_check(env, io, oio, size);
-		if (oio->oi_trunc != NULL) {
+		if (oio->oi_trunc) {
 			osc_cache_truncate_end(env, oio, cl2osc(obj));
 			oio->oi_trunc = NULL;
 		}
@@ -754,7 +754,7 @@ static void osc_req_attr_set(const struct lu_env *env,
 		opg = osc_cl_page_osc(apage);
 		apage = opg->ops_cl.cpl_page; /* now apage is a sub-page */
 		lock = cl_lock_at_page(env, apage->cp_obj, apage, NULL, 1, 1);
-		if (lock == NULL) {
+		if (!lock) {
 			struct cl_object_header *head;
 			struct cl_lock *scan;
 
@@ -770,10 +770,9 @@ static void osc_req_attr_set(const struct lu_env *env,
 		}
 
 		olck = osc_lock_at(lock);
-		LASSERT(olck != NULL);
-		LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
+		LASSERT(ergo(opg->ops_srvlock, !olck->ols_lock));
 		/* check for lockless io. */
-		if (olck->ols_lock != NULL) {
+		if (olck->ols_lock) {
 			oa->o_handle = olck->ols_lock->l_remote_handle;
 			oa->o_valid |= OBD_MD_FLHANDLE;
 		}
@@ -804,7 +803,7 @@ int osc_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	or = kmem_cache_alloc(osc_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (or != NULL) {
+	if (or) {
 		cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);
 		result = 0;
 	} else
diff --git a/drivers/staging/lustre/lustre/osc/osc_lock.c b/drivers/staging/lustre/lustre/osc/osc_lock.c
index 71f2810..cc9d7ea 100644
--- a/drivers/staging/lustre/lustre/osc/osc_lock.c
+++ b/drivers/staging/lustre/lustre/osc/osc_lock.c
@@ -79,7 +79,7 @@ static struct ldlm_lock *osc_handle_ptr(struct lustre_handle *handle)
 	struct ldlm_lock *lock;
 
 	lock = ldlm_handle2lock(handle);
-	if (lock != NULL)
+	if (lock)
 		LDLM_LOCK_PUT(lock);
 	return lock;
 }
@@ -94,42 +94,40 @@ static int osc_lock_invariant(struct osc_lock *ols)
 	int handle_used = lustre_handle_is_used(&ols->ols_handle);
 
 	if (ergo(osc_lock_is_lockless(ols),
-		 ols->ols_locklessable && ols->ols_lock == NULL))
+		 ols->ols_locklessable && !ols->ols_lock))
 		return 1;
 
 	/*
 	 * If all the following "ergo"s are true, return 1, otherwise 0
 	 */
-	if (!ergo(olock != NULL, handle_used))
+	if (!ergo(olock, handle_used))
 		return 0;
 
-	if (!ergo(olock != NULL,
-		   olock->l_handle.h_cookie == ols->ols_handle.cookie))
+	if (!ergo(olock, olock->l_handle.h_cookie == ols->ols_handle.cookie))
 		return 0;
 
 	if (!ergo(handle_used,
-		   ergo(lock != NULL && olock != NULL, lock == olock) &&
-		   ergo(lock == NULL, olock == NULL)))
+		  ergo(lock && olock, lock == olock) &&
+		  ergo(!lock, !olock)))
 		return 0;
 	/*
 	 * Check that ->ols_handle and ->ols_lock are consistent, but
 	 * take into account that they are set at the different time.
 	 */
 	if (!ergo(ols->ols_state == OLS_CANCELLED,
-		   olock == NULL && !handle_used))
+		  !olock && !handle_used))
 		return 0;
 	/*
 	 * DLM lock is destroyed only after we have seen cancellation
 	 * ast.
 	 */
-	if (!ergo(olock != NULL && ols->ols_state < OLS_CANCELLED,
-		   ((olock->l_flags & LDLM_FL_DESTROYED) == 0)))
+	if (!ergo(olock && ols->ols_state < OLS_CANCELLED,
+		  ((olock->l_flags & LDLM_FL_DESTROYED) == 0)))
 		return 0;
 
 	if (!ergo(ols->ols_state == OLS_GRANTED,
-		   olock != NULL &&
-		   olock->l_req_mode == olock->l_granted_mode &&
-		   ols->ols_hold))
+		  olock && olock->l_req_mode == olock->l_granted_mode &&
+		  ols->ols_hold))
 		return 0;
 	return 1;
 }
@@ -149,7 +147,7 @@ static void osc_lock_detach(const struct lu_env *env, struct osc_lock *olck)
 
 	spin_lock(&osc_ast_guard);
 	dlmlock = olck->ols_lock;
-	if (dlmlock == NULL) {
+	if (!dlmlock) {
 		spin_unlock(&osc_ast_guard);
 		return;
 	}
@@ -247,7 +245,7 @@ static void osc_lock_fini(const struct lu_env *env,
 	 * lock is destroyed immediately after upcall.
 	 */
 	osc_lock_unhold(ols);
-	LASSERT(ols->ols_lock == NULL);
+	LASSERT(!ols->ols_lock);
 	LASSERT(atomic_read(&ols->ols_pageref) == 0 ||
 		atomic_read(&ols->ols_pageref) == _PAGEREF_MAGIC);
 
@@ -292,7 +290,7 @@ static struct osc_lock *osc_ast_data_get(struct ldlm_lock *dlm_lock)
 	lock_res_and_lock(dlm_lock);
 	spin_lock(&osc_ast_guard);
 	olck = dlm_lock->l_ast_data;
-	if (olck != NULL) {
+	if (olck) {
 		struct cl_lock *lock = olck->ols_cl.cls_lock;
 		/*
 		 * If osc_lock holds a reference on ldlm lock, return it even
@@ -359,7 +357,6 @@ static void osc_lock_lvb_update(const struct lu_env *env, struct osc_lock *olck,
 		__u64 size;
 
 		dlmlock = olck->ols_lock;
-		LASSERT(dlmlock != NULL);
 
 		/* re-grab LVB from a dlm lock under DLM spin-locks. */
 		*lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
@@ -444,12 +441,12 @@ static void osc_lock_upcall0(const struct lu_env *env, struct osc_lock *olck)
 	struct ldlm_lock *dlmlock;
 
 	dlmlock = ldlm_handle2lock_long(&olck->ols_handle, 0);
-	LASSERT(dlmlock != NULL);
+	LASSERT(dlmlock);
 
 	lock_res_and_lock(dlmlock);
 	spin_lock(&osc_ast_guard);
 	LASSERT(dlmlock->l_ast_data == olck);
-	LASSERT(olck->ols_lock == NULL);
+	LASSERT(!olck->ols_lock);
 	olck->ols_lock = dlmlock;
 	spin_unlock(&osc_ast_guard);
 
@@ -508,10 +505,10 @@ static int osc_lock_upcall(void *cookie, int errcode)
 			struct ldlm_lock *dlmlock;
 
 			dlmlock = ldlm_handle2lock(&olck->ols_handle);
-			if (dlmlock != NULL) {
+			if (dlmlock) {
 				lock_res_and_lock(dlmlock);
 				spin_lock(&osc_ast_guard);
-				LASSERT(olck->ols_lock == NULL);
+				LASSERT(!olck->ols_lock);
 				dlmlock->l_ast_data = NULL;
 				olck->ols_handle.cookie = 0ULL;
 				spin_unlock(&osc_ast_guard);
@@ -634,7 +631,7 @@ static int osc_dlm_blocking_ast0(const struct lu_env *env,
 
 	cancel = 0;
 	olck = osc_ast_data_get(dlmlock);
-	if (olck != NULL) {
+	if (olck) {
 		lock = olck->ols_cl.cls_lock;
 		cl_lock_mutex_get(env, lock);
 		LINVRNT(osc_lock_invariant(olck));
@@ -786,17 +783,17 @@ static int osc_ldlm_completion_ast(struct ldlm_lock *dlmlock,
 	env = cl_env_nested_get(&nest);
 	if (!IS_ERR(env)) {
 		olck = osc_ast_data_get(dlmlock);
-		if (olck != NULL) {
+		if (olck) {
 			lock = olck->ols_cl.cls_lock;
 			cl_lock_mutex_get(env, lock);
 			/*
 			 * ldlm_handle_cp_callback() copied LVB from request
 			 * to lock->l_lvb_data, store it in osc_lock.
 			 */
-			LASSERT(dlmlock->l_lvb_data != NULL);
+			LASSERT(dlmlock->l_lvb_data);
 			lock_res_and_lock(dlmlock);
 			olck->ols_lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
-			if (olck->ols_lock == NULL) {
+			if (!olck->ols_lock) {
 				/*
 				 * upcall (osc_lock_upcall()) hasn't yet been
 				 * called. Do nothing now, upcall will bind
@@ -850,7 +847,7 @@ static int osc_ldlm_glimpse_ast(struct ldlm_lock *dlmlock, void *data)
 		 * environment.
 		 */
 		olck = osc_ast_data_get(dlmlock);
-		if (olck != NULL) {
+		if (olck) {
 			lock = olck->ols_cl.cls_lock;
 			/* Do not grab the mutex of cl_lock for glimpse.
 			 * See LU-1274 for details.
@@ -1074,7 +1071,7 @@ static int osc_lock_enqueue_wait(const struct lu_env *env,
 		} else {
 			CDEBUG(D_DLMTRACE, "lock %p is conflicted with %p, will wait\n",
 			       lock, conflict);
-			LASSERT(lock->cll_conflict == NULL);
+			LASSERT(!lock->cll_conflict);
 			lu_ref_add(&conflict->cll_reference, "cancel-wait",
 				   lock);
 			lock->cll_conflict = conflict;
@@ -1197,7 +1194,7 @@ static int osc_lock_wait(const struct lu_env *env,
 	}
 
 	LASSERT(equi(olck->ols_state >= OLS_UPCALL_RECEIVED &&
-		     lock->cll_error == 0, olck->ols_lock != NULL));
+		     lock->cll_error == 0, olck->ols_lock));
 
 	return lock->cll_error ?: olck->ols_state >= OLS_GRANTED ? 0 : CLO_WAIT;
 }
@@ -1306,7 +1303,7 @@ static void osc_lock_cancel(const struct lu_env *env,
 	LASSERT(cl_lock_is_mutexed(lock));
 	LINVRNT(osc_lock_invariant(olck));
 
-	if (dlmlock != NULL) {
+	if (dlmlock) {
 		int do_cancel;
 
 		discard = !!(dlmlock->l_flags & LDLM_FL_DISCARD_DATA);
@@ -1382,7 +1379,7 @@ static void osc_lock_state(const struct lu_env *env,
 	if (state == CLS_HELD && slice->cls_lock->cll_state != CLS_HELD) {
 		struct osc_io *oio = osc_env_io(env);
 
-		LASSERT(lock->ols_owner == NULL);
+		LASSERT(!lock->ols_owner);
 		lock->ols_owner = oio;
 	} else if (state != CLS_HELD)
 		lock->ols_owner = NULL;
@@ -1556,7 +1553,7 @@ int osc_lock_init(const struct lu_env *env,
 	int result;
 
 	clk = kmem_cache_alloc(osc_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (clk != NULL) {
+	if (clk) {
 		__u32 enqflags = lock->cll_descr.cld_enq_flags;
 
 		osc_lock_build_einfo(env, lock, clk, &clk->ols_einfo);
@@ -1599,7 +1596,7 @@ int osc_dlm_lock_pageref(struct ldlm_lock *dlm)
 	 * doesn't matter because in the worst case we don't cancel a lock
 	 * which we actually can, that's no harm.
 	 */
-	if (olock != NULL &&
+	if (olock &&
 	    atomic_add_return(_PAGEREF_MAGIC,
 				  &olock->ols_pageref) != _PAGEREF_MAGIC) {
 		atomic_sub(_PAGEREF_MAGIC, &olock->ols_pageref);
diff --git a/drivers/staging/lustre/lustre/osc/osc_object.c b/drivers/staging/lustre/lustre/osc/osc_object.c
index fdd6219..60d8230 100644
--- a/drivers/staging/lustre/lustre/osc/osc_object.c
+++ b/drivers/staging/lustre/lustre/osc/osc_object.c
@@ -113,7 +113,7 @@ static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
 	LASSERT(list_empty(&osc->oo_write_item));
 	LASSERT(list_empty(&osc->oo_read_item));
 
-	LASSERT(osc->oo_root.rb_node == NULL);
+	LASSERT(!osc->oo_root.rb_node);
 	LASSERT(list_empty(&osc->oo_hp_exts));
 	LASSERT(list_empty(&osc->oo_urgent_exts));
 	LASSERT(list_empty(&osc->oo_rpc_exts));
@@ -256,7 +256,7 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
 	struct lu_object *obj;
 
 	osc = kmem_cache_alloc(osc_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (osc != NULL) {
+	if (osc) {
 		obj = osc2lu(osc);
 		lu_object_init(obj, NULL, dev);
 		osc->oo_cl.co_ops = &osc_ops;
diff --git a/drivers/staging/lustre/lustre/osc/osc_page.c b/drivers/staging/lustre/lustre/osc/osc_page.c
index 99d5b56..5cb0ccc 100644
--- a/drivers/staging/lustre/lustre/osc/osc_page.c
+++ b/drivers/staging/lustre/lustre/osc/osc_page.c
@@ -69,7 +69,7 @@ static void osc_page_fini(const struct lu_env *env,
 	struct osc_page *opg = cl2osc_page(slice);
 
 	CDEBUG(D_TRACE, "%p\n", opg);
-	LASSERT(opg->ops_lock == NULL);
+	LASSERT(!opg->ops_lock);
 }
 
 static void osc_page_transfer_get(struct osc_page *opg, const char *label)
@@ -135,7 +135,7 @@ static int osc_page_cache_add(const struct lu_env *env,
 	 * osc_io_end() is called, so release it earlier.
 	 * for mkwrite(), it's known there is no further pages. */
 	if (cl_io_is_sync_write(io) || cl_io_is_mkwrite(io)) {
-		if (oio->oi_active != NULL) {
+		if (oio->oi_active) {
 			osc_extent_release(env, oio->oi_active);
 			oio->oi_active = NULL;
 		}
@@ -159,7 +159,7 @@ static int osc_page_addref_lock(const struct lu_env *env,
 	struct osc_lock *olock;
 	int rc;
 
-	LASSERT(opg->ops_lock == NULL);
+	LASSERT(!opg->ops_lock);
 
 	olock = osc_lock_at(lock);
 	if (atomic_inc_return(&olock->ols_pageref) <= 0) {
@@ -179,7 +179,7 @@ static void osc_page_putref_lock(const struct lu_env *env,
 	struct cl_lock *lock = opg->ops_lock;
 	struct osc_lock *olock;
 
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	olock = osc_lock_at(lock);
 
 	atomic_dec(&olock->ols_pageref);
@@ -197,7 +197,7 @@ static int osc_page_is_under_lock(const struct lu_env *env,
 
 	lock = cl_lock_at_page(env, slice->cpl_obj, slice->cpl_page,
 			       NULL, 1, 0);
-	if (lock != NULL) {
+	if (lock) {
 		if (osc_page_addref_lock(env, cl2osc_page(slice), lock) == 0)
 			result = -EBUSY;
 		cl_lock_put(env, lock);
@@ -325,7 +325,7 @@ static void osc_page_delete(const struct lu_env *env,
 	}
 
 	spin_lock(&obj->oo_seatbelt);
-	if (opg->ops_submitter != NULL) {
+	if (opg->ops_submitter) {
 		LASSERT(!list_empty(&opg->ops_inflight));
 		list_del_init(&opg->ops_inflight);
 		opg->ops_submitter = NULL;
@@ -589,14 +589,14 @@ int osc_lru_shrink(struct client_obd *cli, int target)
 			continue;
 		}
 
-		LASSERT(page->cp_obj != NULL);
+		LASSERT(page->cp_obj);
 		if (clobj != page->cp_obj) {
 			struct cl_object *tmp = page->cp_obj;
 
 			cl_object_get(tmp);
 			client_obd_list_unlock(&cli->cl_lru_list_lock);
 
-			if (clobj != NULL) {
+			if (clobj) {
 				count -= discard_pagevec(env, io, pvec, index);
 				index = 0;
 
@@ -641,7 +641,7 @@ int osc_lru_shrink(struct client_obd *cli, int target)
 	}
 	client_obd_list_unlock(&cli->cl_lru_list_lock);
 
-	if (clobj != NULL) {
+	if (clobj) {
 		count -= discard_pagevec(env, io, pvec, index);
 
 		cl_io_fini(env, io);
@@ -720,7 +720,7 @@ static int osc_lru_reclaim(struct client_obd *cli)
 	int max_scans;
 	int rc;
 
-	LASSERT(cache != NULL);
+	LASSERT(cache);
 
 	rc = osc_lru_shrink(cli, lru_shrink_min);
 	if (rc != 0) {
@@ -776,7 +776,7 @@ static int osc_lru_reserve(const struct lu_env *env, struct osc_object *obj,
 	struct client_obd *cli = osc_cli(obj);
 	int rc = 0;
 
-	if (cli->cl_cache == NULL) /* shall not be in LRU */
+	if (!cli->cl_cache) /* shall not be in LRU */
 		return 0;
 
 	LASSERT(atomic_read(cli->cl_lru_left) >= 0);
diff --git a/drivers/staging/lustre/lustre/osc/osc_quota.c b/drivers/staging/lustre/lustre/osc/osc_quota.c
index e70e796..d6731c5 100644
--- a/drivers/staging/lustre/lustre/osc/osc_quota.c
+++ b/drivers/staging/lustre/lustre/osc/osc_quota.c
@@ -36,7 +36,7 @@ static inline struct osc_quota_info *osc_oqi_alloc(u32 id)
 	struct osc_quota_info *oqi;
 
 	oqi = kmem_cache_alloc(osc_quota_kmem, GFP_NOFS | __GFP_ZERO);
-	if (oqi != NULL)
+	if (oqi)
 		oqi->oqi_id = id;
 
 	return oqi;
@@ -90,11 +90,11 @@ int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
 		if ((flags & FL_QUOTA_FLAG(type)) != 0) {
 			/* This ID is getting close to its quota limit, let's
 			 * switch to sync I/O */
-			if (oqi != NULL)
+			if (oqi)
 				continue;
 
 			oqi = osc_oqi_alloc(qid[type]);
-			if (oqi == NULL) {
+			if (!oqi) {
 				rc = -ENOMEM;
 				break;
 			}
@@ -114,7 +114,7 @@ int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
 		} else {
 			/* This ID is now off the hook, let's remove it from
 			 * the hash table */
-			if (oqi == NULL)
+			if (!oqi)
 				continue;
 
 			oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
@@ -147,7 +147,7 @@ oqi_keycmp(const void *key, struct hlist_node *hnode)
 	struct osc_quota_info *oqi;
 	u32 uid;
 
-	LASSERT(key != NULL);
+	LASSERT(key);
 	uid = *((u32 *)key);
 	oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 
@@ -218,7 +218,7 @@ int osc_quota_setup(struct obd_device *obd)
 							   CFS_HASH_MAX_THETA,
 							   &quota_hash_ops,
 							   CFS_HASH_DEFAULT);
-		if (cli->cl_quota_hash[type] == NULL)
+		if (!cli->cl_quota_hash[type])
 			break;
 	}
 
@@ -252,7 +252,7 @@ int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 					OST_QUOTACTL);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
@@ -294,7 +294,7 @@ int osc_quotacheck(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_OST_QUOTACHECK, LUSTRE_OST_VERSION,
 					OST_QUOTACHECK);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
diff --git a/drivers/staging/lustre/lustre/osc/osc_request.c b/drivers/staging/lustre/lustre/osc/osc_request.c
index 3ae00fc..23a11c4 100644
--- a/drivers/staging/lustre/lustre/osc/osc_request.c
+++ b/drivers/staging/lustre/lustre/osc/osc_request.c
@@ -113,18 +113,18 @@ static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
 	int lmm_size;
 
 	lmm_size = sizeof(**lmmp);
-	if (lmmp == NULL)
+	if (!lmmp)
 		return lmm_size;
 
-	if (*lmmp != NULL && lsm == NULL) {
+	if (*lmmp && !lsm) {
 		kfree(*lmmp);
 		*lmmp = NULL;
 		return 0;
-	} else if (unlikely(lsm != NULL && ostid_id(&lsm->lsm_oi) == 0)) {
+	} else if (unlikely(lsm && ostid_id(&lsm->lsm_oi) == 0)) {
 		return -EBADF;
 	}
 
-	if (*lmmp == NULL) {
+	if (!*lmmp) {
 		*lmmp = kzalloc(lmm_size, GFP_NOFS);
 		if (!*lmmp)
 			return -ENOMEM;
@@ -143,7 +143,7 @@ static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	int lsm_size;
 	struct obd_import *imp = class_exp2cliimp(exp);
 
-	if (lmm != NULL) {
+	if (lmm) {
 		if (lmm_bytes < sizeof(*lmm)) {
 			CERROR("%s: lov_mds_md too small: %d, need %d\n",
 			       exp->exp_obd->obd_name, lmm_bytes,
@@ -160,23 +160,23 @@ static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	}
 
 	lsm_size = lov_stripe_md_size(1);
-	if (lsmp == NULL)
+	if (!lsmp)
 		return lsm_size;
 
-	if (*lsmp != NULL && lmm == NULL) {
+	if (*lsmp && !lmm) {
 		kfree((*lsmp)->lsm_oinfo[0]);
 		kfree(*lsmp);
 		*lsmp = NULL;
 		return 0;
 	}
 
-	if (*lsmp == NULL) {
+	if (!*lsmp) {
 		*lsmp = kzalloc(lsm_size, GFP_NOFS);
-		if (unlikely(*lsmp == NULL))
+		if (unlikely(!*lsmp))
 			return -ENOMEM;
 		(*lsmp)->lsm_oinfo[0] = kzalloc(sizeof(struct lov_oinfo),
 						GFP_NOFS);
-		if (unlikely((*lsmp)->lsm_oinfo[0] == NULL)) {
+		if (unlikely(!(*lsmp)->lsm_oinfo[0])) {
 			kfree(*lsmp);
 			return -ENOMEM;
 		}
@@ -185,11 +185,11 @@ static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 		return -EBADF;
 	}
 
-	if (lmm != NULL)
+	if (lmm)
 		/* XXX zero *lsmp? */
 		ostid_le_to_cpu(&lmm->lmm_oi, &(*lsmp)->lsm_oi);
 
-	if (imp != NULL &&
+	if (imp &&
 	    (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
 		(*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
 	else
@@ -246,7 +246,7 @@ static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
@@ -276,7 +276,7 @@ static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
@@ -294,7 +294,7 @@ static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -321,7 +321,7 @@ static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
 	LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
@@ -339,7 +339,7 @@ static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -362,7 +362,7 @@ static int osc_setattr_interpret(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -384,7 +384,7 @@ int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
@@ -451,7 +451,7 @@ static int osc_real_create(struct obd_export *exp, struct obdo *oa,
 	}
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -482,7 +482,7 @@ static int osc_real_create(struct obd_export *exp, struct obdo *oa,
 		goto out_req;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out_req;
 	}
@@ -500,7 +500,7 @@ static int osc_real_create(struct obd_export *exp, struct obdo *oa,
 	lsm->lsm_oi = oa->o_oi;
 	*ea = lsm;
 
-	if (oti != NULL) {
+	if (oti) {
 		oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
 
 		if (oa->o_valid & OBD_MD_FLCOOKIE) {
@@ -530,7 +530,7 @@ int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
@@ -573,7 +573,7 @@ static int osc_sync_interpret(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		CERROR("can't unpack ost_body\n");
 		rc = -EPROTO;
 		goto out;
@@ -595,7 +595,7 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
@@ -650,7 +650,7 @@ static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
 
 	ostid_build_res_name(&oa->o_oi, &res_id);
 	res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 
 	LDLM_RESOURCE_ADDREF(res);
@@ -743,7 +743,7 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
 					LDLM_FL_DISCARD_DATA);
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -758,7 +758,7 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
 	req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
 	ptlrpc_at_set_req_timeout(req);
 
-	if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
+	if (oti && oa->o_valid & OBD_MD_FLCOOKIE)
 		oa->o_lcookie = *oti->oti_logcookies;
 	body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 	LASSERT(body);
@@ -1106,7 +1106,7 @@ static int check_write_rcs(struct ptlrpc_request *req,
 	remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
 						  sizeof(*remote_rcs) *
 						  niocount);
-	if (remote_rcs == NULL) {
+	if (!remote_rcs) {
 		CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
 		return -EPROTO;
 	}
@@ -1244,7 +1244,7 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
 		opc = OST_READ;
 		req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
 	}
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	for (niocount = i = 1; i < page_count; i++) {
@@ -1274,7 +1274,7 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
 		opc == OST_WRITE ? BULK_GET_SOURCE : BULK_PUT_SINK,
 		OST_BULK_PORTAL);
 
-	if (desc == NULL) {
+	if (!desc) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1283,7 +1283,7 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
 	body = req_capsule_client_get(pill, &RMF_OST_BODY);
 	ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
 	niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
-	LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
+	LASSERT(body && ioobj && niobuf);
 
 	lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 
@@ -1472,9 +1472,9 @@ static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
 		return rc;
 	}
 
-	LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
+	LASSERTF(req->rq_repmsg, "rc = %d\n", rc);
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
 		return -EPROTO;
 	}
@@ -1627,7 +1627,7 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
 		return rc;
 
 	list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
-		if (oap->oap_request != NULL) {
+		if (oap->oap_request) {
 			LASSERTF(request == oap->oap_request,
 				 "request %p != oap_request %p\n",
 				 request, oap->oap_request);
@@ -1709,7 +1709,7 @@ static void sort_brw_pages(struct brw_page **array, int num)
 
 static void osc_release_ppga(struct brw_page **ppga, u32 count)
 {
-	LASSERT(ppga != NULL);
+	LASSERT(ppga);
 	kfree(ppga);
 }
 
@@ -1748,7 +1748,7 @@ static int brw_interpret(const struct lu_env *env,
 	}
 
 	list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
-		if (obj == NULL && rc == 0) {
+		if (!obj && rc == 0) {
 			obj = osc2cl(ext->oe_obj);
 			cl_object_get(obj);
 		}
@@ -1759,7 +1759,7 @@ static int brw_interpret(const struct lu_env *env,
 	LASSERT(list_empty(&aa->aa_exts));
 	LASSERT(list_empty(&aa->aa_oaps));
 
-	if (obj != NULL) {
+	if (obj) {
 		struct obdo *oa = aa->aa_oa;
 		struct cl_attr *attr  = &osc_env_info(env)->oti_attr;
 		unsigned long valid = 0;
@@ -1871,13 +1871,13 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	}
 
 	pga = kcalloc(page_count, sizeof(*pga), GFP_NOFS);
-	if (pga == NULL) {
+	if (!pga) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (oa == NULL) {
+	if (!oa) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1886,7 +1886,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	list_for_each_entry(oap, &rpc_list, oap_rpc_item) {
 		struct cl_page *page = oap2cl_page(oap);
 
-		if (clerq == NULL) {
+		if (!clerq) {
 			clerq = cl_req_alloc(env, page, crt,
 					     1 /* only 1-object rpcs for now */);
 			if (IS_ERR(clerq)) {
@@ -1907,7 +1907,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	}
 
 	/* always get the data for the obdo for the rpc */
-	LASSERT(clerq != NULL);
+	LASSERT(clerq);
 	crattr->cra_oa = oa;
 	cl_req_attr_set(env, clerq, crattr, ~0ULL);
 	if (lock) {
@@ -1959,7 +1959,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	tmp = NULL;
 	list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
 		/* only one oap gets a request reference */
-		if (tmp == NULL)
+		if (!tmp)
 			tmp = oap;
 		if (oap->oap_interrupted && !req->rq_intr) {
 			CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
@@ -1967,7 +1967,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 			ptlrpc_mark_interrupted(req);
 		}
 	}
-	if (tmp != NULL)
+	if (tmp)
 		tmp->oap_request = ptlrpc_request_addref(req);
 
 	client_obd_list_lock(&cli->cl_loi_list_lock);
@@ -2001,7 +2001,7 @@ out:
 	kfree(crattr);
 
 	if (rc != 0) {
-		LASSERT(req == NULL);
+		LASSERT(!req);
 
 		if (oa)
 			kmem_cache_free(obdo_cachep, oa);
@@ -2026,7 +2026,6 @@ static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
 	void *data = einfo->ei_cbdata;
 	int set = 0;
 
-	LASSERT(lock != NULL);
 	LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
 	LASSERT(lock->l_resource->lr_type == einfo->ei_type);
 	LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
@@ -2035,7 +2034,7 @@ static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
 	lock_res_and_lock(lock);
 	spin_lock(&osc_ast_guard);
 
-	if (lock->l_ast_data == NULL)
+	if (!lock->l_ast_data)
 		lock->l_ast_data = data;
 	if (lock->l_ast_data == data)
 		set = 1;
@@ -2052,7 +2051,7 @@ static int osc_set_data_with_check(struct lustre_handle *lockh,
 	struct ldlm_lock *lock = ldlm_handle2lock(lockh);
 	int set = 0;
 
-	if (lock != NULL) {
+	if (lock) {
 		set = osc_set_lock_data_with_check(lock, einfo);
 		LDLM_LOCK_PUT(lock);
 	} else
@@ -2095,7 +2094,6 @@ static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
 			rep = req_capsule_server_get(&req->rq_pill,
 						     &RMF_DLM_REP);
 
-			LASSERT(rep != NULL);
 			rep->lock_policy_res1 =
 				ptlrpc_status_ntoh(rep->lock_policy_res1);
 			if (rep->lock_policy_res1)
@@ -2170,7 +2168,7 @@ static int osc_enqueue_interpret(const struct lu_env *env,
 		 */
 		ldlm_lock_decref(&handle, mode);
 
-	LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
+	LASSERTF(lock, "lockh %p, req %p, aa %p - client evicted?\n",
 		 aa->oa_lockh, req, aa);
 	ldlm_lock_decref(&handle, mode);
 	LDLM_LOCK_PUT(lock);
@@ -2281,7 +2279,7 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
 
 		req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					   &RQF_LDLM_ENQUEUE_LVB);
-		if (req == NULL)
+		if (!req)
 			return -ENOMEM;
 
 		rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
@@ -2361,7 +2359,7 @@ int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
 	rc = ldlm_lock_match(obd->obd_namespace, lflags,
 			     res_id, type, policy, rc, lockh, unref);
 	if (rc) {
-		if (data != NULL) {
+		if (data) {
 			if (!osc_set_data_with_check(lockh, data)) {
 				if (!(lflags & LDLM_FL_TEST_LOCK))
 					ldlm_lock_decref(lockh, rc);
@@ -2411,7 +2409,7 @@ static int osc_statfs_interpret(const struct lu_env *env,
 		goto out;
 
 	msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
-	if (msfs == NULL) {
+	if (!msfs) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -2438,7 +2436,7 @@ static int osc_statfs_async(struct obd_export *exp,
 	 * is not so great if request processing is slow, while absolute
 	 * timestamps are not ideal because they need time synchronization. */
 	req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
@@ -2493,7 +2491,7 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
 
 	class_import_put(imp);
 
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
@@ -2516,7 +2514,7 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
 		goto out;
 
 	msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
-	if (msfs == NULL) {
+	if (!msfs) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -2701,7 +2699,7 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
 
 		req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					   &RQF_OST_GET_INFO_LAST_ID);
-		if (req == NULL)
+		if (!req)
 			return -ENOMEM;
 
 		req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
@@ -2722,7 +2720,7 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
 			goto out;
 
 		reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
-		if (reply == NULL) {
+		if (!reply) {
 			rc = -EPROTO;
 			goto out;
 		}
@@ -2775,7 +2773,7 @@ out:
 skip_locking:
 		req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					   &RQF_OST_GET_INFO_FIEMAP);
-		if (req == NULL) {
+		if (!req) {
 			rc = -ENOMEM;
 			goto drop_lock;
 		}
@@ -2804,7 +2802,7 @@ skip_locking:
 			goto fini_req;
 
 		reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
-		if (reply == NULL) {
+		if (!reply) {
 			rc = -EPROTO;
 			goto fini_req;
 		}
@@ -2853,7 +2851,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	if (KEY_IS(KEY_CACHE_SET)) {
 		struct client_obd *cli = &obd->u.cli;
 
-		LASSERT(cli->cl_cache == NULL); /* only once */
+		LASSERT(!cli->cl_cache); /* only once */
 		cli->cl_cache = val;
 		atomic_inc(&cli->cl_cache->ccc_users);
 		cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
@@ -2890,7 +2888,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
 						&RQF_OST_SET_GRANT_INFO :
 						&RQF_OBD_SET_INFO);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
@@ -2929,7 +2927,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 
 	ptlrpc_request_set_replen(req);
 	if (!KEY_IS(KEY_GRANT_SHRINK)) {
-		LASSERT(set != NULL);
+		LASSERT(set);
 		ptlrpc_set_add_req(set, req);
 		ptlrpc_check_set(NULL, set);
 	} else {
@@ -2947,7 +2945,7 @@ static int osc_reconnect(const struct lu_env *env,
 {
 	struct client_obd *cli = &obd->u.cli;
 
-	if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
+	if (data && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
 		long lost_grant;
 
 		client_obd_list_lock(&cli->cl_loi_list_lock);
@@ -2988,7 +2986,7 @@ static int osc_disconnect(struct obd_export *exp)
 	 * So the osc should be disconnected from the shrink list, after we
 	 * are sure the import has been destroyed. BUG18662
 	 */
-	if (obd->u.cli.cl_import == NULL)
+	if (!obd->u.cli.cl_import)
 		osc_del_shrink_grant(&obd->u.cli);
 	return rc;
 }
@@ -3213,7 +3211,7 @@ int osc_cleanup(struct obd_device *obd)
 	int rc;
 
 	/* lru cleanup */
-	if (cli->cl_cache != NULL) {
+	if (cli->cl_cache) {
 		LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
 		spin_lock(&cli->cl_cache->ccc_lru_lock);
 		list_del_init(&cli->cl_lru_osc);
-- 
2.1.0

[lustre-devel] [PATCH 25/45] staging/lustre/osc: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/osc/lproc_osc.c      |   4 +-
 drivers/staging/lustre/lustre/osc/osc_cache.c      | 120 ++++++++++---------
 .../staging/lustre/lustre/osc/osc_cl_internal.h    |   4 +-
 drivers/staging/lustre/lustre/osc/osc_dev.c        |   6 +-
 drivers/staging/lustre/lustre/osc/osc_io.c         |  19 ++-
 drivers/staging/lustre/lustre/osc/osc_lock.c       |  61 +++++-----
 drivers/staging/lustre/lustre/osc/osc_object.c     |   4 +-
 drivers/staging/lustre/lustre/osc/osc_page.c       |  22 ++--
 drivers/staging/lustre/lustre/osc/osc_quota.c      |  16 +--
 drivers/staging/lustre/lustre/osc/osc_request.c    | 130 ++++++++++-----------
 10 files changed, 189 insertions(+), 197 deletions(-)

diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
index b69ec0f..cb9edaf 100644
--- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
+++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c
@@ -381,7 +381,7 @@ static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 
 	DECLARE_CKSUM_NAME;
 
-	if (obd == NULL)
+	if (!obd)
 		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
@@ -406,7 +406,7 @@ static ssize_t osc_checksum_type_seq_write(struct file *file,
 	DECLARE_CKSUM_NAME;
 	char kernbuf[10];
 
-	if (obd == NULL)
+	if (!obd)
 		return 0;
 
 	if (count > sizeof(kernbuf) - 1)
diff --git a/drivers/staging/lustre/lustre/osc/osc_cache.c b/drivers/staging/lustre/lustre/osc/osc_cache.c
index 6b5f8d0..4704231 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cache.c
+++ b/drivers/staging/lustre/lustre/osc/osc_cache.c
@@ -140,7 +140,7 @@ static const char *oes_strings[] = {
 
 static inline struct osc_extent *rb_extent(struct rb_node *n)
 {
-	if (n == NULL)
+	if (!n)
 		return NULL;
 
 	return container_of(n, struct osc_extent, oe_node);
@@ -148,7 +148,7 @@ static inline struct osc_extent *rb_extent(struct rb_node *n)
 
 static inline struct osc_extent *next_extent(struct osc_extent *ext)
 {
-	if (ext == NULL)
+	if (!ext)
 		return NULL;
 
 	LASSERT(ext->oe_intree);
@@ -157,7 +157,7 @@ static inline struct osc_extent *next_extent(struct osc_extent *ext)
 
 static inline struct osc_extent *prev_extent(struct osc_extent *ext)
 {
-	if (ext == NULL)
+	if (!ext)
 		return NULL;
 
 	LASSERT(ext->oe_intree);
@@ -240,7 +240,7 @@ static int osc_extent_sanity_check0(struct osc_extent *ext,
 		goto out;
 	}
 
-	if (ext->oe_osclock == NULL && ext->oe_grants > 0) {
+	if (!ext->oe_osclock && ext->oe_grants > 0) {
 		rc = 90;
 		goto out;
 	}
@@ -319,7 +319,7 @@ static int osc_extent_is_overlapped(struct osc_object *obj,
 	if (!extent_debug)
 		return 0;
 
-	for (tmp = first_extent(obj); tmp != NULL; tmp = next_extent(tmp)) {
+	for (tmp = first_extent(obj); tmp; tmp = next_extent(tmp)) {
 		if (tmp == ext)
 			continue;
 		if (tmp->oe_end >= ext->oe_start &&
@@ -347,7 +347,7 @@ static struct osc_extent *osc_extent_alloc(struct osc_object *obj)
 	struct osc_extent *ext;
 
 	ext = kmem_cache_alloc(osc_extent_kmem, GFP_NOFS | __GFP_ZERO);
-	if (ext == NULL)
+	if (!ext)
 		return NULL;
 
 	RB_CLEAR_NODE(&ext->oe_node);
@@ -415,7 +415,7 @@ static struct osc_extent *osc_extent_search(struct osc_object *obj,
 	struct osc_extent *tmp, *p = NULL;
 
 	LASSERT(osc_object_is_locked(obj));
-	while (n != NULL) {
+	while (n) {
 		tmp = rb_extent(n);
 		if (index < tmp->oe_start) {
 			n = n->rb_left;
@@ -439,7 +439,7 @@ static struct osc_extent *osc_extent_lookup(struct osc_object *obj,
 	struct osc_extent *ext;
 
 	ext = osc_extent_search(obj, index);
-	if (ext != NULL && ext->oe_start <= index && index <= ext->oe_end)
+	if (ext && ext->oe_start <= index && index <= ext->oe_end)
 		return osc_extent_get(ext);
 	return NULL;
 }
@@ -454,7 +454,7 @@ static void osc_extent_insert(struct osc_object *obj, struct osc_extent *ext)
 	LASSERT(ext->oe_intree == 0);
 	LASSERT(ext->oe_obj == obj);
 	LASSERT(osc_object_is_locked(obj));
-	while (*n != NULL) {
+	while (*n) {
 		tmp = rb_extent(*n);
 		parent = *n;
 
@@ -533,7 +533,7 @@ static int osc_extent_merge(const struct lu_env *env, struct osc_extent *cur,
 
 	LASSERT(cur->oe_state == OES_CACHE);
 	LASSERT(osc_object_is_locked(obj));
-	if (victim == NULL)
+	if (!victim)
 		return -EINVAL;
 
 	if (victim->oe_state != OES_CACHE || victim->oe_fsync_wait)
@@ -639,11 +639,10 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
 	int rc;
 
 	cur = osc_extent_alloc(obj);
-	if (cur == NULL)
+	if (!cur)
 		return ERR_PTR(-ENOMEM);
 
 	lock = cl_lock_at_pgoff(env, osc2cl(obj), index, NULL, 1, 0);
-	LASSERT(lock != NULL);
 	LASSERT(lock->cll_descr.cld_mode >= CLM_WRITE);
 
 	LASSERT(cli->cl_chunkbits >= PAGE_CACHE_SHIFT);
@@ -678,9 +677,9 @@ static struct osc_extent *osc_extent_find(const struct lu_env *env,
 restart:
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, cur->oe_start);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
-	while (ext != NULL) {
+	while (ext) {
 		loff_t ext_chk_start = ext->oe_start >> ppc_bits;
 		loff_t ext_chk_end = ext->oe_end >> ppc_bits;
 
@@ -775,21 +774,21 @@ restart:
 
 			found = osc_extent_hold(ext);
 		}
-		if (found != NULL)
+		if (found)
 			break;
 
 		ext = next_extent(ext);
 	}
 
 	osc_extent_tree_dump(D_CACHE, obj);
-	if (found != NULL) {
-		LASSERT(conflict == NULL);
+	if (found) {
+		LASSERT(!conflict);
 		if (!IS_ERR(found)) {
 			LASSERT(found->oe_osclock == cur->oe_osclock);
 			OSC_EXTENT_DUMP(D_CACHE, found,
 					"found caching ext for %lu.\n", index);
 		}
-	} else if (conflict == NULL) {
+	} else if (!conflict) {
 		/* create a new extent */
 		EASSERT(osc_extent_is_overlapped(obj, cur) == 0, cur);
 		cur->oe_grants = chunksize + cli->cl_extent_tax;
@@ -804,8 +803,8 @@ restart:
 	}
 	osc_object_unlock(obj);
 
-	if (conflict != NULL) {
-		LASSERT(found == NULL);
+	if (conflict) {
+		LASSERT(!found);
 
 		/* waiting for IO to finish. Please notice that it's impossible
 		 * to be an OES_TRUNC extent. */
@@ -1074,13 +1073,13 @@ static int osc_extent_make_ready(const struct lu_env *env,
 	LASSERT(sanity_check(ext) == 0);
 	/* in locking state, any process should not touch this extent. */
 	EASSERT(ext->oe_state == OES_LOCKING, ext);
-	EASSERT(ext->oe_owner != NULL, ext);
+	EASSERT(ext->oe_owner, ext);
 
 	OSC_EXTENT_DUMP(D_CACHE, ext, "make ready\n");
 
 	list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
 		++page_count;
-		if (last == NULL || last->oap_obj_off < oap->oap_obj_off)
+		if (!last || last->oap_obj_off < oap->oap_obj_off)
 			last = oap;
 
 		/* checking ASYNC_READY is race safe */
@@ -1103,7 +1102,7 @@ static int osc_extent_make_ready(const struct lu_env *env,
 	}
 
 	LASSERT(page_count == ext->oe_nr_pages);
-	LASSERT(last != NULL);
+	LASSERT(last);
 	/* the last page is the only one we need to refresh its count by
 	 * the size of file. */
 	if (!(last->oap_async_flags & ASYNC_COUNT_STABLE)) {
@@ -1167,7 +1166,7 @@ static int osc_extent_expand(struct osc_extent *ext, pgoff_t index, int *grants)
 	end_index = min(ext->oe_max_end, ((chunk + 1) << ppc_bits) - 1);
 
 	next = next_extent(ext);
-	if (next != NULL && next->oe_start <= end_index) {
+	if (next && next->oe_start <= end_index) {
 		/* complex mode - overlapped with the next extent,
 		 * this case will be handled by osc_extent_find() */
 		rc = -EAGAIN;
@@ -1197,7 +1196,7 @@ static void osc_extent_tree_dump0(int level, struct osc_object *obj,
 
 	/* osc_object_lock(obj); */
 	cnt = 1;
-	for (ext = first_extent(obj); ext != NULL; ext = next_extent(ext))
+	for (ext = first_extent(obj); ext; ext = next_extent(ext))
 		OSC_EXTENT_DUMP(level, ext, "in tree %d.\n", cnt++);
 
 	cnt = 1;
@@ -1262,7 +1261,6 @@ static int osc_refresh_count(const struct lu_env *env,
 
 	/* readpage queues with _COUNT_STABLE, shouldn't get here. */
 	LASSERT(!(cmd & OBD_BRW_READ));
-	LASSERT(opg != NULL);
 	obj = opg->ops_cl.cpl_obj;
 
 	cl_object_attr_lock(obj);
@@ -1299,16 +1297,16 @@ static int osc_completion(const struct lu_env *env, struct osc_async_page *oap,
 	 * page->cp_req can be NULL if io submission failed before
 	 * cl_req was allocated.
 	 */
-	if (page->cp_req != NULL)
+	if (page->cp_req)
 		cl_req_page_done(env, page);
-	LASSERT(page->cp_req == NULL);
+	LASSERT(!page->cp_req);
 
 	crt = cmd == OBD_BRW_READ ? CRT_READ : CRT_WRITE;
 	/* Clear opg->ops_transfer_pinned before VM lock is released. */
 	opg->ops_transfer_pinned = 0;
 
 	spin_lock(&obj->oo_seatbelt);
-	LASSERT(opg->ops_submitter != NULL);
+	LASSERT(opg->ops_submitter);
 	LASSERT(!list_empty(&opg->ops_inflight));
 	list_del_init(&opg->ops_inflight);
 	opg->ops_submitter = NULL;
@@ -1650,7 +1648,7 @@ static int osc_makes_rpc(struct client_obd *cli, struct osc_object *osc,
 	 * by forcing them through rpcs that immediately fail and complete
 	 * the pages.  recovery relies on this to empty the queued pages
 	 * before canceling the locks and evicting down the llite pages */
-	if ((cli->cl_import == NULL || cli->cl_import->imp_invalid))
+	if (!cli->cl_import || cli->cl_import->imp_invalid)
 		invalid_import = 1;
 
 	if (cmd & OBD_BRW_WRITE) {
@@ -1788,7 +1786,7 @@ static void osc_ap_completion(const struct lu_env *env, struct client_obd *cli,
 	struct lov_oinfo *loi = osc->oo_oinfo;
 	__u64 xid = 0;
 
-	if (oap->oap_request != NULL) {
+	if (oap->oap_request) {
 		xid = ptlrpc_req_xid(oap->oap_request);
 		ptlrpc_req_finished(oap->oap_request);
 		oap->oap_request = NULL;
@@ -1906,7 +1904,7 @@ static int get_write_extents(struct osc_object *obj, struct list_head *rpclist)
 		while ((ext = next_extent(ext)) != NULL) {
 			if ((ext->oe_state != OES_CACHE) ||
 			    (!list_empty(&ext->oe_link) &&
-			     ext->oe_owner != NULL))
+			     ext->oe_owner))
 				continue;
 
 			if (!try_to_add_extent_for_io(cli, ext, rpclist,
@@ -1918,10 +1916,10 @@ static int get_write_extents(struct osc_object *obj, struct list_head *rpclist)
 		return page_count;
 
 	ext = first_extent(obj);
-	while (ext != NULL) {
+	while (ext) {
 		if ((ext->oe_state != OES_CACHE) ||
 		    /* this extent may be already in current rpclist */
-		    (!list_empty(&ext->oe_link) && ext->oe_owner != NULL)) {
+		    (!list_empty(&ext->oe_link) && ext->oe_owner)) {
 			ext = next_extent(ext);
 			continue;
 		}
@@ -1980,7 +1978,7 @@ osc_send_write_rpc(const struct lu_env *env, struct client_obd *cli,
 				continue;
 			}
 		}
-		if (first == NULL) {
+		if (!first) {
 			first = ext;
 			srvlock = ext->oe_srvlock;
 		} else {
@@ -2074,7 +2072,7 @@ static struct osc_object *osc_next_obj(struct client_obd *cli)
 
 	/* then return all queued objects when we have an invalid import
 	 * so that they get flushed */
-	if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
+	if (!cli->cl_import || cli->cl_import->imp_invalid) {
 		if (!list_empty(&cli->cl_loi_write_list))
 			return list_to_obj(&cli->cl_loi_write_list, write_item);
 		if (!list_empty(&cli->cl_loi_read_list))
@@ -2158,7 +2156,7 @@ static int osc_io_unplug0(const struct lu_env *env, struct client_obd *cli,
 {
 	int rc = 0;
 
-	if (osc != NULL && osc_list_maint(cli, osc) == 0)
+	if (osc && osc_list_maint(cli, osc) == 0)
 		return 0;
 
 	if (!async) {
@@ -2171,7 +2169,7 @@ static int osc_io_unplug0(const struct lu_env *env, struct client_obd *cli,
 		atomic_dec(&cli->cl_lru_shrinkers);
 	} else {
 		CDEBUG(D_CACHE, "Queue writeback work for client %p.\n", cli);
-		LASSERT(cli->cl_writeback_work != NULL);
+		LASSERT(cli->cl_writeback_work);
 		rc = ptlrpcd_queue_work(cli->cl_writeback_work);
 	}
 	return rc;
@@ -2236,7 +2234,7 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 	if (oap->oap_magic != OAP_MAGIC)
 		return -EINVAL;
 
-	if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
+	if (!cli->cl_import || cli->cl_import->imp_invalid)
 		return -EIO;
 
 	if (!list_empty(&oap->oap_pending_item) ||
@@ -2290,7 +2288,7 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 	 * 2. otherwise, a new extent will be allocated. */
 
 	ext = oio->oi_active;
-	if (ext != NULL && ext->oe_start <= index && ext->oe_max_end >= index) {
+	if (ext && ext->oe_start <= index && ext->oe_max_end >= index) {
 		/* one chunk plus extent overhead must be enough to write this
 		 * page */
 		grants = (1 << cli->cl_chunkbits) + cli->cl_extent_tax;
@@ -2319,7 +2317,7 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 			}
 		}
 		rc = 0;
-	} else if (ext != NULL) {
+	} else if (ext) {
 		/* index is located outside of active extent */
 		need_release = 1;
 	}
@@ -2329,11 +2327,11 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 		ext = NULL;
 	}
 
-	if (ext == NULL) {
+	if (!ext) {
 		int tmp = (1 << cli->cl_chunkbits) + cli->cl_extent_tax;
 
 		/* try to find new extent to cover this page */
-		LASSERT(oio->oi_active == NULL);
+		LASSERT(!oio->oi_active);
 		/* we may have allocated grant for this page if we failed
 		 * to expand the previous active extent. */
 		LASSERT(ergo(grants > 0, grants >= tmp));
@@ -2362,8 +2360,8 @@ int osc_queue_async_io(const struct lu_env *env, struct cl_io *io,
 			osc_unreserve_grant(cli, grants, tmp);
 	}
 
-	LASSERT(ergo(rc == 0, ext != NULL));
-	if (ext != NULL) {
+	LASSERT(ergo(rc == 0, ext));
+	if (ext) {
 		EASSERTF(ext->oe_end >= index && ext->oe_start <= index,
 			 ext, "index = %lu.\n", index);
 		LASSERT((oap->oap_brw_flags & OBD_BRW_FROM_GRANT) != 0);
@@ -2401,14 +2399,14 @@ int osc_teardown_async_page(const struct lu_env *env,
 		/* only truncated pages are allowed to be taken out.
 		 * See osc_extent_truncate() and osc_cache_truncate_start()
 		 * for details. */
-		if (ext != NULL && ext->oe_state != OES_TRUNC) {
+		if (ext && ext->oe_state != OES_TRUNC) {
 			OSC_EXTENT_DUMP(D_ERROR, ext, "trunc at %lu.\n",
 					oap2cl_page(oap)->cp_index);
 			rc = -EBUSY;
 		}
 	}
 	osc_object_unlock(obj);
-	if (ext != NULL)
+	if (ext)
 		osc_extent_put(env, ext);
 	return rc;
 }
@@ -2433,7 +2431,7 @@ int osc_flush_async_page(const struct lu_env *env, struct cl_io *io,
 
 	osc_object_lock(obj);
 	ext = osc_extent_lookup(obj, index);
-	if (ext == NULL) {
+	if (!ext) {
 		osc_extent_tree_dump(D_ERROR, obj);
 		LASSERTF(0, "page index %lu is NOT covered.\n", index);
 	}
@@ -2535,7 +2533,7 @@ int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops)
 			break;
 		}
 	}
-	if (found != NULL) {
+	if (found) {
 		list_del_init(&found->oe_link);
 		osc_update_pending(obj, cmd, -found->oe_nr_pages);
 		osc_object_unlock(obj);
@@ -2547,7 +2545,7 @@ int osc_cancel_async_page(const struct lu_env *env, struct osc_page *ops)
 		osc_object_unlock(obj);
 		/* ok, it's been put in an rpc. only one oap gets a request
 		 * reference */
-		if (oap->oap_request != NULL) {
+		if (oap->oap_request) {
 			ptlrpc_mark_interrupted(oap->oap_request);
 			ptlrpcd_wake(oap->oap_request);
 			ptlrpc_req_finished(oap->oap_request);
@@ -2582,7 +2580,7 @@ int osc_queue_sync_pages(const struct lu_env *env, struct osc_object *obj,
 	}
 
 	ext = osc_extent_alloc(obj);
-	if (ext == NULL) {
+	if (!ext) {
 		list_for_each_entry_safe(oap, tmp, list, oap_pending_item) {
 			list_del_init(&oap->oap_pending_item);
 			osc_ap_completion(env, cli, oap, 0, -ENOMEM);
@@ -2637,11 +2635,11 @@ int osc_cache_truncate_start(const struct lu_env *env, struct osc_io *oio,
 again:
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, index);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
 	else if (ext->oe_end < index)
 		ext = next_extent(ext);
-	while (ext != NULL) {
+	while (ext) {
 		EASSERT(ext->oe_state != OES_TRUNC, ext);
 
 		if (ext->oe_state > OES_CACHE || ext->oe_urgent) {
@@ -2714,14 +2712,14 @@ again:
 			/* we need to hold this extent in OES_TRUNC state so
 			 * that no writeback will happen. This is to avoid
 			 * BUG 17397. */
-			LASSERT(oio->oi_trunc == NULL);
+			LASSERT(!oio->oi_trunc);
 			oio->oi_trunc = osc_extent_get(ext);
 			OSC_EXTENT_DUMP(D_CACHE, ext,
 					"trunc at %llu\n", size);
 		}
 		osc_extent_put(env, ext);
 	}
-	if (waiting != NULL) {
+	if (waiting) {
 		int rc;
 
 		/* ignore the result of osc_extent_wait the write initiator
@@ -2746,7 +2744,7 @@ void osc_cache_truncate_end(const struct lu_env *env, struct osc_io *oio,
 	struct osc_extent *ext = oio->oi_trunc;
 
 	oio->oi_trunc = NULL;
-	if (ext != NULL) {
+	if (ext) {
 		bool unplug = false;
 
 		EASSERT(ext->oe_nr_pages > 0, ext);
@@ -2789,11 +2787,11 @@ int osc_cache_wait_range(const struct lu_env *env, struct osc_object *obj,
 again:
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, index);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
 	else if (ext->oe_end < index)
 		ext = next_extent(ext);
-	while (ext != NULL) {
+	while (ext) {
 		int rc;
 
 		if (ext->oe_start > end)
@@ -2844,11 +2842,11 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
 
 	osc_object_lock(obj);
 	ext = osc_extent_search(obj, start);
-	if (ext == NULL)
+	if (!ext)
 		ext = first_extent(obj);
 	else if (ext->oe_end < start)
 		ext = next_extent(ext);
-	while (ext != NULL) {
+	while (ext) {
 		if (ext->oe_start > end)
 			break;
 
@@ -2867,7 +2865,7 @@ int osc_cache_writeback_range(const struct lu_env *env, struct osc_object *obj,
 					ext->oe_urgent = 1;
 					list = &obj->oo_urgent_exts;
 				}
-				if (list != NULL)
+				if (list)
 					list_move_tail(&ext->oe_link, list);
 				unplug = true;
 			} else {
diff --git a/drivers/staging/lustre/lustre/osc/osc_cl_internal.h b/drivers/staging/lustre/lustre/osc/osc_cl_internal.h
index 415c27e..73d43ab 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cl_internal.h
+++ b/drivers/staging/lustre/lustre/osc/osc_cl_internal.h
@@ -472,7 +472,7 @@ static inline struct osc_thread_info *osc_env_info(const struct lu_env *env)
 	struct osc_thread_info *info;
 
 	info = lu_context_key_get(&env->le_ctx, &osc_key);
-	LASSERT(info != NULL);
+	LASSERT(info);
 	return info;
 }
 
@@ -481,7 +481,7 @@ static inline struct osc_session *osc_env_session(const struct lu_env *env)
 	struct osc_session *ses;
 
 	ses = lu_context_key_get(env->le_ses, &osc_session_key);
-	LASSERT(ses != NULL);
+	LASSERT(ses);
 	return ses;
 }
 
diff --git a/drivers/staging/lustre/lustre/osc/osc_dev.c b/drivers/staging/lustre/lustre/osc/osc_dev.c
index 7078cc5..67cb6e4 100644
--- a/drivers/staging/lustre/lustre/osc/osc_dev.c
+++ b/drivers/staging/lustre/lustre/osc/osc_dev.c
@@ -123,7 +123,7 @@ static void *osc_key_init(const struct lu_context *ctx,
 	struct osc_thread_info *info;
 
 	info = kmem_cache_alloc(osc_thread_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -148,7 +148,7 @@ static void *osc_session_init(const struct lu_context *ctx,
 	struct osc_session *info;
 
 	info = kmem_cache_alloc(osc_session_kmem, GFP_NOFS | __GFP_ZERO);
-	if (info == NULL)
+	if (!info)
 		info = ERR_PTR(-ENOMEM);
 	return info;
 }
@@ -228,7 +228,7 @@ static struct lu_device *osc_device_alloc(const struct lu_env *env,
 
 	/* Setup OSC OBD */
 	obd = class_name2obd(lustre_cfg_string(cfg, 0));
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	rc = osc_setup(obd, cfg);
 	if (rc) {
 		osc_device_free(env, d);
diff --git a/drivers/staging/lustre/lustre/osc/osc_io.c b/drivers/staging/lustre/lustre/osc/osc_io.c
index abd0beb..9dfcc26 100644
--- a/drivers/staging/lustre/lustre/osc/osc_io.c
+++ b/drivers/staging/lustre/lustre/osc/osc_io.c
@@ -73,7 +73,7 @@ static struct osc_page *osc_cl_page_osc(struct cl_page *page)
 	const struct cl_page_slice *slice;
 
 	slice = cl_page_at(page, &osc_device_type);
-	LASSERT(slice != NULL);
+	LASSERT(slice);
 
 	return cl2osc_page(slice);
 }
@@ -135,7 +135,7 @@ static int osc_io_submit(const struct lu_env *env,
 
 		/* Top level IO. */
 		io = page->cp_owner;
-		LASSERT(io != NULL);
+		LASSERT(io);
 
 		opg = osc_cl_page_osc(page);
 		oap = &opg->ops_oap;
@@ -266,7 +266,7 @@ static int osc_io_prepare_write(const struct lu_env *env,
 	 * This implements OBD_BRW_CHECK logic from old client.
 	 */
 
-	if (imp == NULL || imp->imp_invalid)
+	if (!imp || imp->imp_invalid)
 		result = -EIO;
 	if (result == 0 && oio->oi_lockless)
 		/* this page contains `invalid' data, but who cares?
@@ -349,7 +349,7 @@ static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
 	__u64 start = *(__u64 *)cbdata;
 
 	slice = cl_page_at(page, &osc_device_type);
-	LASSERT(slice != NULL);
+	LASSERT(slice);
 	ops = cl2osc_page(slice);
 	oap = &ops->ops_oap;
 
@@ -500,7 +500,7 @@ static void osc_io_setattr_end(const struct lu_env *env,
 		__u64 size = io->u.ci_setattr.sa_attr.lvb_size;
 
 		osc_trunc_check(env, io, oio, size);
-		if (oio->oi_trunc != NULL) {
+		if (oio->oi_trunc) {
 			osc_cache_truncate_end(env, oio, cl2osc(obj));
 			oio->oi_trunc = NULL;
 		}
@@ -754,7 +754,7 @@ static void osc_req_attr_set(const struct lu_env *env,
 		opg = osc_cl_page_osc(apage);
 		apage = opg->ops_cl.cpl_page; /* now apage is a sub-page */
 		lock = cl_lock_at_page(env, apage->cp_obj, apage, NULL, 1, 1);
-		if (lock == NULL) {
+		if (!lock) {
 			struct cl_object_header *head;
 			struct cl_lock *scan;
 
@@ -770,10 +770,9 @@ static void osc_req_attr_set(const struct lu_env *env,
 		}
 
 		olck = osc_lock_at(lock);
-		LASSERT(olck != NULL);
-		LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
+		LASSERT(ergo(opg->ops_srvlock, !olck->ols_lock));
 		/* check for lockless io. */
-		if (olck->ols_lock != NULL) {
+		if (olck->ols_lock) {
 			oa->o_handle = olck->ols_lock->l_remote_handle;
 			oa->o_valid |= OBD_MD_FLHANDLE;
 		}
@@ -804,7 +803,7 @@ int osc_req_init(const struct lu_env *env, struct cl_device *dev,
 	int result;
 
 	or = kmem_cache_alloc(osc_req_kmem, GFP_NOFS | __GFP_ZERO);
-	if (or != NULL) {
+	if (or) {
 		cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);
 		result = 0;
 	} else
diff --git a/drivers/staging/lustre/lustre/osc/osc_lock.c b/drivers/staging/lustre/lustre/osc/osc_lock.c
index 71f2810..cc9d7ea 100644
--- a/drivers/staging/lustre/lustre/osc/osc_lock.c
+++ b/drivers/staging/lustre/lustre/osc/osc_lock.c
@@ -79,7 +79,7 @@ static struct ldlm_lock *osc_handle_ptr(struct lustre_handle *handle)
 	struct ldlm_lock *lock;
 
 	lock = ldlm_handle2lock(handle);
-	if (lock != NULL)
+	if (lock)
 		LDLM_LOCK_PUT(lock);
 	return lock;
 }
@@ -94,42 +94,40 @@ static int osc_lock_invariant(struct osc_lock *ols)
 	int handle_used = lustre_handle_is_used(&ols->ols_handle);
 
 	if (ergo(osc_lock_is_lockless(ols),
-		 ols->ols_locklessable && ols->ols_lock == NULL))
+		 ols->ols_locklessable && !ols->ols_lock))
 		return 1;
 
 	/*
 	 * If all the following "ergo"s are true, return 1, otherwise 0
 	 */
-	if (!ergo(olock != NULL, handle_used))
+	if (!ergo(olock, handle_used))
 		return 0;
 
-	if (!ergo(olock != NULL,
-		   olock->l_handle.h_cookie == ols->ols_handle.cookie))
+	if (!ergo(olock, olock->l_handle.h_cookie == ols->ols_handle.cookie))
 		return 0;
 
 	if (!ergo(handle_used,
-		   ergo(lock != NULL && olock != NULL, lock == olock) &&
-		   ergo(lock == NULL, olock == NULL)))
+		  ergo(lock && olock, lock == olock) &&
+		  ergo(!lock, !olock)))
 		return 0;
 	/*
 	 * Check that ->ols_handle and ->ols_lock are consistent, but
 	 * take into account that they are set at the different time.
 	 */
 	if (!ergo(ols->ols_state == OLS_CANCELLED,
-		   olock == NULL && !handle_used))
+		  !olock && !handle_used))
 		return 0;
 	/*
 	 * DLM lock is destroyed only after we have seen cancellation
 	 * ast.
 	 */
-	if (!ergo(olock != NULL && ols->ols_state < OLS_CANCELLED,
-		   ((olock->l_flags & LDLM_FL_DESTROYED) == 0)))
+	if (!ergo(olock && ols->ols_state < OLS_CANCELLED,
+		  ((olock->l_flags & LDLM_FL_DESTROYED) == 0)))
 		return 0;
 
 	if (!ergo(ols->ols_state == OLS_GRANTED,
-		   olock != NULL &&
-		   olock->l_req_mode == olock->l_granted_mode &&
-		   ols->ols_hold))
+		  olock && olock->l_req_mode == olock->l_granted_mode &&
+		  ols->ols_hold))
 		return 0;
 	return 1;
 }
@@ -149,7 +147,7 @@ static void osc_lock_detach(const struct lu_env *env, struct osc_lock *olck)
 
 	spin_lock(&osc_ast_guard);
 	dlmlock = olck->ols_lock;
-	if (dlmlock == NULL) {
+	if (!dlmlock) {
 		spin_unlock(&osc_ast_guard);
 		return;
 	}
@@ -247,7 +245,7 @@ static void osc_lock_fini(const struct lu_env *env,
 	 * lock is destroyed immediately after upcall.
 	 */
 	osc_lock_unhold(ols);
-	LASSERT(ols->ols_lock == NULL);
+	LASSERT(!ols->ols_lock);
 	LASSERT(atomic_read(&ols->ols_pageref) == 0 ||
 		atomic_read(&ols->ols_pageref) == _PAGEREF_MAGIC);
 
@@ -292,7 +290,7 @@ static struct osc_lock *osc_ast_data_get(struct ldlm_lock *dlm_lock)
 	lock_res_and_lock(dlm_lock);
 	spin_lock(&osc_ast_guard);
 	olck = dlm_lock->l_ast_data;
-	if (olck != NULL) {
+	if (olck) {
 		struct cl_lock *lock = olck->ols_cl.cls_lock;
 		/*
 		 * If osc_lock holds a reference on ldlm lock, return it even
@@ -359,7 +357,6 @@ static void osc_lock_lvb_update(const struct lu_env *env, struct osc_lock *olck,
 		__u64 size;
 
 		dlmlock = olck->ols_lock;
-		LASSERT(dlmlock != NULL);
 
 		/* re-grab LVB from a dlm lock under DLM spin-locks. */
 		*lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
@@ -444,12 +441,12 @@ static void osc_lock_upcall0(const struct lu_env *env, struct osc_lock *olck)
 	struct ldlm_lock *dlmlock;
 
 	dlmlock = ldlm_handle2lock_long(&olck->ols_handle, 0);
-	LASSERT(dlmlock != NULL);
+	LASSERT(dlmlock);
 
 	lock_res_and_lock(dlmlock);
 	spin_lock(&osc_ast_guard);
 	LASSERT(dlmlock->l_ast_data == olck);
-	LASSERT(olck->ols_lock == NULL);
+	LASSERT(!olck->ols_lock);
 	olck->ols_lock = dlmlock;
 	spin_unlock(&osc_ast_guard);
 
@@ -508,10 +505,10 @@ static int osc_lock_upcall(void *cookie, int errcode)
 			struct ldlm_lock *dlmlock;
 
 			dlmlock = ldlm_handle2lock(&olck->ols_handle);
-			if (dlmlock != NULL) {
+			if (dlmlock) {
 				lock_res_and_lock(dlmlock);
 				spin_lock(&osc_ast_guard);
-				LASSERT(olck->ols_lock == NULL);
+				LASSERT(!olck->ols_lock);
 				dlmlock->l_ast_data = NULL;
 				olck->ols_handle.cookie = 0ULL;
 				spin_unlock(&osc_ast_guard);
@@ -634,7 +631,7 @@ static int osc_dlm_blocking_ast0(const struct lu_env *env,
 
 	cancel = 0;
 	olck = osc_ast_data_get(dlmlock);
-	if (olck != NULL) {
+	if (olck) {
 		lock = olck->ols_cl.cls_lock;
 		cl_lock_mutex_get(env, lock);
 		LINVRNT(osc_lock_invariant(olck));
@@ -786,17 +783,17 @@ static int osc_ldlm_completion_ast(struct ldlm_lock *dlmlock,
 	env = cl_env_nested_get(&nest);
 	if (!IS_ERR(env)) {
 		olck = osc_ast_data_get(dlmlock);
-		if (olck != NULL) {
+		if (olck) {
 			lock = olck->ols_cl.cls_lock;
 			cl_lock_mutex_get(env, lock);
 			/*
 			 * ldlm_handle_cp_callback() copied LVB from request
 			 * to lock->l_lvb_data, store it in osc_lock.
 			 */
-			LASSERT(dlmlock->l_lvb_data != NULL);
+			LASSERT(dlmlock->l_lvb_data);
 			lock_res_and_lock(dlmlock);
 			olck->ols_lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
-			if (olck->ols_lock == NULL) {
+			if (!olck->ols_lock) {
 				/*
 				 * upcall (osc_lock_upcall()) hasn't yet been
 				 * called. Do nothing now, upcall will bind
@@ -850,7 +847,7 @@ static int osc_ldlm_glimpse_ast(struct ldlm_lock *dlmlock, void *data)
 		 * environment.
 		 */
 		olck = osc_ast_data_get(dlmlock);
-		if (olck != NULL) {
+		if (olck) {
 			lock = olck->ols_cl.cls_lock;
 			/* Do not grab the mutex of cl_lock for glimpse.
 			 * See LU-1274 for details.
@@ -1074,7 +1071,7 @@ static int osc_lock_enqueue_wait(const struct lu_env *env,
 		} else {
 			CDEBUG(D_DLMTRACE, "lock %p is conflicted with %p, will wait\n",
 			       lock, conflict);
-			LASSERT(lock->cll_conflict == NULL);
+			LASSERT(!lock->cll_conflict);
 			lu_ref_add(&conflict->cll_reference, "cancel-wait",
 				   lock);
 			lock->cll_conflict = conflict;
@@ -1197,7 +1194,7 @@ static int osc_lock_wait(const struct lu_env *env,
 	}
 
 	LASSERT(equi(olck->ols_state >= OLS_UPCALL_RECEIVED &&
-		     lock->cll_error == 0, olck->ols_lock != NULL));
+		     lock->cll_error == 0, olck->ols_lock));
 
 	return lock->cll_error ?: olck->ols_state >= OLS_GRANTED ? 0 : CLO_WAIT;
 }
@@ -1306,7 +1303,7 @@ static void osc_lock_cancel(const struct lu_env *env,
 	LASSERT(cl_lock_is_mutexed(lock));
 	LINVRNT(osc_lock_invariant(olck));
 
-	if (dlmlock != NULL) {
+	if (dlmlock) {
 		int do_cancel;
 
 		discard = !!(dlmlock->l_flags & LDLM_FL_DISCARD_DATA);
@@ -1382,7 +1379,7 @@ static void osc_lock_state(const struct lu_env *env,
 	if (state == CLS_HELD && slice->cls_lock->cll_state != CLS_HELD) {
 		struct osc_io *oio = osc_env_io(env);
 
-		LASSERT(lock->ols_owner == NULL);
+		LASSERT(!lock->ols_owner);
 		lock->ols_owner = oio;
 	} else if (state != CLS_HELD)
 		lock->ols_owner = NULL;
@@ -1556,7 +1553,7 @@ int osc_lock_init(const struct lu_env *env,
 	int result;
 
 	clk = kmem_cache_alloc(osc_lock_kmem, GFP_NOFS | __GFP_ZERO);
-	if (clk != NULL) {
+	if (clk) {
 		__u32 enqflags = lock->cll_descr.cld_enq_flags;
 
 		osc_lock_build_einfo(env, lock, clk, &clk->ols_einfo);
@@ -1599,7 +1596,7 @@ int osc_dlm_lock_pageref(struct ldlm_lock *dlm)
 	 * doesn't matter because in the worst case we don't cancel a lock
 	 * which we actually can, that's no harm.
 	 */
-	if (olock != NULL &&
+	if (olock &&
 	    atomic_add_return(_PAGEREF_MAGIC,
 				  &olock->ols_pageref) != _PAGEREF_MAGIC) {
 		atomic_sub(_PAGEREF_MAGIC, &olock->ols_pageref);
diff --git a/drivers/staging/lustre/lustre/osc/osc_object.c b/drivers/staging/lustre/lustre/osc/osc_object.c
index fdd6219..60d8230 100644
--- a/drivers/staging/lustre/lustre/osc/osc_object.c
+++ b/drivers/staging/lustre/lustre/osc/osc_object.c
@@ -113,7 +113,7 @@ static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
 	LASSERT(list_empty(&osc->oo_write_item));
 	LASSERT(list_empty(&osc->oo_read_item));
 
-	LASSERT(osc->oo_root.rb_node == NULL);
+	LASSERT(!osc->oo_root.rb_node);
 	LASSERT(list_empty(&osc->oo_hp_exts));
 	LASSERT(list_empty(&osc->oo_urgent_exts));
 	LASSERT(list_empty(&osc->oo_rpc_exts));
@@ -256,7 +256,7 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
 	struct lu_object *obj;
 
 	osc = kmem_cache_alloc(osc_object_kmem, GFP_NOFS | __GFP_ZERO);
-	if (osc != NULL) {
+	if (osc) {
 		obj = osc2lu(osc);
 		lu_object_init(obj, NULL, dev);
 		osc->oo_cl.co_ops = &osc_ops;
diff --git a/drivers/staging/lustre/lustre/osc/osc_page.c b/drivers/staging/lustre/lustre/osc/osc_page.c
index 99d5b56..5cb0ccc 100644
--- a/drivers/staging/lustre/lustre/osc/osc_page.c
+++ b/drivers/staging/lustre/lustre/osc/osc_page.c
@@ -69,7 +69,7 @@ static void osc_page_fini(const struct lu_env *env,
 	struct osc_page *opg = cl2osc_page(slice);
 
 	CDEBUG(D_TRACE, "%p\n", opg);
-	LASSERT(opg->ops_lock == NULL);
+	LASSERT(!opg->ops_lock);
 }
 
 static void osc_page_transfer_get(struct osc_page *opg, const char *label)
@@ -135,7 +135,7 @@ static int osc_page_cache_add(const struct lu_env *env,
 	 * osc_io_end() is called, so release it earlier.
 	 * for mkwrite(), it's known there is no further pages. */
 	if (cl_io_is_sync_write(io) || cl_io_is_mkwrite(io)) {
-		if (oio->oi_active != NULL) {
+		if (oio->oi_active) {
 			osc_extent_release(env, oio->oi_active);
 			oio->oi_active = NULL;
 		}
@@ -159,7 +159,7 @@ static int osc_page_addref_lock(const struct lu_env *env,
 	struct osc_lock *olock;
 	int rc;
 
-	LASSERT(opg->ops_lock == NULL);
+	LASSERT(!opg->ops_lock);
 
 	olock = osc_lock_at(lock);
 	if (atomic_inc_return(&olock->ols_pageref) <= 0) {
@@ -179,7 +179,7 @@ static void osc_page_putref_lock(const struct lu_env *env,
 	struct cl_lock *lock = opg->ops_lock;
 	struct osc_lock *olock;
 
-	LASSERT(lock != NULL);
+	LASSERT(lock);
 	olock = osc_lock_at(lock);
 
 	atomic_dec(&olock->ols_pageref);
@@ -197,7 +197,7 @@ static int osc_page_is_under_lock(const struct lu_env *env,
 
 	lock = cl_lock_at_page(env, slice->cpl_obj, slice->cpl_page,
 			       NULL, 1, 0);
-	if (lock != NULL) {
+	if (lock) {
 		if (osc_page_addref_lock(env, cl2osc_page(slice), lock) == 0)
 			result = -EBUSY;
 		cl_lock_put(env, lock);
@@ -325,7 +325,7 @@ static void osc_page_delete(const struct lu_env *env,
 	}
 
 	spin_lock(&obj->oo_seatbelt);
-	if (opg->ops_submitter != NULL) {
+	if (opg->ops_submitter) {
 		LASSERT(!list_empty(&opg->ops_inflight));
 		list_del_init(&opg->ops_inflight);
 		opg->ops_submitter = NULL;
@@ -589,14 +589,14 @@ int osc_lru_shrink(struct client_obd *cli, int target)
 			continue;
 		}
 
-		LASSERT(page->cp_obj != NULL);
+		LASSERT(page->cp_obj);
 		if (clobj != page->cp_obj) {
 			struct cl_object *tmp = page->cp_obj;
 
 			cl_object_get(tmp);
 			client_obd_list_unlock(&cli->cl_lru_list_lock);
 
-			if (clobj != NULL) {
+			if (clobj) {
 				count -= discard_pagevec(env, io, pvec, index);
 				index = 0;
 
@@ -641,7 +641,7 @@ int osc_lru_shrink(struct client_obd *cli, int target)
 	}
 	client_obd_list_unlock(&cli->cl_lru_list_lock);
 
-	if (clobj != NULL) {
+	if (clobj) {
 		count -= discard_pagevec(env, io, pvec, index);
 
 		cl_io_fini(env, io);
@@ -720,7 +720,7 @@ static int osc_lru_reclaim(struct client_obd *cli)
 	int max_scans;
 	int rc;
 
-	LASSERT(cache != NULL);
+	LASSERT(cache);
 
 	rc = osc_lru_shrink(cli, lru_shrink_min);
 	if (rc != 0) {
@@ -776,7 +776,7 @@ static int osc_lru_reserve(const struct lu_env *env, struct osc_object *obj,
 	struct client_obd *cli = osc_cli(obj);
 	int rc = 0;
 
-	if (cli->cl_cache == NULL) /* shall not be in LRU */
+	if (!cli->cl_cache) /* shall not be in LRU */
 		return 0;
 
 	LASSERT(atomic_read(cli->cl_lru_left) >= 0);
diff --git a/drivers/staging/lustre/lustre/osc/osc_quota.c b/drivers/staging/lustre/lustre/osc/osc_quota.c
index e70e796..d6731c5 100644
--- a/drivers/staging/lustre/lustre/osc/osc_quota.c
+++ b/drivers/staging/lustre/lustre/osc/osc_quota.c
@@ -36,7 +36,7 @@ static inline struct osc_quota_info *osc_oqi_alloc(u32 id)
 	struct osc_quota_info *oqi;
 
 	oqi = kmem_cache_alloc(osc_quota_kmem, GFP_NOFS | __GFP_ZERO);
-	if (oqi != NULL)
+	if (oqi)
 		oqi->oqi_id = id;
 
 	return oqi;
@@ -90,11 +90,11 @@ int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
 		if ((flags & FL_QUOTA_FLAG(type)) != 0) {
 			/* This ID is getting close to its quota limit, let's
 			 * switch to sync I/O */
-			if (oqi != NULL)
+			if (oqi)
 				continue;
 
 			oqi = osc_oqi_alloc(qid[type]);
-			if (oqi == NULL) {
+			if (!oqi) {
 				rc = -ENOMEM;
 				break;
 			}
@@ -114,7 +114,7 @@ int osc_quota_setdq(struct client_obd *cli, const unsigned int qid[],
 		} else {
 			/* This ID is now off the hook, let's remove it from
 			 * the hash table */
-			if (oqi == NULL)
+			if (!oqi)
 				continue;
 
 			oqi = cfs_hash_del_key(cli->cl_quota_hash[type],
@@ -147,7 +147,7 @@ oqi_keycmp(const void *key, struct hlist_node *hnode)
 	struct osc_quota_info *oqi;
 	u32 uid;
 
-	LASSERT(key != NULL);
+	LASSERT(key);
 	uid = *((u32 *)key);
 	oqi = hlist_entry(hnode, struct osc_quota_info, oqi_hash);
 
@@ -218,7 +218,7 @@ int osc_quota_setup(struct obd_device *obd)
 							   CFS_HASH_MAX_THETA,
 							   &quota_hash_ops,
 							   CFS_HASH_DEFAULT);
-		if (cli->cl_quota_hash[type] == NULL)
+		if (!cli->cl_quota_hash[type])
 			break;
 	}
 
@@ -252,7 +252,7 @@ int osc_quotactl(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_OST_QUOTACTL, LUSTRE_OST_VERSION,
 					OST_QUOTACTL);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
@@ -294,7 +294,7 @@ int osc_quotacheck(struct obd_device *unused, struct obd_export *exp,
 	req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 					&RQF_OST_QUOTACHECK, LUSTRE_OST_VERSION,
 					OST_QUOTACHECK);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
diff --git a/drivers/staging/lustre/lustre/osc/osc_request.c b/drivers/staging/lustre/lustre/osc/osc_request.c
index 3ae00fc..23a11c4 100644
--- a/drivers/staging/lustre/lustre/osc/osc_request.c
+++ b/drivers/staging/lustre/lustre/osc/osc_request.c
@@ -113,18 +113,18 @@ static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
 	int lmm_size;
 
 	lmm_size = sizeof(**lmmp);
-	if (lmmp == NULL)
+	if (!lmmp)
 		return lmm_size;
 
-	if (*lmmp != NULL && lsm == NULL) {
+	if (*lmmp && !lsm) {
 		kfree(*lmmp);
 		*lmmp = NULL;
 		return 0;
-	} else if (unlikely(lsm != NULL && ostid_id(&lsm->lsm_oi) == 0)) {
+	} else if (unlikely(lsm && ostid_id(&lsm->lsm_oi) == 0)) {
 		return -EBADF;
 	}
 
-	if (*lmmp == NULL) {
+	if (!*lmmp) {
 		*lmmp = kzalloc(lmm_size, GFP_NOFS);
 		if (!*lmmp)
 			return -ENOMEM;
@@ -143,7 +143,7 @@ static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	int lsm_size;
 	struct obd_import *imp = class_exp2cliimp(exp);
 
-	if (lmm != NULL) {
+	if (lmm) {
 		if (lmm_bytes < sizeof(*lmm)) {
 			CERROR("%s: lov_mds_md too small: %d, need %d\n",
 			       exp->exp_obd->obd_name, lmm_bytes,
@@ -160,23 +160,23 @@ static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 	}
 
 	lsm_size = lov_stripe_md_size(1);
-	if (lsmp == NULL)
+	if (!lsmp)
 		return lsm_size;
 
-	if (*lsmp != NULL && lmm == NULL) {
+	if (*lsmp && !lmm) {
 		kfree((*lsmp)->lsm_oinfo[0]);
 		kfree(*lsmp);
 		*lsmp = NULL;
 		return 0;
 	}
 
-	if (*lsmp == NULL) {
+	if (!*lsmp) {
 		*lsmp = kzalloc(lsm_size, GFP_NOFS);
-		if (unlikely(*lsmp == NULL))
+		if (unlikely(!*lsmp))
 			return -ENOMEM;
 		(*lsmp)->lsm_oinfo[0] = kzalloc(sizeof(struct lov_oinfo),
 						GFP_NOFS);
-		if (unlikely((*lsmp)->lsm_oinfo[0] == NULL)) {
+		if (unlikely(!(*lsmp)->lsm_oinfo[0])) {
 			kfree(*lsmp);
 			return -ENOMEM;
 		}
@@ -185,11 +185,11 @@ static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
 		return -EBADF;
 	}
 
-	if (lmm != NULL)
+	if (lmm)
 		/* XXX zero *lsmp? */
 		ostid_le_to_cpu(&lmm->lmm_oi, &(*lsmp)->lsm_oi);
 
-	if (imp != NULL &&
+	if (imp &&
 	    (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
 		(*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
 	else
@@ -246,7 +246,7 @@ static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
@@ -276,7 +276,7 @@ static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
@@ -294,7 +294,7 @@ static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -321,7 +321,7 @@ static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
 	LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
@@ -339,7 +339,7 @@ static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -362,7 +362,7 @@ static int osc_setattr_interpret(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -384,7 +384,7 @@ int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
@@ -451,7 +451,7 @@ static int osc_real_create(struct obd_export *exp, struct obdo *oa,
 	}
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -482,7 +482,7 @@ static int osc_real_create(struct obd_export *exp, struct obdo *oa,
 		goto out_req;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EPROTO;
 		goto out_req;
 	}
@@ -500,7 +500,7 @@ static int osc_real_create(struct obd_export *exp, struct obdo *oa,
 	lsm->lsm_oi = oa->o_oi;
 	*ea = lsm;
 
-	if (oti != NULL) {
+	if (oti) {
 		oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
 
 		if (oa->o_valid & OBD_MD_FLCOOKIE) {
@@ -530,7 +530,7 @@ int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
@@ -573,7 +573,7 @@ static int osc_sync_interpret(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		CERROR("can't unpack ost_body\n");
 		rc = -EPROTO;
 		goto out;
@@ -595,7 +595,7 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
 	int rc;
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
@@ -650,7 +650,7 @@ static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
 
 	ostid_build_res_name(&oa->o_oi, &res_id);
 	res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
-	if (res == NULL)
+	if (!res)
 		return 0;
 
 	LDLM_RESOURCE_ADDREF(res);
@@ -743,7 +743,7 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
 					LDLM_FL_DISCARD_DATA);
 
 	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
-	if (req == NULL) {
+	if (!req) {
 		ldlm_lock_list_put(&cancels, l_bl_ast, count);
 		return -ENOMEM;
 	}
@@ -758,7 +758,7 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
 	req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
 	ptlrpc_at_set_req_timeout(req);
 
-	if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
+	if (oti && oa->o_valid & OBD_MD_FLCOOKIE)
 		oa->o_lcookie = *oti->oti_logcookies;
 	body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
 	LASSERT(body);
@@ -1106,7 +1106,7 @@ static int check_write_rcs(struct ptlrpc_request *req,
 	remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
 						  sizeof(*remote_rcs) *
 						  niocount);
-	if (remote_rcs == NULL) {
+	if (!remote_rcs) {
 		CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
 		return -EPROTO;
 	}
@@ -1244,7 +1244,7 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
 		opc = OST_READ;
 		req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
 	}
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	for (niocount = i = 1; i < page_count; i++) {
@@ -1274,7 +1274,7 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
 		opc == OST_WRITE ? BULK_GET_SOURCE : BULK_PUT_SINK,
 		OST_BULK_PORTAL);
 
-	if (desc == NULL) {
+	if (!desc) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1283,7 +1283,7 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,
 	body = req_capsule_client_get(pill, &RMF_OST_BODY);
 	ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
 	niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
-	LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
+	LASSERT(body && ioobj && niobuf);
 
 	lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 
@@ -1472,9 +1472,9 @@ static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
 		return rc;
 	}
 
-	LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
+	LASSERTF(req->rq_repmsg, "rc = %d\n", rc);
 	body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-	if (body == NULL) {
+	if (!body) {
 		DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
 		return -EPROTO;
 	}
@@ -1627,7 +1627,7 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
 		return rc;
 
 	list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
-		if (oap->oap_request != NULL) {
+		if (oap->oap_request) {
 			LASSERTF(request == oap->oap_request,
 				 "request %p != oap_request %p\n",
 				 request, oap->oap_request);
@@ -1709,7 +1709,7 @@ static void sort_brw_pages(struct brw_page **array, int num)
 
 static void osc_release_ppga(struct brw_page **ppga, u32 count)
 {
-	LASSERT(ppga != NULL);
+	LASSERT(ppga);
 	kfree(ppga);
 }
 
@@ -1748,7 +1748,7 @@ static int brw_interpret(const struct lu_env *env,
 	}
 
 	list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
-		if (obj == NULL && rc == 0) {
+		if (!obj && rc == 0) {
 			obj = osc2cl(ext->oe_obj);
 			cl_object_get(obj);
 		}
@@ -1759,7 +1759,7 @@ static int brw_interpret(const struct lu_env *env,
 	LASSERT(list_empty(&aa->aa_exts));
 	LASSERT(list_empty(&aa->aa_oaps));
 
-	if (obj != NULL) {
+	if (obj) {
 		struct obdo *oa = aa->aa_oa;
 		struct cl_attr *attr  = &osc_env_info(env)->oti_attr;
 		unsigned long valid = 0;
@@ -1871,13 +1871,13 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	}
 
 	pga = kcalloc(page_count, sizeof(*pga), GFP_NOFS);
-	if (pga == NULL) {
+	if (!pga) {
 		rc = -ENOMEM;
 		goto out;
 	}
 
 	oa = kmem_cache_alloc(obdo_cachep, GFP_NOFS | __GFP_ZERO);
-	if (oa == NULL) {
+	if (!oa) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1886,7 +1886,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	list_for_each_entry(oap, &rpc_list, oap_rpc_item) {
 		struct cl_page *page = oap2cl_page(oap);
 
-		if (clerq == NULL) {
+		if (!clerq) {
 			clerq = cl_req_alloc(env, page, crt,
 					     1 /* only 1-object rpcs for now */);
 			if (IS_ERR(clerq)) {
@@ -1907,7 +1907,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	}
 
 	/* always get the data for the obdo for the rpc */
-	LASSERT(clerq != NULL);
+	LASSERT(clerq);
 	crattr->cra_oa = oa;
 	cl_req_attr_set(env, clerq, crattr, ~0ULL);
 	if (lock) {
@@ -1959,7 +1959,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 	tmp = NULL;
 	list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
 		/* only one oap gets a request reference */
-		if (tmp == NULL)
+		if (!tmp)
 			tmp = oap;
 		if (oap->oap_interrupted && !req->rq_intr) {
 			CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
@@ -1967,7 +1967,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
 			ptlrpc_mark_interrupted(req);
 		}
 	}
-	if (tmp != NULL)
+	if (tmp)
 		tmp->oap_request = ptlrpc_request_addref(req);
 
 	client_obd_list_lock(&cli->cl_loi_list_lock);
@@ -2001,7 +2001,7 @@ out:
 	kfree(crattr);
 
 	if (rc != 0) {
-		LASSERT(req == NULL);
+		LASSERT(!req);
 
 		if (oa)
 			kmem_cache_free(obdo_cachep, oa);
@@ -2026,7 +2026,6 @@ static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
 	void *data = einfo->ei_cbdata;
 	int set = 0;
 
-	LASSERT(lock != NULL);
 	LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
 	LASSERT(lock->l_resource->lr_type == einfo->ei_type);
 	LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
@@ -2035,7 +2034,7 @@ static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
 	lock_res_and_lock(lock);
 	spin_lock(&osc_ast_guard);
 
-	if (lock->l_ast_data == NULL)
+	if (!lock->l_ast_data)
 		lock->l_ast_data = data;
 	if (lock->l_ast_data == data)
 		set = 1;
@@ -2052,7 +2051,7 @@ static int osc_set_data_with_check(struct lustre_handle *lockh,
 	struct ldlm_lock *lock = ldlm_handle2lock(lockh);
 	int set = 0;
 
-	if (lock != NULL) {
+	if (lock) {
 		set = osc_set_lock_data_with_check(lock, einfo);
 		LDLM_LOCK_PUT(lock);
 	} else
@@ -2095,7 +2094,6 @@ static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
 			rep = req_capsule_server_get(&req->rq_pill,
 						     &RMF_DLM_REP);
 
-			LASSERT(rep != NULL);
 			rep->lock_policy_res1 =
 				ptlrpc_status_ntoh(rep->lock_policy_res1);
 			if (rep->lock_policy_res1)
@@ -2170,7 +2168,7 @@ static int osc_enqueue_interpret(const struct lu_env *env,
 		 */
 		ldlm_lock_decref(&handle, mode);
 
-	LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
+	LASSERTF(lock, "lockh %p, req %p, aa %p - client evicted?\n",
 		 aa->oa_lockh, req, aa);
 	ldlm_lock_decref(&handle, mode);
 	LDLM_LOCK_PUT(lock);
@@ -2281,7 +2279,7 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
 
 		req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					   &RQF_LDLM_ENQUEUE_LVB);
-		if (req == NULL)
+		if (!req)
 			return -ENOMEM;
 
 		rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
@@ -2361,7 +2359,7 @@ int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
 	rc = ldlm_lock_match(obd->obd_namespace, lflags,
 			     res_id, type, policy, rc, lockh, unref);
 	if (rc) {
-		if (data != NULL) {
+		if (data) {
 			if (!osc_set_data_with_check(lockh, data)) {
 				if (!(lflags & LDLM_FL_TEST_LOCK))
 					ldlm_lock_decref(lockh, rc);
@@ -2411,7 +2409,7 @@ static int osc_statfs_interpret(const struct lu_env *env,
 		goto out;
 
 	msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
-	if (msfs == NULL) {
+	if (!msfs) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -2438,7 +2436,7 @@ static int osc_statfs_async(struct obd_export *exp,
 	 * is not so great if request processing is slow, while absolute
 	 * timestamps are not ideal because they need time synchronization. */
 	req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
@@ -2493,7 +2491,7 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
 
 	class_import_put(imp);
 
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
@@ -2516,7 +2514,7 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
 		goto out;
 
 	msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
-	if (msfs == NULL) {
+	if (!msfs) {
 		rc = -EPROTO;
 		goto out;
 	}
@@ -2701,7 +2699,7 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
 
 		req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					   &RQF_OST_GET_INFO_LAST_ID);
-		if (req == NULL)
+		if (!req)
 			return -ENOMEM;
 
 		req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
@@ -2722,7 +2720,7 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
 			goto out;
 
 		reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
-		if (reply == NULL) {
+		if (!reply) {
 			rc = -EPROTO;
 			goto out;
 		}
@@ -2775,7 +2773,7 @@ out:
 skip_locking:
 		req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 					   &RQF_OST_GET_INFO_FIEMAP);
-		if (req == NULL) {
+		if (!req) {
 			rc = -ENOMEM;
 			goto drop_lock;
 		}
@@ -2804,7 +2802,7 @@ skip_locking:
 			goto fini_req;
 
 		reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
-		if (reply == NULL) {
+		if (!reply) {
 			rc = -EPROTO;
 			goto fini_req;
 		}
@@ -2853,7 +2851,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	if (KEY_IS(KEY_CACHE_SET)) {
 		struct client_obd *cli = &obd->u.cli;
 
-		LASSERT(cli->cl_cache == NULL); /* only once */
+		LASSERT(!cli->cl_cache); /* only once */
 		cli->cl_cache = val;
 		atomic_inc(&cli->cl_cache->ccc_users);
 		cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
@@ -2890,7 +2888,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 	req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
 						&RQF_OST_SET_GRANT_INFO :
 						&RQF_OBD_SET_INFO);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
@@ -2929,7 +2927,7 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 
 	ptlrpc_request_set_replen(req);
 	if (!KEY_IS(KEY_GRANT_SHRINK)) {
-		LASSERT(set != NULL);
+		LASSERT(set);
 		ptlrpc_set_add_req(set, req);
 		ptlrpc_check_set(NULL, set);
 	} else {
@@ -2947,7 +2945,7 @@ static int osc_reconnect(const struct lu_env *env,
 {
 	struct client_obd *cli = &obd->u.cli;
 
-	if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
+	if (data && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
 		long lost_grant;
 
 		client_obd_list_lock(&cli->cl_loi_list_lock);
@@ -2988,7 +2986,7 @@ static int osc_disconnect(struct obd_export *exp)
 	 * So the osc should be disconnected from the shrink list, after we
 	 * are sure the import has been destroyed. BUG18662
 	 */
-	if (obd->u.cli.cl_import == NULL)
+	if (!obd->u.cli.cl_import)
 		osc_del_shrink_grant(&obd->u.cli);
 	return rc;
 }
@@ -3213,7 +3211,7 @@ int osc_cleanup(struct obd_device *obd)
 	int rc;
 
 	/* lru cleanup */
-	if (cli->cl_cache != NULL) {
+	if (cli->cl_cache) {
 		LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
 		spin_lock(&cli->cl_cache->ccc_lru_lock);
 		list_del_init(&cli->cl_lru_osc);
-- 
2.1.0

[PATCH 26/45] staging/lustre/ptlrpc: Adjust NULL comparison codestyle

[green]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/ptlrpc/client.c      | 75 +++++++++----------
 drivers/staging/lustre/lustre/ptlrpc/connection.c  |  2 +-
 drivers/staging/lustre/lustre/ptlrpc/events.c      |  2 +-
 drivers/staging/lustre/lustre/ptlrpc/import.c      |  9 ++-
 drivers/staging/lustre/lustre/ptlrpc/layout.c      | 26 +++----
 drivers/staging/lustre/lustre/ptlrpc/llog_client.c | 20 +++---
 drivers/staging/lustre/lustre/ptlrpc/llog_net.c    |  2 +-
 .../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c    | 31 ++++----
 drivers/staging/lustre/lustre/ptlrpc/niobuf.c      | 30 ++++----
 drivers/staging/lustre/lustre/ptlrpc/nrs.c         | 84 +++++++++++-----------
 drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c    |  6 +-
 .../staging/lustre/lustre/ptlrpc/pack_generic.c    | 14 ++--
 drivers/staging/lustre/lustre/ptlrpc/pinger.c      |  5 +-
 drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c     | 16 ++---
 drivers/staging/lustre/lustre/ptlrpc/recover.c     |  6 +-
 drivers/staging/lustre/lustre/ptlrpc/sec.c         | 54 +++++++-------
 drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c    | 12 ++--
 drivers/staging/lustre/lustre/ptlrpc/sec_config.c  | 24 +++----
 drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c   |  6 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_null.c    |  4 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_plain.c   | 16 ++---
 drivers/staging/lustre/lustre/ptlrpc/service.c     | 76 ++++++++++----------
 22 files changed, 244 insertions(+), 276 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c
index 1cc3c69..9b89068 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/client.c
@@ -145,7 +145,7 @@ struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp(struct ptlrpc_request *req,
 
 	LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
 	desc = ptlrpc_new_bulk(npages, max_brw, type, portal);
-	if (desc == NULL)
+	if (!desc)
 		return NULL;
 
 	desc->bd_import_generation = req->rq_import_generation;
@@ -171,7 +171,7 @@ void __ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
 			     struct page *page, int pageoffset, int len, int pin)
 {
 	LASSERT(desc->bd_iov_count < desc->bd_max_iov);
-	LASSERT(page != NULL);
+	LASSERT(page);
 	LASSERT(pageoffset >= 0);
 	LASSERT(len > 0);
 	LASSERT(pageoffset + len <= PAGE_CACHE_SIZE);
@@ -193,7 +193,6 @@ void __ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc, int unpin)
 {
 	int i;
 
-	LASSERT(desc != NULL);
 	LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */
 	LASSERT(desc->bd_md_count == 0);	 /* network hands off */
 	LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
@@ -412,7 +411,7 @@ int ptlrpc_request_cache_init(void)
 	request_cache = kmem_cache_create("ptlrpc_cache",
 					  sizeof(struct ptlrpc_request),
 					  0, SLAB_HWCACHE_ALIGN, NULL);
-	return request_cache == NULL ? -ENOMEM : 0;
+	return !request_cache ? -ENOMEM : 0;
 }
 
 void ptlrpc_request_cache_fini(void)
@@ -442,8 +441,6 @@ void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
 	struct list_head *l, *tmp;
 	struct ptlrpc_request *req;
 
-	LASSERT(pool != NULL);
-
 	spin_lock(&pool->prp_lock);
 	list_for_each_safe(l, tmp, &pool->prp_req_list) {
 		req = list_entry(l, struct ptlrpc_request, rq_list);
@@ -753,7 +750,7 @@ ptlrpc_request_alloc_internal(struct obd_import *imp,
 	struct ptlrpc_request *request;
 
 	request = __ptlrpc_request_alloc(imp, pool);
-	if (request == NULL)
+	if (!request)
 		return NULL;
 
 	req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
@@ -952,10 +949,10 @@ void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
 	atomic_inc(&set->set_remaining);
 	req->rq_queued_time = cfs_time_current();
 
-	if (req->rq_reqmsg != NULL)
+	if (req->rq_reqmsg)
 		lustre_msg_set_jobid(req->rq_reqmsg, NULL);
 
-	if (set->set_producer != NULL)
+	if (set->set_producer)
 		/*
 		 * If the request set has a producer callback, the RPC must be
 		 * sent straight away
@@ -975,7 +972,7 @@ void ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
 	struct ptlrpc_request_set *set = pc->pc_set;
 	int count, i;
 
-	LASSERT(req->rq_set == NULL);
+	LASSERT(!req->rq_set);
 	LASSERT(test_bit(LIOD_STOP, &pc->pc_flags) == 0);
 
 	spin_lock(&set->set_new_req_lock);
@@ -1016,7 +1013,6 @@ static int ptlrpc_import_delay_req(struct obd_import *imp,
 {
 	int delay = 0;
 
-	LASSERT(status != NULL);
 	*status = 0;
 
 	if (req->rq_ctx_init || req->rq_ctx_fini) {
@@ -1079,7 +1075,7 @@ static int ptlrpc_console_allow(struct ptlrpc_request *req)
 	__u32 opc;
 	int err;
 
-	LASSERT(req->rq_reqmsg != NULL);
+	LASSERT(req->rq_reqmsg);
 	opc = lustre_msg_get_opc(req->rq_reqmsg);
 
 	/*
@@ -1168,7 +1164,7 @@ static int after_reply(struct ptlrpc_request *req)
 	struct timespec64 work_start;
 	long timediff;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	/* repbuf must be unlinked */
 	LASSERT(!req->rq_receiving_reply && !req->rq_reply_unlink);
 
@@ -1248,7 +1244,7 @@ static int after_reply(struct ptlrpc_request *req)
 	ktime_get_real_ts64(&work_start);
 	timediff = (work_start.tv_sec - req->rq_arrival_time.tv_sec) * USEC_PER_SEC +
 		   (work_start.tv_nsec - req->rq_arrival_time.tv_nsec) / NSEC_PER_USEC;
-	if (obd->obd_svc_stats != NULL) {
+	if (obd->obd_svc_stats) {
 		lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
 				    timediff);
 		ptlrpc_lprocfs_rpc_sent(req, timediff);
@@ -1311,7 +1307,7 @@ static int after_reply(struct ptlrpc_request *req)
 			/* version recovery */
 			ptlrpc_save_versions(req);
 			ptlrpc_retain_replayable_request(req, imp);
-		} else if (req->rq_commit_cb != NULL &&
+		} else if (req->rq_commit_cb &&
 			   list_empty(&req->rq_replay_list)) {
 			/*
 			 * NB: don't call rq_commit_cb if it's already on
@@ -1438,7 +1434,7 @@ static inline int ptlrpc_set_producer(struct ptlrpc_request_set *set)
 {
 	int remaining, rc;
 
-	LASSERT(set->set_producer != NULL);
+	LASSERT(set->set_producer);
 
 	remaining = atomic_read(&set->set_remaining);
 
@@ -1751,7 +1747,7 @@ int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set)
 			 * process the reply. Similarly if the RPC returned
 			 * an error, and therefore the bulk will never arrive.
 			 */
-			if (req->rq_bulk == NULL || req->rq_status < 0) {
+			if (!req->rq_bulk || req->rq_status < 0) {
 				ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
 				goto interpret;
 			}
@@ -1803,7 +1799,7 @@ interpret:
 		}
 		ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
 
-		CDEBUG(req->rq_reqmsg != NULL ? D_RPCTRACE : 0,
+		CDEBUG(req->rq_reqmsg ? D_RPCTRACE : 0,
 		       "Completed RPC pname:cluuid:pid:xid:nid:opc %s:%s:%d:%llu:%s:%d\n",
 		       current_comm(), imp->imp_obd->obd_uuid.uuid,
 		       lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
@@ -1883,7 +1879,7 @@ int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
 		      "timed out for sent delay" : "timed out for slow reply"),
 		  (s64)req->rq_sent, (s64)req->rq_real_sent);
 
-	if (imp != NULL && obd_debug_peer_on_timeout)
+	if (imp && obd_debug_peer_on_timeout)
 		LNetDebugPeer(imp->imp_connection->c_peer);
 
 	ptlrpc_unregister_reply(req, async_unlink);
@@ -1892,7 +1888,7 @@ int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
 	if (obd_dump_on_timeout)
 		libcfs_debug_dumplog();
 
-	if (imp == NULL) {
+	if (!imp) {
 		DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
 		return 1;
 	}
@@ -1945,8 +1941,6 @@ int ptlrpc_expired_set(void *data)
 	struct list_head *tmp;
 	time64_t now = ktime_get_real_seconds();
 
-	LASSERT(set != NULL);
-
 	/* A timeout expired. See which reqs it applies to...  */
 	list_for_each(tmp, &set->set_requests) {
 		struct ptlrpc_request *req =
@@ -2003,7 +1997,6 @@ void ptlrpc_interrupted_set(void *data)
 	struct ptlrpc_request_set *set = data;
 	struct list_head *tmp;
 
-	LASSERT(set != NULL);
 	CDEBUG(D_RPCTRACE, "INTERRUPTED SET %p\n", set);
 
 	list_for_each(tmp, &set->set_requests) {
@@ -2175,7 +2168,7 @@ int ptlrpc_set_wait(struct ptlrpc_request_set *set)
 			rc = req->rq_status;
 	}
 
-	if (set->set_interpret != NULL) {
+	if (set->set_interpret) {
 		int (*interpreter)(struct ptlrpc_request_set *set, void *, int) =
 			set->set_interpret;
 		rc = interpreter(set, set->set_arg, rc);
@@ -2207,10 +2200,10 @@ EXPORT_SYMBOL(ptlrpc_set_wait);
  */
 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
 {
-	if (request == NULL)
+	if (!request)
 		return;
 	LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
-	LASSERTF(request->rq_rqbd == NULL, "req %p\n", request);/* client-side */
+	LASSERTF(!request->rq_rqbd, "req %p\n", request);/* client-side */
 	LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
 	LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
 	LASSERTF(list_empty(&request->rq_exp_list), "req %p\n", request);
@@ -2222,7 +2215,7 @@ static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
 	 * We must take it off the imp_replay_list first.  Otherwise, we'll set
 	 * request->rq_reqmsg to NULL while osc_close is dereferencing it.
 	 */
-	if (request->rq_import != NULL) {
+	if (request->rq_import) {
 		if (!locked)
 			spin_lock(&request->rq_import->imp_lock);
 		list_del_init(&request->rq_replay_list);
@@ -2237,20 +2230,20 @@ static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
 		LBUG();
 	}
 
-	if (request->rq_repbuf != NULL)
+	if (request->rq_repbuf)
 		sptlrpc_cli_free_repbuf(request);
-	if (request->rq_export != NULL) {
+	if (request->rq_export) {
 		class_export_put(request->rq_export);
 		request->rq_export = NULL;
 	}
-	if (request->rq_import != NULL) {
+	if (request->rq_import) {
 		class_import_put(request->rq_import);
 		request->rq_import = NULL;
 	}
-	if (request->rq_bulk != NULL)
+	if (request->rq_bulk)
 		ptlrpc_free_bulk_pin(request->rq_bulk);
 
-	if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
+	if (request->rq_reqbuf || request->rq_clrbuf)
 		sptlrpc_cli_free_reqbuf(request);
 
 	if (request->rq_cli_ctx)
@@ -2270,7 +2263,7 @@ static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
  */
 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
 {
-	if (request == NULL)
+	if (!request)
 		return 1;
 
 	if (request == LP_POISON ||
@@ -2352,7 +2345,7 @@ int ptlrpc_unregister_reply(struct ptlrpc_request *request, int async)
 	 * a chance to run reply_in_callback(), and to make sure we've
 	 * unlinked before returning a req to the pool.
 	 */
-	if (request->rq_set != NULL)
+	if (request->rq_set)
 		wq = &request->rq_set->set_waitq;
 	else
 		wq = &request->rq_reply_waitq;
@@ -2387,7 +2380,7 @@ static void ptlrpc_free_request(struct ptlrpc_request *req)
 	req->rq_replay = 0;
 	spin_unlock(&req->rq_lock);
 
-	if (req->rq_commit_cb != NULL)
+	if (req->rq_commit_cb)
 		req->rq_commit_cb(req);
 	list_del_init(&req->rq_replay_list);
 
@@ -2428,7 +2421,6 @@ void ptlrpc_free_committed(struct obd_import *imp)
 	struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
 	bool skip_committed_list = true;
 
-	LASSERT(imp != NULL);
 	assert_spin_locked(&imp->imp_lock);
 
 	if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
@@ -2612,11 +2604,11 @@ int ptlrpc_queue_wait(struct ptlrpc_request *req)
 	struct ptlrpc_request_set *set;
 	int rc;
 
-	LASSERT(req->rq_set == NULL);
+	LASSERT(!req->rq_set);
 	LASSERT(!req->rq_receiving_reply);
 
 	set = ptlrpc_prep_set();
-	if (set == NULL) {
+	if (!set) {
 		CERROR("Unable to allocate ptlrpc set.");
 		return -ENOMEM;
 	}
@@ -2848,8 +2840,6 @@ void ptlrpc_abort_set(struct ptlrpc_request_set *set)
 {
 	struct list_head *tmp, *pos;
 
-	LASSERT(set != NULL);
-
 	list_for_each_safe(pos, tmp, &set->set_requests) {
 		struct ptlrpc_request *req =
 			list_entry(pos, struct ptlrpc_request,
@@ -2995,7 +2985,6 @@ static int work_interpreter(const struct lu_env *env,
 	struct ptlrpc_work_async_args *arg = data;
 
 	LASSERT(ptlrpcd_check_work(req));
-	LASSERT(arg->cb != NULL);
 
 	rc = arg->cb(env, arg->cbdata);
 
@@ -3027,12 +3016,12 @@ void *ptlrpcd_alloc_work(struct obd_import *imp,
 
 	might_sleep();
 
-	if (cb == NULL)
+	if (!cb)
 		return ERR_PTR(-EINVAL);
 
 	/* copy some code from deprecated fakereq. */
 	req = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (req == NULL) {
+	if (!req) {
 		CERROR("ptlrpc: run out of memory!\n");
 		return ERR_PTR(-ENOMEM);
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/connection.c b/drivers/staging/lustre/lustre/ptlrpc/connection.c
index da1f0b1..062db13 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/connection.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/connection.c
@@ -172,7 +172,7 @@ conn_keycmp(const void *key, struct hlist_node *hnode)
 	struct ptlrpc_connection *conn;
 	const lnet_process_id_t *conn_key;
 
-	LASSERT(key != NULL);
+	LASSERT(key);
 	conn_key = key;
 	conn = hlist_entry(hnode, struct ptlrpc_connection, c_hash);
 
diff --git a/drivers/staging/lustre/lustre/ptlrpc/events.c b/drivers/staging/lustre/lustre/ptlrpc/events.c
index 07e76a2..64eaa0e 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/events.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/events.c
@@ -312,7 +312,7 @@ void request_in_callback(lnet_event_t *ev)
 			return;
 		}
 		req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
-		if (req == NULL) {
+		if (!req) {
 			CERROR("Can't allocate incoming request descriptor: Dropping %s RPC from %s\n",
 			       service->srv_name,
 			       libcfs_id2str(ev->initiator));
diff --git a/drivers/staging/lustre/lustre/ptlrpc/import.c b/drivers/staging/lustre/lustre/ptlrpc/import.c
index f752c78..bd0fa3c 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/import.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/import.c
@@ -553,7 +553,6 @@ static int import_select_connection(struct obd_import *imp)
 	imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
 
 	dlmexp = class_conn2export(&imp->imp_dlm_handle);
-	LASSERT(dlmexp != NULL);
 	ptlrpc_connection_put(dlmexp->exp_connection);
 	dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
 	class_export_put(dlmexp);
@@ -687,7 +686,7 @@ int ptlrpc_connect_import(struct obd_import *imp)
 		goto out;
 
 	request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
-	if (request == NULL) {
+	if (!request) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -817,7 +816,7 @@ static int ptlrpc_connect_interpret(const struct lu_env *env,
 	ocd = req_capsule_server_sized_get(&request->rq_pill,
 					   &RMF_CONNECT_DATA, ret);
 
-	if (ocd == NULL) {
+	if (!ocd) {
 		CERROR("%s: no connect data from server\n",
 		       imp->imp_obd->obd_name);
 		rc = -EPROTO;
@@ -1162,7 +1161,7 @@ out:
 			struct obd_connect_data *ocd;
 
 			/* reply message might not be ready */
-			if (request->rq_repmsg == NULL)
+			if (!request->rq_repmsg)
 				return -EPROTO;
 
 			ocd = req_capsule_server_get(&request->rq_pill,
@@ -1243,7 +1242,7 @@ static int signal_completed_replay(struct obd_import *imp)
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
 					OBD_PING);
-	if (req == NULL) {
+	if (!req) {
 		atomic_dec(&imp->imp_replay_inflight);
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/layout.c b/drivers/staging/lustre/lustre/ptlrpc/layout.c
index c0e613c..9601b2a 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/layout.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/layout.c
@@ -1712,7 +1712,7 @@ void req_capsule_init(struct req_capsule *pill,
 	 * high-priority RPC queue getting peeked at before ost_handle()
 	 * handles an OST RPC.
 	 */
-	if (req != NULL && pill == &req->rq_pill && req->rq_pill_init)
+	if (req && pill == &req->rq_pill && req->rq_pill_init)
 		return;
 
 	memset(pill, 0, sizeof(*pill));
@@ -1720,7 +1720,7 @@ void req_capsule_init(struct req_capsule *pill,
 	pill->rc_loc = location;
 	req_capsule_init_area(pill);
 
-	if (req != NULL && pill == &req->rq_pill)
+	if (req && pill == &req->rq_pill)
 		req->rq_pill_init = 1;
 }
 EXPORT_SYMBOL(req_capsule_init);
@@ -1752,7 +1752,7 @@ static struct lustre_msg *__req_msg(const struct req_capsule *pill,
  */
 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
 {
-	LASSERT(pill->rc_fmt == NULL || pill->rc_fmt == fmt);
+	LASSERT(!pill->rc_fmt || pill->rc_fmt == fmt);
 	LASSERT(__req_format_is_sane(fmt));
 
 	pill->rc_fmt = fmt;
@@ -1773,8 +1773,6 @@ int req_capsule_filled_sizes(struct req_capsule *pill,
 	const struct req_format *fmt = pill->rc_fmt;
 	int i;
 
-	LASSERT(fmt != NULL);
-
 	for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
 		if (pill->rc_area[loc][i] == -1) {
 			pill->rc_area[loc][i] =
@@ -1810,7 +1808,7 @@ int req_capsule_server_pack(struct req_capsule *pill)
 
 	LASSERT(pill->rc_loc == RCL_SERVER);
 	fmt = pill->rc_fmt;
-	LASSERT(fmt != NULL);
+	LASSERT(fmt);
 
 	count = req_capsule_filled_sizes(pill, RCL_SERVER);
 	rc = lustre_pack_reply(pill->rc_req, count,
@@ -1865,7 +1863,7 @@ swabber_dumper_helper(struct req_capsule *pill,
 	swabber = swabber ?: field->rmf_swabber;
 
 	if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
-	    swabber != NULL && value != NULL)
+	    swabber && value)
 		do_swab = 1;
 	else
 		do_swab = 0;
@@ -1947,17 +1945,15 @@ static void *__req_capsule_get(struct req_capsule *pill,
 		[RCL_SERVER] = "server"
 	};
 
-	LASSERT(pill != NULL);
-	LASSERT(pill != LP_POISON);
 	fmt = pill->rc_fmt;
-	LASSERT(fmt != NULL);
+	LASSERT(fmt);
 	LASSERT(fmt != LP_POISON);
 	LASSERT(__req_format_is_sane(fmt));
 
 	offset = __req_capsule_offset(pill, field, loc);
 
 	msg = __req_msg(pill, loc);
-	LASSERT(msg != NULL);
+	LASSERT(msg);
 
 	getter = (field->rmf_flags & RMF_F_STRING) ?
 		(typeof(getter))lustre_msg_string : lustre_msg_buf;
@@ -1980,7 +1976,7 @@ static void *__req_capsule_get(struct req_capsule *pill,
 	}
 	value = getter(msg, offset, len);
 
-	if (value == NULL) {
+	if (!value) {
 		DEBUG_REQ(D_ERROR, pill->rc_req,
 			  "Wrong buffer for field `%s' (%d of %d) in format `%s': %d vs. %d (%s)\n",
 			  field->rmf_name, offset, lustre_msg_bufcount(msg),
@@ -2209,7 +2205,7 @@ void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
 
 	const struct req_format *old;
 
-	LASSERT(pill->rc_fmt != NULL);
+	LASSERT(pill->rc_fmt);
 	LASSERT(__req_format_is_sane(fmt));
 
 	old = pill->rc_fmt;
@@ -2222,7 +2218,7 @@ void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
 			const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
 
 			/* "opaque" fields can be transmogrified */
-			if (ofield->rmf_swabber == NULL &&
+			if (!ofield->rmf_swabber &&
 			    (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
 			    (ofield->rmf_size == -1 ||
 			    ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
@@ -2289,7 +2285,7 @@ void req_capsule_shrink(struct req_capsule *pill,
 	int offset;
 
 	fmt = pill->rc_fmt;
-	LASSERT(fmt != NULL);
+	LASSERT(fmt);
 	LASSERT(__req_format_is_sane(fmt));
 	LASSERT(req_capsule_has_field(pill, field, loc));
 	LASSERT(req_capsule_field_present(pill, field, loc));
diff --git a/drivers/staging/lustre/lustre/ptlrpc/llog_client.c b/drivers/staging/lustre/lustre/ptlrpc/llog_client.c
index e877020..8ef5e45 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/llog_client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/llog_client.c
@@ -93,7 +93,7 @@ static int llog_client_open(const struct lu_env *env,
 	LASSERT(lgh);
 
 	req = ptlrpc_request_alloc(imp, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -130,7 +130,7 @@ static int llog_client_open(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
@@ -158,7 +158,7 @@ static int llog_client_next_block(const struct lu_env *env,
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 					LUSTRE_LOG_VERSION,
 					LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}
@@ -179,14 +179,14 @@ static int llog_client_next_block(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	/* The log records are swabbed as they are processed */
 	ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
-	if (ptr == NULL) {
+	if (!ptr) {
 		rc = -EFAULT;
 		goto out;
 	}
@@ -216,7 +216,7 @@ static int llog_client_prev_block(const struct lu_env *env,
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 					LUSTRE_LOG_VERSION,
 					LLOG_ORIGIN_HANDLE_PREV_BLOCK);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}
@@ -236,13 +236,13 @@ static int llog_client_prev_block(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
-	if (ptr == NULL) {
+	if (!ptr) {
 		rc = -EFAULT;
 		goto out;
 	}
@@ -269,7 +269,7 @@ static int llog_client_read_header(const struct lu_env *env,
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 					LUSTRE_LOG_VERSION,
 					LLOG_ORIGIN_HANDLE_READ_HEADER);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}
@@ -285,7 +285,7 @@ static int llog_client_read_header(const struct lu_env *env,
 		goto out;
 
 	hdr = req_capsule_server_get(&req->rq_pill, &RMF_LLOG_LOG_HDR);
-	if (hdr == NULL) {
+	if (!hdr) {
 		rc = -EFAULT;
 		goto out;
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/llog_net.c b/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
index dac66f5..fbccb62 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
@@ -58,7 +58,7 @@ int llog_initiator_connect(struct llog_ctxt *ctxt)
 
 	LASSERT(ctxt);
 	new_imp = ctxt->loc_obd->u.cli.cl_import;
-	LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == new_imp,
+	LASSERTF(!ctxt->loc_imp || ctxt->loc_imp == new_imp,
 		 "%p - %p\n", ctxt->loc_imp, new_imp);
 	mutex_lock(&ctxt->loc_mutex);
 	if (ctxt->loc_imp != new_imp) {
diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
index cc55b79..a4a857f 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
@@ -192,15 +192,15 @@ ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 	unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 					  LPROCFS_CNTR_STDDEV;
 
-	LASSERT(*debugfs_root_ret == NULL);
-	LASSERT(*stats_ret == NULL);
+	LASSERT(!*debugfs_root_ret);
+	LASSERT(!*stats_ret);
 
 	svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,
 					0);
-	if (svc_stats == NULL)
+	if (!svc_stats)
 		return;
 
-	if (dir != NULL) {
+	if (dir) {
 		svc_debugfs_entry = ldebugfs_register(dir, root, NULL, NULL);
 		if (IS_ERR(svc_debugfs_entry)) {
 			lprocfs_free_stats(&svc_stats);
@@ -246,11 +246,11 @@ ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 
 	rc = ldebugfs_register_stats(svc_debugfs_entry, name, svc_stats);
 	if (rc < 0) {
-		if (dir != NULL)
+		if (dir)
 			ldebugfs_remove(&svc_debugfs_entry);
 		lprocfs_free_stats(&svc_stats);
 	} else {
-		if (dir != NULL)
+		if (dir)
 			*debugfs_root_ret = svc_debugfs_entry;
 		*stats_ret = svc_stats;
 	}
@@ -456,8 +456,6 @@ static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 static void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 				struct ptlrpc_nrs_pol_info *info)
 {
-	LASSERT(policy != NULL);
-	LASSERT(info != NULL);
 	assert_spin_locked(&policy->pol_nrs->nrs_lock);
 
 	memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
@@ -508,7 +506,7 @@ static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 	spin_unlock(&nrs->nrs_lock);
 
 	infos = kcalloc(num_pols, sizeof(*infos), GFP_NOFS);
-	if (infos == NULL) {
+	if (!infos) {
 		rc = -ENOMEM;
 		goto unlock;
 	}
@@ -676,7 +674,7 @@ static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
 	/**
 	 * No [reg|hp] token has been specified
 	 */
-	if (cmd == NULL)
+	if (!cmd)
 		goto default_queue;
 
 	/**
@@ -733,8 +731,7 @@ ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 	struct list_head *e;
 	struct ptlrpc_request *req;
 
-	if (srhi->srhi_req != NULL &&
-	    srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
+	if (srhi->srhi_req && srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 	    srhi->srhi_seq <= seq) {
 		/* If srhi_req was set previously, hasn't been culled and
 		 * we're searching for a seq on or after it (i.e. more
@@ -927,7 +924,7 @@ static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 			   (s64)req->rq_arrival_time.tv_sec,
 			   (long)(req->rq_sent - req->rq_arrival_time.tv_sec),
 			   (long)(req->rq_sent - req->rq_deadline));
-		if (svc->srv_ops.so_req_printer == NULL)
+		if (!svc->srv_ops.so_req_printer)
 			seq_putc(s, '\n');
 		else
 			svc->srv_ops.so_req_printer(s, srhi->srhi_req);
@@ -1103,7 +1100,7 @@ void ptlrpc_ldebugfs_register_service(struct dentry *entry,
 				 "stats", &svc->srv_debugfs_entry,
 				 &svc->srv_stats);
 
-	if (svc->srv_debugfs_entry == NULL)
+	if (IS_ERR_OR_NULL(svc->srv_debugfs_entry))
 		return;
 
 	ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
@@ -1129,7 +1126,7 @@ void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
 	int opc = opcode_offset(op);
 
 	svc_stats = req->rq_import->imp_obd->obd_svc_stats;
-	if (svc_stats == NULL || opc <= 0)
+	if (!svc_stats || opc <= 0)
 		return;
 	LASSERT(opc < LUSTRE_MAX_OPCODES);
 	if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
@@ -1166,7 +1163,7 @@ EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
 
 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
 {
-	if (svc->srv_debugfs_entry != NULL)
+	if (!IS_ERR_OR_NULL(svc->srv_debugfs_entry))
 		ldebugfs_remove(&svc->srv_debugfs_entry);
 
 	if (svc->srv_stats)
@@ -1198,7 +1195,7 @@ int lprocfs_wr_ping(struct file *file, const char __user *buffer,
 
 	req = ptlrpc_prep_ping(obd->u.cli.cl_import);
 	up_read(&obd->u.cli.cl_sem);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req->rq_send_state = LUSTRE_IMP_FULL;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c
index c5d7ff5..4cce26d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c
@@ -56,7 +56,6 @@ static int ptl_send_buf(lnet_handle_md_t *mdh, void *base, int len,
 	lnet_md_t md;
 
 	LASSERT(portal != 0);
-	LASSERT(conn != NULL);
 	CDEBUG(D_INFO, "conn=%p id %s\n", conn, libcfs_id2str(conn->c_peer));
 	md.start = base;
 	md.length = len;
@@ -130,7 +129,7 @@ static int ptlrpc_register_bulk(struct ptlrpc_request *req)
 	LASSERT(desc->bd_md_count == 0);
 	LASSERT(desc->bd_md_max_brw <= PTLRPC_BULK_OPS_COUNT);
 	LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
-	LASSERT(desc->bd_req != NULL);
+	LASSERT(desc->bd_req);
 	LASSERT(desc->bd_type == BULK_PUT_SINK ||
 		desc->bd_type == BULK_GET_SOURCE);
 
@@ -273,7 +272,7 @@ int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async)
 	if (async)
 		return 0;
 
-	if (req->rq_set != NULL)
+	if (req->rq_set)
 		wq = &req->rq_set->set_waitq;
 	else
 		wq = &req->rq_reply_waitq;
@@ -305,8 +304,7 @@ static void ptlrpc_at_set_reply(struct ptlrpc_request *req, int flags)
 				 req->rq_arrival_time.tv_sec, 1);
 
 	if (!(flags & PTLRPC_REPLY_EARLY) &&
-	    (req->rq_type != PTL_RPC_MSG_ERR) &&
-	    (req->rq_reqmsg != NULL) &&
+	    (req->rq_type != PTL_RPC_MSG_ERR) && req->rq_reqmsg &&
 	    !(lustre_msg_get_flags(req->rq_reqmsg) &
 	      (MSG_RESENT | MSG_REPLAY |
 	       MSG_REQ_REPLAY_DONE | MSG_LOCK_REPLAY_DONE))) {
@@ -360,10 +358,10 @@ int ptlrpc_send_reply(struct ptlrpc_request *req, int flags)
 	 * target_queue_final_reply().
 	 */
 	LASSERT(req->rq_no_reply == 0);
-	LASSERT(req->rq_reqbuf != NULL);
-	LASSERT(rs != NULL);
+	LASSERT(req->rq_reqbuf);
+	LASSERT(rs);
 	LASSERT((flags & PTLRPC_REPLY_MAYBE_DIFFICULT) || !rs->rs_difficult);
-	LASSERT(req->rq_repmsg != NULL);
+	LASSERT(req->rq_repmsg);
 	LASSERT(req->rq_repmsg == rs->rs_msg);
 	LASSERT(rs->rs_cb_id.cbid_fn == reply_out_callback);
 	LASSERT(rs->rs_cb_id.cbid_arg == rs);
@@ -403,12 +401,12 @@ int ptlrpc_send_reply(struct ptlrpc_request *req, int flags)
 
 	ptlrpc_at_set_reply(req, flags);
 
-	if (req->rq_export == NULL || req->rq_export->exp_connection == NULL)
+	if (!req->rq_export || !req->rq_export->exp_connection)
 		conn = ptlrpc_connection_get(req->rq_peer, req->rq_self, NULL);
 	else
 		conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
 
-	if (unlikely(conn == NULL)) {
+	if (unlikely(!conn)) {
 		CERROR("not replying on NULL connection\n"); /* bug 9635 */
 		return -ENOTCONN;
 	}
@@ -503,7 +501,7 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 	LASSERT(!((lustre_msg_get_flags(request->rq_reqmsg) & MSG_REPLAY) &&
 		(request->rq_import->imp_state == LUSTRE_IMP_FULL)));
 
-	if (unlikely(obd != NULL && obd->obd_fail)) {
+	if (unlikely(obd && obd->obd_fail)) {
 		CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
 			obd->obd_name);
 		/* this prevents us from waiting in ptlrpc_queue_wait */
@@ -535,7 +533,7 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 		goto out;
 
 	/* bulk register should be done after wrap_request() */
-	if (request->rq_bulk != NULL) {
+	if (request->rq_bulk) {
 		rc = ptlrpc_register_bulk(request);
 		if (rc != 0)
 			goto out;
@@ -543,9 +541,9 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 
 	if (!noreply) {
 		LASSERT(request->rq_replen != 0);
-		if (request->rq_repbuf == NULL) {
-			LASSERT(request->rq_repdata == NULL);
-			LASSERT(request->rq_repmsg == NULL);
+		if (!request->rq_repbuf) {
+			LASSERT(!request->rq_repdata);
+			LASSERT(!request->rq_repmsg);
 			rc = sptlrpc_cli_alloc_repbuf(request,
 						      request->rq_replen);
 			if (rc) {
@@ -623,7 +621,7 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 
 	/* add references on request for request_out_callback */
 	ptlrpc_request_addref(request);
-	if (obd != NULL && obd->obd_svc_stats != NULL)
+	if (obd && obd->obd_svc_stats)
 		lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
 			atomic_read(&request->rq_import->imp_inflight));
 
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs.c b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
index 57acf8c..ed40be6 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
@@ -57,7 +57,7 @@ struct nrs_core nrs_core;
 
 static int nrs_policy_init(struct ptlrpc_nrs_policy *policy)
 {
-	return policy->pol_desc->pd_ops->op_policy_init != NULL ?
+	return policy->pol_desc->pd_ops->op_policy_init ?
 	       policy->pol_desc->pd_ops->op_policy_init(policy) : 0;
 }
 
@@ -66,7 +66,7 @@ static void nrs_policy_fini(struct ptlrpc_nrs_policy *policy)
 	LASSERT(policy->pol_ref == 0);
 	LASSERT(policy->pol_req_queued == 0);
 
-	if (policy->pol_desc->pd_ops->op_policy_fini != NULL)
+	if (policy->pol_desc->pd_ops->op_policy_fini)
 		policy->pol_desc->pd_ops->op_policy_fini(policy);
 }
 
@@ -82,7 +82,7 @@ static int nrs_policy_ctl_locked(struct ptlrpc_nrs_policy *policy,
 	if (policy->pol_state == NRS_POL_STATE_STOPPED)
 		return -ENODEV;
 
-	return policy->pol_desc->pd_ops->op_policy_ctl != NULL ?
+	return policy->pol_desc->pd_ops->op_policy_ctl ?
 	       policy->pol_desc->pd_ops->op_policy_ctl(policy, opc, arg) :
 	       -ENOSYS;
 }
@@ -91,7 +91,7 @@ static void nrs_policy_stop0(struct ptlrpc_nrs_policy *policy)
 {
 	struct ptlrpc_nrs *nrs = policy->pol_nrs;
 
-	if (policy->pol_desc->pd_ops->op_policy_stop != NULL) {
+	if (policy->pol_desc->pd_ops->op_policy_stop) {
 		spin_unlock(&nrs->nrs_lock);
 
 		policy->pol_desc->pd_ops->op_policy_stop(policy);
@@ -154,7 +154,7 @@ static void nrs_policy_stop_primary(struct ptlrpc_nrs *nrs)
 {
 	struct ptlrpc_nrs_policy *tmp = nrs->nrs_policy_primary;
 
-	if (tmp == NULL)
+	if (!tmp)
 		return;
 
 	nrs->nrs_policy_primary = NULL;
@@ -220,12 +220,12 @@ static int nrs_policy_start_locked(struct ptlrpc_nrs_policy *policy)
 		 * nrs_policy_flags::PTLRPC_NRS_FL_FALLBACK flag set can
 		 * register with NRS core.
 		 */
-		LASSERT(nrs->nrs_policy_fallback == NULL);
+		LASSERT(!nrs->nrs_policy_fallback);
 	} else {
 		/**
 		 * Shouldn't start primary policy if w/o fallback policy.
 		 */
-		if (nrs->nrs_policy_fallback == NULL)
+		if (!nrs->nrs_policy_fallback)
 			return -EPERM;
 
 		if (policy->pol_state == NRS_POL_STATE_STARTED)
@@ -348,10 +348,10 @@ static void nrs_resource_put(struct ptlrpc_nrs_resource *res)
 {
 	struct ptlrpc_nrs_policy *policy = res->res_policy;
 
-	if (policy->pol_desc->pd_ops->op_res_put != NULL) {
+	if (policy->pol_desc->pd_ops->op_res_put) {
 		struct ptlrpc_nrs_resource *parent;
 
-		for (; res != NULL; res = parent) {
+		for (; res; res = parent) {
 			parent = res->res_parent;
 			policy->pol_desc->pd_ops->op_res_put(policy, res);
 		}
@@ -390,12 +390,11 @@ struct ptlrpc_nrs_resource *nrs_resource_get(struct ptlrpc_nrs_policy *policy,
 		rc = policy->pol_desc->pd_ops->op_res_get(policy, nrq, res,
 							  &tmp, moving_req);
 		if (rc < 0) {
-			if (res != NULL)
+			if (res)
 				nrs_resource_put(res);
 			return NULL;
 		}
 
-		LASSERT(tmp != NULL);
 		tmp->res_parent = res;
 		tmp->res_policy = policy;
 		res = tmp;
@@ -445,7 +444,7 @@ static void nrs_resource_get_safe(struct ptlrpc_nrs *nrs,
 	nrs_policy_get_locked(fallback);
 
 	primary = nrs->nrs_policy_primary;
-	if (primary != NULL)
+	if (primary)
 		nrs_policy_get_locked(primary);
 
 	spin_unlock(&nrs->nrs_lock);
@@ -454,9 +453,9 @@ static void nrs_resource_get_safe(struct ptlrpc_nrs *nrs,
 	 * Obtain resource hierarchy references.
 	 */
 	resp[NRS_RES_FALLBACK] = nrs_resource_get(fallback, nrq, moving_req);
-	LASSERT(resp[NRS_RES_FALLBACK] != NULL);
+	LASSERT(resp[NRS_RES_FALLBACK]);
 
-	if (primary != NULL) {
+	if (primary) {
 		resp[NRS_RES_PRIMARY] = nrs_resource_get(primary, nrq,
 							 moving_req);
 		/**
@@ -465,7 +464,7 @@ static void nrs_resource_get_safe(struct ptlrpc_nrs *nrs,
 		 * reference on the policy as it will not be used for this
 		 * request.
 		 */
-		if (resp[NRS_RES_PRIMARY] == NULL)
+		if (!resp[NRS_RES_PRIMARY])
 			nrs_policy_put(primary);
 	}
 }
@@ -485,7 +484,7 @@ static void nrs_resource_put_safe(struct ptlrpc_nrs_resource **resp)
 	int i;
 
 	for (i = 0; i < NRS_RES_MAX; i++) {
-		if (resp[i] != NULL) {
+		if (resp[i]) {
 			pols[i] = resp[i]->res_policy;
 			nrs_resource_put(resp[i]);
 			resp[i] = NULL;
@@ -526,7 +525,7 @@ struct ptlrpc_nrs_request *nrs_request_get(struct ptlrpc_nrs_policy *policy,
 
 	nrq = policy->pol_desc->pd_ops->op_req_get(policy, peek, force);
 
-	LASSERT(ergo(nrq != NULL, nrs_request_policy(nrq) == policy));
+	LASSERT(ergo(nrq, nrs_request_policy(nrq) == policy));
 
 	return nrq;
 }
@@ -552,7 +551,7 @@ static inline void nrs_request_enqueue(struct ptlrpc_nrs_request *nrq)
 	 * the preferred choice.
 	 */
 	for (i = NRS_RES_MAX - 1; i >= 0; i--) {
-		if (nrq->nr_res_ptrs[i] == NULL)
+		if (!nrq->nr_res_ptrs[i])
 			continue;
 
 		nrq->nr_res_idx = i;
@@ -622,7 +621,7 @@ static int nrs_policy_ctl(struct ptlrpc_nrs *nrs, char *name,
 	spin_lock(&nrs->nrs_lock);
 
 	policy = nrs_policy_find_locked(nrs, name);
-	if (policy == NULL) {
+	if (!policy) {
 		rc = -ENOENT;
 		goto out;
 	}
@@ -644,7 +643,7 @@ static int nrs_policy_ctl(struct ptlrpc_nrs *nrs, char *name,
 		break;
 	}
 out:
-	if (policy != NULL)
+	if (policy)
 		nrs_policy_put_locked(policy);
 
 	spin_unlock(&nrs->nrs_lock);
@@ -669,7 +668,7 @@ static int nrs_policy_unregister(struct ptlrpc_nrs *nrs, char *name)
 	spin_lock(&nrs->nrs_lock);
 
 	policy = nrs_policy_find_locked(nrs, name);
-	if (policy == NULL) {
+	if (!policy) {
 		spin_unlock(&nrs->nrs_lock);
 
 		CERROR("Can't find NRS policy %s\n", name);
@@ -702,7 +701,7 @@ static int nrs_policy_unregister(struct ptlrpc_nrs *nrs, char *name)
 
 	nrs_policy_fini(policy);
 
-	LASSERT(policy->pol_private == NULL);
+	LASSERT(!policy->pol_private);
 	kfree(policy);
 
 	return 0;
@@ -726,18 +725,16 @@ static int nrs_policy_register(struct ptlrpc_nrs *nrs,
 	struct ptlrpc_service_part *svcpt = nrs->nrs_svcpt;
 	int rc;
 
-	LASSERT(svcpt != NULL);
-	LASSERT(desc->pd_ops != NULL);
-	LASSERT(desc->pd_ops->op_res_get != NULL);
-	LASSERT(desc->pd_ops->op_req_get != NULL);
-	LASSERT(desc->pd_ops->op_req_enqueue != NULL);
-	LASSERT(desc->pd_ops->op_req_dequeue != NULL);
-	LASSERT(desc->pd_compat != NULL);
+	LASSERT(desc->pd_ops->op_res_get);
+	LASSERT(desc->pd_ops->op_req_get);
+	LASSERT(desc->pd_ops->op_req_enqueue);
+	LASSERT(desc->pd_ops->op_req_dequeue);
+	LASSERT(desc->pd_compat);
 
 	policy = kzalloc_node(sizeof(*policy), GFP_NOFS,
 			cfs_cpt_spread_node(svcpt->scp_service->srv_cptable,
 					    svcpt->scp_cpt));
-	if (policy == NULL)
+	if (!policy)
 		return -ENOMEM;
 
 	policy->pol_nrs = nrs;
@@ -757,7 +754,7 @@ static int nrs_policy_register(struct ptlrpc_nrs *nrs,
 	spin_lock(&nrs->nrs_lock);
 
 	tmp = nrs_policy_find_locked(nrs, policy->pol_desc->pd_name);
-	if (tmp != NULL) {
+	if (tmp) {
 		CERROR("NRS policy %s has been registered, can't register it for %s\n",
 		       policy->pol_desc->pd_name,
 		       svcpt->scp_service->srv_name);
@@ -947,14 +944,14 @@ static int nrs_svcpt_setup_locked(struct ptlrpc_service_part *svcpt)
 	/**
 	 * Optionally allocate a high-priority NRS head.
 	 */
-	if (svcpt->scp_service->srv_ops.so_hpreq_handler == NULL)
+	if (!svcpt->scp_service->srv_ops.so_hpreq_handler)
 		goto out;
 
 	svcpt->scp_nrs_hp =
 		kzalloc_node(sizeof(*svcpt->scp_nrs_hp), GFP_NOFS,
 			cfs_cpt_spread_node(svcpt->scp_service->srv_cptable,
 					    svcpt->scp_cpt));
-	if (svcpt->scp_nrs_hp == NULL) {
+	if (!svcpt->scp_nrs_hp) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1079,7 +1076,7 @@ again:
 			}
 		}
 
-		if (desc->pd_ops->op_lprocfs_fini != NULL)
+		if (desc->pd_ops->op_lprocfs_fini)
 			desc->pd_ops->op_lprocfs_fini(svc);
 	}
 
@@ -1107,13 +1104,12 @@ static int ptlrpc_nrs_policy_register(struct ptlrpc_nrs_pol_conf *conf)
 	struct ptlrpc_nrs_pol_desc *desc;
 	int rc = 0;
 
-	LASSERT(conf != NULL);
-	LASSERT(conf->nc_ops != NULL);
-	LASSERT(conf->nc_compat != NULL);
+	LASSERT(conf->nc_ops);
+	LASSERT(conf->nc_compat);
 	LASSERT(ergo(conf->nc_compat == nrs_policy_compat_one,
-		conf->nc_compat_svc_name != NULL));
+		conf->nc_compat_svc_name));
 	LASSERT(ergo((conf->nc_flags & PTLRPC_NRS_FL_REG_EXTERN) != 0,
-		     conf->nc_owner != NULL));
+		     conf->nc_owner));
 
 	conf->nc_name[NRS_POL_NAME_MAX - 1] = '\0';
 
@@ -1136,7 +1132,7 @@ static int ptlrpc_nrs_policy_register(struct ptlrpc_nrs_pol_conf *conf)
 
 	mutex_lock(&nrs_core.nrs_mutex);
 
-	if (nrs_policy_find_desc_locked(conf->nc_name) != NULL) {
+	if (nrs_policy_find_desc_locked(conf->nc_name)) {
 		CERROR("NRS: failing to register policy %s which has already been registered with NRS core!\n",
 		       conf->nc_name);
 		rc = -EEXIST;
@@ -1214,7 +1210,7 @@ again:
 		 * No need to take a reference to other modules here, as we
 		 * will be calling from the module's init() function.
 		 */
-		if (desc->pd_ops->op_lprocfs_init != NULL) {
+		if (desc->pd_ops->op_lprocfs_init) {
 			rc = desc->pd_ops->op_lprocfs_init(svc);
 			if (rc != 0) {
 				rc2 = nrs_policy_unregister_locked(desc);
@@ -1278,7 +1274,7 @@ int ptlrpc_service_nrs_setup(struct ptlrpc_service *svc)
 		if (!nrs_policy_compatible(svc, desc))
 			continue;
 
-		if (desc->pd_ops->op_lprocfs_init != NULL) {
+		if (desc->pd_ops->op_lprocfs_init) {
 			rc = desc->pd_ops->op_lprocfs_init(svc);
 			if (rc != 0)
 				goto failed;
@@ -1319,7 +1315,7 @@ void ptlrpc_service_nrs_cleanup(struct ptlrpc_service *svc)
 		if (!nrs_policy_compatible(svc, desc))
 			continue;
 
-		if (desc->pd_ops->op_lprocfs_fini != NULL)
+		if (desc->pd_ops->op_lprocfs_fini)
 			desc->pd_ops->op_lprocfs_fini(svc);
 	}
 
@@ -1459,7 +1455,7 @@ ptlrpc_nrs_req_get_nolock0(struct ptlrpc_service_part *svcpt, bool hp,
 	list_for_each_entry(policy, &nrs->nrs_policy_queued,
 				pol_list_queued) {
 		nrq = nrs_request_get(policy, peek, force);
-		if (nrq != NULL) {
+		if (nrq) {
 			if (likely(!peek)) {
 				nrq->nr_started = 1;
 
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
index 8e21f0c..77894f8 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
@@ -83,7 +83,7 @@ static int nrs_fifo_start(struct ptlrpc_nrs_policy *policy)
 	head = kzalloc_node(sizeof(*head), GFP_NOFS,
 			    cfs_cpt_spread_node(nrs_pol2cptab(policy),
 						nrs_pol2cptid(policy)));
-	if (head == NULL)
+	if (!head)
 		return -ENOMEM;
 
 	INIT_LIST_HEAD(&head->fh_list);
@@ -104,7 +104,7 @@ static void nrs_fifo_stop(struct ptlrpc_nrs_policy *policy)
 {
 	struct nrs_fifo_head *head = policy->pol_private;
 
-	LASSERT(head != NULL);
+	LASSERT(head);
 	LASSERT(list_empty(&head->fh_list));
 
 	kfree(head);
@@ -169,7 +169,7 @@ struct ptlrpc_nrs_request *nrs_fifo_req_get(struct ptlrpc_nrs_policy *policy,
 	      list_entry(head->fh_list.next, struct ptlrpc_nrs_request,
 			     nr_u.fifo.fr_list);
 
-	if (likely(!peek && nrq != NULL)) {
+	if (likely(!peek && nrq)) {
 		struct ptlrpc_request *req = container_of(nrq,
 							  struct ptlrpc_request,
 							  rq_nrq);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c b/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c
index f3cb518..36a6ece 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c
@@ -183,7 +183,7 @@ void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, __u32 *lens,
 	for (i = 0; i < count; i++)
 		msg->lm_buflens[i] = lens[i];
 
-	if (bufs == NULL)
+	if (!bufs)
 		return;
 
 	ptr = (char *)msg + lustre_msg_hdr_size_v2(count);
@@ -306,7 +306,7 @@ int lustre_pack_reply_v2(struct ptlrpc_request *req, int count,
 	struct ptlrpc_reply_state *rs;
 	int msg_len, rc;
 
-	LASSERT(req->rq_reply_state == NULL);
+	LASSERT(!req->rq_reply_state);
 
 	if ((flags & LPRFL_EARLY_REPLY) == 0) {
 		spin_lock(&req->rq_lock);
@@ -383,7 +383,6 @@ void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, int n, int min_size)
 {
 	int i, offset, buflen, bufcount;
 
-	LASSERT(m != NULL);
 	LASSERT(n >= 0);
 
 	bufcount = m->lm_bufcount;
@@ -488,7 +487,7 @@ void lustre_free_reply_state(struct ptlrpc_reply_state *rs)
 	LASSERT(!rs->rs_difficult || rs->rs_handled);
 	LASSERT(!rs->rs_on_net);
 	LASSERT(!rs->rs_scheduled);
-	LASSERT(rs->rs_export == NULL);
+	LASSERT(!rs->rs_export);
 	LASSERT(rs->rs_nlocks == 0);
 	LASSERT(list_empty(&rs->rs_exp_list));
 	LASSERT(list_empty(&rs->rs_obd_list));
@@ -705,7 +704,7 @@ char *lustre_msg_string(struct lustre_msg *m, int index, int max_len)
 		LASSERTF(0, "incorrect message magic: %08x\n", m->lm_magic);
 	}
 
-	if (str == NULL) {
+	if (!str) {
 		CERROR("can't unpack string in msg %p buffer[%d]\n", m, index);
 		return NULL;
 	}
@@ -740,7 +739,6 @@ static inline void *__lustre_swab_buf(struct lustre_msg *msg, int index,
 {
 	void *ptr = NULL;
 
-	LASSERT(msg != NULL);
 	switch (msg->lm_magic) {
 	case LUSTRE_MSG_MAGIC_V2:
 		ptr = lustre_msg_buf_v2(msg, index, min_size);
@@ -1377,7 +1375,7 @@ void lustre_msg_set_jobid(struct lustre_msg *msg, char *jobid)
 				       sizeof(struct ptlrpc_body));
 		LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
 
-		if (jobid != NULL)
+		if (jobid)
 			memcpy(pb->pb_jobid, jobid, JOBSTATS_JOBID_SIZE);
 		else if (pb->pb_jobid[0] == '\0')
 			lustre_get_jobid(pb->pb_jobid);
@@ -1427,7 +1425,7 @@ int do_set_info_async(struct obd_import *imp,
 	int rc;
 
 	req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
diff --git a/drivers/staging/lustre/lustre/ptlrpc/pinger.c b/drivers/staging/lustre/lustre/ptlrpc/pinger.c
index fb2d523..aae9b52 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/pinger.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/pinger.c
@@ -68,7 +68,7 @@ int ptlrpc_obd_ping(struct obd_device *obd)
 	struct ptlrpc_request *req;
 
 	req = ptlrpc_prep_ping(obd->u.cli.cl_import);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req->rq_send_state = LUSTRE_IMP_FULL;
@@ -86,7 +86,7 @@ static int ptlrpc_ping(struct obd_import *imp)
 	struct ptlrpc_request *req;
 
 	req = ptlrpc_prep_ping(imp);
-	if (req == NULL) {
+	if (!req) {
 		CERROR("OOM trying to ping %s->%s\n",
 		       imp->imp_obd->obd_uuid.uuid,
 		       obd2cli_tgt(imp->imp_obd));
@@ -489,7 +489,6 @@ int ptlrpc_del_timeout_client(struct list_head *obd_list,
 			break;
 		}
 	}
-	LASSERTF(ti != NULL, "ti is NULL !\n");
 	if (list_empty(&ti->ti_obd_list)) {
 		list_del(&ti->ti_chain);
 		kfree(ti);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c b/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
index 60fb0ce..f847383 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
@@ -163,8 +163,6 @@ void ptlrpcd_wake(struct ptlrpc_request *req)
 {
 	struct ptlrpc_request_set *rq_set = req->rq_set;
 
-	LASSERT(rq_set != NULL);
-
 	wake_up(&rq_set->set_waitq);
 }
 EXPORT_SYMBOL(ptlrpcd_wake);
@@ -176,7 +174,7 @@ ptlrpcd_select_pc(struct ptlrpc_request *req)
 	int		cpt;
 	int		idx;
 
-	if (req != NULL && req->rq_send_state != LUSTRE_IMP_FULL)
+	if (req && req->rq_send_state != LUSTRE_IMP_FULL)
 		return &ptlrpcd_rcv;
 
 	cpt = cfs_cpt_current(cfs_cpt_table, 1);
@@ -240,7 +238,7 @@ void ptlrpcd_add_req(struct ptlrpc_request *req)
 
 		req->rq_invalid_rqset = 0;
 		spin_unlock(&req->rq_lock);
-		l_wait_event(req->rq_set_waitq, (req->rq_set == NULL), &lwi);
+		l_wait_event(req->rq_set_waitq, !req->rq_set, &lwi);
 	} else if (req->rq_set) {
 		/* If we have a valid "rq_set", just reuse it to avoid double
 		 * linked. */
@@ -349,12 +347,12 @@ static int ptlrpcd_check(struct lu_env *env, struct ptlrpcd_ctl *pc)
 				partner = pc->pc_partners[pc->pc_cursor++];
 				if (pc->pc_cursor >= pc->pc_npartners)
 					pc->pc_cursor = 0;
-				if (partner == NULL)
+				if (!partner)
 					continue;
 
 				spin_lock(&partner->pc_lock);
 				ps = partner->pc_set;
-				if (ps == NULL) {
+				if (!ps) {
 					spin_unlock(&partner->pc_lock);
 					continue;
 				}
@@ -580,7 +578,7 @@ int ptlrpcd_start(struct ptlrpcd_ctl *pc)
 	return 0;
 
 out_set:
-	if (pc->pc_set != NULL) {
+	if (pc->pc_set) {
 		struct ptlrpc_request_set *set = pc->pc_set;
 
 		spin_lock(&pc->pc_lock);
@@ -631,7 +629,7 @@ void ptlrpcd_free(struct ptlrpcd_ctl *pc)
 
 out:
 	if (pc->pc_npartners > 0) {
-		LASSERT(pc->pc_partners != NULL);
+		LASSERT(pc->pc_partners);
 
 		kfree(pc->pc_partners);
 		pc->pc_partners = NULL;
@@ -645,7 +643,7 @@ static void ptlrpcd_fini(void)
 	int i;
 	int j;
 
-	if (ptlrpcds != NULL) {
+	if (ptlrpcds) {
 		for (i = 0; i < ptlrpcds_num; i++) {
 			if (!ptlrpcds[i])
 				break;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/recover.c b/drivers/staging/lustre/lustre/ptlrpc/recover.c
index 4359cac..d923197 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/recover.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/recover.c
@@ -138,7 +138,7 @@ int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
 
 	/* All the requests in committed list have been replayed, let's replay
 	 * the imp_replay_list */
-	if (req == NULL) {
+	if (!req) {
 		list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
 			req = list_entry(tmp, struct ptlrpc_request,
 					 rq_replay_list);
@@ -153,14 +153,14 @@ int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
 	 * has occurred), then stop on the matching req and send it again.
 	 * If, however, the last sent transno has been committed then we
 	 * continue replay from the next request. */
-	if (req != NULL && imp->imp_resend_replay)
+	if (req && imp->imp_resend_replay)
 		lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
 
 	spin_lock(&imp->imp_lock);
 	imp->imp_resend_replay = 0;
 	spin_unlock(&imp->imp_lock);
 
-	if (req != NULL) {
+	if (req) {
 		rc = ptlrpc_replay_req(req);
 		if (rc) {
 			CERROR("recovery replay error %d for req %llu\n",
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec.c b/drivers/staging/lustre/lustre/ptlrpc/sec.c
index 39f5261..c91e131 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec.c
@@ -94,7 +94,7 @@ int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy)
 	LASSERT(number < SPTLRPC_POLICY_MAX);
 
 	write_lock(&policy_lock);
-	if (unlikely(policies[number] == NULL)) {
+	if (unlikely(!policies[number])) {
 		write_unlock(&policy_lock);
 		CERROR("%s: already unregistered\n", policy->sp_name);
 		return -EINVAL;
@@ -126,11 +126,11 @@ struct ptlrpc_sec_policy *sptlrpc_wireflavor2policy(__u32 flavor)
 		policy = policies[number];
 		if (policy && !try_module_get(policy->sp_owner))
 			policy = NULL;
-		if (policy == NULL)
+		if (!policy)
 			flag = atomic_read(&loaded);
 		read_unlock(&policy_lock);
 
-		if (policy != NULL || flag != 0 ||
+		if (policy || flag != 0 ||
 		    number != SPTLRPC_POLICY_GSS)
 			break;
 
@@ -327,7 +327,7 @@ static int import_sec_validate_get(struct obd_import *imp,
 	}
 
 	*sec = sptlrpc_import_sec_ref(imp);
-	if (*sec == NULL) {
+	if (!*sec) {
 		CERROR("import %p (%s) with no sec\n",
 		       imp, ptlrpc_import_state_name(imp->imp_state));
 		return -EACCES;
@@ -429,7 +429,7 @@ int sptlrpc_req_ctx_switch(struct ptlrpc_request *req,
 	reqmsg_size = req->rq_reqlen;
 	if (reqmsg_size != 0) {
 		reqmsg = libcfs_kvzalloc(reqmsg_size, GFP_NOFS);
-		if (reqmsg == NULL)
+		if (!reqmsg)
 			return -ENOMEM;
 		memcpy(reqmsg, req->rq_reqmsg, reqmsg_size);
 	}
@@ -938,7 +938,7 @@ static int do_cli_unwrap_reply(struct ptlrpc_request *req)
 	LASSERT(ctx->cc_sec);
 	LASSERT(req->rq_repbuf);
 	LASSERT(req->rq_repdata);
-	LASSERT(req->rq_repmsg == NULL);
+	LASSERT(!req->rq_repmsg);
 
 	req->rq_rep_swab_mask = 0;
 
@@ -1000,8 +1000,8 @@ static int do_cli_unwrap_reply(struct ptlrpc_request *req)
 int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req)
 {
 	LASSERT(req->rq_repbuf);
-	LASSERT(req->rq_repdata == NULL);
-	LASSERT(req->rq_repmsg == NULL);
+	LASSERT(!req->rq_repdata);
+	LASSERT(!req->rq_repmsg);
 	LASSERT(req->rq_reply_off + req->rq_nob_received <= req->rq_repbuf_len);
 
 	if (req->rq_reply_off == 0 &&
@@ -1046,13 +1046,13 @@ int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req,
 	int rc;
 
 	early_req = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (early_req == NULL)
+	if (!early_req)
 		return -ENOMEM;
 
 	early_size = req->rq_nob_received;
 	early_bufsz = size_roundup_power2(early_size);
 	early_buf = libcfs_kvzalloc(early_bufsz, GFP_NOFS);
-	if (early_buf == NULL) {
+	if (!early_buf) {
 		rc = -ENOMEM;
 		goto err_req;
 	}
@@ -1067,8 +1067,8 @@ int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req,
 	}
 
 	LASSERT(req->rq_repbuf);
-	LASSERT(req->rq_repdata == NULL);
-	LASSERT(req->rq_repmsg == NULL);
+	LASSERT(!req->rq_repdata);
+	LASSERT(!req->rq_repmsg);
 
 	if (req->rq_reply_off != 0) {
 		CERROR("early reply with offset %u\n", req->rq_reply_off);
@@ -1354,12 +1354,12 @@ int sptlrpc_import_sec_adapt(struct obd_import *imp,
 
 	might_sleep();
 
-	if (imp == NULL)
+	if (!imp)
 		return 0;
 
 	conn = imp->imp_connection;
 
-	if (svc_ctx == NULL) {
+	if (!svc_ctx) {
 		struct client_obd *cliobd = &imp->imp_obd->u.cli;
 		/*
 		 * normal import, determine flavor from rule set, except
@@ -1447,11 +1447,11 @@ static void import_flush_ctx_common(struct obd_import *imp,
 {
 	struct ptlrpc_sec *sec;
 
-	if (imp == NULL)
+	if (!imp)
 		return;
 
 	sec = sptlrpc_import_sec_ref(imp);
-	if (sec == NULL)
+	if (!sec)
 		return;
 
 	sec_cop_flush_ctx_cache(sec, uid, grace, force);
@@ -1484,7 +1484,7 @@ int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize)
 	LASSERT(ctx);
 	LASSERT(ctx->cc_sec);
 	LASSERT(ctx->cc_sec->ps_policy);
-	LASSERT(req->rq_reqmsg == NULL);
+	LASSERT(!req->rq_reqmsg);
 	LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
 	policy = ctx->cc_sec->ps_policy;
@@ -1515,7 +1515,7 @@ void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req)
 	LASSERT(ctx->cc_sec->ps_policy);
 	LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
-	if (req->rq_reqbuf == NULL && req->rq_clrbuf == NULL)
+	if (!req->rq_reqbuf && !req->rq_clrbuf)
 		return;
 
 	policy = ctx->cc_sec->ps_policy;
@@ -1632,7 +1632,7 @@ void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req)
 	LASSERT(ctx->cc_sec->ps_policy);
 	LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
-	if (req->rq_repbuf == NULL)
+	if (!req->rq_repbuf)
 		return;
 	LASSERT(req->rq_repbuf_len);
 
@@ -1684,12 +1684,12 @@ int sptlrpc_target_export_check(struct obd_export *exp,
 {
 	struct sptlrpc_flavor flavor;
 
-	if (exp == NULL)
+	if (!exp)
 		return 0;
 
 	/* client side export has no imp_reverse, skip
 	 * FIXME maybe we should check flavor this as well??? */
-	if (exp->exp_imp_reverse == NULL)
+	if (!exp->exp_imp_reverse)
 		return 0;
 
 	/* don't care about ctx fini rpc */
@@ -1915,9 +1915,9 @@ int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req)
 	int rc;
 
 	LASSERT(msg);
-	LASSERT(req->rq_reqmsg == NULL);
-	LASSERT(req->rq_repmsg == NULL);
-	LASSERT(req->rq_svc_ctx == NULL);
+	LASSERT(!req->rq_reqmsg);
+	LASSERT(!req->rq_repmsg);
+	LASSERT(!req->rq_svc_ctx);
 
 	req->rq_req_swab_mask = 0;
 
@@ -1994,7 +1994,7 @@ int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen)
 
 		/* failed alloc, try emergency pool */
 		rs = lustre_get_emerg_rs(svcpt);
-		if (rs == NULL)
+		if (!rs)
 			return -ENOMEM;
 
 		req->rq_reply_state = rs;
@@ -2059,7 +2059,7 @@ void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req)
 {
 	struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
 
-	if (ctx != NULL)
+	if (ctx)
 		atomic_inc(&ctx->sc_refcount);
 }
 
@@ -2067,7 +2067,7 @@ void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req)
 {
 	struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
 
-	if (ctx == NULL)
+	if (!ctx)
 		return;
 
 	LASSERT_ATOMIC_POS(&ctx->sc_refcount);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 52a6c51..ca04e65 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -195,7 +195,7 @@ static void enc_pools_release_free_pages(long npages)
 
 	while (npages--) {
 		LASSERT(page_pools.epp_pools[p_idx]);
-		LASSERT(page_pools.epp_pools[p_idx][g_idx] != NULL);
+		LASSERT(page_pools.epp_pools[p_idx][g_idx]);
 
 		__free_page(page_pools.epp_pools[p_idx][g_idx]);
 		page_pools.epp_pools[p_idx][g_idx] = NULL;
@@ -316,7 +316,7 @@ void sptlrpc_enc_pool_put_pages(struct ptlrpc_bulk_desc *desc)
 	int p_idx, g_idx;
 	int i;
 
-	if (desc->bd_enc_iov == NULL)
+	if (!desc->bd_enc_iov)
 		return;
 
 	LASSERT(desc->bd_iov_count > 0);
@@ -331,9 +331,9 @@ void sptlrpc_enc_pool_put_pages(struct ptlrpc_bulk_desc *desc)
 	LASSERT(page_pools.epp_pools[p_idx]);
 
 	for (i = 0; i < desc->bd_iov_count; i++) {
-		LASSERT(desc->bd_enc_iov[i].kiov_page != NULL);
+		LASSERT(desc->bd_enc_iov[i].kiov_page);
 		LASSERT(g_idx != 0 || page_pools.epp_pools[p_idx]);
-		LASSERT(page_pools.epp_pools[p_idx][g_idx] == NULL);
+		LASSERT(!page_pools.epp_pools[p_idx][g_idx]);
 
 		page_pools.epp_pools[p_idx][g_idx] =
 					desc->bd_enc_iov[i].kiov_page;
@@ -412,7 +412,7 @@ int sptlrpc_enc_pool_init(void)
 	page_pools.epp_st_max_wait = 0;
 
 	enc_pools_alloc();
-	if (page_pools.epp_pools == NULL)
+	if (!page_pools.epp_pools)
 		return -ENOMEM;
 
 	register_shrinker(&pools_shrinker);
@@ -475,7 +475,7 @@ int bulk_sec_desc_unpack(struct lustre_msg *msg, int offset, int swabbed)
 	int			  size = msg->lm_buflens[offset];
 
 	bsd = lustre_msg_buf(msg, offset, sizeof(*bsd));
-	if (bsd == NULL) {
+	if (!bsd) {
 		CERROR("Invalid bulk sec desc: size %d\n", size);
 		return -EINVAL;
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_config.c b/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
index 4b0b81c..93b91bf 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
@@ -78,7 +78,7 @@ int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 
 	memset(flvr, 0, sizeof(*flvr));
 
-	if (str == NULL || str[0] == '\0') {
+	if (!str || str[0] == '\0') {
 		flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 		return 0;
 	}
@@ -103,7 +103,7 @@ int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 			 * format: plain-hash:<hash_alg>
 			 */
 			alg = strchr(bulk, ':');
-			if (alg == NULL)
+			if (!alg)
 				goto err_out;
 			*alg++ = '\0';
 
@@ -166,7 +166,7 @@ static int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 	sptlrpc_rule_init(rule);
 
 	flavor = strchr(param, '=');
-	if (flavor == NULL) {
+	if (!flavor) {
 		CERROR("invalid param, no '='\n");
 		return -EINVAL;
 	}
@@ -216,7 +216,7 @@ static int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 static void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 {
 	LASSERT(rset->srs_nslot ||
-		(rset->srs_nrule == 0 && rset->srs_rules == NULL));
+		(rset->srs_nrule == 0 && !rset->srs_rules));
 
 	if (rset->srs_nslot) {
 		kfree(rset->srs_rules);
@@ -241,7 +241,7 @@ static int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 
 	/* better use realloc() if available */
 	rules = kcalloc(nslot, sizeof(*rset->srs_rules), GFP_NOFS);
-	if (rules == NULL)
+	if (!rules)
 		return -ENOMEM;
 
 	if (rset->srs_nrule) {
@@ -450,7 +450,7 @@ static void target2fsname(const char *tgt, char *fsname, int buflen)
 	}
 
 	/* if we didn't find the pattern, treat the whole string as fsname */
-	if (ptr == NULL)
+	if (!ptr)
 		len = strlen(tgt);
 	else
 		len = ptr - tgt;
@@ -579,13 +579,13 @@ static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 	int rc;
 
 	target = lustre_cfg_string(lcfg, 1);
-	if (target == NULL) {
+	if (!target) {
 		CERROR("missing target name\n");
 		return -EINVAL;
 	}
 
 	param = lustre_cfg_string(lcfg, 2);
-	if (param == NULL) {
+	if (!param) {
 		CERROR("missing parameter\n");
 		return -EINVAL;
 	}
@@ -603,12 +603,12 @@ static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 	if (rc)
 		return -EINVAL;
 
-	if (conf == NULL) {
+	if (!conf) {
 		target2fsname(target, fsname, sizeof(fsname));
 
 		mutex_lock(&sptlrpc_conf_lock);
 		conf = sptlrpc_conf_get(fsname, 0);
-		if (conf == NULL) {
+		if (!conf) {
 			CERROR("can't find conf\n");
 			rc = -ENOMEM;
 		} else {
@@ -638,7 +638,7 @@ static int logname2fsname(const char *logname, char *buf, int buflen)
 	int len;
 
 	ptr = strrchr(logname, '-');
-	if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
+	if (!ptr || strcmp(ptr, "-sptlrpc")) {
 		CERROR("%s is not a sptlrpc config log\n", logname);
 		return -EINVAL;
 	}
@@ -772,7 +772,7 @@ void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 	mutex_lock(&sptlrpc_conf_lock);
 
 	conf = sptlrpc_conf_get(name, 0);
-	if (conf == NULL)
+	if (!conf)
 		goto out;
 
 	/* convert uuid name (supposed end with _UUID) to target name */
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c b/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c
index bda9a77..e610a8d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c
@@ -82,7 +82,7 @@ static int sptlrpc_info_lprocfs_seq_show(struct seq_file *seq, void *v)
 
 	if (cli->cl_import)
 		sec = sptlrpc_import_sec_ref(cli->cl_import);
-	if (sec == NULL)
+	if (!sec)
 		goto out;
 
 	sec_flags2str(sec->ps_flvr.sf_flags, str, sizeof(str));
@@ -121,7 +121,7 @@ static int sptlrpc_ctxs_lprocfs_seq_show(struct seq_file *seq, void *v)
 
 	if (cli->cl_import)
 		sec = sptlrpc_import_sec_ref(cli->cl_import);
-	if (sec == NULL)
+	if (!sec)
 		goto out;
 
 	if (sec->ps_policy->sp_cops->display)
@@ -178,7 +178,7 @@ int sptlrpc_lproc_init(void)
 {
 	int rc;
 
-	LASSERT(sptlrpc_debugfs_dir == NULL);
+	LASSERT(!sptlrpc_debugfs_dir);
 
 	sptlrpc_debugfs_dir = ldebugfs_register("sptlrpc", debugfs_lustre_root,
 						sptlrpc_lprocfs_vars, NULL);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_null.c b/drivers/staging/lustre/lustre/ptlrpc/sec_null.c
index ebfa609..446837d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_null.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_null.c
@@ -250,7 +250,7 @@ int null_enlarge_reqbuf(struct ptlrpc_sec *sec,
 		alloc_size = size_roundup_power2(newmsg_size);
 
 		newbuf = libcfs_kvzalloc(alloc_size, GFP_NOFS);
-		if (newbuf == NULL)
+		if (!newbuf)
 			return -ENOMEM;
 
 		/* Must lock this, so that otherwise unprotected change of
@@ -319,7 +319,7 @@ int null_alloc_rs(struct ptlrpc_request *req, int msgsize)
 		LASSERT(rs->rs_size >= rs_size);
 	} else {
 		rs = libcfs_kvzalloc(rs_size, GFP_NOFS);
-		if (rs == NULL)
+		if (!rs)
 			return -ENOMEM;
 
 		rs->rs_size = rs_size;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
index 905a414..cffddc0 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
@@ -104,7 +104,7 @@ static int plain_unpack_bsd(struct lustre_msg *msg, int swabbed)
 		return -EPROTO;
 
 	bsd = lustre_msg_buf(msg, PLAIN_PACK_BULK_OFF, PLAIN_BSD_SIZE);
-	if (bsd == NULL) {
+	if (!bsd) {
 		CERROR("bulk sec desc has short size %d\n",
 		       lustre_msg_buflen(msg, PLAIN_PACK_BULK_OFF));
 		return -EPROTO;
@@ -227,7 +227,7 @@ int plain_ctx_verify(struct ptlrpc_cli_ctx *ctx, struct ptlrpc_request *req)
 	swabbed = ptlrpc_rep_need_swab(req);
 
 	phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, sizeof(*phdr));
-	if (phdr == NULL) {
+	if (!phdr) {
 		CERROR("missing plain header\n");
 		return -EPROTO;
 	}
@@ -419,7 +419,7 @@ void plain_destroy_sec(struct ptlrpc_sec *sec)
 	LASSERT(sec->ps_import);
 	LASSERT(atomic_read(&sec->ps_refcount) == 0);
 	LASSERT(atomic_read(&sec->ps_nctx) == 0);
-	LASSERT(plsec->pls_ctx == NULL);
+	LASSERT(!plsec->pls_ctx);
 
 	class_import_put(sec->ps_import);
 
@@ -468,7 +468,7 @@ struct ptlrpc_sec *plain_create_sec(struct obd_import *imp,
 	/* install ctx immediately if this is a reverse sec */
 	if (svc_ctx) {
 		ctx = plain_sec_install_ctx(plsec);
-		if (ctx == NULL) {
+		if (!ctx) {
 			plain_destroy_sec(sec);
 			return NULL;
 		}
@@ -492,7 +492,7 @@ struct ptlrpc_cli_ctx *plain_lookup_ctx(struct ptlrpc_sec *sec,
 		atomic_inc(&ctx->cc_refcount);
 	read_unlock(&plsec->pls_lock);
 
-	if (unlikely(ctx == NULL))
+	if (unlikely(!ctx))
 		ctx = plain_sec_install_ctx(plsec);
 
 	return ctx;
@@ -665,7 +665,7 @@ int plain_enlarge_reqbuf(struct ptlrpc_sec *sec,
 		newbuf_size = size_roundup_power2(newbuf_size);
 
 		newbuf = libcfs_kvzalloc(newbuf_size, GFP_NOFS);
-		if (newbuf == NULL)
+		if (!newbuf)
 			return -ENOMEM;
 
 		/* Must lock this, so that otherwise unprotected change of
@@ -732,7 +732,7 @@ int plain_accept(struct ptlrpc_request *req)
 	swabbed = ptlrpc_req_need_swab(req);
 
 	phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, sizeof(*phdr));
-	if (phdr == NULL) {
+	if (!phdr) {
 		CERROR("missing plain header\n");
 		return -EPROTO;
 	}
@@ -801,7 +801,7 @@ int plain_alloc_rs(struct ptlrpc_request *req, int msgsize)
 		LASSERT(rs->rs_size >= rs_size);
 	} else {
 		rs = libcfs_kvzalloc(rs_size, GFP_NOFS);
-		if (rs == NULL)
+		if (!rs)
 			return -ENOMEM;
 
 		rs->rs_size = rs_size;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c b/drivers/staging/lustre/lustre/ptlrpc/service.c
index 8598300..38dbba5 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/service.c
@@ -77,7 +77,7 @@ ptlrpc_alloc_rqbd(struct ptlrpc_service_part *svcpt)
 	rqbd = kzalloc_node(sizeof(*rqbd), GFP_NOFS,
 			    cfs_cpt_spread_node(svc->srv_cptable,
 						svcpt->scp_cpt));
-	if (rqbd == NULL)
+	if (!rqbd)
 		return NULL;
 
 	rqbd->rqbd_svcpt = svcpt;
@@ -89,7 +89,7 @@ ptlrpc_alloc_rqbd(struct ptlrpc_service_part *svcpt)
 						svcpt->scp_cpt,
 						svc->srv_buf_size,
 						GFP_KERNEL);
-	if (rqbd->rqbd_buffer == NULL) {
+	if (!rqbd->rqbd_buffer) {
 		kfree(rqbd);
 		return NULL;
 	}
@@ -150,7 +150,7 @@ ptlrpc_grow_req_bufs(struct ptlrpc_service_part *svcpt, int post)
 
 		rqbd = ptlrpc_alloc_rqbd(svcpt);
 
-		if (rqbd == NULL) {
+		if (!rqbd) {
 			CERROR("%s: Can't allocate request buffer\n",
 			       svc->srv_name);
 			rc = -ENOMEM;
@@ -490,7 +490,7 @@ ptlrpc_service_part_init(struct ptlrpc_service *svc,
 	array->paa_reqs_array =
 		kzalloc_node(sizeof(struct list_head) * size, GFP_NOFS,
 			     cfs_cpt_spread_node(svc->srv_cptable, cpt));
-	if (array->paa_reqs_array == NULL)
+	if (!array->paa_reqs_array)
 		return -ENOMEM;
 
 	for (index = 0; index < size; index++)
@@ -499,7 +499,7 @@ ptlrpc_service_part_init(struct ptlrpc_service *svc,
 	array->paa_reqs_count =
 		kzalloc_node(sizeof(__u32) * size, GFP_NOFS,
 			     cfs_cpt_spread_node(svc->srv_cptable, cpt));
-	if (array->paa_reqs_count == NULL)
+	if (!array->paa_reqs_count)
 		goto free_reqs_array;
 
 	setup_timer(&svcpt->scp_at_timer, ptlrpc_at_timer,
@@ -556,14 +556,14 @@ ptlrpc_register_service(struct ptlrpc_service_conf *conf,
 	LASSERT(conf->psc_thr.tc_ctx_tags != 0);
 
 	cptable = cconf->cc_cptable;
-	if (cptable == NULL)
+	if (!cptable)
 		cptable = cfs_cpt_table;
 
 	if (!conf->psc_thr.tc_cpu_affinity) {
 		ncpts = 1;
 	} else {
 		ncpts = cfs_cpt_number(cptable);
-		if (cconf->cc_pattern != NULL) {
+		if (cconf->cc_pattern) {
 			struct cfs_expr_list *el;
 
 			rc = cfs_expr_list_parse(cconf->cc_pattern,
@@ -632,11 +632,11 @@ ptlrpc_register_service(struct ptlrpc_service_conf *conf,
 		if (!conf->psc_thr.tc_cpu_affinity)
 			cpt = CFS_CPT_ANY;
 		else
-			cpt = cpts != NULL ? cpts[i] : i;
+			cpt = cpts ? cpts[i] : i;
 
 		svcpt = kzalloc_node(sizeof(*svcpt), GFP_NOFS,
 				     cfs_cpt_spread_node(cptable, cpt));
-		if (svcpt == NULL) {
+		if (!svcpt) {
 			rc = -ENOMEM;
 			goto failed;
 		}
@@ -846,7 +846,7 @@ static void ptlrpc_server_finish_active_request(
 
 	ptlrpc_nrs_req_finalize(req);
 
-	if (req->rq_export != NULL)
+	if (req->rq_export)
 		class_export_rpc_dec(req->rq_export);
 
 	ptlrpc_server_finish_request(svcpt, req);
@@ -869,13 +869,13 @@ static int ptlrpc_check_req(struct ptlrpc_request *req)
 			  req->rq_export->exp_conn_cnt);
 		return -EEXIST;
 	}
-	if (unlikely(obd == NULL || obd->obd_fail)) {
+	if (unlikely(!obd || obd->obd_fail)) {
 		/*
 		 * Failing over, don't handle any more reqs, send
 		 * error response instead.
 		 */
 		CDEBUG(D_RPCTRACE, "Dropping req %p for failed obd %s\n",
-		       req, (obd != NULL) ? obd->obd_name : "unknown");
+		       req, obd ? obd->obd_name : "unknown");
 		rc = -ENODEV;
 	} else if (lustre_msg_get_flags(req->rq_reqmsg) &
 		   (MSG_REPLAY | MSG_REQ_REPLAY_DONE)) {
@@ -1044,7 +1044,7 @@ static int ptlrpc_at_send_early_reply(struct ptlrpc_request *req)
 	newdl = ktime_get_real_seconds() + at_get(&svcpt->scp_at_estimate);
 
 	reqcopy = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (reqcopy == NULL)
+	if (!reqcopy)
 		return -ENOMEM;
 	reqmsg = libcfs_kvzalloc(req->rq_reqlen, GFP_NOFS);
 	if (!reqmsg) {
@@ -1074,7 +1074,7 @@ static int ptlrpc_at_send_early_reply(struct ptlrpc_request *req)
 	/* Connection ref */
 	reqcopy->rq_export = class_conn2export(
 				     lustre_msg_get_handle(reqcopy->rq_reqmsg));
-	if (reqcopy->rq_export == NULL) {
+	if (!reqcopy->rq_export) {
 		rc = -ENODEV;
 		goto out;
 	}
@@ -1316,7 +1316,7 @@ static bool ptlrpc_server_allow_high(struct ptlrpc_service_part *svcpt,
 		     CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))) {
 		/* leave just 1 thread for normal RPCs */
 		running = PTLRPC_NTHRS_INIT;
-		if (svcpt->scp_service->srv_ops.so_hpreq_handler != NULL)
+		if (svcpt->scp_service->srv_ops.so_hpreq_handler)
 			running += 1;
 	}
 
@@ -1355,7 +1355,7 @@ static bool ptlrpc_server_allow_normal(struct ptlrpc_service_part *svcpt,
 		     CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))) {
 		/* leave just 1 thread for normal RPCs */
 		running = PTLRPC_NTHRS_INIT;
-		if (svcpt->scp_service->srv_ops.so_hpreq_handler != NULL)
+		if (svcpt->scp_service->srv_ops.so_hpreq_handler)
 			running += 1;
 	}
 
@@ -1405,7 +1405,7 @@ ptlrpc_server_request_get(struct ptlrpc_service_part *svcpt, bool force)
 
 	if (ptlrpc_server_high_pending(svcpt, force)) {
 		req = ptlrpc_nrs_req_get_nolock(svcpt, true, force);
-		if (req != NULL) {
+		if (req) {
 			svcpt->scp_hreq_count++;
 			goto got_request;
 		}
@@ -1413,7 +1413,7 @@ ptlrpc_server_request_get(struct ptlrpc_service_part *svcpt, bool force)
 
 	if (ptlrpc_server_normal_pending(svcpt, force)) {
 		req = ptlrpc_nrs_req_get_nolock(svcpt, false, force);
-		if (req != NULL) {
+		if (req) {
 			svcpt->scp_hreq_count = 0;
 			goto got_request;
 		}
@@ -1598,7 +1598,7 @@ ptlrpc_server_handle_request(struct ptlrpc_service_part *svcpt,
 	int fail_opc = 0;
 
 	request = ptlrpc_server_request_get(svcpt, false);
-	if (request == NULL)
+	if (!request)
 		return 0;
 
 	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT))
@@ -1620,7 +1620,7 @@ ptlrpc_server_handle_request(struct ptlrpc_service_part *svcpt,
 	timediff = timespec64_sub(work_start, request->rq_arrival_time);
 	timediff_usecs = timediff.tv_sec * USEC_PER_SEC +
 			 timediff.tv_nsec / NSEC_PER_USEC;
-	if (likely(svc->srv_stats != NULL)) {
+	if (likely(svc->srv_stats)) {
 		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQWAIT_CNTR,
 				    timediff_usecs);
 		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQQDEPTH_CNTR,
@@ -1718,7 +1718,7 @@ put_conn:
 	       request->rq_status,
 	       (request->rq_repmsg ?
 		lustre_msg_get_status(request->rq_repmsg) : -999));
-	if (likely(svc->srv_stats != NULL && request->rq_reqmsg != NULL)) {
+	if (likely(svc->srv_stats && request->rq_reqmsg)) {
 		__u32 op = lustre_msg_get_opc(request->rq_reqmsg);
 		int opc = opcode_offset(op);
 
@@ -2008,7 +2008,7 @@ static int ptlrpc_main(void *arg)
 	set_current_groups(ginfo);
 	put_group_info(ginfo);
 
-	if (svc->srv_ops.so_thr_init != NULL) {
+	if (svc->srv_ops.so_thr_init) {
 		rc = svc->srv_ops.so_thr_init(thread);
 		if (rc)
 			goto out;
@@ -2132,10 +2132,10 @@ out_srv_fini:
 	/*
 	 * deconstruct service specific state created by ptlrpc_start_thread()
 	 */
-	if (svc->srv_ops.so_thr_done != NULL)
+	if (svc->srv_ops.so_thr_done)
 		svc->srv_ops.so_thr_done(thread);
 
-	if (env != NULL) {
+	if (env) {
 		lu_context_fini(&env->le_ctx);
 		kfree(env);
 	}
@@ -2229,14 +2229,14 @@ static void ptlrpc_stop_hr_threads(void)
 	ptlrpc_hr.hr_stopping = 1;
 
 	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		if (hrp->hrp_thrs == NULL)
+		if (!hrp->hrp_thrs)
 			continue; /* uninitialized */
 		for (j = 0; j < hrp->hrp_nthrs; j++)
 			wake_up_all(&hrp->hrp_thrs[j].hrt_waitq);
 	}
 
 	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		if (hrp->hrp_thrs == NULL)
+		if (!hrp->hrp_thrs)
 			continue; /* uninitialized */
 		wait_event(ptlrpc_hr.hr_waitq,
 			       atomic_read(&hrp->hrp_nstopped) ==
@@ -2333,7 +2333,7 @@ static void ptlrpc_stop_all_threads(struct ptlrpc_service *svc)
 	int i;
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service != NULL)
+		if (svcpt->scp_service)
 			ptlrpc_svcpt_stop_threads(svcpt);
 	}
 }
@@ -2376,8 +2376,6 @@ int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
 	struct ptlrpc_service *svc;
 	int rc;
 
-	LASSERT(svcpt != NULL);
-
 	svc = svcpt->scp_service;
 
 	CDEBUG(D_RPCTRACE, "%s[%d] started %d min %d max %d\n",
@@ -2396,7 +2394,7 @@ int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
 	thread = kzalloc_node(sizeof(*thread), GFP_NOFS,
 			      cfs_cpt_spread_node(svc->srv_cptable,
 						  svcpt->scp_cpt));
-	if (thread == NULL)
+	if (!thread)
 		return -ENOMEM;
 	init_waitqueue_head(&thread->t_ctl_waitq);
 
@@ -2488,7 +2486,7 @@ int ptlrpc_hr_init(void)
 
 	ptlrpc_hr.hr_partitions = cfs_percpt_alloc(ptlrpc_hr.hr_cpt_table,
 						   sizeof(*hrp));
-	if (ptlrpc_hr.hr_partitions == NULL)
+	if (!ptlrpc_hr.hr_partitions)
 		return -ENOMEM;
 
 	init_waitqueue_head(&ptlrpc_hr.hr_waitq);
@@ -2509,7 +2507,7 @@ int ptlrpc_hr_init(void)
 			kzalloc_node(hrp->hrp_nthrs * sizeof(*hrt), GFP_NOFS,
 				cfs_cpt_spread_node(ptlrpc_hr.hr_cpt_table,
 						    i));
-		if (hrp->hrp_thrs == NULL) {
+		if (!hrp->hrp_thrs) {
 			rc = -ENOMEM;
 			goto out;
 		}
@@ -2537,7 +2535,7 @@ void ptlrpc_hr_fini(void)
 	struct ptlrpc_hr_partition *hrp;
 	int i;
 
-	if (ptlrpc_hr.hr_partitions == NULL)
+	if (!ptlrpc_hr.hr_partitions)
 		return;
 
 	ptlrpc_stop_hr_threads();
@@ -2577,7 +2575,7 @@ ptlrpc_service_del_atimer(struct ptlrpc_service *svc)
 
 	/* early disarm AT timer... */
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service != NULL)
+		if (svcpt->scp_service)
 			del_timer(&svcpt->scp_at_timer);
 	}
 }
@@ -2599,7 +2597,7 @@ ptlrpc_service_unlink_rqbd(struct ptlrpc_service *svc)
 	LASSERT(rc == 0);
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		/* Unlink all the request buffers.  This forces a 'final'
@@ -2612,7 +2610,7 @@ ptlrpc_service_unlink_rqbd(struct ptlrpc_service *svc)
 	}
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		/* Wait for the network to release any buffers
@@ -2648,7 +2646,7 @@ ptlrpc_service_purge_all(struct ptlrpc_service *svc)
 	int i;
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		spin_lock(&svcpt->scp_rep_lock);
@@ -2714,7 +2712,7 @@ ptlrpc_service_free(struct ptlrpc_service *svc)
 	int i;
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		/* In case somebody rearmed this in the meantime */
@@ -2730,7 +2728,7 @@ ptlrpc_service_free(struct ptlrpc_service *svc)
 	ptlrpc_service_for_each_part(svcpt, i, svc)
 		kfree(svcpt);
 
-	if (svc->srv_cpts != NULL)
+	if (svc->srv_cpts)
 		cfs_expr_list_values_free(svc->srv_cpts, svc->srv_ncpts);
 
 	kfree(svc);
-- 
2.1.0

[lustre-devel] [PATCH 26/45] staging/lustre/ptlrpc: Adjust NULL comparison codestyle

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

All instances of "x == NULL" are changed to "!x" and
"x != NULL" to "x"

Also remove some redundant assertions.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/ptlrpc/client.c      | 75 +++++++++----------
 drivers/staging/lustre/lustre/ptlrpc/connection.c  |  2 +-
 drivers/staging/lustre/lustre/ptlrpc/events.c      |  2 +-
 drivers/staging/lustre/lustre/ptlrpc/import.c      |  9 ++-
 drivers/staging/lustre/lustre/ptlrpc/layout.c      | 26 +++----
 drivers/staging/lustre/lustre/ptlrpc/llog_client.c | 20 +++---
 drivers/staging/lustre/lustre/ptlrpc/llog_net.c    |  2 +-
 .../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c    | 31 ++++----
 drivers/staging/lustre/lustre/ptlrpc/niobuf.c      | 30 ++++----
 drivers/staging/lustre/lustre/ptlrpc/nrs.c         | 84 +++++++++++-----------
 drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c    |  6 +-
 .../staging/lustre/lustre/ptlrpc/pack_generic.c    | 14 ++--
 drivers/staging/lustre/lustre/ptlrpc/pinger.c      |  5 +-
 drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c     | 16 ++---
 drivers/staging/lustre/lustre/ptlrpc/recover.c     |  6 +-
 drivers/staging/lustre/lustre/ptlrpc/sec.c         | 54 +++++++-------
 drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c    | 12 ++--
 drivers/staging/lustre/lustre/ptlrpc/sec_config.c  | 24 +++----
 drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c   |  6 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_null.c    |  4 +-
 drivers/staging/lustre/lustre/ptlrpc/sec_plain.c   | 16 ++---
 drivers/staging/lustre/lustre/ptlrpc/service.c     | 76 ++++++++++----------
 22 files changed, 244 insertions(+), 276 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c
index 1cc3c69..9b89068 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/client.c
@@ -145,7 +145,7 @@ struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp(struct ptlrpc_request *req,
 
 	LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
 	desc = ptlrpc_new_bulk(npages, max_brw, type, portal);
-	if (desc == NULL)
+	if (!desc)
 		return NULL;
 
 	desc->bd_import_generation = req->rq_import_generation;
@@ -171,7 +171,7 @@ void __ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
 			     struct page *page, int pageoffset, int len, int pin)
 {
 	LASSERT(desc->bd_iov_count < desc->bd_max_iov);
-	LASSERT(page != NULL);
+	LASSERT(page);
 	LASSERT(pageoffset >= 0);
 	LASSERT(len > 0);
 	LASSERT(pageoffset + len <= PAGE_CACHE_SIZE);
@@ -193,7 +193,6 @@ void __ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc, int unpin)
 {
 	int i;
 
-	LASSERT(desc != NULL);
 	LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */
 	LASSERT(desc->bd_md_count == 0);	 /* network hands off */
 	LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
@@ -412,7 +411,7 @@ int ptlrpc_request_cache_init(void)
 	request_cache = kmem_cache_create("ptlrpc_cache",
 					  sizeof(struct ptlrpc_request),
 					  0, SLAB_HWCACHE_ALIGN, NULL);
-	return request_cache == NULL ? -ENOMEM : 0;
+	return !request_cache ? -ENOMEM : 0;
 }
 
 void ptlrpc_request_cache_fini(void)
@@ -442,8 +441,6 @@ void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
 	struct list_head *l, *tmp;
 	struct ptlrpc_request *req;
 
-	LASSERT(pool != NULL);
-
 	spin_lock(&pool->prp_lock);
 	list_for_each_safe(l, tmp, &pool->prp_req_list) {
 		req = list_entry(l, struct ptlrpc_request, rq_list);
@@ -753,7 +750,7 @@ ptlrpc_request_alloc_internal(struct obd_import *imp,
 	struct ptlrpc_request *request;
 
 	request = __ptlrpc_request_alloc(imp, pool);
-	if (request == NULL)
+	if (!request)
 		return NULL;
 
 	req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
@@ -952,10 +949,10 @@ void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
 	atomic_inc(&set->set_remaining);
 	req->rq_queued_time = cfs_time_current();
 
-	if (req->rq_reqmsg != NULL)
+	if (req->rq_reqmsg)
 		lustre_msg_set_jobid(req->rq_reqmsg, NULL);
 
-	if (set->set_producer != NULL)
+	if (set->set_producer)
 		/*
 		 * If the request set has a producer callback, the RPC must be
 		 * sent straight away
@@ -975,7 +972,7 @@ void ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
 	struct ptlrpc_request_set *set = pc->pc_set;
 	int count, i;
 
-	LASSERT(req->rq_set == NULL);
+	LASSERT(!req->rq_set);
 	LASSERT(test_bit(LIOD_STOP, &pc->pc_flags) == 0);
 
 	spin_lock(&set->set_new_req_lock);
@@ -1016,7 +1013,6 @@ static int ptlrpc_import_delay_req(struct obd_import *imp,
 {
 	int delay = 0;
 
-	LASSERT(status != NULL);
 	*status = 0;
 
 	if (req->rq_ctx_init || req->rq_ctx_fini) {
@@ -1079,7 +1075,7 @@ static int ptlrpc_console_allow(struct ptlrpc_request *req)
 	__u32 opc;
 	int err;
 
-	LASSERT(req->rq_reqmsg != NULL);
+	LASSERT(req->rq_reqmsg);
 	opc = lustre_msg_get_opc(req->rq_reqmsg);
 
 	/*
@@ -1168,7 +1164,7 @@ static int after_reply(struct ptlrpc_request *req)
 	struct timespec64 work_start;
 	long timediff;
 
-	LASSERT(obd != NULL);
+	LASSERT(obd);
 	/* repbuf must be unlinked */
 	LASSERT(!req->rq_receiving_reply && !req->rq_reply_unlink);
 
@@ -1248,7 +1244,7 @@ static int after_reply(struct ptlrpc_request *req)
 	ktime_get_real_ts64(&work_start);
 	timediff = (work_start.tv_sec - req->rq_arrival_time.tv_sec) * USEC_PER_SEC +
 		   (work_start.tv_nsec - req->rq_arrival_time.tv_nsec) / NSEC_PER_USEC;
-	if (obd->obd_svc_stats != NULL) {
+	if (obd->obd_svc_stats) {
 		lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
 				    timediff);
 		ptlrpc_lprocfs_rpc_sent(req, timediff);
@@ -1311,7 +1307,7 @@ static int after_reply(struct ptlrpc_request *req)
 			/* version recovery */
 			ptlrpc_save_versions(req);
 			ptlrpc_retain_replayable_request(req, imp);
-		} else if (req->rq_commit_cb != NULL &&
+		} else if (req->rq_commit_cb &&
 			   list_empty(&req->rq_replay_list)) {
 			/*
 			 * NB: don't call rq_commit_cb if it's already on
@@ -1438,7 +1434,7 @@ static inline int ptlrpc_set_producer(struct ptlrpc_request_set *set)
 {
 	int remaining, rc;
 
-	LASSERT(set->set_producer != NULL);
+	LASSERT(set->set_producer);
 
 	remaining = atomic_read(&set->set_remaining);
 
@@ -1751,7 +1747,7 @@ int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set)
 			 * process the reply. Similarly if the RPC returned
 			 * an error, and therefore the bulk will never arrive.
 			 */
-			if (req->rq_bulk == NULL || req->rq_status < 0) {
+			if (!req->rq_bulk || req->rq_status < 0) {
 				ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
 				goto interpret;
 			}
@@ -1803,7 +1799,7 @@ interpret:
 		}
 		ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
 
-		CDEBUG(req->rq_reqmsg != NULL ? D_RPCTRACE : 0,
+		CDEBUG(req->rq_reqmsg ? D_RPCTRACE : 0,
 		       "Completed RPC pname:cluuid:pid:xid:nid:opc %s:%s:%d:%llu:%s:%d\n",
 		       current_comm(), imp->imp_obd->obd_uuid.uuid,
 		       lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
@@ -1883,7 +1879,7 @@ int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
 		      "timed out for sent delay" : "timed out for slow reply"),
 		  (s64)req->rq_sent, (s64)req->rq_real_sent);
 
-	if (imp != NULL && obd_debug_peer_on_timeout)
+	if (imp && obd_debug_peer_on_timeout)
 		LNetDebugPeer(imp->imp_connection->c_peer);
 
 	ptlrpc_unregister_reply(req, async_unlink);
@@ -1892,7 +1888,7 @@ int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
 	if (obd_dump_on_timeout)
 		libcfs_debug_dumplog();
 
-	if (imp == NULL) {
+	if (!imp) {
 		DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
 		return 1;
 	}
@@ -1945,8 +1941,6 @@ int ptlrpc_expired_set(void *data)
 	struct list_head *tmp;
 	time64_t now = ktime_get_real_seconds();
 
-	LASSERT(set != NULL);
-
 	/* A timeout expired. See which reqs it applies to...  */
 	list_for_each(tmp, &set->set_requests) {
 		struct ptlrpc_request *req =
@@ -2003,7 +1997,6 @@ void ptlrpc_interrupted_set(void *data)
 	struct ptlrpc_request_set *set = data;
 	struct list_head *tmp;
 
-	LASSERT(set != NULL);
 	CDEBUG(D_RPCTRACE, "INTERRUPTED SET %p\n", set);
 
 	list_for_each(tmp, &set->set_requests) {
@@ -2175,7 +2168,7 @@ int ptlrpc_set_wait(struct ptlrpc_request_set *set)
 			rc = req->rq_status;
 	}
 
-	if (set->set_interpret != NULL) {
+	if (set->set_interpret) {
 		int (*interpreter)(struct ptlrpc_request_set *set, void *, int) =
 			set->set_interpret;
 		rc = interpreter(set, set->set_arg, rc);
@@ -2207,10 +2200,10 @@ EXPORT_SYMBOL(ptlrpc_set_wait);
  */
 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
 {
-	if (request == NULL)
+	if (!request)
 		return;
 	LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
-	LASSERTF(request->rq_rqbd == NULL, "req %p\n", request);/* client-side */
+	LASSERTF(!request->rq_rqbd, "req %p\n", request);/* client-side */
 	LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
 	LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
 	LASSERTF(list_empty(&request->rq_exp_list), "req %p\n", request);
@@ -2222,7 +2215,7 @@ static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
 	 * We must take it off the imp_replay_list first.  Otherwise, we'll set
 	 * request->rq_reqmsg to NULL while osc_close is dereferencing it.
 	 */
-	if (request->rq_import != NULL) {
+	if (request->rq_import) {
 		if (!locked)
 			spin_lock(&request->rq_import->imp_lock);
 		list_del_init(&request->rq_replay_list);
@@ -2237,20 +2230,20 @@ static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
 		LBUG();
 	}
 
-	if (request->rq_repbuf != NULL)
+	if (request->rq_repbuf)
 		sptlrpc_cli_free_repbuf(request);
-	if (request->rq_export != NULL) {
+	if (request->rq_export) {
 		class_export_put(request->rq_export);
 		request->rq_export = NULL;
 	}
-	if (request->rq_import != NULL) {
+	if (request->rq_import) {
 		class_import_put(request->rq_import);
 		request->rq_import = NULL;
 	}
-	if (request->rq_bulk != NULL)
+	if (request->rq_bulk)
 		ptlrpc_free_bulk_pin(request->rq_bulk);
 
-	if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
+	if (request->rq_reqbuf || request->rq_clrbuf)
 		sptlrpc_cli_free_reqbuf(request);
 
 	if (request->rq_cli_ctx)
@@ -2270,7 +2263,7 @@ static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
  */
 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
 {
-	if (request == NULL)
+	if (!request)
 		return 1;
 
 	if (request == LP_POISON ||
@@ -2352,7 +2345,7 @@ int ptlrpc_unregister_reply(struct ptlrpc_request *request, int async)
 	 * a chance to run reply_in_callback(), and to make sure we've
 	 * unlinked before returning a req to the pool.
 	 */
-	if (request->rq_set != NULL)
+	if (request->rq_set)
 		wq = &request->rq_set->set_waitq;
 	else
 		wq = &request->rq_reply_waitq;
@@ -2387,7 +2380,7 @@ static void ptlrpc_free_request(struct ptlrpc_request *req)
 	req->rq_replay = 0;
 	spin_unlock(&req->rq_lock);
 
-	if (req->rq_commit_cb != NULL)
+	if (req->rq_commit_cb)
 		req->rq_commit_cb(req);
 	list_del_init(&req->rq_replay_list);
 
@@ -2428,7 +2421,6 @@ void ptlrpc_free_committed(struct obd_import *imp)
 	struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
 	bool skip_committed_list = true;
 
-	LASSERT(imp != NULL);
 	assert_spin_locked(&imp->imp_lock);
 
 	if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
@@ -2612,11 +2604,11 @@ int ptlrpc_queue_wait(struct ptlrpc_request *req)
 	struct ptlrpc_request_set *set;
 	int rc;
 
-	LASSERT(req->rq_set == NULL);
+	LASSERT(!req->rq_set);
 	LASSERT(!req->rq_receiving_reply);
 
 	set = ptlrpc_prep_set();
-	if (set == NULL) {
+	if (!set) {
 		CERROR("Unable to allocate ptlrpc set.");
 		return -ENOMEM;
 	}
@@ -2848,8 +2840,6 @@ void ptlrpc_abort_set(struct ptlrpc_request_set *set)
 {
 	struct list_head *tmp, *pos;
 
-	LASSERT(set != NULL);
-
 	list_for_each_safe(pos, tmp, &set->set_requests) {
 		struct ptlrpc_request *req =
 			list_entry(pos, struct ptlrpc_request,
@@ -2995,7 +2985,6 @@ static int work_interpreter(const struct lu_env *env,
 	struct ptlrpc_work_async_args *arg = data;
 
 	LASSERT(ptlrpcd_check_work(req));
-	LASSERT(arg->cb != NULL);
 
 	rc = arg->cb(env, arg->cbdata);
 
@@ -3027,12 +3016,12 @@ void *ptlrpcd_alloc_work(struct obd_import *imp,
 
 	might_sleep();
 
-	if (cb == NULL)
+	if (!cb)
 		return ERR_PTR(-EINVAL);
 
 	/* copy some code from deprecated fakereq. */
 	req = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (req == NULL) {
+	if (!req) {
 		CERROR("ptlrpc: run out of memory!\n");
 		return ERR_PTR(-ENOMEM);
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/connection.c b/drivers/staging/lustre/lustre/ptlrpc/connection.c
index da1f0b1..062db13 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/connection.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/connection.c
@@ -172,7 +172,7 @@ conn_keycmp(const void *key, struct hlist_node *hnode)
 	struct ptlrpc_connection *conn;
 	const lnet_process_id_t *conn_key;
 
-	LASSERT(key != NULL);
+	LASSERT(key);
 	conn_key = key;
 	conn = hlist_entry(hnode, struct ptlrpc_connection, c_hash);
 
diff --git a/drivers/staging/lustre/lustre/ptlrpc/events.c b/drivers/staging/lustre/lustre/ptlrpc/events.c
index 07e76a2..64eaa0e 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/events.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/events.c
@@ -312,7 +312,7 @@ void request_in_callback(lnet_event_t *ev)
 			return;
 		}
 		req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
-		if (req == NULL) {
+		if (!req) {
 			CERROR("Can't allocate incoming request descriptor: Dropping %s RPC from %s\n",
 			       service->srv_name,
 			       libcfs_id2str(ev->initiator));
diff --git a/drivers/staging/lustre/lustre/ptlrpc/import.c b/drivers/staging/lustre/lustre/ptlrpc/import.c
index f752c78..bd0fa3c 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/import.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/import.c
@@ -553,7 +553,6 @@ static int import_select_connection(struct obd_import *imp)
 	imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
 
 	dlmexp = class_conn2export(&imp->imp_dlm_handle);
-	LASSERT(dlmexp != NULL);
 	ptlrpc_connection_put(dlmexp->exp_connection);
 	dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
 	class_export_put(dlmexp);
@@ -687,7 +686,7 @@ int ptlrpc_connect_import(struct obd_import *imp)
 		goto out;
 
 	request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
-	if (request == NULL) {
+	if (!request) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -817,7 +816,7 @@ static int ptlrpc_connect_interpret(const struct lu_env *env,
 	ocd = req_capsule_server_sized_get(&request->rq_pill,
 					   &RMF_CONNECT_DATA, ret);
 
-	if (ocd == NULL) {
+	if (!ocd) {
 		CERROR("%s: no connect data from server\n",
 		       imp->imp_obd->obd_name);
 		rc = -EPROTO;
@@ -1162,7 +1161,7 @@ out:
 			struct obd_connect_data *ocd;
 
 			/* reply message might not be ready */
-			if (request->rq_repmsg == NULL)
+			if (!request->rq_repmsg)
 				return -EPROTO;
 
 			ocd = req_capsule_server_get(&request->rq_pill,
@@ -1243,7 +1242,7 @@ static int signal_completed_replay(struct obd_import *imp)
 
 	req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
 					OBD_PING);
-	if (req == NULL) {
+	if (!req) {
 		atomic_dec(&imp->imp_replay_inflight);
 		return -ENOMEM;
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/layout.c b/drivers/staging/lustre/lustre/ptlrpc/layout.c
index c0e613c..9601b2a 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/layout.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/layout.c
@@ -1712,7 +1712,7 @@ void req_capsule_init(struct req_capsule *pill,
 	 * high-priority RPC queue getting peeked at before ost_handle()
 	 * handles an OST RPC.
 	 */
-	if (req != NULL && pill == &req->rq_pill && req->rq_pill_init)
+	if (req && pill == &req->rq_pill && req->rq_pill_init)
 		return;
 
 	memset(pill, 0, sizeof(*pill));
@@ -1720,7 +1720,7 @@ void req_capsule_init(struct req_capsule *pill,
 	pill->rc_loc = location;
 	req_capsule_init_area(pill);
 
-	if (req != NULL && pill == &req->rq_pill)
+	if (req && pill == &req->rq_pill)
 		req->rq_pill_init = 1;
 }
 EXPORT_SYMBOL(req_capsule_init);
@@ -1752,7 +1752,7 @@ static struct lustre_msg *__req_msg(const struct req_capsule *pill,
  */
 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
 {
-	LASSERT(pill->rc_fmt == NULL || pill->rc_fmt == fmt);
+	LASSERT(!pill->rc_fmt || pill->rc_fmt == fmt);
 	LASSERT(__req_format_is_sane(fmt));
 
 	pill->rc_fmt = fmt;
@@ -1773,8 +1773,6 @@ int req_capsule_filled_sizes(struct req_capsule *pill,
 	const struct req_format *fmt = pill->rc_fmt;
 	int i;
 
-	LASSERT(fmt != NULL);
-
 	for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
 		if (pill->rc_area[loc][i] == -1) {
 			pill->rc_area[loc][i] =
@@ -1810,7 +1808,7 @@ int req_capsule_server_pack(struct req_capsule *pill)
 
 	LASSERT(pill->rc_loc == RCL_SERVER);
 	fmt = pill->rc_fmt;
-	LASSERT(fmt != NULL);
+	LASSERT(fmt);
 
 	count = req_capsule_filled_sizes(pill, RCL_SERVER);
 	rc = lustre_pack_reply(pill->rc_req, count,
@@ -1865,7 +1863,7 @@ swabber_dumper_helper(struct req_capsule *pill,
 	swabber = swabber ?: field->rmf_swabber;
 
 	if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
-	    swabber != NULL && value != NULL)
+	    swabber && value)
 		do_swab = 1;
 	else
 		do_swab = 0;
@@ -1947,17 +1945,15 @@ static void *__req_capsule_get(struct req_capsule *pill,
 		[RCL_SERVER] = "server"
 	};
 
-	LASSERT(pill != NULL);
-	LASSERT(pill != LP_POISON);
 	fmt = pill->rc_fmt;
-	LASSERT(fmt != NULL);
+	LASSERT(fmt);
 	LASSERT(fmt != LP_POISON);
 	LASSERT(__req_format_is_sane(fmt));
 
 	offset = __req_capsule_offset(pill, field, loc);
 
 	msg = __req_msg(pill, loc);
-	LASSERT(msg != NULL);
+	LASSERT(msg);
 
 	getter = (field->rmf_flags & RMF_F_STRING) ?
 		(typeof(getter))lustre_msg_string : lustre_msg_buf;
@@ -1980,7 +1976,7 @@ static void *__req_capsule_get(struct req_capsule *pill,
 	}
 	value = getter(msg, offset, len);
 
-	if (value == NULL) {
+	if (!value) {
 		DEBUG_REQ(D_ERROR, pill->rc_req,
 			  "Wrong buffer for field `%s' (%d of %d) in format `%s': %d vs. %d (%s)\n",
 			  field->rmf_name, offset, lustre_msg_bufcount(msg),
@@ -2209,7 +2205,7 @@ void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
 
 	const struct req_format *old;
 
-	LASSERT(pill->rc_fmt != NULL);
+	LASSERT(pill->rc_fmt);
 	LASSERT(__req_format_is_sane(fmt));
 
 	old = pill->rc_fmt;
@@ -2222,7 +2218,7 @@ void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
 			const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
 
 			/* "opaque" fields can be transmogrified */
-			if (ofield->rmf_swabber == NULL &&
+			if (!ofield->rmf_swabber &&
 			    (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
 			    (ofield->rmf_size == -1 ||
 			    ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
@@ -2289,7 +2285,7 @@ void req_capsule_shrink(struct req_capsule *pill,
 	int offset;
 
 	fmt = pill->rc_fmt;
-	LASSERT(fmt != NULL);
+	LASSERT(fmt);
 	LASSERT(__req_format_is_sane(fmt));
 	LASSERT(req_capsule_has_field(pill, field, loc));
 	LASSERT(req_capsule_field_present(pill, field, loc));
diff --git a/drivers/staging/lustre/lustre/ptlrpc/llog_client.c b/drivers/staging/lustre/lustre/ptlrpc/llog_client.c
index e877020..8ef5e45 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/llog_client.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/llog_client.c
@@ -93,7 +93,7 @@ static int llog_client_open(const struct lu_env *env,
 	LASSERT(lgh);
 
 	req = ptlrpc_request_alloc(imp, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -130,7 +130,7 @@ static int llog_client_open(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
@@ -158,7 +158,7 @@ static int llog_client_next_block(const struct lu_env *env,
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 					LUSTRE_LOG_VERSION,
 					LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}
@@ -179,14 +179,14 @@ static int llog_client_next_block(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	/* The log records are swabbed as they are processed */
 	ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
-	if (ptr == NULL) {
+	if (!ptr) {
 		rc = -EFAULT;
 		goto out;
 	}
@@ -216,7 +216,7 @@ static int llog_client_prev_block(const struct lu_env *env,
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 					LUSTRE_LOG_VERSION,
 					LLOG_ORIGIN_HANDLE_PREV_BLOCK);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}
@@ -236,13 +236,13 @@ static int llog_client_prev_block(const struct lu_env *env,
 		goto out;
 
 	body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-	if (body == NULL) {
+	if (!body) {
 		rc = -EFAULT;
 		goto out;
 	}
 
 	ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
-	if (ptr == NULL) {
+	if (!ptr) {
 		rc = -EFAULT;
 		goto out;
 	}
@@ -269,7 +269,7 @@ static int llog_client_read_header(const struct lu_env *env,
 	req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 					LUSTRE_LOG_VERSION,
 					LLOG_ORIGIN_HANDLE_READ_HEADER);
-	if (req == NULL) {
+	if (!req) {
 		rc = -ENOMEM;
 		goto err_exit;
 	}
@@ -285,7 +285,7 @@ static int llog_client_read_header(const struct lu_env *env,
 		goto out;
 
 	hdr = req_capsule_server_get(&req->rq_pill, &RMF_LLOG_LOG_HDR);
-	if (hdr == NULL) {
+	if (!hdr) {
 		rc = -EFAULT;
 		goto out;
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/llog_net.c b/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
index dac66f5..fbccb62 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
@@ -58,7 +58,7 @@ int llog_initiator_connect(struct llog_ctxt *ctxt)
 
 	LASSERT(ctxt);
 	new_imp = ctxt->loc_obd->u.cli.cl_import;
-	LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == new_imp,
+	LASSERTF(!ctxt->loc_imp || ctxt->loc_imp == new_imp,
 		 "%p - %p\n", ctxt->loc_imp, new_imp);
 	mutex_lock(&ctxt->loc_mutex);
 	if (ctxt->loc_imp != new_imp) {
diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
index cc55b79..a4a857f 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
@@ -192,15 +192,15 @@ ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 	unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
 					  LPROCFS_CNTR_STDDEV;
 
-	LASSERT(*debugfs_root_ret == NULL);
-	LASSERT(*stats_ret == NULL);
+	LASSERT(!*debugfs_root_ret);
+	LASSERT(!*stats_ret);
 
 	svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,
 					0);
-	if (svc_stats == NULL)
+	if (!svc_stats)
 		return;
 
-	if (dir != NULL) {
+	if (dir) {
 		svc_debugfs_entry = ldebugfs_register(dir, root, NULL, NULL);
 		if (IS_ERR(svc_debugfs_entry)) {
 			lprocfs_free_stats(&svc_stats);
@@ -246,11 +246,11 @@ ptlrpc_ldebugfs_register(struct dentry *root, char *dir,
 
 	rc = ldebugfs_register_stats(svc_debugfs_entry, name, svc_stats);
 	if (rc < 0) {
-		if (dir != NULL)
+		if (dir)
 			ldebugfs_remove(&svc_debugfs_entry);
 		lprocfs_free_stats(&svc_stats);
 	} else {
-		if (dir != NULL)
+		if (dir)
 			*debugfs_root_ret = svc_debugfs_entry;
 		*stats_ret = svc_stats;
 	}
@@ -456,8 +456,6 @@ static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
 static void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
 				struct ptlrpc_nrs_pol_info *info)
 {
-	LASSERT(policy != NULL);
-	LASSERT(info != NULL);
 	assert_spin_locked(&policy->pol_nrs->nrs_lock);
 
 	memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
@@ -508,7 +506,7 @@ static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
 	spin_unlock(&nrs->nrs_lock);
 
 	infos = kcalloc(num_pols, sizeof(*infos), GFP_NOFS);
-	if (infos == NULL) {
+	if (!infos) {
 		rc = -ENOMEM;
 		goto unlock;
 	}
@@ -676,7 +674,7 @@ static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
 	/**
 	 * No [reg|hp] token has been specified
 	 */
-	if (cmd == NULL)
+	if (!cmd)
 		goto default_queue;
 
 	/**
@@ -733,8 +731,7 @@ ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
 	struct list_head *e;
 	struct ptlrpc_request *req;
 
-	if (srhi->srhi_req != NULL &&
-	    srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
+	if (srhi->srhi_req && srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
 	    srhi->srhi_seq <= seq) {
 		/* If srhi_req was set previously, hasn't been culled and
 		 * we're searching for a seq on or after it (i.e. more
@@ -927,7 +924,7 @@ static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
 			   (s64)req->rq_arrival_time.tv_sec,
 			   (long)(req->rq_sent - req->rq_arrival_time.tv_sec),
 			   (long)(req->rq_sent - req->rq_deadline));
-		if (svc->srv_ops.so_req_printer == NULL)
+		if (!svc->srv_ops.so_req_printer)
 			seq_putc(s, '\n');
 		else
 			svc->srv_ops.so_req_printer(s, srhi->srhi_req);
@@ -1103,7 +1100,7 @@ void ptlrpc_ldebugfs_register_service(struct dentry *entry,
 				 "stats", &svc->srv_debugfs_entry,
 				 &svc->srv_stats);
 
-	if (svc->srv_debugfs_entry == NULL)
+	if (IS_ERR_OR_NULL(svc->srv_debugfs_entry))
 		return;
 
 	ldebugfs_add_vars(svc->srv_debugfs_entry, lproc_vars, NULL);
@@ -1129,7 +1126,7 @@ void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
 	int opc = opcode_offset(op);
 
 	svc_stats = req->rq_import->imp_obd->obd_svc_stats;
-	if (svc_stats == NULL || opc <= 0)
+	if (!svc_stats || opc <= 0)
 		return;
 	LASSERT(opc < LUSTRE_MAX_OPCODES);
 	if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
@@ -1166,7 +1163,7 @@ EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
 
 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
 {
-	if (svc->srv_debugfs_entry != NULL)
+	if (!IS_ERR_OR_NULL(svc->srv_debugfs_entry))
 		ldebugfs_remove(&svc->srv_debugfs_entry);
 
 	if (svc->srv_stats)
@@ -1198,7 +1195,7 @@ int lprocfs_wr_ping(struct file *file, const char __user *buffer,
 
 	req = ptlrpc_prep_ping(obd->u.cli.cl_import);
 	up_read(&obd->u.cli.cl_sem);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req->rq_send_state = LUSTRE_IMP_FULL;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c
index c5d7ff5..4cce26d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c
@@ -56,7 +56,6 @@ static int ptl_send_buf(lnet_handle_md_t *mdh, void *base, int len,
 	lnet_md_t md;
 
 	LASSERT(portal != 0);
-	LASSERT(conn != NULL);
 	CDEBUG(D_INFO, "conn=%p id %s\n", conn, libcfs_id2str(conn->c_peer));
 	md.start = base;
 	md.length = len;
@@ -130,7 +129,7 @@ static int ptlrpc_register_bulk(struct ptlrpc_request *req)
 	LASSERT(desc->bd_md_count == 0);
 	LASSERT(desc->bd_md_max_brw <= PTLRPC_BULK_OPS_COUNT);
 	LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
-	LASSERT(desc->bd_req != NULL);
+	LASSERT(desc->bd_req);
 	LASSERT(desc->bd_type == BULK_PUT_SINK ||
 		desc->bd_type == BULK_GET_SOURCE);
 
@@ -273,7 +272,7 @@ int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async)
 	if (async)
 		return 0;
 
-	if (req->rq_set != NULL)
+	if (req->rq_set)
 		wq = &req->rq_set->set_waitq;
 	else
 		wq = &req->rq_reply_waitq;
@@ -305,8 +304,7 @@ static void ptlrpc_at_set_reply(struct ptlrpc_request *req, int flags)
 				 req->rq_arrival_time.tv_sec, 1);
 
 	if (!(flags & PTLRPC_REPLY_EARLY) &&
-	    (req->rq_type != PTL_RPC_MSG_ERR) &&
-	    (req->rq_reqmsg != NULL) &&
+	    (req->rq_type != PTL_RPC_MSG_ERR) && req->rq_reqmsg &&
 	    !(lustre_msg_get_flags(req->rq_reqmsg) &
 	      (MSG_RESENT | MSG_REPLAY |
 	       MSG_REQ_REPLAY_DONE | MSG_LOCK_REPLAY_DONE))) {
@@ -360,10 +358,10 @@ int ptlrpc_send_reply(struct ptlrpc_request *req, int flags)
 	 * target_queue_final_reply().
 	 */
 	LASSERT(req->rq_no_reply == 0);
-	LASSERT(req->rq_reqbuf != NULL);
-	LASSERT(rs != NULL);
+	LASSERT(req->rq_reqbuf);
+	LASSERT(rs);
 	LASSERT((flags & PTLRPC_REPLY_MAYBE_DIFFICULT) || !rs->rs_difficult);
-	LASSERT(req->rq_repmsg != NULL);
+	LASSERT(req->rq_repmsg);
 	LASSERT(req->rq_repmsg == rs->rs_msg);
 	LASSERT(rs->rs_cb_id.cbid_fn == reply_out_callback);
 	LASSERT(rs->rs_cb_id.cbid_arg == rs);
@@ -403,12 +401,12 @@ int ptlrpc_send_reply(struct ptlrpc_request *req, int flags)
 
 	ptlrpc_at_set_reply(req, flags);
 
-	if (req->rq_export == NULL || req->rq_export->exp_connection == NULL)
+	if (!req->rq_export || !req->rq_export->exp_connection)
 		conn = ptlrpc_connection_get(req->rq_peer, req->rq_self, NULL);
 	else
 		conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
 
-	if (unlikely(conn == NULL)) {
+	if (unlikely(!conn)) {
 		CERROR("not replying on NULL connection\n"); /* bug 9635 */
 		return -ENOTCONN;
 	}
@@ -503,7 +501,7 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 	LASSERT(!((lustre_msg_get_flags(request->rq_reqmsg) & MSG_REPLAY) &&
 		(request->rq_import->imp_state == LUSTRE_IMP_FULL)));
 
-	if (unlikely(obd != NULL && obd->obd_fail)) {
+	if (unlikely(obd && obd->obd_fail)) {
 		CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
 			obd->obd_name);
 		/* this prevents us from waiting in ptlrpc_queue_wait */
@@ -535,7 +533,7 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 		goto out;
 
 	/* bulk register should be done after wrap_request() */
-	if (request->rq_bulk != NULL) {
+	if (request->rq_bulk) {
 		rc = ptlrpc_register_bulk(request);
 		if (rc != 0)
 			goto out;
@@ -543,9 +541,9 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 
 	if (!noreply) {
 		LASSERT(request->rq_replen != 0);
-		if (request->rq_repbuf == NULL) {
-			LASSERT(request->rq_repdata == NULL);
-			LASSERT(request->rq_repmsg == NULL);
+		if (!request->rq_repbuf) {
+			LASSERT(!request->rq_repdata);
+			LASSERT(!request->rq_repmsg);
 			rc = sptlrpc_cli_alloc_repbuf(request,
 						      request->rq_replen);
 			if (rc) {
@@ -623,7 +621,7 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 
 	/* add references on request for request_out_callback */
 	ptlrpc_request_addref(request);
-	if (obd != NULL && obd->obd_svc_stats != NULL)
+	if (obd && obd->obd_svc_stats)
 		lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
 			atomic_read(&request->rq_import->imp_inflight));
 
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs.c b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
index 57acf8c..ed40be6 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
@@ -57,7 +57,7 @@ struct nrs_core nrs_core;
 
 static int nrs_policy_init(struct ptlrpc_nrs_policy *policy)
 {
-	return policy->pol_desc->pd_ops->op_policy_init != NULL ?
+	return policy->pol_desc->pd_ops->op_policy_init ?
 	       policy->pol_desc->pd_ops->op_policy_init(policy) : 0;
 }
 
@@ -66,7 +66,7 @@ static void nrs_policy_fini(struct ptlrpc_nrs_policy *policy)
 	LASSERT(policy->pol_ref == 0);
 	LASSERT(policy->pol_req_queued == 0);
 
-	if (policy->pol_desc->pd_ops->op_policy_fini != NULL)
+	if (policy->pol_desc->pd_ops->op_policy_fini)
 		policy->pol_desc->pd_ops->op_policy_fini(policy);
 }
 
@@ -82,7 +82,7 @@ static int nrs_policy_ctl_locked(struct ptlrpc_nrs_policy *policy,
 	if (policy->pol_state == NRS_POL_STATE_STOPPED)
 		return -ENODEV;
 
-	return policy->pol_desc->pd_ops->op_policy_ctl != NULL ?
+	return policy->pol_desc->pd_ops->op_policy_ctl ?
 	       policy->pol_desc->pd_ops->op_policy_ctl(policy, opc, arg) :
 	       -ENOSYS;
 }
@@ -91,7 +91,7 @@ static void nrs_policy_stop0(struct ptlrpc_nrs_policy *policy)
 {
 	struct ptlrpc_nrs *nrs = policy->pol_nrs;
 
-	if (policy->pol_desc->pd_ops->op_policy_stop != NULL) {
+	if (policy->pol_desc->pd_ops->op_policy_stop) {
 		spin_unlock(&nrs->nrs_lock);
 
 		policy->pol_desc->pd_ops->op_policy_stop(policy);
@@ -154,7 +154,7 @@ static void nrs_policy_stop_primary(struct ptlrpc_nrs *nrs)
 {
 	struct ptlrpc_nrs_policy *tmp = nrs->nrs_policy_primary;
 
-	if (tmp == NULL)
+	if (!tmp)
 		return;
 
 	nrs->nrs_policy_primary = NULL;
@@ -220,12 +220,12 @@ static int nrs_policy_start_locked(struct ptlrpc_nrs_policy *policy)
 		 * nrs_policy_flags::PTLRPC_NRS_FL_FALLBACK flag set can
 		 * register with NRS core.
 		 */
-		LASSERT(nrs->nrs_policy_fallback == NULL);
+		LASSERT(!nrs->nrs_policy_fallback);
 	} else {
 		/**
 		 * Shouldn't start primary policy if w/o fallback policy.
 		 */
-		if (nrs->nrs_policy_fallback == NULL)
+		if (!nrs->nrs_policy_fallback)
 			return -EPERM;
 
 		if (policy->pol_state == NRS_POL_STATE_STARTED)
@@ -348,10 +348,10 @@ static void nrs_resource_put(struct ptlrpc_nrs_resource *res)
 {
 	struct ptlrpc_nrs_policy *policy = res->res_policy;
 
-	if (policy->pol_desc->pd_ops->op_res_put != NULL) {
+	if (policy->pol_desc->pd_ops->op_res_put) {
 		struct ptlrpc_nrs_resource *parent;
 
-		for (; res != NULL; res = parent) {
+		for (; res; res = parent) {
 			parent = res->res_parent;
 			policy->pol_desc->pd_ops->op_res_put(policy, res);
 		}
@@ -390,12 +390,11 @@ struct ptlrpc_nrs_resource *nrs_resource_get(struct ptlrpc_nrs_policy *policy,
 		rc = policy->pol_desc->pd_ops->op_res_get(policy, nrq, res,
 							  &tmp, moving_req);
 		if (rc < 0) {
-			if (res != NULL)
+			if (res)
 				nrs_resource_put(res);
 			return NULL;
 		}
 
-		LASSERT(tmp != NULL);
 		tmp->res_parent = res;
 		tmp->res_policy = policy;
 		res = tmp;
@@ -445,7 +444,7 @@ static void nrs_resource_get_safe(struct ptlrpc_nrs *nrs,
 	nrs_policy_get_locked(fallback);
 
 	primary = nrs->nrs_policy_primary;
-	if (primary != NULL)
+	if (primary)
 		nrs_policy_get_locked(primary);
 
 	spin_unlock(&nrs->nrs_lock);
@@ -454,9 +453,9 @@ static void nrs_resource_get_safe(struct ptlrpc_nrs *nrs,
 	 * Obtain resource hierarchy references.
 	 */
 	resp[NRS_RES_FALLBACK] = nrs_resource_get(fallback, nrq, moving_req);
-	LASSERT(resp[NRS_RES_FALLBACK] != NULL);
+	LASSERT(resp[NRS_RES_FALLBACK]);
 
-	if (primary != NULL) {
+	if (primary) {
 		resp[NRS_RES_PRIMARY] = nrs_resource_get(primary, nrq,
 							 moving_req);
 		/**
@@ -465,7 +464,7 @@ static void nrs_resource_get_safe(struct ptlrpc_nrs *nrs,
 		 * reference on the policy as it will not be used for this
 		 * request.
 		 */
-		if (resp[NRS_RES_PRIMARY] == NULL)
+		if (!resp[NRS_RES_PRIMARY])
 			nrs_policy_put(primary);
 	}
 }
@@ -485,7 +484,7 @@ static void nrs_resource_put_safe(struct ptlrpc_nrs_resource **resp)
 	int i;
 
 	for (i = 0; i < NRS_RES_MAX; i++) {
-		if (resp[i] != NULL) {
+		if (resp[i]) {
 			pols[i] = resp[i]->res_policy;
 			nrs_resource_put(resp[i]);
 			resp[i] = NULL;
@@ -526,7 +525,7 @@ struct ptlrpc_nrs_request *nrs_request_get(struct ptlrpc_nrs_policy *policy,
 
 	nrq = policy->pol_desc->pd_ops->op_req_get(policy, peek, force);
 
-	LASSERT(ergo(nrq != NULL, nrs_request_policy(nrq) == policy));
+	LASSERT(ergo(nrq, nrs_request_policy(nrq) == policy));
 
 	return nrq;
 }
@@ -552,7 +551,7 @@ static inline void nrs_request_enqueue(struct ptlrpc_nrs_request *nrq)
 	 * the preferred choice.
 	 */
 	for (i = NRS_RES_MAX - 1; i >= 0; i--) {
-		if (nrq->nr_res_ptrs[i] == NULL)
+		if (!nrq->nr_res_ptrs[i])
 			continue;
 
 		nrq->nr_res_idx = i;
@@ -622,7 +621,7 @@ static int nrs_policy_ctl(struct ptlrpc_nrs *nrs, char *name,
 	spin_lock(&nrs->nrs_lock);
 
 	policy = nrs_policy_find_locked(nrs, name);
-	if (policy == NULL) {
+	if (!policy) {
 		rc = -ENOENT;
 		goto out;
 	}
@@ -644,7 +643,7 @@ static int nrs_policy_ctl(struct ptlrpc_nrs *nrs, char *name,
 		break;
 	}
 out:
-	if (policy != NULL)
+	if (policy)
 		nrs_policy_put_locked(policy);
 
 	spin_unlock(&nrs->nrs_lock);
@@ -669,7 +668,7 @@ static int nrs_policy_unregister(struct ptlrpc_nrs *nrs, char *name)
 	spin_lock(&nrs->nrs_lock);
 
 	policy = nrs_policy_find_locked(nrs, name);
-	if (policy == NULL) {
+	if (!policy) {
 		spin_unlock(&nrs->nrs_lock);
 
 		CERROR("Can't find NRS policy %s\n", name);
@@ -702,7 +701,7 @@ static int nrs_policy_unregister(struct ptlrpc_nrs *nrs, char *name)
 
 	nrs_policy_fini(policy);
 
-	LASSERT(policy->pol_private == NULL);
+	LASSERT(!policy->pol_private);
 	kfree(policy);
 
 	return 0;
@@ -726,18 +725,16 @@ static int nrs_policy_register(struct ptlrpc_nrs *nrs,
 	struct ptlrpc_service_part *svcpt = nrs->nrs_svcpt;
 	int rc;
 
-	LASSERT(svcpt != NULL);
-	LASSERT(desc->pd_ops != NULL);
-	LASSERT(desc->pd_ops->op_res_get != NULL);
-	LASSERT(desc->pd_ops->op_req_get != NULL);
-	LASSERT(desc->pd_ops->op_req_enqueue != NULL);
-	LASSERT(desc->pd_ops->op_req_dequeue != NULL);
-	LASSERT(desc->pd_compat != NULL);
+	LASSERT(desc->pd_ops->op_res_get);
+	LASSERT(desc->pd_ops->op_req_get);
+	LASSERT(desc->pd_ops->op_req_enqueue);
+	LASSERT(desc->pd_ops->op_req_dequeue);
+	LASSERT(desc->pd_compat);
 
 	policy = kzalloc_node(sizeof(*policy), GFP_NOFS,
 			cfs_cpt_spread_node(svcpt->scp_service->srv_cptable,
 					    svcpt->scp_cpt));
-	if (policy == NULL)
+	if (!policy)
 		return -ENOMEM;
 
 	policy->pol_nrs = nrs;
@@ -757,7 +754,7 @@ static int nrs_policy_register(struct ptlrpc_nrs *nrs,
 	spin_lock(&nrs->nrs_lock);
 
 	tmp = nrs_policy_find_locked(nrs, policy->pol_desc->pd_name);
-	if (tmp != NULL) {
+	if (tmp) {
 		CERROR("NRS policy %s has been registered, can't register it for %s\n",
 		       policy->pol_desc->pd_name,
 		       svcpt->scp_service->srv_name);
@@ -947,14 +944,14 @@ static int nrs_svcpt_setup_locked(struct ptlrpc_service_part *svcpt)
 	/**
 	 * Optionally allocate a high-priority NRS head.
 	 */
-	if (svcpt->scp_service->srv_ops.so_hpreq_handler == NULL)
+	if (!svcpt->scp_service->srv_ops.so_hpreq_handler)
 		goto out;
 
 	svcpt->scp_nrs_hp =
 		kzalloc_node(sizeof(*svcpt->scp_nrs_hp), GFP_NOFS,
 			cfs_cpt_spread_node(svcpt->scp_service->srv_cptable,
 					    svcpt->scp_cpt));
-	if (svcpt->scp_nrs_hp == NULL) {
+	if (!svcpt->scp_nrs_hp) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -1079,7 +1076,7 @@ again:
 			}
 		}
 
-		if (desc->pd_ops->op_lprocfs_fini != NULL)
+		if (desc->pd_ops->op_lprocfs_fini)
 			desc->pd_ops->op_lprocfs_fini(svc);
 	}
 
@@ -1107,13 +1104,12 @@ static int ptlrpc_nrs_policy_register(struct ptlrpc_nrs_pol_conf *conf)
 	struct ptlrpc_nrs_pol_desc *desc;
 	int rc = 0;
 
-	LASSERT(conf != NULL);
-	LASSERT(conf->nc_ops != NULL);
-	LASSERT(conf->nc_compat != NULL);
+	LASSERT(conf->nc_ops);
+	LASSERT(conf->nc_compat);
 	LASSERT(ergo(conf->nc_compat == nrs_policy_compat_one,
-		conf->nc_compat_svc_name != NULL));
+		conf->nc_compat_svc_name));
 	LASSERT(ergo((conf->nc_flags & PTLRPC_NRS_FL_REG_EXTERN) != 0,
-		     conf->nc_owner != NULL));
+		     conf->nc_owner));
 
 	conf->nc_name[NRS_POL_NAME_MAX - 1] = '\0';
 
@@ -1136,7 +1132,7 @@ static int ptlrpc_nrs_policy_register(struct ptlrpc_nrs_pol_conf *conf)
 
 	mutex_lock(&nrs_core.nrs_mutex);
 
-	if (nrs_policy_find_desc_locked(conf->nc_name) != NULL) {
+	if (nrs_policy_find_desc_locked(conf->nc_name)) {
 		CERROR("NRS: failing to register policy %s which has already been registered with NRS core!\n",
 		       conf->nc_name);
 		rc = -EEXIST;
@@ -1214,7 +1210,7 @@ again:
 		 * No need to take a reference to other modules here, as we
 		 * will be calling from the module's init() function.
 		 */
-		if (desc->pd_ops->op_lprocfs_init != NULL) {
+		if (desc->pd_ops->op_lprocfs_init) {
 			rc = desc->pd_ops->op_lprocfs_init(svc);
 			if (rc != 0) {
 				rc2 = nrs_policy_unregister_locked(desc);
@@ -1278,7 +1274,7 @@ int ptlrpc_service_nrs_setup(struct ptlrpc_service *svc)
 		if (!nrs_policy_compatible(svc, desc))
 			continue;
 
-		if (desc->pd_ops->op_lprocfs_init != NULL) {
+		if (desc->pd_ops->op_lprocfs_init) {
 			rc = desc->pd_ops->op_lprocfs_init(svc);
 			if (rc != 0)
 				goto failed;
@@ -1319,7 +1315,7 @@ void ptlrpc_service_nrs_cleanup(struct ptlrpc_service *svc)
 		if (!nrs_policy_compatible(svc, desc))
 			continue;
 
-		if (desc->pd_ops->op_lprocfs_fini != NULL)
+		if (desc->pd_ops->op_lprocfs_fini)
 			desc->pd_ops->op_lprocfs_fini(svc);
 	}
 
@@ -1459,7 +1455,7 @@ ptlrpc_nrs_req_get_nolock0(struct ptlrpc_service_part *svcpt, bool hp,
 	list_for_each_entry(policy, &nrs->nrs_policy_queued,
 				pol_list_queued) {
 		nrq = nrs_request_get(policy, peek, force);
-		if (nrq != NULL) {
+		if (nrq) {
 			if (likely(!peek)) {
 				nrq->nr_started = 1;
 
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
index 8e21f0c..77894f8 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
@@ -83,7 +83,7 @@ static int nrs_fifo_start(struct ptlrpc_nrs_policy *policy)
 	head = kzalloc_node(sizeof(*head), GFP_NOFS,
 			    cfs_cpt_spread_node(nrs_pol2cptab(policy),
 						nrs_pol2cptid(policy)));
-	if (head == NULL)
+	if (!head)
 		return -ENOMEM;
 
 	INIT_LIST_HEAD(&head->fh_list);
@@ -104,7 +104,7 @@ static void nrs_fifo_stop(struct ptlrpc_nrs_policy *policy)
 {
 	struct nrs_fifo_head *head = policy->pol_private;
 
-	LASSERT(head != NULL);
+	LASSERT(head);
 	LASSERT(list_empty(&head->fh_list));
 
 	kfree(head);
@@ -169,7 +169,7 @@ struct ptlrpc_nrs_request *nrs_fifo_req_get(struct ptlrpc_nrs_policy *policy,
 	      list_entry(head->fh_list.next, struct ptlrpc_nrs_request,
 			     nr_u.fifo.fr_list);
 
-	if (likely(!peek && nrq != NULL)) {
+	if (likely(!peek && nrq)) {
 		struct ptlrpc_request *req = container_of(nrq,
 							  struct ptlrpc_request,
 							  rq_nrq);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c b/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c
index f3cb518..36a6ece 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/pack_generic.c
@@ -183,7 +183,7 @@ void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, __u32 *lens,
 	for (i = 0; i < count; i++)
 		msg->lm_buflens[i] = lens[i];
 
-	if (bufs == NULL)
+	if (!bufs)
 		return;
 
 	ptr = (char *)msg + lustre_msg_hdr_size_v2(count);
@@ -306,7 +306,7 @@ int lustre_pack_reply_v2(struct ptlrpc_request *req, int count,
 	struct ptlrpc_reply_state *rs;
 	int msg_len, rc;
 
-	LASSERT(req->rq_reply_state == NULL);
+	LASSERT(!req->rq_reply_state);
 
 	if ((flags & LPRFL_EARLY_REPLY) == 0) {
 		spin_lock(&req->rq_lock);
@@ -383,7 +383,6 @@ void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, int n, int min_size)
 {
 	int i, offset, buflen, bufcount;
 
-	LASSERT(m != NULL);
 	LASSERT(n >= 0);
 
 	bufcount = m->lm_bufcount;
@@ -488,7 +487,7 @@ void lustre_free_reply_state(struct ptlrpc_reply_state *rs)
 	LASSERT(!rs->rs_difficult || rs->rs_handled);
 	LASSERT(!rs->rs_on_net);
 	LASSERT(!rs->rs_scheduled);
-	LASSERT(rs->rs_export == NULL);
+	LASSERT(!rs->rs_export);
 	LASSERT(rs->rs_nlocks == 0);
 	LASSERT(list_empty(&rs->rs_exp_list));
 	LASSERT(list_empty(&rs->rs_obd_list));
@@ -705,7 +704,7 @@ char *lustre_msg_string(struct lustre_msg *m, int index, int max_len)
 		LASSERTF(0, "incorrect message magic: %08x\n", m->lm_magic);
 	}
 
-	if (str == NULL) {
+	if (!str) {
 		CERROR("can't unpack string in msg %p buffer[%d]\n", m, index);
 		return NULL;
 	}
@@ -740,7 +739,6 @@ static inline void *__lustre_swab_buf(struct lustre_msg *msg, int index,
 {
 	void *ptr = NULL;
 
-	LASSERT(msg != NULL);
 	switch (msg->lm_magic) {
 	case LUSTRE_MSG_MAGIC_V2:
 		ptr = lustre_msg_buf_v2(msg, index, min_size);
@@ -1377,7 +1375,7 @@ void lustre_msg_set_jobid(struct lustre_msg *msg, char *jobid)
 				       sizeof(struct ptlrpc_body));
 		LASSERTF(pb, "invalid msg %p: no ptlrpc body!\n", msg);
 
-		if (jobid != NULL)
+		if (jobid)
 			memcpy(pb->pb_jobid, jobid, JOBSTATS_JOBID_SIZE);
 		else if (pb->pb_jobid[0] == '\0')
 			lustre_get_jobid(pb->pb_jobid);
@@ -1427,7 +1425,7 @@ int do_set_info_async(struct obd_import *imp,
 	int rc;
 
 	req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
diff --git a/drivers/staging/lustre/lustre/ptlrpc/pinger.c b/drivers/staging/lustre/lustre/ptlrpc/pinger.c
index fb2d523..aae9b52 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/pinger.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/pinger.c
@@ -68,7 +68,7 @@ int ptlrpc_obd_ping(struct obd_device *obd)
 	struct ptlrpc_request *req;
 
 	req = ptlrpc_prep_ping(obd->u.cli.cl_import);
-	if (req == NULL)
+	if (!req)
 		return -ENOMEM;
 
 	req->rq_send_state = LUSTRE_IMP_FULL;
@@ -86,7 +86,7 @@ static int ptlrpc_ping(struct obd_import *imp)
 	struct ptlrpc_request *req;
 
 	req = ptlrpc_prep_ping(imp);
-	if (req == NULL) {
+	if (!req) {
 		CERROR("OOM trying to ping %s->%s\n",
 		       imp->imp_obd->obd_uuid.uuid,
 		       obd2cli_tgt(imp->imp_obd));
@@ -489,7 +489,6 @@ int ptlrpc_del_timeout_client(struct list_head *obd_list,
 			break;
 		}
 	}
-	LASSERTF(ti != NULL, "ti is NULL !\n");
 	if (list_empty(&ti->ti_obd_list)) {
 		list_del(&ti->ti_chain);
 		kfree(ti);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c b/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
index 60fb0ce..f847383 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
@@ -163,8 +163,6 @@ void ptlrpcd_wake(struct ptlrpc_request *req)
 {
 	struct ptlrpc_request_set *rq_set = req->rq_set;
 
-	LASSERT(rq_set != NULL);
-
 	wake_up(&rq_set->set_waitq);
 }
 EXPORT_SYMBOL(ptlrpcd_wake);
@@ -176,7 +174,7 @@ ptlrpcd_select_pc(struct ptlrpc_request *req)
 	int		cpt;
 	int		idx;
 
-	if (req != NULL && req->rq_send_state != LUSTRE_IMP_FULL)
+	if (req && req->rq_send_state != LUSTRE_IMP_FULL)
 		return &ptlrpcd_rcv;
 
 	cpt = cfs_cpt_current(cfs_cpt_table, 1);
@@ -240,7 +238,7 @@ void ptlrpcd_add_req(struct ptlrpc_request *req)
 
 		req->rq_invalid_rqset = 0;
 		spin_unlock(&req->rq_lock);
-		l_wait_event(req->rq_set_waitq, (req->rq_set == NULL), &lwi);
+		l_wait_event(req->rq_set_waitq, !req->rq_set, &lwi);
 	} else if (req->rq_set) {
 		/* If we have a valid "rq_set", just reuse it to avoid double
 		 * linked. */
@@ -349,12 +347,12 @@ static int ptlrpcd_check(struct lu_env *env, struct ptlrpcd_ctl *pc)
 				partner = pc->pc_partners[pc->pc_cursor++];
 				if (pc->pc_cursor >= pc->pc_npartners)
 					pc->pc_cursor = 0;
-				if (partner == NULL)
+				if (!partner)
 					continue;
 
 				spin_lock(&partner->pc_lock);
 				ps = partner->pc_set;
-				if (ps == NULL) {
+				if (!ps) {
 					spin_unlock(&partner->pc_lock);
 					continue;
 				}
@@ -580,7 +578,7 @@ int ptlrpcd_start(struct ptlrpcd_ctl *pc)
 	return 0;
 
 out_set:
-	if (pc->pc_set != NULL) {
+	if (pc->pc_set) {
 		struct ptlrpc_request_set *set = pc->pc_set;
 
 		spin_lock(&pc->pc_lock);
@@ -631,7 +629,7 @@ void ptlrpcd_free(struct ptlrpcd_ctl *pc)
 
 out:
 	if (pc->pc_npartners > 0) {
-		LASSERT(pc->pc_partners != NULL);
+		LASSERT(pc->pc_partners);
 
 		kfree(pc->pc_partners);
 		pc->pc_partners = NULL;
@@ -645,7 +643,7 @@ static void ptlrpcd_fini(void)
 	int i;
 	int j;
 
-	if (ptlrpcds != NULL) {
+	if (ptlrpcds) {
 		for (i = 0; i < ptlrpcds_num; i++) {
 			if (!ptlrpcds[i])
 				break;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/recover.c b/drivers/staging/lustre/lustre/ptlrpc/recover.c
index 4359cac..d923197 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/recover.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/recover.c
@@ -138,7 +138,7 @@ int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
 
 	/* All the requests in committed list have been replayed, let's replay
 	 * the imp_replay_list */
-	if (req == NULL) {
+	if (!req) {
 		list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
 			req = list_entry(tmp, struct ptlrpc_request,
 					 rq_replay_list);
@@ -153,14 +153,14 @@ int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
 	 * has occurred), then stop on the matching req and send it again.
 	 * If, however, the last sent transno has been committed then we
 	 * continue replay from the next request. */
-	if (req != NULL && imp->imp_resend_replay)
+	if (req && imp->imp_resend_replay)
 		lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
 
 	spin_lock(&imp->imp_lock);
 	imp->imp_resend_replay = 0;
 	spin_unlock(&imp->imp_lock);
 
-	if (req != NULL) {
+	if (req) {
 		rc = ptlrpc_replay_req(req);
 		if (rc) {
 			CERROR("recovery replay error %d for req %llu\n",
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec.c b/drivers/staging/lustre/lustre/ptlrpc/sec.c
index 39f5261..c91e131 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec.c
@@ -94,7 +94,7 @@ int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy)
 	LASSERT(number < SPTLRPC_POLICY_MAX);
 
 	write_lock(&policy_lock);
-	if (unlikely(policies[number] == NULL)) {
+	if (unlikely(!policies[number])) {
 		write_unlock(&policy_lock);
 		CERROR("%s: already unregistered\n", policy->sp_name);
 		return -EINVAL;
@@ -126,11 +126,11 @@ struct ptlrpc_sec_policy *sptlrpc_wireflavor2policy(__u32 flavor)
 		policy = policies[number];
 		if (policy && !try_module_get(policy->sp_owner))
 			policy = NULL;
-		if (policy == NULL)
+		if (!policy)
 			flag = atomic_read(&loaded);
 		read_unlock(&policy_lock);
 
-		if (policy != NULL || flag != 0 ||
+		if (policy || flag != 0 ||
 		    number != SPTLRPC_POLICY_GSS)
 			break;
 
@@ -327,7 +327,7 @@ static int import_sec_validate_get(struct obd_import *imp,
 	}
 
 	*sec = sptlrpc_import_sec_ref(imp);
-	if (*sec == NULL) {
+	if (!*sec) {
 		CERROR("import %p (%s) with no sec\n",
 		       imp, ptlrpc_import_state_name(imp->imp_state));
 		return -EACCES;
@@ -429,7 +429,7 @@ int sptlrpc_req_ctx_switch(struct ptlrpc_request *req,
 	reqmsg_size = req->rq_reqlen;
 	if (reqmsg_size != 0) {
 		reqmsg = libcfs_kvzalloc(reqmsg_size, GFP_NOFS);
-		if (reqmsg == NULL)
+		if (!reqmsg)
 			return -ENOMEM;
 		memcpy(reqmsg, req->rq_reqmsg, reqmsg_size);
 	}
@@ -938,7 +938,7 @@ static int do_cli_unwrap_reply(struct ptlrpc_request *req)
 	LASSERT(ctx->cc_sec);
 	LASSERT(req->rq_repbuf);
 	LASSERT(req->rq_repdata);
-	LASSERT(req->rq_repmsg == NULL);
+	LASSERT(!req->rq_repmsg);
 
 	req->rq_rep_swab_mask = 0;
 
@@ -1000,8 +1000,8 @@ static int do_cli_unwrap_reply(struct ptlrpc_request *req)
 int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req)
 {
 	LASSERT(req->rq_repbuf);
-	LASSERT(req->rq_repdata == NULL);
-	LASSERT(req->rq_repmsg == NULL);
+	LASSERT(!req->rq_repdata);
+	LASSERT(!req->rq_repmsg);
 	LASSERT(req->rq_reply_off + req->rq_nob_received <= req->rq_repbuf_len);
 
 	if (req->rq_reply_off == 0 &&
@@ -1046,13 +1046,13 @@ int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req,
 	int rc;
 
 	early_req = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (early_req == NULL)
+	if (!early_req)
 		return -ENOMEM;
 
 	early_size = req->rq_nob_received;
 	early_bufsz = size_roundup_power2(early_size);
 	early_buf = libcfs_kvzalloc(early_bufsz, GFP_NOFS);
-	if (early_buf == NULL) {
+	if (!early_buf) {
 		rc = -ENOMEM;
 		goto err_req;
 	}
@@ -1067,8 +1067,8 @@ int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req,
 	}
 
 	LASSERT(req->rq_repbuf);
-	LASSERT(req->rq_repdata == NULL);
-	LASSERT(req->rq_repmsg == NULL);
+	LASSERT(!req->rq_repdata);
+	LASSERT(!req->rq_repmsg);
 
 	if (req->rq_reply_off != 0) {
 		CERROR("early reply with offset %u\n", req->rq_reply_off);
@@ -1354,12 +1354,12 @@ int sptlrpc_import_sec_adapt(struct obd_import *imp,
 
 	might_sleep();
 
-	if (imp == NULL)
+	if (!imp)
 		return 0;
 
 	conn = imp->imp_connection;
 
-	if (svc_ctx == NULL) {
+	if (!svc_ctx) {
 		struct client_obd *cliobd = &imp->imp_obd->u.cli;
 		/*
 		 * normal import, determine flavor from rule set, except
@@ -1447,11 +1447,11 @@ static void import_flush_ctx_common(struct obd_import *imp,
 {
 	struct ptlrpc_sec *sec;
 
-	if (imp == NULL)
+	if (!imp)
 		return;
 
 	sec = sptlrpc_import_sec_ref(imp);
-	if (sec == NULL)
+	if (!sec)
 		return;
 
 	sec_cop_flush_ctx_cache(sec, uid, grace, force);
@@ -1484,7 +1484,7 @@ int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize)
 	LASSERT(ctx);
 	LASSERT(ctx->cc_sec);
 	LASSERT(ctx->cc_sec->ps_policy);
-	LASSERT(req->rq_reqmsg == NULL);
+	LASSERT(!req->rq_reqmsg);
 	LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
 	policy = ctx->cc_sec->ps_policy;
@@ -1515,7 +1515,7 @@ void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req)
 	LASSERT(ctx->cc_sec->ps_policy);
 	LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
-	if (req->rq_reqbuf == NULL && req->rq_clrbuf == NULL)
+	if (!req->rq_reqbuf && !req->rq_clrbuf)
 		return;
 
 	policy = ctx->cc_sec->ps_policy;
@@ -1632,7 +1632,7 @@ void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req)
 	LASSERT(ctx->cc_sec->ps_policy);
 	LASSERT_ATOMIC_POS(&ctx->cc_refcount);
 
-	if (req->rq_repbuf == NULL)
+	if (!req->rq_repbuf)
 		return;
 	LASSERT(req->rq_repbuf_len);
 
@@ -1684,12 +1684,12 @@ int sptlrpc_target_export_check(struct obd_export *exp,
 {
 	struct sptlrpc_flavor flavor;
 
-	if (exp == NULL)
+	if (!exp)
 		return 0;
 
 	/* client side export has no imp_reverse, skip
 	 * FIXME maybe we should check flavor this as well??? */
-	if (exp->exp_imp_reverse == NULL)
+	if (!exp->exp_imp_reverse)
 		return 0;
 
 	/* don't care about ctx fini rpc */
@@ -1915,9 +1915,9 @@ int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req)
 	int rc;
 
 	LASSERT(msg);
-	LASSERT(req->rq_reqmsg == NULL);
-	LASSERT(req->rq_repmsg == NULL);
-	LASSERT(req->rq_svc_ctx == NULL);
+	LASSERT(!req->rq_reqmsg);
+	LASSERT(!req->rq_repmsg);
+	LASSERT(!req->rq_svc_ctx);
 
 	req->rq_req_swab_mask = 0;
 
@@ -1994,7 +1994,7 @@ int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen)
 
 		/* failed alloc, try emergency pool */
 		rs = lustre_get_emerg_rs(svcpt);
-		if (rs == NULL)
+		if (!rs)
 			return -ENOMEM;
 
 		req->rq_reply_state = rs;
@@ -2059,7 +2059,7 @@ void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req)
 {
 	struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
 
-	if (ctx != NULL)
+	if (ctx)
 		atomic_inc(&ctx->sc_refcount);
 }
 
@@ -2067,7 +2067,7 @@ void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req)
 {
 	struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx;
 
-	if (ctx == NULL)
+	if (!ctx)
 		return;
 
 	LASSERT_ATOMIC_POS(&ctx->sc_refcount);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 52a6c51..ca04e65 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -195,7 +195,7 @@ static void enc_pools_release_free_pages(long npages)
 
 	while (npages--) {
 		LASSERT(page_pools.epp_pools[p_idx]);
-		LASSERT(page_pools.epp_pools[p_idx][g_idx] != NULL);
+		LASSERT(page_pools.epp_pools[p_idx][g_idx]);
 
 		__free_page(page_pools.epp_pools[p_idx][g_idx]);
 		page_pools.epp_pools[p_idx][g_idx] = NULL;
@@ -316,7 +316,7 @@ void sptlrpc_enc_pool_put_pages(struct ptlrpc_bulk_desc *desc)
 	int p_idx, g_idx;
 	int i;
 
-	if (desc->bd_enc_iov == NULL)
+	if (!desc->bd_enc_iov)
 		return;
 
 	LASSERT(desc->bd_iov_count > 0);
@@ -331,9 +331,9 @@ void sptlrpc_enc_pool_put_pages(struct ptlrpc_bulk_desc *desc)
 	LASSERT(page_pools.epp_pools[p_idx]);
 
 	for (i = 0; i < desc->bd_iov_count; i++) {
-		LASSERT(desc->bd_enc_iov[i].kiov_page != NULL);
+		LASSERT(desc->bd_enc_iov[i].kiov_page);
 		LASSERT(g_idx != 0 || page_pools.epp_pools[p_idx]);
-		LASSERT(page_pools.epp_pools[p_idx][g_idx] == NULL);
+		LASSERT(!page_pools.epp_pools[p_idx][g_idx]);
 
 		page_pools.epp_pools[p_idx][g_idx] =
 					desc->bd_enc_iov[i].kiov_page;
@@ -412,7 +412,7 @@ int sptlrpc_enc_pool_init(void)
 	page_pools.epp_st_max_wait = 0;
 
 	enc_pools_alloc();
-	if (page_pools.epp_pools == NULL)
+	if (!page_pools.epp_pools)
 		return -ENOMEM;
 
 	register_shrinker(&pools_shrinker);
@@ -475,7 +475,7 @@ int bulk_sec_desc_unpack(struct lustre_msg *msg, int offset, int swabbed)
 	int			  size = msg->lm_buflens[offset];
 
 	bsd = lustre_msg_buf(msg, offset, sizeof(*bsd));
-	if (bsd == NULL) {
+	if (!bsd) {
 		CERROR("Invalid bulk sec desc: size %d\n", size);
 		return -EINVAL;
 	}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_config.c b/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
index 4b0b81c..93b91bf 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_config.c
@@ -78,7 +78,7 @@ int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 
 	memset(flvr, 0, sizeof(*flvr));
 
-	if (str == NULL || str[0] == '\0') {
+	if (!str || str[0] == '\0') {
 		flvr->sf_rpc = SPTLRPC_FLVR_INVALID;
 		return 0;
 	}
@@ -103,7 +103,7 @@ int sptlrpc_parse_flavor(const char *str, struct sptlrpc_flavor *flvr)
 			 * format: plain-hash:<hash_alg>
 			 */
 			alg = strchr(bulk, ':');
-			if (alg == NULL)
+			if (!alg)
 				goto err_out;
 			*alg++ = '\0';
 
@@ -166,7 +166,7 @@ static int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 	sptlrpc_rule_init(rule);
 
 	flavor = strchr(param, '=');
-	if (flavor == NULL) {
+	if (!flavor) {
 		CERROR("invalid param, no '='\n");
 		return -EINVAL;
 	}
@@ -216,7 +216,7 @@ static int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 static void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 {
 	LASSERT(rset->srs_nslot ||
-		(rset->srs_nrule == 0 && rset->srs_rules == NULL));
+		(rset->srs_nrule == 0 && !rset->srs_rules));
 
 	if (rset->srs_nslot) {
 		kfree(rset->srs_rules);
@@ -241,7 +241,7 @@ static int sptlrpc_rule_set_expand(struct sptlrpc_rule_set *rset)
 
 	/* better use realloc() if available */
 	rules = kcalloc(nslot, sizeof(*rset->srs_rules), GFP_NOFS);
-	if (rules == NULL)
+	if (!rules)
 		return -ENOMEM;
 
 	if (rset->srs_nrule) {
@@ -450,7 +450,7 @@ static void target2fsname(const char *tgt, char *fsname, int buflen)
 	}
 
 	/* if we didn't find the pattern, treat the whole string as fsname */
-	if (ptr == NULL)
+	if (!ptr)
 		len = strlen(tgt);
 	else
 		len = ptr - tgt;
@@ -579,13 +579,13 @@ static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 	int rc;
 
 	target = lustre_cfg_string(lcfg, 1);
-	if (target == NULL) {
+	if (!target) {
 		CERROR("missing target name\n");
 		return -EINVAL;
 	}
 
 	param = lustre_cfg_string(lcfg, 2);
-	if (param == NULL) {
+	if (!param) {
 		CERROR("missing parameter\n");
 		return -EINVAL;
 	}
@@ -603,12 +603,12 @@ static int __sptlrpc_process_config(struct lustre_cfg *lcfg,
 	if (rc)
 		return -EINVAL;
 
-	if (conf == NULL) {
+	if (!conf) {
 		target2fsname(target, fsname, sizeof(fsname));
 
 		mutex_lock(&sptlrpc_conf_lock);
 		conf = sptlrpc_conf_get(fsname, 0);
-		if (conf == NULL) {
+		if (!conf) {
 			CERROR("can't find conf\n");
 			rc = -ENOMEM;
 		} else {
@@ -638,7 +638,7 @@ static int logname2fsname(const char *logname, char *buf, int buflen)
 	int len;
 
 	ptr = strrchr(logname, '-');
-	if (ptr == NULL || strcmp(ptr, "-sptlrpc")) {
+	if (!ptr || strcmp(ptr, "-sptlrpc")) {
 		CERROR("%s is not a sptlrpc config log\n", logname);
 		return -EINVAL;
 	}
@@ -772,7 +772,7 @@ void sptlrpc_conf_choose_flavor(enum lustre_sec_part from,
 	mutex_lock(&sptlrpc_conf_lock);
 
 	conf = sptlrpc_conf_get(name, 0);
-	if (conf == NULL)
+	if (!conf)
 		goto out;
 
 	/* convert uuid name (supposed end with _UUID) to target name */
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c b/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c
index bda9a77..e610a8d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_lproc.c
@@ -82,7 +82,7 @@ static int sptlrpc_info_lprocfs_seq_show(struct seq_file *seq, void *v)
 
 	if (cli->cl_import)
 		sec = sptlrpc_import_sec_ref(cli->cl_import);
-	if (sec == NULL)
+	if (!sec)
 		goto out;
 
 	sec_flags2str(sec->ps_flvr.sf_flags, str, sizeof(str));
@@ -121,7 +121,7 @@ static int sptlrpc_ctxs_lprocfs_seq_show(struct seq_file *seq, void *v)
 
 	if (cli->cl_import)
 		sec = sptlrpc_import_sec_ref(cli->cl_import);
-	if (sec == NULL)
+	if (!sec)
 		goto out;
 
 	if (sec->ps_policy->sp_cops->display)
@@ -178,7 +178,7 @@ int sptlrpc_lproc_init(void)
 {
 	int rc;
 
-	LASSERT(sptlrpc_debugfs_dir == NULL);
+	LASSERT(!sptlrpc_debugfs_dir);
 
 	sptlrpc_debugfs_dir = ldebugfs_register("sptlrpc", debugfs_lustre_root,
 						sptlrpc_lprocfs_vars, NULL);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_null.c b/drivers/staging/lustre/lustre/ptlrpc/sec_null.c
index ebfa609..446837d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_null.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_null.c
@@ -250,7 +250,7 @@ int null_enlarge_reqbuf(struct ptlrpc_sec *sec,
 		alloc_size = size_roundup_power2(newmsg_size);
 
 		newbuf = libcfs_kvzalloc(alloc_size, GFP_NOFS);
-		if (newbuf == NULL)
+		if (!newbuf)
 			return -ENOMEM;
 
 		/* Must lock this, so that otherwise unprotected change of
@@ -319,7 +319,7 @@ int null_alloc_rs(struct ptlrpc_request *req, int msgsize)
 		LASSERT(rs->rs_size >= rs_size);
 	} else {
 		rs = libcfs_kvzalloc(rs_size, GFP_NOFS);
-		if (rs == NULL)
+		if (!rs)
 			return -ENOMEM;
 
 		rs->rs_size = rs_size;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
index 905a414..cffddc0 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
@@ -104,7 +104,7 @@ static int plain_unpack_bsd(struct lustre_msg *msg, int swabbed)
 		return -EPROTO;
 
 	bsd = lustre_msg_buf(msg, PLAIN_PACK_BULK_OFF, PLAIN_BSD_SIZE);
-	if (bsd == NULL) {
+	if (!bsd) {
 		CERROR("bulk sec desc has short size %d\n",
 		       lustre_msg_buflen(msg, PLAIN_PACK_BULK_OFF));
 		return -EPROTO;
@@ -227,7 +227,7 @@ int plain_ctx_verify(struct ptlrpc_cli_ctx *ctx, struct ptlrpc_request *req)
 	swabbed = ptlrpc_rep_need_swab(req);
 
 	phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, sizeof(*phdr));
-	if (phdr == NULL) {
+	if (!phdr) {
 		CERROR("missing plain header\n");
 		return -EPROTO;
 	}
@@ -419,7 +419,7 @@ void plain_destroy_sec(struct ptlrpc_sec *sec)
 	LASSERT(sec->ps_import);
 	LASSERT(atomic_read(&sec->ps_refcount) == 0);
 	LASSERT(atomic_read(&sec->ps_nctx) == 0);
-	LASSERT(plsec->pls_ctx == NULL);
+	LASSERT(!plsec->pls_ctx);
 
 	class_import_put(sec->ps_import);
 
@@ -468,7 +468,7 @@ struct ptlrpc_sec *plain_create_sec(struct obd_import *imp,
 	/* install ctx immediately if this is a reverse sec */
 	if (svc_ctx) {
 		ctx = plain_sec_install_ctx(plsec);
-		if (ctx == NULL) {
+		if (!ctx) {
 			plain_destroy_sec(sec);
 			return NULL;
 		}
@@ -492,7 +492,7 @@ struct ptlrpc_cli_ctx *plain_lookup_ctx(struct ptlrpc_sec *sec,
 		atomic_inc(&ctx->cc_refcount);
 	read_unlock(&plsec->pls_lock);
 
-	if (unlikely(ctx == NULL))
+	if (unlikely(!ctx))
 		ctx = plain_sec_install_ctx(plsec);
 
 	return ctx;
@@ -665,7 +665,7 @@ int plain_enlarge_reqbuf(struct ptlrpc_sec *sec,
 		newbuf_size = size_roundup_power2(newbuf_size);
 
 		newbuf = libcfs_kvzalloc(newbuf_size, GFP_NOFS);
-		if (newbuf == NULL)
+		if (!newbuf)
 			return -ENOMEM;
 
 		/* Must lock this, so that otherwise unprotected change of
@@ -732,7 +732,7 @@ int plain_accept(struct ptlrpc_request *req)
 	swabbed = ptlrpc_req_need_swab(req);
 
 	phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, sizeof(*phdr));
-	if (phdr == NULL) {
+	if (!phdr) {
 		CERROR("missing plain header\n");
 		return -EPROTO;
 	}
@@ -801,7 +801,7 @@ int plain_alloc_rs(struct ptlrpc_request *req, int msgsize)
 		LASSERT(rs->rs_size >= rs_size);
 	} else {
 		rs = libcfs_kvzalloc(rs_size, GFP_NOFS);
-		if (rs == NULL)
+		if (!rs)
 			return -ENOMEM;
 
 		rs->rs_size = rs_size;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c b/drivers/staging/lustre/lustre/ptlrpc/service.c
index 8598300..38dbba5 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/service.c
@@ -77,7 +77,7 @@ ptlrpc_alloc_rqbd(struct ptlrpc_service_part *svcpt)
 	rqbd = kzalloc_node(sizeof(*rqbd), GFP_NOFS,
 			    cfs_cpt_spread_node(svc->srv_cptable,
 						svcpt->scp_cpt));
-	if (rqbd == NULL)
+	if (!rqbd)
 		return NULL;
 
 	rqbd->rqbd_svcpt = svcpt;
@@ -89,7 +89,7 @@ ptlrpc_alloc_rqbd(struct ptlrpc_service_part *svcpt)
 						svcpt->scp_cpt,
 						svc->srv_buf_size,
 						GFP_KERNEL);
-	if (rqbd->rqbd_buffer == NULL) {
+	if (!rqbd->rqbd_buffer) {
 		kfree(rqbd);
 		return NULL;
 	}
@@ -150,7 +150,7 @@ ptlrpc_grow_req_bufs(struct ptlrpc_service_part *svcpt, int post)
 
 		rqbd = ptlrpc_alloc_rqbd(svcpt);
 
-		if (rqbd == NULL) {
+		if (!rqbd) {
 			CERROR("%s: Can't allocate request buffer\n",
 			       svc->srv_name);
 			rc = -ENOMEM;
@@ -490,7 +490,7 @@ ptlrpc_service_part_init(struct ptlrpc_service *svc,
 	array->paa_reqs_array =
 		kzalloc_node(sizeof(struct list_head) * size, GFP_NOFS,
 			     cfs_cpt_spread_node(svc->srv_cptable, cpt));
-	if (array->paa_reqs_array == NULL)
+	if (!array->paa_reqs_array)
 		return -ENOMEM;
 
 	for (index = 0; index < size; index++)
@@ -499,7 +499,7 @@ ptlrpc_service_part_init(struct ptlrpc_service *svc,
 	array->paa_reqs_count =
 		kzalloc_node(sizeof(__u32) * size, GFP_NOFS,
 			     cfs_cpt_spread_node(svc->srv_cptable, cpt));
-	if (array->paa_reqs_count == NULL)
+	if (!array->paa_reqs_count)
 		goto free_reqs_array;
 
 	setup_timer(&svcpt->scp_at_timer, ptlrpc_at_timer,
@@ -556,14 +556,14 @@ ptlrpc_register_service(struct ptlrpc_service_conf *conf,
 	LASSERT(conf->psc_thr.tc_ctx_tags != 0);
 
 	cptable = cconf->cc_cptable;
-	if (cptable == NULL)
+	if (!cptable)
 		cptable = cfs_cpt_table;
 
 	if (!conf->psc_thr.tc_cpu_affinity) {
 		ncpts = 1;
 	} else {
 		ncpts = cfs_cpt_number(cptable);
-		if (cconf->cc_pattern != NULL) {
+		if (cconf->cc_pattern) {
 			struct cfs_expr_list *el;
 
 			rc = cfs_expr_list_parse(cconf->cc_pattern,
@@ -632,11 +632,11 @@ ptlrpc_register_service(struct ptlrpc_service_conf *conf,
 		if (!conf->psc_thr.tc_cpu_affinity)
 			cpt = CFS_CPT_ANY;
 		else
-			cpt = cpts != NULL ? cpts[i] : i;
+			cpt = cpts ? cpts[i] : i;
 
 		svcpt = kzalloc_node(sizeof(*svcpt), GFP_NOFS,
 				     cfs_cpt_spread_node(cptable, cpt));
-		if (svcpt == NULL) {
+		if (!svcpt) {
 			rc = -ENOMEM;
 			goto failed;
 		}
@@ -846,7 +846,7 @@ static void ptlrpc_server_finish_active_request(
 
 	ptlrpc_nrs_req_finalize(req);
 
-	if (req->rq_export != NULL)
+	if (req->rq_export)
 		class_export_rpc_dec(req->rq_export);
 
 	ptlrpc_server_finish_request(svcpt, req);
@@ -869,13 +869,13 @@ static int ptlrpc_check_req(struct ptlrpc_request *req)
 			  req->rq_export->exp_conn_cnt);
 		return -EEXIST;
 	}
-	if (unlikely(obd == NULL || obd->obd_fail)) {
+	if (unlikely(!obd || obd->obd_fail)) {
 		/*
 		 * Failing over, don't handle any more reqs, send
 		 * error response instead.
 		 */
 		CDEBUG(D_RPCTRACE, "Dropping req %p for failed obd %s\n",
-		       req, (obd != NULL) ? obd->obd_name : "unknown");
+		       req, obd ? obd->obd_name : "unknown");
 		rc = -ENODEV;
 	} else if (lustre_msg_get_flags(req->rq_reqmsg) &
 		   (MSG_REPLAY | MSG_REQ_REPLAY_DONE)) {
@@ -1044,7 +1044,7 @@ static int ptlrpc_at_send_early_reply(struct ptlrpc_request *req)
 	newdl = ktime_get_real_seconds() + at_get(&svcpt->scp_at_estimate);
 
 	reqcopy = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (reqcopy == NULL)
+	if (!reqcopy)
 		return -ENOMEM;
 	reqmsg = libcfs_kvzalloc(req->rq_reqlen, GFP_NOFS);
 	if (!reqmsg) {
@@ -1074,7 +1074,7 @@ static int ptlrpc_at_send_early_reply(struct ptlrpc_request *req)
 	/* Connection ref */
 	reqcopy->rq_export = class_conn2export(
 				     lustre_msg_get_handle(reqcopy->rq_reqmsg));
-	if (reqcopy->rq_export == NULL) {
+	if (!reqcopy->rq_export) {
 		rc = -ENODEV;
 		goto out;
 	}
@@ -1316,7 +1316,7 @@ static bool ptlrpc_server_allow_high(struct ptlrpc_service_part *svcpt,
 		     CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))) {
 		/* leave just 1 thread for normal RPCs */
 		running = PTLRPC_NTHRS_INIT;
-		if (svcpt->scp_service->srv_ops.so_hpreq_handler != NULL)
+		if (svcpt->scp_service->srv_ops.so_hpreq_handler)
 			running += 1;
 	}
 
@@ -1355,7 +1355,7 @@ static bool ptlrpc_server_allow_normal(struct ptlrpc_service_part *svcpt,
 		     CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))) {
 		/* leave just 1 thread for normal RPCs */
 		running = PTLRPC_NTHRS_INIT;
-		if (svcpt->scp_service->srv_ops.so_hpreq_handler != NULL)
+		if (svcpt->scp_service->srv_ops.so_hpreq_handler)
 			running += 1;
 	}
 
@@ -1405,7 +1405,7 @@ ptlrpc_server_request_get(struct ptlrpc_service_part *svcpt, bool force)
 
 	if (ptlrpc_server_high_pending(svcpt, force)) {
 		req = ptlrpc_nrs_req_get_nolock(svcpt, true, force);
-		if (req != NULL) {
+		if (req) {
 			svcpt->scp_hreq_count++;
 			goto got_request;
 		}
@@ -1413,7 +1413,7 @@ ptlrpc_server_request_get(struct ptlrpc_service_part *svcpt, bool force)
 
 	if (ptlrpc_server_normal_pending(svcpt, force)) {
 		req = ptlrpc_nrs_req_get_nolock(svcpt, false, force);
-		if (req != NULL) {
+		if (req) {
 			svcpt->scp_hreq_count = 0;
 			goto got_request;
 		}
@@ -1598,7 +1598,7 @@ ptlrpc_server_handle_request(struct ptlrpc_service_part *svcpt,
 	int fail_opc = 0;
 
 	request = ptlrpc_server_request_get(svcpt, false);
-	if (request == NULL)
+	if (!request)
 		return 0;
 
 	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT))
@@ -1620,7 +1620,7 @@ ptlrpc_server_handle_request(struct ptlrpc_service_part *svcpt,
 	timediff = timespec64_sub(work_start, request->rq_arrival_time);
 	timediff_usecs = timediff.tv_sec * USEC_PER_SEC +
 			 timediff.tv_nsec / NSEC_PER_USEC;
-	if (likely(svc->srv_stats != NULL)) {
+	if (likely(svc->srv_stats)) {
 		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQWAIT_CNTR,
 				    timediff_usecs);
 		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQQDEPTH_CNTR,
@@ -1718,7 +1718,7 @@ put_conn:
 	       request->rq_status,
 	       (request->rq_repmsg ?
 		lustre_msg_get_status(request->rq_repmsg) : -999));
-	if (likely(svc->srv_stats != NULL && request->rq_reqmsg != NULL)) {
+	if (likely(svc->srv_stats && request->rq_reqmsg)) {
 		__u32 op = lustre_msg_get_opc(request->rq_reqmsg);
 		int opc = opcode_offset(op);
 
@@ -2008,7 +2008,7 @@ static int ptlrpc_main(void *arg)
 	set_current_groups(ginfo);
 	put_group_info(ginfo);
 
-	if (svc->srv_ops.so_thr_init != NULL) {
+	if (svc->srv_ops.so_thr_init) {
 		rc = svc->srv_ops.so_thr_init(thread);
 		if (rc)
 			goto out;
@@ -2132,10 +2132,10 @@ out_srv_fini:
 	/*
 	 * deconstruct service specific state created by ptlrpc_start_thread()
 	 */
-	if (svc->srv_ops.so_thr_done != NULL)
+	if (svc->srv_ops.so_thr_done)
 		svc->srv_ops.so_thr_done(thread);
 
-	if (env != NULL) {
+	if (env) {
 		lu_context_fini(&env->le_ctx);
 		kfree(env);
 	}
@@ -2229,14 +2229,14 @@ static void ptlrpc_stop_hr_threads(void)
 	ptlrpc_hr.hr_stopping = 1;
 
 	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		if (hrp->hrp_thrs == NULL)
+		if (!hrp->hrp_thrs)
 			continue; /* uninitialized */
 		for (j = 0; j < hrp->hrp_nthrs; j++)
 			wake_up_all(&hrp->hrp_thrs[j].hrt_waitq);
 	}
 
 	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		if (hrp->hrp_thrs == NULL)
+		if (!hrp->hrp_thrs)
 			continue; /* uninitialized */
 		wait_event(ptlrpc_hr.hr_waitq,
 			       atomic_read(&hrp->hrp_nstopped) ==
@@ -2333,7 +2333,7 @@ static void ptlrpc_stop_all_threads(struct ptlrpc_service *svc)
 	int i;
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service != NULL)
+		if (svcpt->scp_service)
 			ptlrpc_svcpt_stop_threads(svcpt);
 	}
 }
@@ -2376,8 +2376,6 @@ int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
 	struct ptlrpc_service *svc;
 	int rc;
 
-	LASSERT(svcpt != NULL);
-
 	svc = svcpt->scp_service;
 
 	CDEBUG(D_RPCTRACE, "%s[%d] started %d min %d max %d\n",
@@ -2396,7 +2394,7 @@ int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
 	thread = kzalloc_node(sizeof(*thread), GFP_NOFS,
 			      cfs_cpt_spread_node(svc->srv_cptable,
 						  svcpt->scp_cpt));
-	if (thread == NULL)
+	if (!thread)
 		return -ENOMEM;
 	init_waitqueue_head(&thread->t_ctl_waitq);
 
@@ -2488,7 +2486,7 @@ int ptlrpc_hr_init(void)
 
 	ptlrpc_hr.hr_partitions = cfs_percpt_alloc(ptlrpc_hr.hr_cpt_table,
 						   sizeof(*hrp));
-	if (ptlrpc_hr.hr_partitions == NULL)
+	if (!ptlrpc_hr.hr_partitions)
 		return -ENOMEM;
 
 	init_waitqueue_head(&ptlrpc_hr.hr_waitq);
@@ -2509,7 +2507,7 @@ int ptlrpc_hr_init(void)
 			kzalloc_node(hrp->hrp_nthrs * sizeof(*hrt), GFP_NOFS,
 				cfs_cpt_spread_node(ptlrpc_hr.hr_cpt_table,
 						    i));
-		if (hrp->hrp_thrs == NULL) {
+		if (!hrp->hrp_thrs) {
 			rc = -ENOMEM;
 			goto out;
 		}
@@ -2537,7 +2535,7 @@ void ptlrpc_hr_fini(void)
 	struct ptlrpc_hr_partition *hrp;
 	int i;
 
-	if (ptlrpc_hr.hr_partitions == NULL)
+	if (!ptlrpc_hr.hr_partitions)
 		return;
 
 	ptlrpc_stop_hr_threads();
@@ -2577,7 +2575,7 @@ ptlrpc_service_del_atimer(struct ptlrpc_service *svc)
 
 	/* early disarm AT timer... */
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service != NULL)
+		if (svcpt->scp_service)
 			del_timer(&svcpt->scp_at_timer);
 	}
 }
@@ -2599,7 +2597,7 @@ ptlrpc_service_unlink_rqbd(struct ptlrpc_service *svc)
 	LASSERT(rc == 0);
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		/* Unlink all the request buffers.  This forces a 'final'
@@ -2612,7 +2610,7 @@ ptlrpc_service_unlink_rqbd(struct ptlrpc_service *svc)
 	}
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		/* Wait for the network to release any buffers
@@ -2648,7 +2646,7 @@ ptlrpc_service_purge_all(struct ptlrpc_service *svc)
 	int i;
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		spin_lock(&svcpt->scp_rep_lock);
@@ -2714,7 +2712,7 @@ ptlrpc_service_free(struct ptlrpc_service *svc)
 	int i;
 
 	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service == NULL)
+		if (!svcpt->scp_service)
 			break;
 
 		/* In case somebody rearmed this in the meantime */
@@ -2730,7 +2728,7 @@ ptlrpc_service_free(struct ptlrpc_service *svc)
 	ptlrpc_service_for_each_part(svcpt, i, svc)
 		kfree(svcpt);
 
-	if (svc->srv_cpts != NULL)
+	if (svc->srv_cpts)
 		cfs_expr_list_values_free(svc->srv_cpts, svc->srv_ncpts);
 
 	kfree(svc);
-- 
2.1.0

[PATCH 27/45] staging/lustre: Remove the "write to FSF to get a copy of GPL" wording

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Checkpatch highlighted that some of our Lustre files carry this
extra paragraph and indeed it does seem somewhat redundant, so remove it.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/include/linux/lnet/lnetctl.h           | 4 ----
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h           | 4 ----
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c        | 3 ---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c | 3 ---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c     | 3 ---
 drivers/staging/lustre/lnet/lnet/router.c                     | 4 ----
 drivers/staging/lustre/lnet/lnet/router_proc.c                | 4 ----
 drivers/staging/lustre/lustre/include/lu_ref.h                | 4 ----
 drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c             | 5 -----
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c            | 5 -----
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c             | 5 -----
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c        | 5 -----
 drivers/staging/lustre/lustre/ptlrpc/nrs.c                    | 4 ----
 drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c               | 4 ----
 14 files changed, 57 deletions(-)

diff --git a/drivers/staging/lustre/include/linux/lnet/lnetctl.h b/drivers/staging/lustre/include/linux/lnet/lnetctl.h
index bdd69b2..4b64f62 100644
--- a/drivers/staging/lustre/include/linux/lnet/lnetctl.h
+++ b/drivers/staging/lustre/include/linux/lnet/lnetctl.h
@@ -10,10 +10,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  * header for lnet ioctl
  */
 #ifndef _LNETCTL_H_
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index a4117ad..a176544 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -19,10 +19,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #ifndef _SOCKLND_SOCKLND_H_
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
index 02da02d..efb7169 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
@@ -19,9 +19,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "socklnd.h"
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c
index 77ce597..6329cbe 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c
@@ -14,9 +14,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "socklnd.h"
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
index 70910ed..976a072 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
@@ -19,9 +19,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "socklnd.h"
diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index 735a8f2..83ed123 100644
--- a/drivers/staging/lustre/lnet/lnet/router.c
+++ b/drivers/staging/lustre/lnet/lnet/router.c
@@ -15,10 +15,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #define DEBUG_SUBSYSTEM S_LNET
diff --git a/drivers/staging/lustre/lnet/lnet/router_proc.c b/drivers/staging/lustre/lnet/lnet/router_proc.c
index a7aaf0c..01dd900 100644
--- a/drivers/staging/lustre/lnet/lnet/router_proc.c
+++ b/drivers/staging/lustre/lnet/lnet/router_proc.c
@@ -15,10 +15,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #define DEBUG_SUBSYSTEM S_LNET
diff --git a/drivers/staging/lustre/lustre/include/lu_ref.h b/drivers/staging/lustre/lustre/include/lu_ref.h
index 97cd157..f7dfd83 100644
--- a/drivers/staging/lustre/lustre/include/lu_ref.h
+++ b/drivers/staging/lustre/lustre/include/lu_ref.h
@@ -17,10 +17,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #ifndef __LUSTRE_LU_REF_H
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
index 9137df9..33352af 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
index 2d08ba6..9c64bfd 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
index e0a8783..7396d66 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 41b9512..7fb277a 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs.c b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
index ed40be6..d603a57 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
@@ -13,10 +13,6 @@
  * GNU General Public License version 2 for more details.  A copy is
  * included in the COPYING file that accompanied this code.
 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
index 77894f8..0d8da35 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
@@ -13,10 +13,6 @@
  * GNU General Public License version 2 for more details.  A copy is
  * included in the COPYING file that accompanied this code.
 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  * GPL HEADER END
  */
 /*
-- 
2.1.0

[lustre-devel] [PATCH 27/45] staging/lustre: Remove the "write to FSF to get a copy of GPL" wording

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Checkpatch highlighted that some of our Lustre files carry this
extra paragraph and indeed it does seem somewhat redundant, so remove it.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/include/linux/lnet/lnetctl.h           | 4 ----
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h           | 4 ----
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c        | 3 ---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c | 3 ---
 drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c     | 3 ---
 drivers/staging/lustre/lnet/lnet/router.c                     | 4 ----
 drivers/staging/lustre/lnet/lnet/router_proc.c                | 4 ----
 drivers/staging/lustre/lustre/include/lu_ref.h                | 4 ----
 drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c             | 5 -----
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c            | 5 -----
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c             | 5 -----
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c        | 5 -----
 drivers/staging/lustre/lustre/ptlrpc/nrs.c                    | 4 ----
 drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c               | 4 ----
 14 files changed, 57 deletions(-)

diff --git a/drivers/staging/lustre/include/linux/lnet/lnetctl.h b/drivers/staging/lustre/include/linux/lnet/lnetctl.h
index bdd69b2..4b64f62 100644
--- a/drivers/staging/lustre/include/linux/lnet/lnetctl.h
+++ b/drivers/staging/lustre/include/linux/lnet/lnetctl.h
@@ -10,10 +10,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  * header for lnet ioctl
  */
 #ifndef _LNETCTL_H_
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
index a4117ad..a176544 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h
@@ -19,10 +19,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #ifndef _SOCKLND_SOCKLND_H_
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
index 02da02d..efb7169 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c
@@ -19,9 +19,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "socklnd.h"
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c
index 77ce597..6329cbe 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_modparams.c
@@ -14,9 +14,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "socklnd.h"
diff --git a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
index 70910ed..976a072 100644
--- a/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
+++ b/drivers/staging/lustre/lnet/klnds/socklnd/socklnd_proto.c
@@ -19,9 +19,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "socklnd.h"
diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index 735a8f2..83ed123 100644
--- a/drivers/staging/lustre/lnet/lnet/router.c
+++ b/drivers/staging/lustre/lnet/lnet/router.c
@@ -15,10 +15,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #define DEBUG_SUBSYSTEM S_LNET
diff --git a/drivers/staging/lustre/lnet/lnet/router_proc.c b/drivers/staging/lustre/lnet/lnet/router_proc.c
index a7aaf0c..01dd900 100644
--- a/drivers/staging/lustre/lnet/lnet/router_proc.c
+++ b/drivers/staging/lustre/lnet/lnet/router_proc.c
@@ -15,10 +15,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Portals; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #define DEBUG_SUBSYSTEM S_LNET
diff --git a/drivers/staging/lustre/lustre/include/lu_ref.h b/drivers/staging/lustre/lustre/include/lu_ref.h
index 97cd157..f7dfd83 100644
--- a/drivers/staging/lustre/lustre/include/lu_ref.h
+++ b/drivers/staging/lustre/lustre/include/lu_ref.h
@@ -17,10 +17,6 @@
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
  */
 
 #ifndef __LUSTRE_LU_REF_H
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
index 9137df9..33352af 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_cpu.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
index 2d08ba6..9c64bfd 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
index e0a8783..7396d66 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 41b9512..7fb277a 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -13,11 +13,6 @@
  * General Public License version 2 for more details (a copy is included
  * in the LICENSE file that accompanied this code).
  *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs.c b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
index ed40be6..d603a57 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs.c
@@ -13,10 +13,6 @@
  * GNU General Public License version 2 for more details.  A copy is
  * included in the COPYING file that accompanied this code.
 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  * GPL HEADER END
  */
 /*
diff --git a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
index 77894f8..0d8da35 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/nrs_fifo.c
@@ -13,10 +13,6 @@
  * GNU General Public License version 2 for more details.  A copy is
  * included in the COPYING file that accompanied this code.
 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  * GPL HEADER END
  */
 /*
-- 
2.1.0

[PATCH 28/45] staging/lustre/libcfs: Cleanup: parenthesis alignment adjustments

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Adjust alignment of argments that were pushed to next lines
to conform to kernel code style.
Found with checkpatch.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c        |  3 +--
 drivers/staging/lustre/lustre/libcfs/hash.c         | 18 +++++++++---------
 .../staging/lustre/lustre/libcfs/libcfs_string.c    | 19 +++++++------------
 .../lustre/lustre/libcfs/linux/linux-debug.c        |  2 +-
 .../lustre/lustre/libcfs/linux/linux-module.c       |  4 ++--
 drivers/staging/lustre/lustre/libcfs/module.c       |  8 ++++----
 drivers/staging/lustre/lustre/libcfs/tracefile.c    | 21 +++++++++------------
 drivers/staging/lustre/lustre/libcfs/workitem.c     |  6 +++---
 8 files changed, 36 insertions(+), 45 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 589b548..9cb8f04 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -448,8 +448,7 @@ void libcfs_debug_dumplog_internal(void *arg)
 		snprintf(debug_file_name, sizeof(debug_file_name) - 1,
 			 "%s.%lld.%ld", libcfs_debug_file_path_arr,
 			 (s64)ktime_get_real_seconds(), (long_ptr_t)arg);
-		pr_alert("LustreError: dumping log to %s\n",
-		       debug_file_name);
+		pr_alert("LustreError: dumping log to %s\n", debug_file_name);
 		cfs_tracefile_dump_all_pages(debug_file_name);
 		libcfs_run_debug_log_upcall(debug_file_name);
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index ad831fa..51d72f0 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -2040,15 +2040,15 @@ void cfs_hash_debug_str(struct cfs_hash *hs, struct seq_file *m)
 	theta = __cfs_hash_theta(hs);
 
 	seq_printf(m, "%-*s %5d %5d %5d %d.%03d %d.%03d %d.%03d  0x%02x %6d ",
-		      CFS_HASH_BIGNAME_LEN, hs->hs_name,
-		      1 << hs->hs_cur_bits, 1 << hs->hs_min_bits,
-		      1 << hs->hs_max_bits,
-		      __cfs_hash_theta_int(theta), __cfs_hash_theta_frac(theta),
-		      __cfs_hash_theta_int(hs->hs_min_theta),
-		      __cfs_hash_theta_frac(hs->hs_min_theta),
-		      __cfs_hash_theta_int(hs->hs_max_theta),
-		      __cfs_hash_theta_frac(hs->hs_max_theta),
-		      hs->hs_flags, hs->hs_rehash_count);
+		   CFS_HASH_BIGNAME_LEN, hs->hs_name,
+		   1 << hs->hs_cur_bits, 1 << hs->hs_min_bits,
+		   1 << hs->hs_max_bits,
+		   __cfs_hash_theta_int(theta), __cfs_hash_theta_frac(theta),
+		   __cfs_hash_theta_int(hs->hs_min_theta),
+		   __cfs_hash_theta_frac(hs->hs_min_theta),
+		   __cfs_hash_theta_int(hs->hs_max_theta),
+		   __cfs_hash_theta_frac(hs->hs_max_theta),
+		   hs->hs_flags, hs->hs_rehash_count);
 
 	/*
 	 * The distribution is a summary of the chained hash depth in
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index f3bcf20..f7cda59 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -343,11 +343,10 @@ cfs_range_expr_print(char *buffer, int count, struct cfs_range_expr *expr,
 		i = scnprintf(buffer, count, "%u", expr->re_lo);
 	else if (expr->re_stride == 1)
 		i = scnprintf(buffer, count, "%s%u-%u%s",
-				s, expr->re_lo, expr->re_hi, e);
+			      s, expr->re_lo, expr->re_hi, e);
 	else
 		i = scnprintf(buffer, count, "%s%u-%u/%u%s",
-				s, expr->re_lo, expr->re_hi,
-				expr->re_stride, e);
+			      s, expr->re_lo, expr->re_hi, expr->re_stride, e);
 	return i;
 }
 
@@ -469,7 +468,7 @@ cfs_expr_list_free(struct cfs_expr_list *expr_list)
 		struct cfs_range_expr *expr;
 
 		expr = list_entry(expr_list->el_exprs.next,
-				      struct cfs_range_expr, re_link);
+				  struct cfs_range_expr, re_link);
 		list_del(&expr->re_link);
 		LIBCFS_FREE(expr, sizeof(*expr));
 	}
@@ -520,15 +519,12 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
 			if (rc != 0)
 				break;
 
-			list_add_tail(&expr->re_link,
-					  &expr_list->el_exprs);
+			list_add_tail(&expr->re_link, &expr_list->el_exprs);
 		}
 	} else {
 		rc = cfs_range_expr_parse(&src, min, max, 0, &expr);
-		if (rc == 0) {
-			list_add_tail(&expr->re_link,
-					  &expr_list->el_exprs);
-		}
+		if (rc == 0)
+			list_add_tail(&expr->re_link, &expr_list->el_exprs);
 	}
 
 	if (rc != 0)
@@ -554,8 +550,7 @@ cfs_expr_list_free_list(struct list_head *list)
 	struct cfs_expr_list *el;
 
 	while (!list_empty(list)) {
-		el = list_entry(list->next,
-				    struct cfs_expr_list, el_link);
+		el = list_entry(list->next, struct cfs_expr_list, el_link);
 		list_del(&el->el_link);
 		cfs_expr_list_free(el);
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 85deec9..565f990 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -168,7 +168,7 @@ void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
 }
 
 static int panic_notifier(struct notifier_block *self, unsigned long unused1,
-			 void *unused2)
+			  void *unused2)
 {
 	if (libcfs_panic_in_progress)
 		return 0;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
index cbb44d7..ff90772 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
@@ -134,8 +134,8 @@ static long libcfs_ioctl(struct file *file,
 		return -EACCES;
 
 	if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
-	     _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR  ||
-	     _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
+	    _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR  ||
+	    _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
 		CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
 		       _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
 		return -EINVAL;
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index cf1498a..b8b69bb 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -192,9 +192,9 @@ struct cfs_psdev_ops libcfs_psdev_ops = {
 };
 
 static int proc_call_handler(void *data, int write, loff_t *ppos,
-		void __user *buffer, size_t *lenp,
-		int (*handler)(void *data, int write,
-		loff_t pos, void __user *buffer, int len))
+			     void __user *buffer, size_t *lenp,
+			     int (*handler)(void *data, int write, loff_t pos,
+					    void __user *buffer, int len))
 {
 	int rc = handler(data, write, *ppos, buffer, *lenp);
 
@@ -361,7 +361,7 @@ static int __proc_cpt_table(void *data, int write,
 }
 
 static int proc_cpt_table(struct ctl_table *table, int write,
-			   void __user *buffer, size_t *lenp, loff_t *ppos)
+			  void __user *buffer, size_t *lenp, loff_t *ppos)
 {
 	return proc_call_handler(table->data, write, ppos, buffer, lenp,
 				 __proc_cpt_table);
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index c8f6a07..28a11b5 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -503,8 +503,7 @@ panic_collect_pages(struct page_collection *pc)
 		tcd->tcd_cur_pages = 0;
 
 		if (pc->pc_want_daemon_pages) {
-			list_splice_init(&tcd->tcd_daemon_pages,
-					     &pc->pc_pages);
+			list_splice_init(&tcd->tcd_daemon_pages, &pc->pc_pages);
 			tcd->tcd_cur_daemon_pages = 0;
 		}
 	}
@@ -521,7 +520,7 @@ static void collect_pages_on_all_cpus(struct page_collection *pc)
 			tcd->tcd_cur_pages = 0;
 			if (pc->pc_want_daemon_pages) {
 				list_splice_init(&tcd->tcd_daemon_pages,
-						     &pc->pc_pages);
+						 &pc->pc_pages);
 				tcd->tcd_cur_daemon_pages = 0;
 			}
 		}
@@ -673,7 +672,7 @@ int cfs_tracefile_dump_all_pages(char *filename)
 		rc = PTR_ERR(filp);
 		filp = NULL;
 		pr_err("LustreError: can't open %s for dump: rc %d\n",
-			filename, rc);
+		       filename, rc);
 		goto out;
 	}
 
@@ -872,7 +871,7 @@ int cfs_trace_daemon_command_usrstr(void __user *usr_str, int usr_str_nob)
 		return rc;
 
 	rc = cfs_trace_copyin_string(str, usr_str_nob + 1,
-				 usr_str, usr_str_nob);
+				     usr_str, usr_str_nob);
 	if (rc == 0)
 		rc = cfs_trace_daemon_command(str);
 
@@ -980,8 +979,7 @@ static int tracefiled(void *arg)
 
 		MMSPACE_OPEN;
 
-		list_for_each_entry_safe(tage, tmp, &pc.pc_pages,
-						   linkage) {
+		list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
 			static loff_t f_pos;
 
 			__LASSERT_TAGE_INVARIANT(tage);
@@ -1012,8 +1010,7 @@ static int tracefiled(void *arg)
 			int i;
 
 			printk(KERN_ALERT "Lustre: trace pages aren't empty\n");
-			pr_err("total cpus(%d): ",
-				num_possible_cpus());
+			pr_err("total cpus(%d): ", num_possible_cpus());
 			for (i = 0; i < num_possible_cpus(); i++)
 				if (cpu_online(i))
 					pr_cont("%d(on) ", i);
@@ -1023,9 +1020,9 @@ static int tracefiled(void *arg)
 
 			i = 0;
 			list_for_each_entry_safe(tage, tmp, &pc.pc_pages,
-						     linkage)
+						 linkage)
 				pr_err("page %d belongs to cpu %d\n",
-					++i, tage->cpu);
+				       ++i, tage->cpu);
 			pr_err("There are %d pages unwritten\n", i);
 		}
 		__LASSERT(list_empty(&pc.pc_pages));
@@ -1130,7 +1127,7 @@ static void trace_cleanup_on_all_cpus(void)
 			tcd->tcd_shutting_down = 1;
 
 			list_for_each_entry_safe(tage, tmp, &tcd->tcd_pages,
-							   linkage) {
+						 linkage) {
 				__LASSERT_TAGE_INVARIANT(tage);
 
 				list_del(&tage->linkage);
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 97ae5c1..24400df 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -234,8 +234,8 @@ cfs_wi_scheduler (void *arg)
 
 		while (!list_empty(&sched->ws_runq) &&
 		       nloops < CFS_WI_RESCHED) {
-			wi = list_entry(sched->ws_runq.next,
-					    cfs_workitem_t, wi_list);
+			wi = list_entry(sched->ws_runq.next, cfs_workitem_t,
+					wi_list);
 			LASSERT(wi->wi_scheduled && !wi->wi_running);
 
 			list_del_init(&wi->wi_list);
@@ -455,7 +455,7 @@ cfs_wi_shutdown(void)
 	}
 	while (!list_empty(&cfs_wi_data.wi_scheds)) {
 		sched = list_entry(cfs_wi_data.wi_scheds.next,
-				       struct cfs_wi_sched, ws_list);
+				   struct cfs_wi_sched, ws_list);
 		list_del(&sched->ws_list);
 		LIBCFS_FREE(sched, sizeof(*sched));
 	}
-- 
2.1.0

[lustre-devel] [PATCH 28/45] staging/lustre/libcfs: Cleanup: parenthesis alignment adjustments

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Adjust alignment of argments that were pushed to next lines
to conform to kernel code style.
Found with checkpatch.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c        |  3 +--
 drivers/staging/lustre/lustre/libcfs/hash.c         | 18 +++++++++---------
 .../staging/lustre/lustre/libcfs/libcfs_string.c    | 19 +++++++------------
 .../lustre/lustre/libcfs/linux/linux-debug.c        |  2 +-
 .../lustre/lustre/libcfs/linux/linux-module.c       |  4 ++--
 drivers/staging/lustre/lustre/libcfs/module.c       |  8 ++++----
 drivers/staging/lustre/lustre/libcfs/tracefile.c    | 21 +++++++++------------
 drivers/staging/lustre/lustre/libcfs/workitem.c     |  6 +++---
 8 files changed, 36 insertions(+), 45 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 589b548..9cb8f04 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -448,8 +448,7 @@ void libcfs_debug_dumplog_internal(void *arg)
 		snprintf(debug_file_name, sizeof(debug_file_name) - 1,
 			 "%s.%lld.%ld", libcfs_debug_file_path_arr,
 			 (s64)ktime_get_real_seconds(), (long_ptr_t)arg);
-		pr_alert("LustreError: dumping log to %s\n",
-		       debug_file_name);
+		pr_alert("LustreError: dumping log to %s\n", debug_file_name);
 		cfs_tracefile_dump_all_pages(debug_file_name);
 		libcfs_run_debug_log_upcall(debug_file_name);
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index ad831fa..51d72f0 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -2040,15 +2040,15 @@ void cfs_hash_debug_str(struct cfs_hash *hs, struct seq_file *m)
 	theta = __cfs_hash_theta(hs);
 
 	seq_printf(m, "%-*s %5d %5d %5d %d.%03d %d.%03d %d.%03d  0x%02x %6d ",
-		      CFS_HASH_BIGNAME_LEN, hs->hs_name,
-		      1 << hs->hs_cur_bits, 1 << hs->hs_min_bits,
-		      1 << hs->hs_max_bits,
-		      __cfs_hash_theta_int(theta), __cfs_hash_theta_frac(theta),
-		      __cfs_hash_theta_int(hs->hs_min_theta),
-		      __cfs_hash_theta_frac(hs->hs_min_theta),
-		      __cfs_hash_theta_int(hs->hs_max_theta),
-		      __cfs_hash_theta_frac(hs->hs_max_theta),
-		      hs->hs_flags, hs->hs_rehash_count);
+		   CFS_HASH_BIGNAME_LEN, hs->hs_name,
+		   1 << hs->hs_cur_bits, 1 << hs->hs_min_bits,
+		   1 << hs->hs_max_bits,
+		   __cfs_hash_theta_int(theta), __cfs_hash_theta_frac(theta),
+		   __cfs_hash_theta_int(hs->hs_min_theta),
+		   __cfs_hash_theta_frac(hs->hs_min_theta),
+		   __cfs_hash_theta_int(hs->hs_max_theta),
+		   __cfs_hash_theta_frac(hs->hs_max_theta),
+		   hs->hs_flags, hs->hs_rehash_count);
 
 	/*
 	 * The distribution is a summary of the chained hash depth in
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index f3bcf20..f7cda59 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -343,11 +343,10 @@ cfs_range_expr_print(char *buffer, int count, struct cfs_range_expr *expr,
 		i = scnprintf(buffer, count, "%u", expr->re_lo);
 	else if (expr->re_stride == 1)
 		i = scnprintf(buffer, count, "%s%u-%u%s",
-				s, expr->re_lo, expr->re_hi, e);
+			      s, expr->re_lo, expr->re_hi, e);
 	else
 		i = scnprintf(buffer, count, "%s%u-%u/%u%s",
-				s, expr->re_lo, expr->re_hi,
-				expr->re_stride, e);
+			      s, expr->re_lo, expr->re_hi, expr->re_stride, e);
 	return i;
 }
 
@@ -469,7 +468,7 @@ cfs_expr_list_free(struct cfs_expr_list *expr_list)
 		struct cfs_range_expr *expr;
 
 		expr = list_entry(expr_list->el_exprs.next,
-				      struct cfs_range_expr, re_link);
+				  struct cfs_range_expr, re_link);
 		list_del(&expr->re_link);
 		LIBCFS_FREE(expr, sizeof(*expr));
 	}
@@ -520,15 +519,12 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
 			if (rc != 0)
 				break;
 
-			list_add_tail(&expr->re_link,
-					  &expr_list->el_exprs);
+			list_add_tail(&expr->re_link, &expr_list->el_exprs);
 		}
 	} else {
 		rc = cfs_range_expr_parse(&src, min, max, 0, &expr);
-		if (rc == 0) {
-			list_add_tail(&expr->re_link,
-					  &expr_list->el_exprs);
-		}
+		if (rc == 0)
+			list_add_tail(&expr->re_link, &expr_list->el_exprs);
 	}
 
 	if (rc != 0)
@@ -554,8 +550,7 @@ cfs_expr_list_free_list(struct list_head *list)
 	struct cfs_expr_list *el;
 
 	while (!list_empty(list)) {
-		el = list_entry(list->next,
-				    struct cfs_expr_list, el_link);
+		el = list_entry(list->next, struct cfs_expr_list, el_link);
 		list_del(&el->el_link);
 		cfs_expr_list_free(el);
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 85deec9..565f990 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -168,7 +168,7 @@ void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
 }
 
 static int panic_notifier(struct notifier_block *self, unsigned long unused1,
-			 void *unused2)
+			  void *unused2)
 {
 	if (libcfs_panic_in_progress)
 		return 0;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
index cbb44d7..ff90772 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
@@ -134,8 +134,8 @@ static long libcfs_ioctl(struct file *file,
 		return -EACCES;
 
 	if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
-	     _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR  ||
-	     _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
+	    _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR  ||
+	    _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
 		CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
 		       _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
 		return -EINVAL;
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index cf1498a..b8b69bb 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -192,9 +192,9 @@ struct cfs_psdev_ops libcfs_psdev_ops = {
 };
 
 static int proc_call_handler(void *data, int write, loff_t *ppos,
-		void __user *buffer, size_t *lenp,
-		int (*handler)(void *data, int write,
-		loff_t pos, void __user *buffer, int len))
+			     void __user *buffer, size_t *lenp,
+			     int (*handler)(void *data, int write, loff_t pos,
+					    void __user *buffer, int len))
 {
 	int rc = handler(data, write, *ppos, buffer, *lenp);
 
@@ -361,7 +361,7 @@ static int __proc_cpt_table(void *data, int write,
 }
 
 static int proc_cpt_table(struct ctl_table *table, int write,
-			   void __user *buffer, size_t *lenp, loff_t *ppos)
+			  void __user *buffer, size_t *lenp, loff_t *ppos)
 {
 	return proc_call_handler(table->data, write, ppos, buffer, lenp,
 				 __proc_cpt_table);
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index c8f6a07..28a11b5 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -503,8 +503,7 @@ panic_collect_pages(struct page_collection *pc)
 		tcd->tcd_cur_pages = 0;
 
 		if (pc->pc_want_daemon_pages) {
-			list_splice_init(&tcd->tcd_daemon_pages,
-					     &pc->pc_pages);
+			list_splice_init(&tcd->tcd_daemon_pages, &pc->pc_pages);
 			tcd->tcd_cur_daemon_pages = 0;
 		}
 	}
@@ -521,7 +520,7 @@ static void collect_pages_on_all_cpus(struct page_collection *pc)
 			tcd->tcd_cur_pages = 0;
 			if (pc->pc_want_daemon_pages) {
 				list_splice_init(&tcd->tcd_daemon_pages,
-						     &pc->pc_pages);
+						 &pc->pc_pages);
 				tcd->tcd_cur_daemon_pages = 0;
 			}
 		}
@@ -673,7 +672,7 @@ int cfs_tracefile_dump_all_pages(char *filename)
 		rc = PTR_ERR(filp);
 		filp = NULL;
 		pr_err("LustreError: can't open %s for dump: rc %d\n",
-			filename, rc);
+		       filename, rc);
 		goto out;
 	}
 
@@ -872,7 +871,7 @@ int cfs_trace_daemon_command_usrstr(void __user *usr_str, int usr_str_nob)
 		return rc;
 
 	rc = cfs_trace_copyin_string(str, usr_str_nob + 1,
-				 usr_str, usr_str_nob);
+				     usr_str, usr_str_nob);
 	if (rc == 0)
 		rc = cfs_trace_daemon_command(str);
 
@@ -980,8 +979,7 @@ static int tracefiled(void *arg)
 
 		MMSPACE_OPEN;
 
-		list_for_each_entry_safe(tage, tmp, &pc.pc_pages,
-						   linkage) {
+		list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
 			static loff_t f_pos;
 
 			__LASSERT_TAGE_INVARIANT(tage);
@@ -1012,8 +1010,7 @@ static int tracefiled(void *arg)
 			int i;
 
 			printk(KERN_ALERT "Lustre: trace pages aren't empty\n");
-			pr_err("total cpus(%d): ",
-				num_possible_cpus());
+			pr_err("total cpus(%d): ", num_possible_cpus());
 			for (i = 0; i < num_possible_cpus(); i++)
 				if (cpu_online(i))
 					pr_cont("%d(on) ", i);
@@ -1023,9 +1020,9 @@ static int tracefiled(void *arg)
 
 			i = 0;
 			list_for_each_entry_safe(tage, tmp, &pc.pc_pages,
-						     linkage)
+						 linkage)
 				pr_err("page %d belongs to cpu %d\n",
-					++i, tage->cpu);
+				       ++i, tage->cpu);
 			pr_err("There are %d pages unwritten\n", i);
 		}
 		__LASSERT(list_empty(&pc.pc_pages));
@@ -1130,7 +1127,7 @@ static void trace_cleanup_on_all_cpus(void)
 			tcd->tcd_shutting_down = 1;
 
 			list_for_each_entry_safe(tage, tmp, &tcd->tcd_pages,
-							   linkage) {
+						 linkage) {
 				__LASSERT_TAGE_INVARIANT(tage);
 
 				list_del(&tage->linkage);
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 97ae5c1..24400df 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -234,8 +234,8 @@ cfs_wi_scheduler (void *arg)
 
 		while (!list_empty(&sched->ws_runq) &&
 		       nloops < CFS_WI_RESCHED) {
-			wi = list_entry(sched->ws_runq.next,
-					    cfs_workitem_t, wi_list);
+			wi = list_entry(sched->ws_runq.next, cfs_workitem_t,
+					wi_list);
 			LASSERT(wi->wi_scheduled && !wi->wi_running);
 
 			list_del_init(&wi->wi_list);
@@ -455,7 +455,7 @@ cfs_wi_shutdown(void)
 	}
 	while (!list_empty(&cfs_wi_data.wi_scheds)) {
 		sched = list_entry(cfs_wi_data.wi_scheds.next,
-				       struct cfs_wi_sched, ws_list);
+				   struct cfs_wi_sched, ws_list);
 		list_del(&sched->ws_list);
 		LIBCFS_FREE(sched, sizeof(*sched));
 	}
-- 
2.1.0

[PATCH 29/45] staging/lustre/libcfs: Move EXPORT_SYMBOLs under function/variable

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Found with checkpatch

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c               | 4 ++--
 drivers/staging/lustre/lustre/libcfs/hash.c                | 1 -
 drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c | 7 +++----
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c   | 5 ++---
 4 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 9cb8f04..9bb31f9 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -47,15 +47,15 @@
 static char debug_file_name[1024];
 
 unsigned int libcfs_subsystem_debug = ~0;
+EXPORT_SYMBOL(libcfs_subsystem_debug);
 module_param(libcfs_subsystem_debug, int, 0644);
 MODULE_PARM_DESC(libcfs_subsystem_debug, "Lustre kernel debug subsystem mask");
-EXPORT_SYMBOL(libcfs_subsystem_debug);
 
 unsigned int libcfs_debug = (D_CANTMASK |
 			     D_NETERROR | D_HA | D_CONFIG | D_IOCTL);
+EXPORT_SYMBOL(libcfs_debug);
 module_param(libcfs_debug, int, 0644);
 MODULE_PARM_DESC(libcfs_debug, "Lustre kernel debug mask");
-EXPORT_SYMBOL(libcfs_debug);
 
 static int libcfs_param_debug_mb_set(const char *val,
 				     const struct kernel_param *kp)
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index 51d72f0..414577c 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -1702,7 +1702,6 @@ out:
 	cfs_hash_unlock(hs, 0);
 	cfs_hash_for_each_exit(hs);
 }
-
 EXPORT_SYMBOL(cfs_hash_hlist_for_each);
 
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c
index 68515d9..13d31e8 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c
@@ -65,6 +65,7 @@ void cfs_cap_raise(cfs_cap_t cap)
 		commit_creds(cred);
 	}
 }
+EXPORT_SYMBOL(cfs_cap_raise);
 
 void cfs_cap_lower(cfs_cap_t cap)
 {
@@ -76,11 +77,13 @@ void cfs_cap_lower(cfs_cap_t cap)
 		commit_creds(cred);
 	}
 }
+EXPORT_SYMBOL(cfs_cap_lower);
 
 int cfs_cap_raised(cfs_cap_t cap)
 {
 	return cap_raised(current_cap(), cap);
 }
+EXPORT_SYMBOL(cfs_cap_raised);
 
 static void cfs_kernel_cap_pack(kernel_cap_t kcap, cfs_cap_t *cap)
 {
@@ -95,10 +98,6 @@ cfs_cap_t cfs_curproc_cap_pack(void)
 	cfs_kernel_cap_pack(current_cap(), &cap);
 	return cap;
 }
-
-EXPORT_SYMBOL(cfs_cap_raise);
-EXPORT_SYMBOL(cfs_cap_lower);
-EXPORT_SYMBOL(cfs_cap_raised);
 EXPORT_SYMBOL(cfs_curproc_cap_pack);
 
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 565f990..04203b3 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -144,6 +144,7 @@ void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
 
 	libcfs_run_upcall (argv);
 }
+EXPORT_SYMBOL(libcfs_run_lbug_upcall);
 
 /* coverity[+kill] */
 void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
@@ -166,6 +167,7 @@ void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
 	while (1)
 		schedule();
 }
+EXPORT_SYMBOL(lbug_with_loc);
 
 static int panic_notifier(struct notifier_block *self, unsigned long unused1,
 			  void *unused2)
@@ -194,6 +196,3 @@ void libcfs_unregister_panic_notifier(void)
 {
 	atomic_notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
 }
-
-EXPORT_SYMBOL(libcfs_run_lbug_upcall);
-EXPORT_SYMBOL(lbug_with_loc);
-- 
2.1.0

[lustre-devel] [PATCH 29/45] staging/lustre/libcfs: Move EXPORT_SYMBOLs under function/variable

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Found with checkpatch

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c               | 4 ++--
 drivers/staging/lustre/lustre/libcfs/hash.c                | 1 -
 drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c | 7 +++----
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c   | 5 ++---
 4 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 9cb8f04..9bb31f9 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -47,15 +47,15 @@
 static char debug_file_name[1024];
 
 unsigned int libcfs_subsystem_debug = ~0;
+EXPORT_SYMBOL(libcfs_subsystem_debug);
 module_param(libcfs_subsystem_debug, int, 0644);
 MODULE_PARM_DESC(libcfs_subsystem_debug, "Lustre kernel debug subsystem mask");
-EXPORT_SYMBOL(libcfs_subsystem_debug);
 
 unsigned int libcfs_debug = (D_CANTMASK |
 			     D_NETERROR | D_HA | D_CONFIG | D_IOCTL);
+EXPORT_SYMBOL(libcfs_debug);
 module_param(libcfs_debug, int, 0644);
 MODULE_PARM_DESC(libcfs_debug, "Lustre kernel debug mask");
-EXPORT_SYMBOL(libcfs_debug);
 
 static int libcfs_param_debug_mb_set(const char *val,
 				     const struct kernel_param *kp)
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index 51d72f0..414577c 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -1702,7 +1702,6 @@ out:
 	cfs_hash_unlock(hs, 0);
 	cfs_hash_for_each_exit(hs);
 }
-
 EXPORT_SYMBOL(cfs_hash_hlist_for_each);
 
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c
index 68515d9..13d31e8 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c
@@ -65,6 +65,7 @@ void cfs_cap_raise(cfs_cap_t cap)
 		commit_creds(cred);
 	}
 }
+EXPORT_SYMBOL(cfs_cap_raise);
 
 void cfs_cap_lower(cfs_cap_t cap)
 {
@@ -76,11 +77,13 @@ void cfs_cap_lower(cfs_cap_t cap)
 		commit_creds(cred);
 	}
 }
+EXPORT_SYMBOL(cfs_cap_lower);
 
 int cfs_cap_raised(cfs_cap_t cap)
 {
 	return cap_raised(current_cap(), cap);
 }
+EXPORT_SYMBOL(cfs_cap_raised);
 
 static void cfs_kernel_cap_pack(kernel_cap_t kcap, cfs_cap_t *cap)
 {
@@ -95,10 +98,6 @@ cfs_cap_t cfs_curproc_cap_pack(void)
 	cfs_kernel_cap_pack(current_cap(), &cap);
 	return cap;
 }
-
-EXPORT_SYMBOL(cfs_cap_raise);
-EXPORT_SYMBOL(cfs_cap_lower);
-EXPORT_SYMBOL(cfs_cap_raised);
 EXPORT_SYMBOL(cfs_curproc_cap_pack);
 
 /*
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 565f990..04203b3 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -144,6 +144,7 @@ void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
 
 	libcfs_run_upcall (argv);
 }
+EXPORT_SYMBOL(libcfs_run_lbug_upcall);
 
 /* coverity[+kill] */
 void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
@@ -166,6 +167,7 @@ void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msgdata)
 	while (1)
 		schedule();
 }
+EXPORT_SYMBOL(lbug_with_loc);
 
 static int panic_notifier(struct notifier_block *self, unsigned long unused1,
 			  void *unused2)
@@ -194,6 +196,3 @@ void libcfs_unregister_panic_notifier(void)
 {
 	atomic_notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
 }
-
-EXPORT_SYMBOL(libcfs_run_lbug_upcall);
-EXPORT_SYMBOL(lbug_with_loc);
-- 
2.1.0

[PATCH 30/45] staging/lustre/libcfs: style change to add missing spaces for operations

[green]

From: Oleg Drokin <green@linuxhacker.ru>

This fixes checkpatch messages about
"spaces preferred around that '-' (ctx:VxV)"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c                 | 2 +-
 drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c       | 2 +-
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.c             | 7 ++++---
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 9bb31f9..fa81582 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -418,7 +418,7 @@ libcfs_debug_str2mask(int *mask, const char *str, int is_subsys)
 	/* Allow a number for backwards compatibility */
 
 	for (n = strlen(str); n > 0; n--)
-		if (!isspace(str[n-1]))
+		if (!isspace(str[n - 1]))
 			break;
 	matched = n;
 	t = sscanf(str, "%i%n", &m, &matched);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
index 025e2f0..86f32ff 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
@@ -50,7 +50,7 @@ void *libcfs_kvzalloc_cpt(struct cfs_cpt_table *cptab, int cpt, size_t size,
 	ret = kzalloc_node(size, flags | __GFP_NOWARN,
 			   cfs_cpt_spread_node(cptab, cpt));
 	if (!ret) {
-		WARN_ON(!(flags & (__GFP_FS|__GFP_HIGH)));
+		WARN_ON(!(flags & (__GFP_FS | __GFP_HIGH)));
 		ret = vmalloc_node(size, cfs_cpt_spread_node(cptab, cpt));
 	}
 
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 89944c0..5e3c400 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -268,5 +268,5 @@ int cfs_trace_max_debug_mb(void)
 {
 	int  total_mb = (totalram_pages >> (20 - PAGE_SHIFT));
 
-	return max(512, (total_mb * 80)/100);
+	return max(512, (total_mb * 80) / 100);
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 28a11b5..967f8d7 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -346,7 +346,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 			break;
 	}
 
-	if (*(string_buf+needed-1) != '\n')
+	if (*(string_buf + needed - 1) != '\n')
 		printk(KERN_INFO "format at %s:%d:%s doesn't end in newline\n",
 		       file, msgdata->msg_line, msgdata->msg_fn);
 
@@ -436,7 +436,7 @@ console:
 			remain = CFS_TRACE_CONSOLE_BUFFER_SIZE - needed;
 			if (remain > 0) {
 				va_start(ap, format2);
-				needed += vsnprintf(string_buf+needed, remain,
+				needed += vsnprintf(string_buf + needed, remain,
 						    format2, ap);
 				va_end(ap);
 			}
@@ -667,7 +667,8 @@ int cfs_tracefile_dump_all_pages(char *filename)
 
 	cfs_tracefile_write_lock();
 
-	filp = filp_open(filename, O_CREAT|O_EXCL|O_WRONLY|O_LARGEFILE, 0600);
+	filp = filp_open(filename, O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE,
+			 0600);
 	if (IS_ERR(filp)) {
 		rc = PTR_ERR(filp);
 		filp = NULL;
-- 
2.1.0

[lustre-devel] [PATCH 30/45] staging/lustre/libcfs: style change to add missing spaces for operations

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

This fixes checkpatch messages about
"spaces preferred around that '-' (ctx:VxV)"

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c                 | 2 +-
 drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c       | 2 +-
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.c             | 7 ++++---
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index 9bb31f9..fa81582 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -418,7 +418,7 @@ libcfs_debug_str2mask(int *mask, const char *str, int is_subsys)
 	/* Allow a number for backwards compatibility */
 
 	for (n = strlen(str); n > 0; n--)
-		if (!isspace(str[n-1]))
+		if (!isspace(str[n - 1]))
 			break;
 	matched = n;
 	t = sscanf(str, "%i%n", &m, &matched);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
index 025e2f0..86f32ff 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-mem.c
@@ -50,7 +50,7 @@ void *libcfs_kvzalloc_cpt(struct cfs_cpt_table *cptab, int cpt, size_t size,
 	ret = kzalloc_node(size, flags | __GFP_NOWARN,
 			   cfs_cpt_spread_node(cptab, cpt));
 	if (!ret) {
-		WARN_ON(!(flags & (__GFP_FS|__GFP_HIGH)));
+		WARN_ON(!(flags & (__GFP_FS | __GFP_HIGH)));
 		ret = vmalloc_node(size, cfs_cpt_spread_node(cptab, cpt));
 	}
 
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 89944c0..5e3c400 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -268,5 +268,5 @@ int cfs_trace_max_debug_mb(void)
 {
 	int  total_mb = (totalram_pages >> (20 - PAGE_SHIFT));
 
-	return max(512, (total_mb * 80)/100);
+	return max(512, (total_mb * 80) / 100);
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 28a11b5..967f8d7 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -346,7 +346,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 			break;
 	}
 
-	if (*(string_buf+needed-1) != '\n')
+	if (*(string_buf + needed - 1) != '\n')
 		printk(KERN_INFO "format at %s:%d:%s doesn't end in newline\n",
 		       file, msgdata->msg_line, msgdata->msg_fn);
 
@@ -436,7 +436,7 @@ console:
 			remain = CFS_TRACE_CONSOLE_BUFFER_SIZE - needed;
 			if (remain > 0) {
 				va_start(ap, format2);
-				needed += vsnprintf(string_buf+needed, remain,
+				needed += vsnprintf(string_buf + needed, remain,
 						    format2, ap);
 				va_end(ap);
 			}
@@ -667,7 +667,8 @@ int cfs_tracefile_dump_all_pages(char *filename)
 
 	cfs_tracefile_write_lock();
 
-	filp = filp_open(filename, O_CREAT|O_EXCL|O_WRONLY|O_LARGEFILE, 0600);
+	filp = filp_open(filename, O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE,
+			 0600);
 	if (IS_ERR(filp)) {
 		rc = PTR_ERR(filp);
 		filp = NULL;
-- 
2.1.0

[PATCH 31/45] staging/lustre/libcfs: reformat cfs_tcd_for_each_type_lock define

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Avoid using leading spaces that make checkpatch unhappy.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/tracefile.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 67a701f..92a00ed 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -191,9 +191,9 @@ extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];
 		     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
 
 #define cfs_tcd_for_each_type_lock(tcd, i, cpu)			   \
-    for (i = 0; cfs_trace_data[i] &&				      \
-	 (tcd = &(*cfs_trace_data[i])[cpu].tcd) &&			\
-	 cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
+	for (i = 0; cfs_trace_data[i] &&				\
+	     (tcd = &(*cfs_trace_data[i])[cpu].tcd) &&			\
+	     cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
 
 /* XXX nikita: this declaration is internal to tracefile.c and should probably
  * be moved there */
-- 
2.1.0

[lustre-devel] [PATCH 31/45] staging/lustre/libcfs: reformat cfs_tcd_for_each_type_lock define

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Avoid using leading spaces that make checkpatch unhappy.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/tracefile.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 67a701f..92a00ed 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -191,9 +191,9 @@ extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];
 		     j++, (tcd) = &(*cfs_trace_data[i])[j].tcd)
 
 #define cfs_tcd_for_each_type_lock(tcd, i, cpu)			   \
-    for (i = 0; cfs_trace_data[i] &&				      \
-	 (tcd = &(*cfs_trace_data[i])[cpu].tcd) &&			\
-	 cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
+	for (i = 0; cfs_trace_data[i] &&				\
+	     (tcd = &(*cfs_trace_data[i])[cpu].tcd) &&			\
+	     cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
 
 /* XXX nikita: this declaration is internal to tracefile.c and should probably
  * be moved there */
-- 
2.1.0

[PATCH 32/45] staging/lustre/libcfs: Remove stray spaces after function name

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Problem highlighted by checkpatch.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.c         | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.h         | 3 +--
 drivers/staging/lustre/lustre/libcfs/workitem.c          | 9 ++++-----
 4 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 04203b3..3f3c2d9 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -142,7 +142,7 @@ void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
 	argv[4] = buf;
 	argv[5] = NULL;
 
-	libcfs_run_upcall (argv);
+	libcfs_run_upcall(argv);
 }
 EXPORT_SYMBOL(libcfs_run_lbug_upcall);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 967f8d7..d9bb2b5 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -378,7 +378,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	__LASSERT(debug_buf == string_buf);
 
 	tage->used += needed;
-	__LASSERT (tage->used <= PAGE_CACHE_SIZE);
+	__LASSERT(tage->used <= PAGE_CACHE_SIZE);
 
 console:
 	if ((mask & libcfs_printk) == 0) {
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 92a00ed..2285744 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -279,8 +279,7 @@ cfs_trace_get_tcd(void)
 	return tcd;
 }
 
-static inline void
-cfs_trace_put_tcd (struct cfs_trace_cpu_data *tcd)
+static inline void cfs_trace_put_tcd(struct cfs_trace_cpu_data *tcd)
 {
 	cfs_trace_unlock_tcd(tcd, 0);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 24400df..9d80cfb 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -163,7 +163,7 @@ cfs_wi_deschedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 		wi->wi_scheduled = 0;
 	}
 
-	LASSERT (list_empty(&wi->wi_list));
+	LASSERT(list_empty(&wi->wi_list));
 
 	spin_unlock(&sched->ws_lock);
 	return rc;
@@ -186,7 +186,7 @@ cfs_wi_schedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 	spin_lock(&sched->ws_lock);
 
 	if (!wi->wi_scheduled) {
-		LASSERT (list_empty(&wi->wi_list));
+		LASSERT(list_empty(&wi->wi_list));
 
 		wi->wi_scheduled = 1;
 		sched->ws_nscheduled++;
@@ -198,14 +198,13 @@ cfs_wi_schedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 		}
 	}
 
-	LASSERT (!list_empty(&wi->wi_list));
+	LASSERT(!list_empty(&wi->wi_list));
 	spin_unlock(&sched->ws_lock);
 	return;
 }
 EXPORT_SYMBOL(cfs_wi_schedule);
 
-static int
-cfs_wi_scheduler (void *arg)
+static int cfs_wi_scheduler(void *arg)
 {
 	struct cfs_wi_sched	*sched = (struct cfs_wi_sched *)arg;
 
-- 
2.1.0

[lustre-devel] [PATCH 32/45] staging/lustre/libcfs: Remove stray spaces after function name

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Problem highlighted by checkpatch.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.c         | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.h         | 3 +--
 drivers/staging/lustre/lustre/libcfs/workitem.c          | 9 ++++-----
 4 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 04203b3..3f3c2d9 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -142,7 +142,7 @@ void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *msgdata)
 	argv[4] = buf;
 	argv[5] = NULL;
 
-	libcfs_run_upcall (argv);
+	libcfs_run_upcall(argv);
 }
 EXPORT_SYMBOL(libcfs_run_lbug_upcall);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 967f8d7..d9bb2b5 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -378,7 +378,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	__LASSERT(debug_buf == string_buf);
 
 	tage->used += needed;
-	__LASSERT (tage->used <= PAGE_CACHE_SIZE);
+	__LASSERT(tage->used <= PAGE_CACHE_SIZE);
 
 console:
 	if ((mask & libcfs_printk) == 0) {
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 92a00ed..2285744 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -279,8 +279,7 @@ cfs_trace_get_tcd(void)
 	return tcd;
 }
 
-static inline void
-cfs_trace_put_tcd (struct cfs_trace_cpu_data *tcd)
+static inline void cfs_trace_put_tcd(struct cfs_trace_cpu_data *tcd)
 {
 	cfs_trace_unlock_tcd(tcd, 0);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 24400df..9d80cfb 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -163,7 +163,7 @@ cfs_wi_deschedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 		wi->wi_scheduled = 0;
 	}
 
-	LASSERT (list_empty(&wi->wi_list));
+	LASSERT(list_empty(&wi->wi_list));
 
 	spin_unlock(&sched->ws_lock);
 	return rc;
@@ -186,7 +186,7 @@ cfs_wi_schedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 	spin_lock(&sched->ws_lock);
 
 	if (!wi->wi_scheduled) {
-		LASSERT (list_empty(&wi->wi_list));
+		LASSERT(list_empty(&wi->wi_list));
 
 		wi->wi_scheduled = 1;
 		sched->ws_nscheduled++;
@@ -198,14 +198,13 @@ cfs_wi_schedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 		}
 	}
 
-	LASSERT (!list_empty(&wi->wi_list));
+	LASSERT(!list_empty(&wi->wi_list));
 	spin_unlock(&sched->ws_lock);
 	return;
 }
 EXPORT_SYMBOL(cfs_wi_schedule);
 
-static int
-cfs_wi_scheduler (void *arg)
+static int cfs_wi_scheduler(void *arg)
 {
 	struct cfs_wi_sched	*sched = (struct cfs_wi_sched *)arg;
 
-- 
2.1.0

[PATCH 33/45] staging/lustre/libcfs: Shortened too long lines

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Lines that were too long for not good reason were shortened in this patch.
Found with checkpatch.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c | 6 ++++--
 drivers/staging/lustre/lustre/libcfs/tracefile.c         | 6 +++---
 drivers/staging/lustre/lustre/libcfs/workitem.c          | 3 ++-
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 3f3c2d9..638e4b3 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -189,10 +189,12 @@ static struct notifier_block libcfs_panic_notifier = {
 
 void libcfs_register_panic_notifier(void)
 {
-	atomic_notifier_chain_register(&panic_notifier_list, &libcfs_panic_notifier);
+	atomic_notifier_chain_register(&panic_notifier_list,
+				       &libcfs_panic_notifier);
 }
 
 void libcfs_unregister_panic_notifier(void)
 {
-	atomic_notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
+	atomic_notifier_chain_unregister(&panic_notifier_list,
+					 &libcfs_panic_notifier);
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index d9bb2b5..9191f38 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -399,9 +399,9 @@ console:
 			return 1;
 		}
 
-		if (cfs_time_after(cfs_time_current(), cdls->cdls_next +
-						       libcfs_console_max_delay
-						       + cfs_time_seconds(10))) {
+		if (cfs_time_after(cfs_time_current(),
+				   cdls->cdls_next + libcfs_console_max_delay +
+				   cfs_time_seconds(10))) {
 			/* last timeout was a long time ago */
 			cdls->cdls_delay /= libcfs_console_backoff * 4;
 		} else {
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 9d80cfb..e234dfe 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -46,7 +46,8 @@
 #define CFS_WS_NAME_LEN	 16
 
 struct cfs_wi_sched {
-	struct list_head		ws_list;	/* chain on global list */
+	/* chain on global list */
+	struct list_head		ws_list;
 	/** serialised workitems */
 	spinlock_t		ws_lock;
 	/** where schedulers sleep */
-- 
2.1.0

[lustre-devel] [PATCH 33/45] staging/lustre/libcfs: Shortened too long lines

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Lines that were too long for not good reason were shortened in this patch.
Found with checkpatch.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c | 6 ++++--
 drivers/staging/lustre/lustre/libcfs/tracefile.c         | 6 +++---
 drivers/staging/lustre/lustre/libcfs/workitem.c          | 3 ++-
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
index 3f3c2d9..638e4b3 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-debug.c
@@ -189,10 +189,12 @@ static struct notifier_block libcfs_panic_notifier = {
 
 void libcfs_register_panic_notifier(void)
 {
-	atomic_notifier_chain_register(&panic_notifier_list, &libcfs_panic_notifier);
+	atomic_notifier_chain_register(&panic_notifier_list,
+				       &libcfs_panic_notifier);
 }
 
 void libcfs_unregister_panic_notifier(void)
 {
-	atomic_notifier_chain_unregister(&panic_notifier_list, &libcfs_panic_notifier);
+	atomic_notifier_chain_unregister(&panic_notifier_list,
+					 &libcfs_panic_notifier);
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index d9bb2b5..9191f38 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -399,9 +399,9 @@ console:
 			return 1;
 		}
 
-		if (cfs_time_after(cfs_time_current(), cdls->cdls_next +
-						       libcfs_console_max_delay
-						       + cfs_time_seconds(10))) {
+		if (cfs_time_after(cfs_time_current(),
+				   cdls->cdls_next + libcfs_console_max_delay +
+				   cfs_time_seconds(10))) {
 			/* last timeout was a long time ago */
 			cdls->cdls_delay /= libcfs_console_backoff * 4;
 		} else {
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 9d80cfb..e234dfe 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -46,7 +46,8 @@
 #define CFS_WS_NAME_LEN	 16
 
 struct cfs_wi_sched {
-	struct list_head		ws_list;	/* chain on global list */
+	/* chain on global list */
+	struct list_head		ws_list;
 	/** serialised workitems */
 	spinlock_t		ws_lock;
 	/** where schedulers sleep */
-- 
2.1.0

[PATCH 34/45] staging/lustre/libcfs: Remove unused cfs_tcd_owns_tage() function

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Does not appear to be used anywhere.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 10 ----------
 drivers/staging/lustre/lustre/libcfs/tracefile.h             |  3 ---
 2 files changed, 13 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 5e3c400..6cff79d 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -176,16 +176,6 @@ void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
 		spin_unlock(&tcd->tcd_lock);
 }
 
-int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
-		      struct cfs_trace_page *tage)
-{
-	/*
-	 * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
-	 * from here: this will lead to infinite recursion.
-	 */
-	return tcd->tcd_cpu == tage->cpu;
-}
-
 void
 cfs_set_ptldebug_header(struct ptldebug_header *header,
 			struct libcfs_debug_msg_data *msgdata,
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 2285744..0995da1 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -289,9 +289,6 @@ static inline void cfs_trace_put_tcd(struct cfs_trace_cpu_data *tcd)
 int cfs_trace_refill_stock(struct cfs_trace_cpu_data *tcd, gfp_t gfp,
 			   struct list_head *stock);
 
-int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
-		      struct cfs_trace_page *tage);
-
 void cfs_trace_assertion_failed(const char *str,
 				struct libcfs_debug_msg_data *m);
 
-- 
2.1.0

[lustre-devel] [PATCH 34/45] staging/lustre/libcfs: Remove unused cfs_tcd_owns_tage() function

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Does not appear to be used anywhere.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 10 ----------
 drivers/staging/lustre/lustre/libcfs/tracefile.h             |  3 ---
 2 files changed, 13 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 5e3c400..6cff79d 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -176,16 +176,6 @@ void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking)
 		spin_unlock(&tcd->tcd_lock);
 }
 
-int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
-		      struct cfs_trace_page *tage)
-{
-	/*
-	 * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
-	 * from here: this will lead to infinite recursion.
-	 */
-	return tcd->tcd_cpu == tage->cpu;
-}
-
 void
 cfs_set_ptldebug_header(struct ptldebug_header *header,
 			struct libcfs_debug_msg_data *msgdata,
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 2285744..0995da1 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -289,9 +289,6 @@ static inline void cfs_trace_put_tcd(struct cfs_trace_cpu_data *tcd)
 int cfs_trace_refill_stock(struct cfs_trace_cpu_data *tcd, gfp_t gfp,
 			   struct list_head *stock);
 
-int cfs_tcd_owns_tage(struct cfs_trace_cpu_data *tcd,
-		      struct cfs_trace_page *tage);
-
 void cfs_trace_assertion_failed(const char *str,
 				struct libcfs_debug_msg_data *m);
 
-- 
2.1.0

[PATCH 35/45] staging/lustre/libcfs: Move private tracefile structs out of header

[green]

From: Oleg Drokin <green@linuxhacker.ru>

the struct page_collection, struct cfs_trace_page and
struct tracefiled_ctl are only used by tracefile.c, so move them
there.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/tracefile.c | 45 +++++++++++++++++++++
 drivers/staging/lustre/lustre/libcfs/tracefile.h | 51 ------------------------
 2 files changed, 45 insertions(+), 51 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 9191f38..298135f 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -56,6 +56,51 @@ static int thread_running;
 
 static atomic_t cfs_tage_allocated = ATOMIC_INIT(0);
 
+struct page_collection {
+	struct list_head	pc_pages;
+	/*
+	 * if this flag is set, collect_pages() will spill both
+	 * ->tcd_daemon_pages and ->tcd_pages to the ->pc_pages. Otherwise,
+	 * only ->tcd_pages are spilled.
+	 */
+	int		pc_want_daemon_pages;
+};
+
+struct tracefiled_ctl {
+	struct completion	tctl_start;
+	struct completion	tctl_stop;
+	wait_queue_head_t		tctl_waitq;
+	pid_t			tctl_pid;
+	atomic_t		tctl_shutdown;
+};
+
+/*
+ * small data-structure for each page owned by tracefiled.
+ */
+struct cfs_trace_page {
+	/*
+	 * page itself
+	 */
+	struct page	  *page;
+	/*
+	 * linkage into one of the lists in trace_data_union or
+	 * page_collection
+	 */
+	struct list_head	   linkage;
+	/*
+	 * number of bytes used within this page
+	 */
+	unsigned int	 used;
+	/*
+	 * cpu that owns this page
+	 */
+	unsigned short       cpu;
+	/*
+	 * type(context) of this page
+	 */
+	unsigned short       type;
+};
+
 static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
 					 struct cfs_trace_cpu_data *tcd);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 0995da1..2d4dc73 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -195,57 +195,6 @@ extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];
 	     (tcd = &(*cfs_trace_data[i])[cpu].tcd) &&			\
 	     cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
 
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct page_collection {
-	struct list_head	pc_pages;
-	/*
-	 * if this flag is set, collect_pages() will spill both
-	 * ->tcd_daemon_pages and ->tcd_pages to the ->pc_pages. Otherwise,
-	 * only ->tcd_pages are spilled.
-	 */
-	int		pc_want_daemon_pages;
-};
-
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct tracefiled_ctl {
-	struct completion	tctl_start;
-	struct completion	tctl_stop;
-	wait_queue_head_t		tctl_waitq;
-	pid_t			tctl_pid;
-	atomic_t		tctl_shutdown;
-};
-
-/*
- * small data-structure for each page owned by tracefiled.
- */
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct cfs_trace_page {
-	/*
-	 * page itself
-	 */
-	struct page	  *page;
-	/*
-	 * linkage into one of the lists in trace_data_union or
-	 * page_collection
-	 */
-	struct list_head	   linkage;
-	/*
-	 * number of bytes used within this page
-	 */
-	unsigned int	 used;
-	/*
-	 * cpu that owns this page
-	 */
-	unsigned short       cpu;
-	/*
-	 * type(context) of this page
-	 */
-	unsigned short       type;
-};
-
 void cfs_set_ptldebug_header(struct ptldebug_header *header,
 			     struct libcfs_debug_msg_data *m,
 			     unsigned long stack);
-- 
2.1.0

[lustre-devel] [PATCH 35/45] staging/lustre/libcfs: Move private tracefile structs out of header

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

the struct page_collection, struct cfs_trace_page and
struct tracefiled_ctl are only used by tracefile.c, so move them
there.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/tracefile.c | 45 +++++++++++++++++++++
 drivers/staging/lustre/lustre/libcfs/tracefile.h | 51 ------------------------
 2 files changed, 45 insertions(+), 51 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 9191f38..298135f 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -56,6 +56,51 @@ static int thread_running;
 
 static atomic_t cfs_tage_allocated = ATOMIC_INIT(0);
 
+struct page_collection {
+	struct list_head	pc_pages;
+	/*
+	 * if this flag is set, collect_pages() will spill both
+	 * ->tcd_daemon_pages and ->tcd_pages to the ->pc_pages. Otherwise,
+	 * only ->tcd_pages are spilled.
+	 */
+	int		pc_want_daemon_pages;
+};
+
+struct tracefiled_ctl {
+	struct completion	tctl_start;
+	struct completion	tctl_stop;
+	wait_queue_head_t		tctl_waitq;
+	pid_t			tctl_pid;
+	atomic_t		tctl_shutdown;
+};
+
+/*
+ * small data-structure for each page owned by tracefiled.
+ */
+struct cfs_trace_page {
+	/*
+	 * page itself
+	 */
+	struct page	  *page;
+	/*
+	 * linkage into one of the lists in trace_data_union or
+	 * page_collection
+	 */
+	struct list_head	   linkage;
+	/*
+	 * number of bytes used within this page
+	 */
+	unsigned int	 used;
+	/*
+	 * cpu that owns this page
+	 */
+	unsigned short       cpu;
+	/*
+	 * type(context) of this page
+	 */
+	unsigned short       type;
+};
+
 static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
 					 struct cfs_trace_cpu_data *tcd);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 0995da1..2d4dc73 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -195,57 +195,6 @@ extern union cfs_trace_data_union (*cfs_trace_data[TCD_MAX_TYPES])[NR_CPUS];
 	     (tcd = &(*cfs_trace_data[i])[cpu].tcd) &&			\
 	     cfs_trace_lock_tcd(tcd, 1); cfs_trace_unlock_tcd(tcd, 1), i++)
 
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct page_collection {
-	struct list_head	pc_pages;
-	/*
-	 * if this flag is set, collect_pages() will spill both
-	 * ->tcd_daemon_pages and ->tcd_pages to the ->pc_pages. Otherwise,
-	 * only ->tcd_pages are spilled.
-	 */
-	int		pc_want_daemon_pages;
-};
-
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct tracefiled_ctl {
-	struct completion	tctl_start;
-	struct completion	tctl_stop;
-	wait_queue_head_t		tctl_waitq;
-	pid_t			tctl_pid;
-	atomic_t		tctl_shutdown;
-};
-
-/*
- * small data-structure for each page owned by tracefiled.
- */
-/* XXX nikita: this declaration is internal to tracefile.c and should probably
- * be moved there */
-struct cfs_trace_page {
-	/*
-	 * page itself
-	 */
-	struct page	  *page;
-	/*
-	 * linkage into one of the lists in trace_data_union or
-	 * page_collection
-	 */
-	struct list_head	   linkage;
-	/*
-	 * number of bytes used within this page
-	 */
-	unsigned int	 used;
-	/*
-	 * cpu that owns this page
-	 */
-	unsigned short       cpu;
-	/*
-	 * type(context) of this page
-	 */
-	unsigned short       type;
-};
-
 void cfs_set_ptldebug_header(struct ptldebug_header *header,
 			     struct libcfs_debug_msg_data *m,
 			     unsigned long stack);
-- 
2.1.0

[PATCH 36/45] staging/lustre/libcfs: Update comments style to match kernel

[green]

From: Oleg Drokin <green@linuxhacker.ru>

checkpatch complains that the trailing */ on the multiline comments
should be on it's own line.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c           | 18 +++++++++---------
 drivers/staging/lustre/lustre/libcfs/fail.c            |  3 ++-
 drivers/staging/lustre/lustre/libcfs/hash.c            | 18 ++++++++++++------
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c     |  3 ++-
 drivers/staging/lustre/lustre/libcfs/libcfs_string.c   |  3 ++-
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c |  9 ++++++---
 .../staging/lustre/lustre/libcfs/linux/linux-crypto.c  |  3 ++-
 .../lustre/lustre/libcfs/linux/linux-tracefile.c       |  3 ++-
 drivers/staging/lustre/lustre/libcfs/prng.c            | 13 +++++++------
 drivers/staging/lustre/lustre/libcfs/tracefile.c       | 14 +++++++++-----
 drivers/staging/lustre/lustre/libcfs/tracefile.h       |  6 ++++--
 drivers/staging/lustre/lustre/libcfs/workitem.c        | 12 ++++++++----
 12 files changed, 65 insertions(+), 40 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index fa81582..c90e510 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -82,7 +82,8 @@ static int libcfs_param_debug_mb_set(const char *val,
 
 /* While debug_mb setting look like unsigned int, in fact
  * it needs quite a bunch of extra processing, so we define special
- * debugmb parameter type with corresponding methods to handle this case */
+ * debugmb parameter type with corresponding methods to handle this case
+ */
 static struct kernel_param_ops param_ops_debugmb = {
 	.set = libcfs_param_debug_mb_set,
 	.get = param_get_uint,
@@ -227,8 +228,7 @@ MODULE_PARM_DESC(libcfs_debug_file_path,
 
 int libcfs_panic_in_progress;
 
-/* libcfs_debug_token2mask() expects the returned
- * string in lower-case */
+/* libcfs_debug_token2mask() expects the returned string in lower-case */
 static const char *
 libcfs_debug_subsys2str(int subsys)
 {
@@ -290,8 +290,7 @@ libcfs_debug_subsys2str(int subsys)
 	}
 }
 
-/* libcfs_debug_token2mask() expects the returned
- * string in lower-case */
+/* libcfs_debug_token2mask() expects the returned string in lower-case */
 static const char *
 libcfs_debug_dbg2str(int debug)
 {
@@ -470,7 +469,8 @@ void libcfs_debug_dumplog(void)
 
 	/* we're being careful to ensure that the kernel thread is
 	 * able to set our state to running as it exits before we
-	 * get to schedule() */
+	 * get to schedule()
+	 */
 	init_waitqueue_entry(&wait, current);
 	set_current_state(TASK_INTERRUPTIBLE);
 	add_wait_queue(&debug_ctlwq, &wait);
@@ -511,7 +511,8 @@ int libcfs_debug_init(unsigned long bufsize)
 	}
 
 	/* If libcfs_debug_mb is set to an invalid value or uninitialized
-	 * then just make the total buffers smp_num_cpus * TCD_MAX_PAGES */
+	 * then just make the total buffers smp_num_cpus * TCD_MAX_PAGES
+	 */
 	if (max > cfs_trace_max_debug_mb() || max < num_possible_cpus()) {
 		max = TCD_MAX_PAGES;
 	} else {
@@ -541,8 +542,7 @@ int libcfs_debug_clear_buffer(void)
 	return 0;
 }
 
-/* Debug markers, although printed by S_LNET
- * should not be be marked as such. */
+/* Debug markers, although printed by S_LNET should not be be marked as such. */
 #undef DEBUG_SUBSYSTEM
 #define DEBUG_SUBSYSTEM S_UNDEFINED
 int libcfs_debug_mark_buffer(const char *text)
diff --git a/drivers/staging/lustre/lustre/libcfs/fail.c b/drivers/staging/lustre/lustre/libcfs/fail.c
index 2783143..dadaf76 100644
--- a/drivers/staging/lustre/lustre/libcfs/fail.c
+++ b/drivers/staging/lustre/lustre/libcfs/fail.c
@@ -97,7 +97,8 @@ int __cfs_fail_check_set(__u32 id, __u32 value, int set)
 	/* Lost race to set CFS_FAILED_BIT. */
 	if (test_and_set_bit(CFS_FAILED_BIT, &cfs_fail_loc)) {
 		/* If CFS_FAIL_ONCE is valid, only one process can fail,
-		 * otherwise multi-process can fail at the same time. */
+		 * otherwise multi-process can fail at the same time.
+		 */
 		if (cfs_fail_loc & CFS_FAIL_ONCE)
 			return 0;
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index 414577c..5e2afe4 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -579,7 +579,8 @@ cfs_hash_bd_move_locked(struct cfs_hash *hs, struct cfs_hash_bd *bd_old,
 		return;
 
 	/* use cfs_hash_bd_hnode_add/del, to avoid atomic & refcount ops
-	 * in cfs_hash_bd_del/add_locked */
+	 * in cfs_hash_bd_del/add_locked
+	 */
 	hs->hs_hops->hop_hnode_del(hs, bd_old, hnode);
 	rc = hs->hs_hops->hop_hnode_add(hs, bd_new, hnode);
 	cfs_hash_bd_dep_record(hs, bd_new, rc);
@@ -635,7 +636,8 @@ cfs_hash_bd_lookup_intent(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 	int intent_add = (intent & CFS_HS_LOOKUP_MASK_ADD) != 0;
 
 	/* with this function, we can avoid a lot of useless refcount ops,
-	 * which are expensive atomic operations most time. */
+	 * which are expensive atomic operations most time.
+	 */
 	match = intent_add ? NULL : hnode;
 	hlist_for_each(ehnode, hhead) {
 		if (!cfs_hash_keycmp(hs, key, ehnode))
@@ -1109,7 +1111,8 @@ cfs_hash_destroy(struct cfs_hash *hs)
 					 hs->hs_name, bd.bd_bucket->hsb_index,
 					 bd.bd_offset, bd.bd_bucket->hsb_count);
 				/* can't assert key valicate, because we
-				 * can interrupt rehash */
+				 * can interrupt rehash
+				 */
 				cfs_hash_bd_del_locked(hs, &bd, hnode);
 				cfs_hash_exit(hs, hnode);
 			}
@@ -1160,7 +1163,8 @@ cfs_hash_rehash_bits(struct cfs_hash *hs)
 		return -EAGAIN;
 
 	/* XXX: need to handle case with max_theta != 2.0
-	 *      and the case with min_theta != 0.5 */
+	 *      and the case with min_theta != 0.5
+	 */
 	if ((hs->hs_cur_bits < hs->hs_max_bits) &&
 	    (__cfs_hash_theta(hs) > hs->hs_max_theta))
 		return hs->hs_cur_bits + 1;
@@ -1374,7 +1378,8 @@ cfs_hash_for_each_enter(struct cfs_hash *hs)
 	/* NB: iteration is mostly called by service thread,
 	 * we tend to cancel pending rehash-request, instead of
 	 * blocking service thread, we will relaunch rehash request
-	 * after iteration */
+	 * after iteration
+	 */
 	if (cfs_hash_is_rehashing(hs))
 		cfs_hash_rehash_cancel_locked(hs);
 	cfs_hash_unlock(hs, 1);
@@ -1987,7 +1992,8 @@ void cfs_hash_rehash_key(struct cfs_hash *hs, const void *old_key,
 		cfs_hash_bd_add_locked(hs, &new_bd, hnode);
 	}
 	/* overwrite key inside locks, otherwise may screw up with
-	 * other operations, i.e: rehash */
+	 * other operations, i.e: rehash
+	 */
 	cfs_hash_keycpy(hs, hnode, new_key);
 
 	cfs_hash_multi_bd_unlock(hs, bds, 3, 1);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
index 9c64bfd..2de9eea 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
@@ -110,7 +110,8 @@ cfs_percpt_lock(struct cfs_percpt_lock *pcl, int index)
 		if (i == 0) {
 			LASSERT(!pcl->pcl_locked);
 			/* nobody should take private lock after this
-			 * so I wouldn't starve for too long time */
+			 * so I wouldn't starve for too long time
+			 */
 			pcl->pcl_locked = 1;
 		}
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index f7cda59..4a2c83b 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -54,7 +54,8 @@ int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
 	 * and optionally an operator ('+' or '-').  If an operator
 	 * appears first in <str>, '*oldmask' is used as the starting point
 	 * (relative), otherwise minmask is used (absolute).  An operator
-	 * applies to all following tokens up to the next operator. */
+	 * applies to all following tokens up to the next operator.
+	 */
 	while (*str != '\0') {
 		while (isspace(*str))
 			str++;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 7fb277a..8d6a4ee 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -525,7 +525,8 @@ cfs_cpt_current(struct cfs_cpt_table *cptab, int remap)
 			return cpt;
 
 		/* don't return negative value for safety of upper layer,
-		 * instead we shadow the unknown cpu to a valid partition ID */
+		 * instead we shadow the unknown cpu to a valid partition ID
+		 */
 		cpt = cpu % cptab->ctb_nparts;
 	}
 
@@ -677,7 +678,8 @@ cfs_cpt_num_estimate(void)
 
 	/* generate reasonable number of CPU partitions based on total number
 	 * of CPUs, Preferred N should be power2 and match this condition:
-	 * 2 * (N - 1)^2 < NCPUS <= 2 * N^2 */
+	 * 2 * (N - 1)^2 < NCPUS <= 2 * N^2
+	 */
 	for (ncpt = 2; ncpu > 2 * ncpt * ncpt; ncpt <<= 1)
 		;
 
@@ -695,7 +697,8 @@ cfs_cpt_num_estimate(void)
  out:
 #if (BITS_PER_LONG == 32)
 	/* config many CPU partitions on 32-bit system could consume
-	 * too much memory */
+	 * too much memory
+	 */
 	ncpt = min(2U, ncpt);
 #endif
 	while (ncpu % ncpt != 0)
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index ccc25cd..44d1ad6 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -249,7 +249,8 @@ static int cfs_crypto_test_hashes(void)
 	unsigned char	   *data;
 	unsigned int	    j;
 	/* Data block size for testing hash. Maximum
-	 * kmalloc size for 2.6.18 kernel is 128K */
+	 * kmalloc size for 2.6.18 kernel is 128K
+	 */
 	unsigned int	    data_len = 1 * 128 * 1024;
 
 	data = kmalloc(data_len, 0);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 6cff79d..c50e24f 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -190,7 +190,8 @@ cfs_set_ptldebug_header(struct ptldebug_header *header,
 	header->ph_cpu_id = smp_processor_id();
 	header->ph_type = cfs_trace_buf_idx_get();
 	/* y2038 safe since all user space treats this as unsigned, but
-	 * will overflow in 2106 */
+	 * will overflow in 2106
+	 */
 	header->ph_sec = (u32)ts.tv_sec;
 	header->ph_usec = ts.tv_nsec / NSEC_PER_USEC;
 	header->ph_stack = stack;
diff --git a/drivers/staging/lustre/lustre/libcfs/prng.c b/drivers/staging/lustre/lustre/libcfs/prng.c
index 4147664..c75ae9a 100644
--- a/drivers/staging/lustre/lustre/libcfs/prng.c
+++ b/drivers/staging/lustre/lustre/libcfs/prng.c
@@ -42,11 +42,11 @@
 #include "../../include/linux/libcfs/libcfs.h"
 
 /*
-From: George Marsaglia <geo@stat.fsu.edu>
-Newsgroups: sci.math
-Subject: Re: A RANDOM NUMBER GENERATOR FOR C
-Date: Tue, 30 Sep 1997 05:29:35 -0700
-
+ * From: George Marsaglia <geo@stat.fsu.edu>
+ * Newsgroups: sci.math
+ * Subject: Re: A RANDOM NUMBER GENERATOR FOR C
+ * Date: Tue, 30 Sep 1997 05:29:35 -0700
+ *
  * You may replace the two constants 36969 and 18000 by any
  * pair of distinct constants from this list:
  * 18000 18030 18273 18513 18879 19074 19098 19164 19215 19584
@@ -58,7 +58,8 @@ Date: Tue, 30 Sep 1997 05:29:35 -0700
  * 27960 28320 28380 28689 28710 28794 28854 28959 28980 29013
  * 29379 29889 30135 30345 30459 30714 30903 30963 31059 31083
  * (or any other 16-bit constants k for which both k*2^16-1
- * and k*2^15-1 are prime) */
+ * and k*2^15-1 are prime)
+ */
 
 #define RANDOM_CONST_A 18030
 #define RANDOM_CONST_B 29013
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 298135f..b3abec6 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -317,7 +317,8 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 
 	/* cfs_trace_get_tcd() grabs a lock, which disables preemption and
 	 * pins us to a particular CPU.  This avoids an smp_processor_id()
-	 * warning on Linux when debugging is enabled. */
+	 * warning on Linux when debugging is enabled.
+	 */
 	cfs_set_ptldebug_header(&header, msgdata, CDEBUG_STACK());
 
 	if (!tcd)		/* arch may not log in IRQ context */
@@ -340,7 +341,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	if (libcfs_debug_binary)
 		known_size += sizeof(header);
 
-	/*/
+	/*
 	 * '2' used because vsnprintf return real size required for output
 	 * _without_ terminating NULL.
 	 * if needed is to small for this format.
@@ -536,7 +537,8 @@ panic_collect_pages(struct page_collection *pc)
 {
 	/* Do the collect_pages job on a single CPU: assumes that all other
 	 * CPUs have been stopped during a panic.  If this isn't true for some
-	 * arch, this will have to be implemented separately in each arch.  */
+	 * arch, this will have to be implemented separately in each arch.
+	 */
 	int			i;
 	int			j;
 	struct cfs_trace_cpu_data *tcd;
@@ -618,7 +620,8 @@ static void put_pages_back(struct page_collection *pc)
 /* Add pages to a per-cpu debug daemon ringbuffer.  This buffer makes sure that
  * we have a good amount of data at all times for dumping during an LBUG, even
  * if we have been steadily writing (and otherwise discarding) pages via the
- * debug daemon. */
+ * debug daemon.
+ */
 static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
 					 struct cfs_trace_cpu_data *tcd)
 {
@@ -730,7 +733,8 @@ int cfs_tracefile_dump_all_pages(char *filename)
 	}
 
 	/* ok, for now, just write the pages.  in the future we'll be building
-	 * iobufs with the pages and calling generic_direct_IO */
+	 * iobufs with the pages and calling generic_direct_IO
+	 */
 	MMSPACE_OPEN;
 	list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 2d4dc73..dffe07f 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -101,8 +101,10 @@ int cfs_trace_max_debug_mb(void);
 
 #define CFS_TRACEFILE_SIZE (500 << 20)
 
-/* Size of a buffer for sprinting console messages if we can't get a page
- * from system */
+/*
+ * Size of a buffer for sprinting console messages if we can't get a page
+ * from system
+ */
 #define CFS_TRACE_CONSOLE_BUFFER_SIZE   1024
 
 union cfs_trace_data_union {
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index e234dfe..08c5b19 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -54,11 +54,13 @@ struct cfs_wi_sched {
 	wait_queue_head_t		ws_waitq;
 	/** concurrent workitems */
 	struct list_head		ws_runq;
-	/** rescheduled running-workitems, a workitem can be rescheduled
+	/**
+	 * rescheduled running-workitems, a workitem can be rescheduled
 	 * while running in wi_action(), but we don't to execute it again
 	 * unless it returns from wi_action(), so we put it on ws_rerunq
 	 * while rescheduling, and move it to runq after it returns
-	 * from wi_action() */
+	 * from wi_action()
+	 */
 	struct list_head		ws_rerunq;
 	/** CPT-table for this scheduler */
 	struct cfs_cpt_table	*ws_cptab;
@@ -261,14 +263,16 @@ static int cfs_wi_scheduler(void *arg)
 
 			LASSERT(wi->wi_scheduled);
 			/* wi is rescheduled, should be on rerunq now, we
-			 * move it to runq so it can run action now */
+			 * move it to runq so it can run action now
+			 */
 			list_move_tail(&wi->wi_list, &sched->ws_runq);
 		}
 
 		if (!list_empty(&sched->ws_runq)) {
 			spin_unlock(&sched->ws_lock);
 			/* don't sleep because some workitems still
-			 * expect me to come back soon */
+			 * expect me to come back soon
+			 */
 			cond_resched();
 			spin_lock(&sched->ws_lock);
 			continue;
-- 
2.1.0

[lustre-devel] [PATCH 36/45] staging/lustre/libcfs: Update comments style to match kernel

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

checkpatch complains that the trailing */ on the multiline comments
should be on it's own line.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/debug.c           | 18 +++++++++---------
 drivers/staging/lustre/lustre/libcfs/fail.c            |  3 ++-
 drivers/staging/lustre/lustre/libcfs/hash.c            | 18 ++++++++++++------
 drivers/staging/lustre/lustre/libcfs/libcfs_lock.c     |  3 ++-
 drivers/staging/lustre/lustre/libcfs/libcfs_string.c   |  3 ++-
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c |  9 ++++++---
 .../staging/lustre/lustre/libcfs/linux/linux-crypto.c  |  3 ++-
 .../lustre/lustre/libcfs/linux/linux-tracefile.c       |  3 ++-
 drivers/staging/lustre/lustre/libcfs/prng.c            | 13 +++++++------
 drivers/staging/lustre/lustre/libcfs/tracefile.c       | 14 +++++++++-----
 drivers/staging/lustre/lustre/libcfs/tracefile.h       |  6 ++++--
 drivers/staging/lustre/lustre/libcfs/workitem.c        | 12 ++++++++----
 12 files changed, 65 insertions(+), 40 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/debug.c b/drivers/staging/lustre/lustre/libcfs/debug.c
index fa81582..c90e510 100644
--- a/drivers/staging/lustre/lustre/libcfs/debug.c
+++ b/drivers/staging/lustre/lustre/libcfs/debug.c
@@ -82,7 +82,8 @@ static int libcfs_param_debug_mb_set(const char *val,
 
 /* While debug_mb setting look like unsigned int, in fact
  * it needs quite a bunch of extra processing, so we define special
- * debugmb parameter type with corresponding methods to handle this case */
+ * debugmb parameter type with corresponding methods to handle this case
+ */
 static struct kernel_param_ops param_ops_debugmb = {
 	.set = libcfs_param_debug_mb_set,
 	.get = param_get_uint,
@@ -227,8 +228,7 @@ MODULE_PARM_DESC(libcfs_debug_file_path,
 
 int libcfs_panic_in_progress;
 
-/* libcfs_debug_token2mask() expects the returned
- * string in lower-case */
+/* libcfs_debug_token2mask() expects the returned string in lower-case */
 static const char *
 libcfs_debug_subsys2str(int subsys)
 {
@@ -290,8 +290,7 @@ libcfs_debug_subsys2str(int subsys)
 	}
 }
 
-/* libcfs_debug_token2mask() expects the returned
- * string in lower-case */
+/* libcfs_debug_token2mask() expects the returned string in lower-case */
 static const char *
 libcfs_debug_dbg2str(int debug)
 {
@@ -470,7 +469,8 @@ void libcfs_debug_dumplog(void)
 
 	/* we're being careful to ensure that the kernel thread is
 	 * able to set our state to running as it exits before we
-	 * get to schedule() */
+	 * get to schedule()
+	 */
 	init_waitqueue_entry(&wait, current);
 	set_current_state(TASK_INTERRUPTIBLE);
 	add_wait_queue(&debug_ctlwq, &wait);
@@ -511,7 +511,8 @@ int libcfs_debug_init(unsigned long bufsize)
 	}
 
 	/* If libcfs_debug_mb is set to an invalid value or uninitialized
-	 * then just make the total buffers smp_num_cpus * TCD_MAX_PAGES */
+	 * then just make the total buffers smp_num_cpus * TCD_MAX_PAGES
+	 */
 	if (max > cfs_trace_max_debug_mb() || max < num_possible_cpus()) {
 		max = TCD_MAX_PAGES;
 	} else {
@@ -541,8 +542,7 @@ int libcfs_debug_clear_buffer(void)
 	return 0;
 }
 
-/* Debug markers, although printed by S_LNET
- * should not be be marked as such. */
+/* Debug markers, although printed by S_LNET should not be be marked as such. */
 #undef DEBUG_SUBSYSTEM
 #define DEBUG_SUBSYSTEM S_UNDEFINED
 int libcfs_debug_mark_buffer(const char *text)
diff --git a/drivers/staging/lustre/lustre/libcfs/fail.c b/drivers/staging/lustre/lustre/libcfs/fail.c
index 2783143..dadaf76 100644
--- a/drivers/staging/lustre/lustre/libcfs/fail.c
+++ b/drivers/staging/lustre/lustre/libcfs/fail.c
@@ -97,7 +97,8 @@ int __cfs_fail_check_set(__u32 id, __u32 value, int set)
 	/* Lost race to set CFS_FAILED_BIT. */
 	if (test_and_set_bit(CFS_FAILED_BIT, &cfs_fail_loc)) {
 		/* If CFS_FAIL_ONCE is valid, only one process can fail,
-		 * otherwise multi-process can fail at the same time. */
+		 * otherwise multi-process can fail@the same time.
+		 */
 		if (cfs_fail_loc & CFS_FAIL_ONCE)
 			return 0;
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/hash.c b/drivers/staging/lustre/lustre/libcfs/hash.c
index 414577c..5e2afe4 100644
--- a/drivers/staging/lustre/lustre/libcfs/hash.c
+++ b/drivers/staging/lustre/lustre/libcfs/hash.c
@@ -579,7 +579,8 @@ cfs_hash_bd_move_locked(struct cfs_hash *hs, struct cfs_hash_bd *bd_old,
 		return;
 
 	/* use cfs_hash_bd_hnode_add/del, to avoid atomic & refcount ops
-	 * in cfs_hash_bd_del/add_locked */
+	 * in cfs_hash_bd_del/add_locked
+	 */
 	hs->hs_hops->hop_hnode_del(hs, bd_old, hnode);
 	rc = hs->hs_hops->hop_hnode_add(hs, bd_new, hnode);
 	cfs_hash_bd_dep_record(hs, bd_new, rc);
@@ -635,7 +636,8 @@ cfs_hash_bd_lookup_intent(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 	int intent_add = (intent & CFS_HS_LOOKUP_MASK_ADD) != 0;
 
 	/* with this function, we can avoid a lot of useless refcount ops,
-	 * which are expensive atomic operations most time. */
+	 * which are expensive atomic operations most time.
+	 */
 	match = intent_add ? NULL : hnode;
 	hlist_for_each(ehnode, hhead) {
 		if (!cfs_hash_keycmp(hs, key, ehnode))
@@ -1109,7 +1111,8 @@ cfs_hash_destroy(struct cfs_hash *hs)
 					 hs->hs_name, bd.bd_bucket->hsb_index,
 					 bd.bd_offset, bd.bd_bucket->hsb_count);
 				/* can't assert key valicate, because we
-				 * can interrupt rehash */
+				 * can interrupt rehash
+				 */
 				cfs_hash_bd_del_locked(hs, &bd, hnode);
 				cfs_hash_exit(hs, hnode);
 			}
@@ -1160,7 +1163,8 @@ cfs_hash_rehash_bits(struct cfs_hash *hs)
 		return -EAGAIN;
 
 	/* XXX: need to handle case with max_theta != 2.0
-	 *      and the case with min_theta != 0.5 */
+	 *      and the case with min_theta != 0.5
+	 */
 	if ((hs->hs_cur_bits < hs->hs_max_bits) &&
 	    (__cfs_hash_theta(hs) > hs->hs_max_theta))
 		return hs->hs_cur_bits + 1;
@@ -1374,7 +1378,8 @@ cfs_hash_for_each_enter(struct cfs_hash *hs)
 	/* NB: iteration is mostly called by service thread,
 	 * we tend to cancel pending rehash-request, instead of
 	 * blocking service thread, we will relaunch rehash request
-	 * after iteration */
+	 * after iteration
+	 */
 	if (cfs_hash_is_rehashing(hs))
 		cfs_hash_rehash_cancel_locked(hs);
 	cfs_hash_unlock(hs, 1);
@@ -1987,7 +1992,8 @@ void cfs_hash_rehash_key(struct cfs_hash *hs, const void *old_key,
 		cfs_hash_bd_add_locked(hs, &new_bd, hnode);
 	}
 	/* overwrite key inside locks, otherwise may screw up with
-	 * other operations, i.e: rehash */
+	 * other operations, i.e: rehash
+	 */
 	cfs_hash_keycpy(hs, hnode, new_key);
 
 	cfs_hash_multi_bd_unlock(hs, bds, 3, 1);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
index 9c64bfd..2de9eea 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_lock.c
@@ -110,7 +110,8 @@ cfs_percpt_lock(struct cfs_percpt_lock *pcl, int index)
 		if (i == 0) {
 			LASSERT(!pcl->pcl_locked);
 			/* nobody should take private lock after this
-			 * so I wouldn't starve for too long time */
+			 * so I wouldn't starve for too long time
+			 */
 			pcl->pcl_locked = 1;
 		}
 	}
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index f7cda59..4a2c83b 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -54,7 +54,8 @@ int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
 	 * and optionally an operator ('+' or '-').  If an operator
 	 * appears first in <str>, '*oldmask' is used as the starting point
 	 * (relative), otherwise minmask is used (absolute).  An operator
-	 * applies to all following tokens up to the next operator. */
+	 * applies to all following tokens up to the next operator.
+	 */
 	while (*str != '\0') {
 		while (isspace(*str))
 			str++;
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 7fb277a..8d6a4ee 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -525,7 +525,8 @@ cfs_cpt_current(struct cfs_cpt_table *cptab, int remap)
 			return cpt;
 
 		/* don't return negative value for safety of upper layer,
-		 * instead we shadow the unknown cpu to a valid partition ID */
+		 * instead we shadow the unknown cpu to a valid partition ID
+		 */
 		cpt = cpu % cptab->ctb_nparts;
 	}
 
@@ -677,7 +678,8 @@ cfs_cpt_num_estimate(void)
 
 	/* generate reasonable number of CPU partitions based on total number
 	 * of CPUs, Preferred N should be power2 and match this condition:
-	 * 2 * (N - 1)^2 < NCPUS <= 2 * N^2 */
+	 * 2 * (N - 1)^2 < NCPUS <= 2 * N^2
+	 */
 	for (ncpt = 2; ncpu > 2 * ncpt * ncpt; ncpt <<= 1)
 		;
 
@@ -695,7 +697,8 @@ cfs_cpt_num_estimate(void)
  out:
 #if (BITS_PER_LONG == 32)
 	/* config many CPU partitions on 32-bit system could consume
-	 * too much memory */
+	 * too much memory
+	 */
 	ncpt = min(2U, ncpt);
 #endif
 	while (ncpu % ncpt != 0)
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index ccc25cd..44d1ad6 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -249,7 +249,8 @@ static int cfs_crypto_test_hashes(void)
 	unsigned char	   *data;
 	unsigned int	    j;
 	/* Data block size for testing hash. Maximum
-	 * kmalloc size for 2.6.18 kernel is 128K */
+	 * kmalloc size for 2.6.18 kernel is 128K
+	 */
 	unsigned int	    data_len = 1 * 128 * 1024;
 
 	data = kmalloc(data_len, 0);
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 6cff79d..c50e24f 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -190,7 +190,8 @@ cfs_set_ptldebug_header(struct ptldebug_header *header,
 	header->ph_cpu_id = smp_processor_id();
 	header->ph_type = cfs_trace_buf_idx_get();
 	/* y2038 safe since all user space treats this as unsigned, but
-	 * will overflow in 2106 */
+	 * will overflow in 2106
+	 */
 	header->ph_sec = (u32)ts.tv_sec;
 	header->ph_usec = ts.tv_nsec / NSEC_PER_USEC;
 	header->ph_stack = stack;
diff --git a/drivers/staging/lustre/lustre/libcfs/prng.c b/drivers/staging/lustre/lustre/libcfs/prng.c
index 4147664..c75ae9a 100644
--- a/drivers/staging/lustre/lustre/libcfs/prng.c
+++ b/drivers/staging/lustre/lustre/libcfs/prng.c
@@ -42,11 +42,11 @@
 #include "../../include/linux/libcfs/libcfs.h"
 
 /*
-From: George Marsaglia <geo@stat.fsu.edu>
-Newsgroups: sci.math
-Subject: Re: A RANDOM NUMBER GENERATOR FOR C
-Date: Tue, 30 Sep 1997 05:29:35 -0700
-
+ * From: George Marsaglia <geo@stat.fsu.edu>
+ * Newsgroups: sci.math
+ * Subject: Re: A RANDOM NUMBER GENERATOR FOR C
+ * Date: Tue, 30 Sep 1997 05:29:35 -0700
+ *
  * You may replace the two constants 36969 and 18000 by any
  * pair of distinct constants from this list:
  * 18000 18030 18273 18513 18879 19074 19098 19164 19215 19584
@@ -58,7 +58,8 @@ Date: Tue, 30 Sep 1997 05:29:35 -0700
  * 27960 28320 28380 28689 28710 28794 28854 28959 28980 29013
  * 29379 29889 30135 30345 30459 30714 30903 30963 31059 31083
  * (or any other 16-bit constants k for which both k*2^16-1
- * and k*2^15-1 are prime) */
+ * and k*2^15-1 are prime)
+ */
 
 #define RANDOM_CONST_A 18030
 #define RANDOM_CONST_B 29013
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 298135f..b3abec6 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -317,7 +317,8 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 
 	/* cfs_trace_get_tcd() grabs a lock, which disables preemption and
 	 * pins us to a particular CPU.  This avoids an smp_processor_id()
-	 * warning on Linux when debugging is enabled. */
+	 * warning on Linux when debugging is enabled.
+	 */
 	cfs_set_ptldebug_header(&header, msgdata, CDEBUG_STACK());
 
 	if (!tcd)		/* arch may not log in IRQ context */
@@ -340,7 +341,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	if (libcfs_debug_binary)
 		known_size += sizeof(header);
 
-	/*/
+	/*
 	 * '2' used because vsnprintf return real size required for output
 	 * _without_ terminating NULL.
 	 * if needed is to small for this format.
@@ -536,7 +537,8 @@ panic_collect_pages(struct page_collection *pc)
 {
 	/* Do the collect_pages job on a single CPU: assumes that all other
 	 * CPUs have been stopped during a panic.  If this isn't true for some
-	 * arch, this will have to be implemented separately in each arch.  */
+	 * arch, this will have to be implemented separately in each arch.
+	 */
 	int			i;
 	int			j;
 	struct cfs_trace_cpu_data *tcd;
@@ -618,7 +620,8 @@ static void put_pages_back(struct page_collection *pc)
 /* Add pages to a per-cpu debug daemon ringbuffer.  This buffer makes sure that
  * we have a good amount of data at all times for dumping during an LBUG, even
  * if we have been steadily writing (and otherwise discarding) pages via the
- * debug daemon. */
+ * debug daemon.
+ */
 static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
 					 struct cfs_trace_cpu_data *tcd)
 {
@@ -730,7 +733,8 @@ int cfs_tracefile_dump_all_pages(char *filename)
 	}
 
 	/* ok, for now, just write the pages.  in the future we'll be building
-	 * iobufs with the pages and calling generic_direct_IO */
+	 * iobufs with the pages and calling generic_direct_IO
+	 */
 	MMSPACE_OPEN;
 	list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index 2d4dc73..dffe07f 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -101,8 +101,10 @@ int cfs_trace_max_debug_mb(void);
 
 #define CFS_TRACEFILE_SIZE (500 << 20)
 
-/* Size of a buffer for sprinting console messages if we can't get a page
- * from system */
+/*
+ * Size of a buffer for sprinting console messages if we can't get a page
+ * from system
+ */
 #define CFS_TRACE_CONSOLE_BUFFER_SIZE   1024
 
 union cfs_trace_data_union {
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index e234dfe..08c5b19 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -54,11 +54,13 @@ struct cfs_wi_sched {
 	wait_queue_head_t		ws_waitq;
 	/** concurrent workitems */
 	struct list_head		ws_runq;
-	/** rescheduled running-workitems, a workitem can be rescheduled
+	/**
+	 * rescheduled running-workitems, a workitem can be rescheduled
 	 * while running in wi_action(), but we don't to execute it again
 	 * unless it returns from wi_action(), so we put it on ws_rerunq
 	 * while rescheduling, and move it to runq after it returns
-	 * from wi_action() */
+	 * from wi_action()
+	 */
 	struct list_head		ws_rerunq;
 	/** CPT-table for this scheduler */
 	struct cfs_cpt_table	*ws_cptab;
@@ -261,14 +263,16 @@ static int cfs_wi_scheduler(void *arg)
 
 			LASSERT(wi->wi_scheduled);
 			/* wi is rescheduled, should be on rerunq now, we
-			 * move it to runq so it can run action now */
+			 * move it to runq so it can run action now
+			 */
 			list_move_tail(&wi->wi_list, &sched->ws_runq);
 		}
 
 		if (!list_empty(&sched->ws_runq)) {
 			spin_unlock(&sched->ws_lock);
 			/* don't sleep because some workitems still
-			 * expect me to come back soon */
+			 * expect me to come back soon
+			 */
 			cond_resched();
 			spin_lock(&sched->ws_lock);
 			continue;
-- 
2.1.0

[PATCH 37/45] staging/lustre/libcfs: Remove useless returns in void functions

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Return at the end of a void function does not serve any particular
purpose and makes checkpatch unhappy, so eliminate them.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c       | 2 --
 drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c    | 2 --
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 --
 drivers/staging/lustre/lustre/libcfs/workitem.c              | 3 ---
 4 files changed, 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 8d6a4ee..6c3e448 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -354,8 +354,6 @@ cfs_cpt_unset_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu)
 
 	if (i >= nr_cpu_ids)
 		node_clear(node, *cptab->ctb_nodemask);
-
-	return;
 }
 EXPORT_SYMBOL(cfs_cpt_unset_cpu);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index 44d1ad6..140134d 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -286,6 +286,4 @@ void cfs_crypto_unregister(void)
 {
 	if (adler32 == 0)
 		cfs_crypto_adler32_unregister();
-
-	return;
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index c50e24f..f0880a0 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -198,7 +198,6 @@ cfs_set_ptldebug_header(struct ptldebug_header *header,
 	header->ph_pid = current->pid;
 	header->ph_line_num = msgdata->msg_line;
 	header->ph_extern_pid = 0;
-	return;
 }
 
 static char *
@@ -252,7 +251,6 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
 		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
 		       fn, len, buf);
 	}
-	return;
 }
 
 int cfs_trace_max_debug_mb(void)
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 08c5b19..136bc13 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -131,8 +131,6 @@ cfs_wi_exit(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 
 	wi->wi_scheduled = 1; /* LBUG future schedule attempts */
 	spin_unlock(&sched->ws_lock);
-
-	return;
 }
 EXPORT_SYMBOL(cfs_wi_exit);
 
@@ -203,7 +201,6 @@ cfs_wi_schedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 
 	LASSERT(!list_empty(&wi->wi_list));
 	spin_unlock(&sched->ws_lock);
-	return;
 }
 EXPORT_SYMBOL(cfs_wi_schedule);
 
-- 
2.1.0

[lustre-devel] [PATCH 37/45] staging/lustre/libcfs: Remove useless returns in void functions

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Return at the end of a void function does not serve any particular
purpose and makes checkpatch unhappy, so eliminate them.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c       | 2 --
 drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c    | 2 --
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 --
 drivers/staging/lustre/lustre/libcfs/workitem.c              | 3 ---
 4 files changed, 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 8d6a4ee..6c3e448 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -354,8 +354,6 @@ cfs_cpt_unset_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu)
 
 	if (i >= nr_cpu_ids)
 		node_clear(node, *cptab->ctb_nodemask);
-
-	return;
 }
 EXPORT_SYMBOL(cfs_cpt_unset_cpu);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index 44d1ad6..140134d 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -286,6 +286,4 @@ void cfs_crypto_unregister(void)
 {
 	if (adler32 == 0)
 		cfs_crypto_adler32_unregister();
-
-	return;
 }
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index c50e24f..f0880a0 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -198,7 +198,6 @@ cfs_set_ptldebug_header(struct ptldebug_header *header,
 	header->ph_pid = current->pid;
 	header->ph_line_num = msgdata->msg_line;
 	header->ph_extern_pid = 0;
-	return;
 }
 
 static char *
@@ -252,7 +251,6 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
 		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
 		       fn, len, buf);
 	}
-	return;
 }
 
 int cfs_trace_max_debug_mb(void)
diff --git a/drivers/staging/lustre/lustre/libcfs/workitem.c b/drivers/staging/lustre/lustre/libcfs/workitem.c
index 08c5b19..136bc13 100644
--- a/drivers/staging/lustre/lustre/libcfs/workitem.c
+++ b/drivers/staging/lustre/lustre/libcfs/workitem.c
@@ -131,8 +131,6 @@ cfs_wi_exit(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 
 	wi->wi_scheduled = 1; /* LBUG future schedule attempts */
 	spin_unlock(&sched->ws_lock);
-
-	return;
 }
 EXPORT_SYMBOL(cfs_wi_exit);
 
@@ -203,7 +201,6 @@ cfs_wi_schedule(struct cfs_wi_sched *sched, cfs_workitem_t *wi)
 
 	LASSERT(!list_empty(&wi->wi_list));
 	spin_unlock(&sched->ws_lock);
-	return;
 }
 EXPORT_SYMBOL(cfs_wi_schedule);
 
-- 
2.1.0

[PATCH 38/45] staging/lustre/libcfs: Remove empty lines after/before braces

[green]

From: Oleg Drokin <green@linuxhacker.ru>

No need for an empty line after opening curvy brace and no need
for an empty line before the closing one too.
Remove them.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c    | 2 --
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 1 -
 drivers/staging/lustre/lustre/libcfs/module.c                | 1 -
 drivers/staging/lustre/lustre/libcfs/tracefile.c             | 4 ----
 4 files changed, 8 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index 140134d..b0b1244 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -125,7 +125,6 @@ struct cfs_crypto_hash_desc *
 	cfs_crypto_hash_init(unsigned char alg_id,
 			     unsigned char *key, unsigned int key_len)
 {
-
 	struct  hash_desc       *hdesc;
 	int		     err;
 	const struct cfs_crypto_hash_type       *type;
@@ -212,7 +211,6 @@ static void cfs_crypto_performance_test(unsigned char alg_id,
 					     hash, &hash_len);
 		if (err)
 			break;
-
 	}
 	end = jiffies;
 
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index f0880a0..eccf048 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -65,7 +65,6 @@ int cfs_tracefile_init_arch(void)
 				num_possible_cpus(), GFP_KERNEL);
 		if (!cfs_trace_data[i])
 			goto out;
-
 	}
 
 	/* arch related info initialized */
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index b8b69bb..ea3dc9b 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -549,7 +549,6 @@ void lustre_insert_debugfs(struct ctl_table *table,
 	for (; symlinks && symlinks->name; symlinks++)
 		debugfs_create_symlink(symlinks->name, lnet_debugfs_root,
 				       symlinks->target);
-
 }
 EXPORT_SYMBOL_GPL(lustre_insert_debugfs);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index b3abec6..53c1dd6 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -598,7 +598,6 @@ static void put_pages_back_on_all_cpus(struct page_collection *pc)
 
 			list_for_each_entry_safe(tage, tmp, &pc->pc_pages,
 						 linkage) {
-
 				__LASSERT_TAGE_INVARIANT(tage);
 
 				if (tage->cpu != cpu || tage->type != i)
@@ -629,7 +628,6 @@ static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
 	struct cfs_trace_page *tmp;
 
 	list_for_each_entry_safe(tage, tmp, &pc->pc_pages, linkage) {
-
 		__LASSERT_TAGE_INVARIANT(tage);
 
 		if (tage->cpu != tcd->tcd_cpu || tage->type != tcd->tcd_type)
@@ -737,7 +735,6 @@ int cfs_tracefile_dump_all_pages(char *filename)
 	 */
 	MMSPACE_OPEN;
 	list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
-
 		__LASSERT_TAGE_INVARIANT(tage);
 
 		buf = kmap(tage->page);
@@ -775,7 +772,6 @@ void cfs_trace_flush_pages(void)
 	pc.pc_want_daemon_pages = 1;
 	collect_pages(&pc);
 	list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
-
 		__LASSERT_TAGE_INVARIANT(tage);
 
 		list_del(&tage->linkage);
-- 
2.1.0

[lustre-devel] [PATCH 38/45] staging/lustre/libcfs: Remove empty lines after/before braces

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

No need for an empty line after opening curvy brace and no need
for an empty line before the closing one too.
Remove them.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c    | 2 --
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 1 -
 drivers/staging/lustre/lustre/libcfs/module.c                | 1 -
 drivers/staging/lustre/lustre/libcfs/tracefile.c             | 4 ----
 4 files changed, 8 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index 140134d..b0b1244 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -125,7 +125,6 @@ struct cfs_crypto_hash_desc *
 	cfs_crypto_hash_init(unsigned char alg_id,
 			     unsigned char *key, unsigned int key_len)
 {
-
 	struct  hash_desc       *hdesc;
 	int		     err;
 	const struct cfs_crypto_hash_type       *type;
@@ -212,7 +211,6 @@ static void cfs_crypto_performance_test(unsigned char alg_id,
 					     hash, &hash_len);
 		if (err)
 			break;
-
 	}
 	end = jiffies;
 
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index f0880a0..eccf048 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -65,7 +65,6 @@ int cfs_tracefile_init_arch(void)
 				num_possible_cpus(), GFP_KERNEL);
 		if (!cfs_trace_data[i])
 			goto out;
-
 	}
 
 	/* arch related info initialized */
diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c
index b8b69bb..ea3dc9b 100644
--- a/drivers/staging/lustre/lustre/libcfs/module.c
+++ b/drivers/staging/lustre/lustre/libcfs/module.c
@@ -549,7 +549,6 @@ void lustre_insert_debugfs(struct ctl_table *table,
 	for (; symlinks && symlinks->name; symlinks++)
 		debugfs_create_symlink(symlinks->name, lnet_debugfs_root,
 				       symlinks->target);
-
 }
 EXPORT_SYMBOL_GPL(lustre_insert_debugfs);
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index b3abec6..53c1dd6 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -598,7 +598,6 @@ static void put_pages_back_on_all_cpus(struct page_collection *pc)
 
 			list_for_each_entry_safe(tage, tmp, &pc->pc_pages,
 						 linkage) {
-
 				__LASSERT_TAGE_INVARIANT(tage);
 
 				if (tage->cpu != cpu || tage->type != i)
@@ -629,7 +628,6 @@ static void put_pages_on_tcd_daemon_list(struct page_collection *pc,
 	struct cfs_trace_page *tmp;
 
 	list_for_each_entry_safe(tage, tmp, &pc->pc_pages, linkage) {
-
 		__LASSERT_TAGE_INVARIANT(tage);
 
 		if (tage->cpu != tcd->tcd_cpu || tage->type != tcd->tcd_type)
@@ -737,7 +735,6 @@ int cfs_tracefile_dump_all_pages(char *filename)
 	 */
 	MMSPACE_OPEN;
 	list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
-
 		__LASSERT_TAGE_INVARIANT(tage);
 
 		buf = kmap(tage->page);
@@ -775,7 +772,6 @@ void cfs_trace_flush_pages(void)
 	pc.pc_want_daemon_pages = 1;
 	collect_pages(&pc);
 	list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) {
-
 		__LASSERT_TAGE_INVARIANT(tage);
 
 		list_del(&tage->linkage);
-- 
2.1.0

[PATCH 39/45] staging/lustre: Update cfs_cpu_notify switch statement with a comment

[green]

From: Oleg Drokin <green@linuxhacker.ru>

We do really mean to fall through to that default case statement from
all previous ones, so add a comment to unconfuse verious tools

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 6c3e448..7318b77 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -939,6 +939,7 @@ cfs_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
 		spin_lock(&cpt_data.cpt_lock);
 		cpt_data.cpt_version++;
 		spin_unlock(&cpt_data.cpt_lock);
+		/* Fall through */
 	default:
 		if (action != CPU_DEAD && action != CPU_DEAD_FROZEN) {
 			CDEBUG(D_INFO, "CPU changed [cpu %u action %lx]\n",
-- 
2.1.0

[lustre-devel] [PATCH 39/45] staging/lustre: Update cfs_cpu_notify switch statement with a comment

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

We do really mean to fall through to that default case statement from
all previous ones, so add a comment to unconfuse verious tools

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
index 6c3e448..7318b77 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c
@@ -939,6 +939,7 @@ cfs_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
 		spin_lock(&cpt_data.cpt_lock);
 		cpt_data.cpt_version++;
 		spin_unlock(&cpt_data.cpt_lock);
+		/* Fall through */
 	default:
 		if (action != CPU_DEAD && action != CPU_DEAD_FROZEN) {
 			CDEBUG(D_INFO, "CPU changed [cpu %u action %lx]\n",
-- 
2.1.0

[PATCH 40/45] staging/lustre: Get rid of cfs_trace_buf_type_t typedef

[green]

From: Oleg Drokin <green@linuxhacker.ru>

Replace it with enum cfs_trace_buf_type

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.h             | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index eccf048..809ea50 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -130,7 +130,7 @@ void cfs_tracefile_write_unlock(void)
 	up_write(&cfs_tracefile_sem);
 }
 
-cfs_trace_buf_type_t cfs_trace_buf_idx_get(void)
+enum cfs_trace_buf_type cfs_trace_buf_idx_get(void)
 {
 	if (in_irq())
 		return CFS_TCD_TYPE_IRQ;
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index dffe07f..4c77f90 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -39,12 +39,12 @@
 
 #include "../../include/linux/libcfs/libcfs.h"
 
-typedef enum {
+enum cfs_trace_buf_type {
 	CFS_TCD_TYPE_PROC = 0,
 	CFS_TCD_TYPE_SOFTIRQ,
 	CFS_TCD_TYPE_IRQ,
 	CFS_TCD_TYPE_MAX
-} cfs_trace_buf_type_t;
+};
 
 /* trace file lock routines */
 
@@ -208,7 +208,7 @@ int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking);
 void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking);
 
 extern char *cfs_trace_console_buffers[NR_CPUS][CFS_TCD_TYPE_MAX];
-cfs_trace_buf_type_t cfs_trace_buf_idx_get(void);
+enum cfs_trace_buf_type cfs_trace_buf_idx_get(void);
 
 static inline char *
 cfs_trace_get_console_buffer(void)
-- 
2.1.0

[lustre-devel] [PATCH 40/45] staging/lustre: Get rid of cfs_trace_buf_type_t typedef

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

Replace it with enum cfs_trace_buf_type

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c | 2 +-
 drivers/staging/lustre/lustre/libcfs/tracefile.h             | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index eccf048..809ea50 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -130,7 +130,7 @@ void cfs_tracefile_write_unlock(void)
 	up_write(&cfs_tracefile_sem);
 }
 
-cfs_trace_buf_type_t cfs_trace_buf_idx_get(void)
+enum cfs_trace_buf_type cfs_trace_buf_idx_get(void)
 {
 	if (in_irq())
 		return CFS_TCD_TYPE_IRQ;
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.h b/drivers/staging/lustre/lustre/libcfs/tracefile.h
index dffe07f..4c77f90 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.h
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.h
@@ -39,12 +39,12 @@
 
 #include "../../include/linux/libcfs/libcfs.h"
 
-typedef enum {
+enum cfs_trace_buf_type {
 	CFS_TCD_TYPE_PROC = 0,
 	CFS_TCD_TYPE_SOFTIRQ,
 	CFS_TCD_TYPE_IRQ,
 	CFS_TCD_TYPE_MAX
-} cfs_trace_buf_type_t;
+};
 
 /* trace file lock routines */
 
@@ -208,7 +208,7 @@ int cfs_trace_lock_tcd(struct cfs_trace_cpu_data *tcd, int walking);
 void cfs_trace_unlock_tcd(struct cfs_trace_cpu_data *tcd, int walking);
 
 extern char *cfs_trace_console_buffers[NR_CPUS][CFS_TCD_TYPE_MAX];
-cfs_trace_buf_type_t cfs_trace_buf_idx_get(void);
+enum cfs_trace_buf_type cfs_trace_buf_idx_get(void);
 
 static inline char *
 cfs_trace_get_console_buffer(void)
-- 
2.1.0

[PATCH 41/45] staging/lustre/libcfs: Get rid of multiple assignments

[green]

From: Oleg Drokin <green@linuxhacker.ru>

They make checkpatch unhappy, and I guess overall might confuse
people too.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c    | 7 ++++---
 drivers/staging/lustre/lustre/libcfs/libcfs_string.c | 6 ++++--
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
index 7396d66..c5a6951 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
@@ -82,9 +82,10 @@ cfs_percpt_alloc(struct cfs_cpt_table *cptab, unsigned int size)
 	if (!arr)
 		return NULL;
 
-	arr->va_size	= size = L1_CACHE_ALIGN(size);
-	arr->va_count	= count;
-	arr->va_cptab	= cptab;
+	size = L1_CACHE_ALIGN(size);
+	arr->va_size = size;
+	arr->va_count = count;
+	arr->va_cptab = cptab;
 
 	for (i = 0; i < count; i++) {
 		LIBCFS_CPT_ALLOC(arr->va_ptrs[i], cptab, i, size);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index 4a2c83b..09ab0e4 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -337,8 +337,10 @@ cfs_range_expr_print(char *buffer, int count, struct cfs_range_expr *expr,
 	char s[] = "[";
 	char e[] = "]";
 
-	if (bracketed)
-		s[0] = e[0] = '\0';
+	if (bracketed) {
+		s[0] = '\0';
+		e[0] = '\0';
+	}
 
 	if (expr->re_lo == expr->re_hi)
 		i = scnprintf(buffer, count, "%u", expr->re_lo);
-- 
2.1.0

[lustre-devel] [PATCH 41/45] staging/lustre/libcfs: Get rid of multiple assignments

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

They make checkpatch unhappy, and I guess overall might confuse
people too.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/libcfs_mem.c    | 7 ++++---
 drivers/staging/lustre/lustre/libcfs/libcfs_string.c | 6 ++++--
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
index 7396d66..c5a6951 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_mem.c
@@ -82,9 +82,10 @@ cfs_percpt_alloc(struct cfs_cpt_table *cptab, unsigned int size)
 	if (!arr)
 		return NULL;
 
-	arr->va_size	= size = L1_CACHE_ALIGN(size);
-	arr->va_count	= count;
-	arr->va_cptab	= cptab;
+	size = L1_CACHE_ALIGN(size);
+	arr->va_size = size;
+	arr->va_count = count;
+	arr->va_cptab = cptab;
 
 	for (i = 0; i < count; i++) {
 		LIBCFS_CPT_ALLOC(arr->va_ptrs[i], cptab, i, size);
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index 4a2c83b..09ab0e4 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -337,8 +337,10 @@ cfs_range_expr_print(char *buffer, int count, struct cfs_range_expr *expr,
 	char s[] = "[";
 	char e[] = "]";
 
-	if (bracketed)
-		s[0] = e[0] = '\0';
+	if (bracketed) {
+		s[0] = '\0';
+		e[0] = '\0';
+	}
 
 	if (expr->re_lo == expr->re_hi)
 		i = scnprintf(buffer, count, "%u", expr->re_lo);
-- 
2.1.0

[PATCH 42/45] staging/lustre: Remove space after cast in cfs_crypto_hash_final()

[green]

From: Oleg Drokin <green@linuxhacker.ru>

This is against kernel-code style.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index b0b1244..19a5132 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -183,7 +183,7 @@ int cfs_crypto_hash_final(struct cfs_crypto_hash_desc *hdesc,
 		*hash_len = size;
 		return -ENOSPC;
 	}
-	err = crypto_hash_final((struct hash_desc *) hdesc, hash);
+	err = crypto_hash_final((struct hash_desc *)hdesc, hash);
 
 	if (err < 0) {
 		/* May be caller can fix error */
-- 
2.1.0

[lustre-devel] [PATCH 42/45] staging/lustre: Remove space after cast in cfs_crypto_hash_final()

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

This is against kernel-code style.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
index b0b1244..19a5132 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-crypto.c
@@ -183,7 +183,7 @@ int cfs_crypto_hash_final(struct cfs_crypto_hash_desc *hdesc,
 		*hash_len = size;
 		return -ENOSPC;
 	}
-	err = crypto_hash_final((struct hash_desc *) hdesc, hash);
+	err = crypto_hash_final((struct hash_desc *)hdesc, hash);
 
 	if (err < 0) {
 		/* May be caller can fix error */
-- 
2.1.0

[PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[green]

From: Oleg Drokin <green@linuxhacker.ru>

This pacifies checkpatch amongst other things, also is shorter to write
and avoiding calls to printk_ratelimit() is also good.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 .../lustre/lustre/libcfs/linux/linux-tracefile.c   | 10 ++--
 drivers/staging/lustre/lustre/libcfs/tracefile.c   | 53 +++++++++-------------
 2 files changed, 27 insertions(+), 36 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 809ea50..5aba132 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -89,7 +89,7 @@ int cfs_tracefile_init_arch(void)
 
 out:
 	cfs_tracefile_fini_arch();
-	printk(KERN_ERR "lnet: Not enough memory\n");
+	pr_err("lnet: Not enough memory\n");
 	return -ENOMEM;
 }
 
@@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
 	}
 
 	if ((mask & D_CONSOLE) != 0) {
-		printk("%s%s: %.*s", ptype, prefix, len, buf);
+		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
 	} else {
-		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
-		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
-		       fn, len, buf);
+		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
+			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
+			fn, len, buf);
 	}
 }
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 53c1dd6..7df8f0a 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -194,11 +194,9 @@ cfs_trace_get_tage_try(struct cfs_trace_cpu_data *tcd, unsigned long len)
 		} else {
 			tage = cfs_tage_alloc(GFP_ATOMIC);
 			if (unlikely(!tage)) {
-				if ((!memory_pressure_get() ||
-				     in_interrupt()) && printk_ratelimit())
-					printk(KERN_WARNING
-					       "cannot allocate a tage (%ld)\n",
-					       tcd->tcd_cur_pages);
+				if ((!memory_pressure_get() || in_interrupt()))
+					pr_warn_ratelimited("cannot allocate a tage (%ld)\n",
+							    tcd->tcd_cur_pages);
 				return NULL;
 			}
 		}
@@ -233,9 +231,8 @@ static void cfs_tcd_shrink(struct cfs_trace_cpu_data *tcd)
 	 * from here: this will lead to infinite recursion.
 	 */
 
-	if (printk_ratelimit())
-		printk(KERN_WARNING "debug daemon buffer overflowed; discarding 10%% of pages (%d of %ld)\n",
-		       pgcount + 1, tcd->tcd_cur_pages);
+	pr_warn_ratelimited("debug daemon buffer overflowed; discarding 10%% of pages (%d of %ld)\n",
+			    pgcount + 1, tcd->tcd_cur_pages);
 
 	INIT_LIST_HEAD(&pc.pc_pages);
 
@@ -362,8 +359,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 
 		max_nob = PAGE_CACHE_SIZE - tage->used - known_size;
 		if (max_nob <= 0) {
-			printk(KERN_EMERG "negative max_nob: %d\n",
-			       max_nob);
+			pr_emerg("negative max_nob: %d\n", max_nob);
 			mask |= D_ERROR;
 			cfs_trace_put_tcd(tcd);
 			tcd = NULL;
@@ -393,8 +389,8 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	}
 
 	if (*(string_buf + needed - 1) != '\n')
-		printk(KERN_INFO "format at %s:%d:%s doesn't end in newline\n",
-		       file, msgdata->msg_line, msgdata->msg_fn);
+		pr_info("format at %s:%d:%s doesn't end in newline\n",
+			file, msgdata->msg_line, msgdata->msg_fn);
 
 	header.ph_len = known_size + needed;
 	debug_buf = (char *)page_address(tage->page) + tage->used;
@@ -743,8 +739,8 @@ int cfs_tracefile_dump_all_pages(char *filename)
 		kunmap(tage->page);
 
 		if (rc != (int)tage->used) {
-			printk(KERN_WARNING "wanted to write %u but wrote %d\n",
-			       tage->used, rc);
+			pr_warn("wanted to write %u but wrote %d\n",
+				tage->used, rc);
 			put_pages_back(&pc);
 			__LASSERT(list_empty(&pc.pc_pages));
 			break;
@@ -895,10 +891,8 @@ int cfs_trace_daemon_command(char *str)
 	} else {
 		strcpy(cfs_tracefile, str);
 
-		printk(KERN_INFO
-		       "Lustre: debug daemon will attempt to start writing to %s (%lukB max)\n",
-		       cfs_tracefile,
-		       (long)(cfs_tracefile_size >> 10));
+		pr_info("Lustre: debug daemon will attempt to start writing to %s (%lukB max)\n",
+			cfs_tracefile, (long)(cfs_tracefile_size >> 10));
 
 		cfs_trace_start_thread();
 	}
@@ -934,16 +928,14 @@ int cfs_trace_set_debug_mb(int mb)
 	struct cfs_trace_cpu_data *tcd;
 
 	if (mb < num_possible_cpus()) {
-		printk(KERN_WARNING
-		       "Lustre: %d MB is too small for debug buffer size, setting it to %d MB.\n",
-		       mb, num_possible_cpus());
+		pr_warn("Lustre: %d MB is too small for debug buffer size, setting it to %d MB.\n",
+			mb, num_possible_cpus());
 		mb = num_possible_cpus();
 	}
 
 	if (mb > limit) {
-		printk(KERN_WARNING
-		       "Lustre: %d MB is too large for debug buffer size, setting it to %d MB.\n",
-		       mb, limit);
+		pr_warn("Lustre: %d MB is too large for debug buffer size, setting it to %d MB.\n",
+			mb, limit);
 		mb = limit;
 	}
 
@@ -1012,8 +1004,8 @@ static int tracefiled(void *arg)
 			if (IS_ERR(filp)) {
 				rc = PTR_ERR(filp);
 				filp = NULL;
-				printk(KERN_WARNING "couldn't open %s: %d\n",
-				       cfs_tracefile, rc);
+				pr_warn("couldn't open %s: %d\n",
+					cfs_tracefile, rc);
 			}
 		}
 		cfs_tracefile_read_unlock();
@@ -1041,8 +1033,8 @@ static int tracefiled(void *arg)
 			kunmap(tage->page);
 
 			if (rc != (int)tage->used) {
-				printk(KERN_WARNING "wanted to write %u but wrote %d\n",
-				       tage->used, rc);
+				pr_warn("wanted to write %u but wrote %d\n",
+					tage->used, rc);
 				put_pages_back(&pc);
 				__LASSERT(list_empty(&pc.pc_pages));
 				break;
@@ -1055,7 +1047,7 @@ static int tracefiled(void *arg)
 		if (!list_empty(&pc.pc_pages)) {
 			int i;
 
-			printk(KERN_ALERT "Lustre: trace pages aren't empty\n");
+			pr_alert("Lustre: trace pages aren't empty\n");
 			pr_err("total cpus(%d): ", num_possible_cpus());
 			for (i = 0; i < num_possible_cpus(); i++)
 				if (cpu_online(i))
@@ -1123,8 +1115,7 @@ void cfs_trace_stop_thread(void)
 
 	mutex_lock(&cfs_trace_thread_mutex);
 	if (thread_running) {
-		printk(KERN_INFO
-		       "Lustre: shutting down debug daemon thread...\n");
+		pr_info("Lustre: shutting down debug daemon thread...\n");
 		atomic_set(&tctl->tctl_shutdown, 1);
 		wait_for_completion(&tctl->tctl_stop);
 		thread_running = 0;
-- 
2.1.0

[lustre-devel] [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

This pacifies checkpatch amongst other things, also is shorter to write
and avoiding calls to printk_ratelimit() is also good.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 .../lustre/lustre/libcfs/linux/linux-tracefile.c   | 10 ++--
 drivers/staging/lustre/lustre/libcfs/tracefile.c   | 53 +++++++++-------------
 2 files changed, 27 insertions(+), 36 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
index 809ea50..5aba132 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
@@ -89,7 +89,7 @@ int cfs_tracefile_init_arch(void)
 
 out:
 	cfs_tracefile_fini_arch();
-	printk(KERN_ERR "lnet: Not enough memory\n");
+	pr_err("lnet: Not enough memory\n");
 	return -ENOMEM;
 }
 
@@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
 	}
 
 	if ((mask & D_CONSOLE) != 0) {
-		printk("%s%s: %.*s", ptype, prefix, len, buf);
+		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
 	} else {
-		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
-		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
-		       fn, len, buf);
+		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
+			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
+			fn, len, buf);
 	}
 }
 
diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 53c1dd6..7df8f0a 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -194,11 +194,9 @@ cfs_trace_get_tage_try(struct cfs_trace_cpu_data *tcd, unsigned long len)
 		} else {
 			tage = cfs_tage_alloc(GFP_ATOMIC);
 			if (unlikely(!tage)) {
-				if ((!memory_pressure_get() ||
-				     in_interrupt()) && printk_ratelimit())
-					printk(KERN_WARNING
-					       "cannot allocate a tage (%ld)\n",
-					       tcd->tcd_cur_pages);
+				if ((!memory_pressure_get() || in_interrupt()))
+					pr_warn_ratelimited("cannot allocate a tage (%ld)\n",
+							    tcd->tcd_cur_pages);
 				return NULL;
 			}
 		}
@@ -233,9 +231,8 @@ static void cfs_tcd_shrink(struct cfs_trace_cpu_data *tcd)
 	 * from here: this will lead to infinite recursion.
 	 */
 
-	if (printk_ratelimit())
-		printk(KERN_WARNING "debug daemon buffer overflowed; discarding 10%% of pages (%d of %ld)\n",
-		       pgcount + 1, tcd->tcd_cur_pages);
+	pr_warn_ratelimited("debug daemon buffer overflowed; discarding 10%% of pages (%d of %ld)\n",
+			    pgcount + 1, tcd->tcd_cur_pages);
 
 	INIT_LIST_HEAD(&pc.pc_pages);
 
@@ -362,8 +359,7 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 
 		max_nob = PAGE_CACHE_SIZE - tage->used - known_size;
 		if (max_nob <= 0) {
-			printk(KERN_EMERG "negative max_nob: %d\n",
-			       max_nob);
+			pr_emerg("negative max_nob: %d\n", max_nob);
 			mask |= D_ERROR;
 			cfs_trace_put_tcd(tcd);
 			tcd = NULL;
@@ -393,8 +389,8 @@ int libcfs_debug_vmsg2(struct libcfs_debug_msg_data *msgdata,
 	}
 
 	if (*(string_buf + needed - 1) != '\n')
-		printk(KERN_INFO "format@%s:%d:%s doesn't end in newline\n",
-		       file, msgdata->msg_line, msgdata->msg_fn);
+		pr_info("format at %s:%d:%s doesn't end in newline\n",
+			file, msgdata->msg_line, msgdata->msg_fn);
 
 	header.ph_len = known_size + needed;
 	debug_buf = (char *)page_address(tage->page) + tage->used;
@@ -743,8 +739,8 @@ int cfs_tracefile_dump_all_pages(char *filename)
 		kunmap(tage->page);
 
 		if (rc != (int)tage->used) {
-			printk(KERN_WARNING "wanted to write %u but wrote %d\n",
-			       tage->used, rc);
+			pr_warn("wanted to write %u but wrote %d\n",
+				tage->used, rc);
 			put_pages_back(&pc);
 			__LASSERT(list_empty(&pc.pc_pages));
 			break;
@@ -895,10 +891,8 @@ int cfs_trace_daemon_command(char *str)
 	} else {
 		strcpy(cfs_tracefile, str);
 
-		printk(KERN_INFO
-		       "Lustre: debug daemon will attempt to start writing to %s (%lukB max)\n",
-		       cfs_tracefile,
-		       (long)(cfs_tracefile_size >> 10));
+		pr_info("Lustre: debug daemon will attempt to start writing to %s (%lukB max)\n",
+			cfs_tracefile, (long)(cfs_tracefile_size >> 10));
 
 		cfs_trace_start_thread();
 	}
@@ -934,16 +928,14 @@ int cfs_trace_set_debug_mb(int mb)
 	struct cfs_trace_cpu_data *tcd;
 
 	if (mb < num_possible_cpus()) {
-		printk(KERN_WARNING
-		       "Lustre: %d MB is too small for debug buffer size, setting it to %d MB.\n",
-		       mb, num_possible_cpus());
+		pr_warn("Lustre: %d MB is too small for debug buffer size, setting it to %d MB.\n",
+			mb, num_possible_cpus());
 		mb = num_possible_cpus();
 	}
 
 	if (mb > limit) {
-		printk(KERN_WARNING
-		       "Lustre: %d MB is too large for debug buffer size, setting it to %d MB.\n",
-		       mb, limit);
+		pr_warn("Lustre: %d MB is too large for debug buffer size, setting it to %d MB.\n",
+			mb, limit);
 		mb = limit;
 	}
 
@@ -1012,8 +1004,8 @@ static int tracefiled(void *arg)
 			if (IS_ERR(filp)) {
 				rc = PTR_ERR(filp);
 				filp = NULL;
-				printk(KERN_WARNING "couldn't open %s: %d\n",
-				       cfs_tracefile, rc);
+				pr_warn("couldn't open %s: %d\n",
+					cfs_tracefile, rc);
 			}
 		}
 		cfs_tracefile_read_unlock();
@@ -1041,8 +1033,8 @@ static int tracefiled(void *arg)
 			kunmap(tage->page);
 
 			if (rc != (int)tage->used) {
-				printk(KERN_WARNING "wanted to write %u but wrote %d\n",
-				       tage->used, rc);
+				pr_warn("wanted to write %u but wrote %d\n",
+					tage->used, rc);
 				put_pages_back(&pc);
 				__LASSERT(list_empty(&pc.pc_pages));
 				break;
@@ -1055,7 +1047,7 @@ static int tracefiled(void *arg)
 		if (!list_empty(&pc.pc_pages)) {
 			int i;
 
-			printk(KERN_ALERT "Lustre: trace pages aren't empty\n");
+			pr_alert("Lustre: trace pages aren't empty\n");
 			pr_err("total cpus(%d): ", num_possible_cpus());
 			for (i = 0; i < num_possible_cpus(); i++)
 				if (cpu_online(i))
@@ -1123,8 +1115,7 @@ void cfs_trace_stop_thread(void)
 
 	mutex_lock(&cfs_trace_thread_mutex);
 	if (thread_running) {
-		printk(KERN_INFO
-		       "Lustre: shutting down debug daemon thread...\n");
+		pr_info("Lustre: shutting down debug daemon thread...\n");
 		atomic_set(&tctl->tctl_shutdown, 1);
 		wait_for_completion(&tctl->tctl_stop);
 		thread_running = 0;
-- 
2.1.0

[PATCH 44/45] staging/lustre: Convert cfs_trace_daemon_command to use kstrtoul

[green]

From: Oleg Drokin <green@linuxhacker.ru>

simple_strtoul is obsolete

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/tracefile.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 7df8f0a..510673d 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -878,12 +878,15 @@ int cfs_trace_daemon_command(char *str)
 		memset(cfs_tracefile, 0, sizeof(cfs_tracefile));
 
 	} else if (strncmp(str, "size=", 5) == 0) {
-		cfs_tracefile_size = simple_strtoul(str + 5, NULL, 0);
-		if (cfs_tracefile_size < 10 || cfs_tracefile_size > 20480)
-			cfs_tracefile_size = CFS_TRACEFILE_SIZE;
-		else
-			cfs_tracefile_size <<= 20;
-
+		unsigned long tmp;
+
+		rc = kstrtoul(str + 5, 10, &tmp);
+		if (!rc) {
+			if (tmp < 10 || tmp > 20480)
+				cfs_tracefile_size = CFS_TRACEFILE_SIZE;
+			else
+				cfs_tracefile_size = tmp << 20;
+		}
 	} else if (strlen(str) >= sizeof(cfs_tracefile)) {
 		rc = -ENAMETOOLONG;
 	} else if (str[0] != '/') {
-- 
2.1.0

[lustre-devel] [PATCH 44/45] staging/lustre: Convert cfs_trace_daemon_command to use kstrtoul

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

simple_strtoul is obsolete

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/tracefile.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/tracefile.c b/drivers/staging/lustre/lustre/libcfs/tracefile.c
index 7df8f0a..510673d 100644
--- a/drivers/staging/lustre/lustre/libcfs/tracefile.c
+++ b/drivers/staging/lustre/lustre/libcfs/tracefile.c
@@ -878,12 +878,15 @@ int cfs_trace_daemon_command(char *str)
 		memset(cfs_tracefile, 0, sizeof(cfs_tracefile));
 
 	} else if (strncmp(str, "size=", 5) == 0) {
-		cfs_tracefile_size = simple_strtoul(str + 5, NULL, 0);
-		if (cfs_tracefile_size < 10 || cfs_tracefile_size > 20480)
-			cfs_tracefile_size = CFS_TRACEFILE_SIZE;
-		else
-			cfs_tracefile_size <<= 20;
-
+		unsigned long tmp;
+
+		rc = kstrtoul(str + 5, 10, &tmp);
+		if (!rc) {
+			if (tmp < 10 || tmp > 20480)
+				cfs_tracefile_size = CFS_TRACEFILE_SIZE;
+			else
+				cfs_tracefile_size = tmp << 20;
+		}
 	} else if (strlen(str) >= sizeof(cfs_tracefile)) {
 		rc = -ENAMETOOLONG;
 	} else if (str[0] != '/') {
-- 
2.1.0

[PATCH 45/45] staging/lustre: Convert cfs_str2num_check to use kstrtoul

[green]

From: Oleg Drokin <green@linuxhacker.ru>

simple_strtoul is obsolete

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/libcfs_string.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index 09ab0e4..9dca666 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -229,18 +229,13 @@ int
 cfs_str2num_check(char *str, int nob, unsigned *num,
 		  unsigned min, unsigned max)
 {
-	char	*endp;
+	int rc;
 
 	str = cfs_trimwhite(str);
-	*num = simple_strtoul(str, &endp, 0);
-	if (endp == str)
+	rc = kstrtouint(str, 10, num);
+	if (rc)
 		return 0;
 
-	for (; endp < str + nob; endp++) {
-		if (!isspace(*endp))
-			return 0;
-	}
-
 	return (*num >= min && *num <= max);
 }
 EXPORT_SYMBOL(cfs_str2num_check);
-- 
2.1.0

[lustre-devel] [PATCH 45/45] staging/lustre: Convert cfs_str2num_check to use kstrtoul

[green at linuxhacker.ru]

From: Oleg Drokin <green@linuxhacker.ru>

simple_strtoul is obsolete

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 drivers/staging/lustre/lustre/libcfs/libcfs_string.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
index 09ab0e4..9dca666 100644
--- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
+++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c
@@ -229,18 +229,13 @@ int
 cfs_str2num_check(char *str, int nob, unsigned *num,
 		  unsigned min, unsigned max)
 {
-	char	*endp;
+	int rc;
 
 	str = cfs_trimwhite(str);
-	*num = simple_strtoul(str, &endp, 0);
-	if (endp == str)
+	rc = kstrtouint(str, 10, num);
+	if (rc)
 		return 0;
 
-	for (; endp < str + nob; endp++) {
-		if (!isspace(*endp))
-			return 0;
-	}
-
 	return (*num >= min && *num <= max);
 }
 EXPORT_SYMBOL(cfs_str2num_check);
-- 
2.1.0

Re: [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[Joe Perches]

On Tue, 2016-02-16 at 00:47 -0500, green@linuxhacker.ru wrote:
> From: Oleg Drokin <green@linuxhacker.ru>
> 
> This pacifies checkpatch amongst other things, also is shorter to write
> and avoiding calls to printk_ratelimit() is also good.
[]
> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
[]
> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
>  	}
>  
>  	if ((mask & D_CONSOLE) != 0) {
> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
>  	} else {
> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> -		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> -		       fn, len, buf);
> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> +			fn, len, buf);
>  	}
>  }

This breaks the currently correct output.

ptype is already a KERN_<LEVEL>

	char *prefix = "Lustre", *ptype = NULL;

	if ((mask & D_EMERG) != 0) {
		prefix = dbghdr_to_err_string(hdr);
		ptype = KERN_EMERG;
	} else if ((mask & D_ERROR) != 0) {
		prefix = dbghdr_to_err_string(hdr);
		ptype = KERN_ERR;
	} else if ((mask & D_WARNING) != 0) {
		prefix = dbghdr_to_info_string(hdr);
		ptype = KERN_WARNING;
	} else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
		prefix = dbghdr_to_info_string(hdr);
		ptype = KERN_INFO;
	}

[lustre-devel] [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[Joe Perches]

On Tue, 2016-02-16 at 00:47 -0500, green at linuxhacker.ru wrote:
> From: Oleg Drokin <green@linuxhacker.ru>
> 
> This pacifies checkpatch amongst other things, also is shorter to write
> and avoiding calls to printk_ratelimit() is also good.
[]
> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
[]
> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
> ?	}
> ?
> ?	if ((mask & D_CONSOLE) != 0) {
> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
> ?	} else {
> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> -		???????hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> -		???????fn, len, buf);
> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> +			fn, len, buf);
> ?	}
> ?}

This breaks the currently correct output.

ptype is already a KERN_<LEVEL>

	char *prefix = "Lustre", *ptype = NULL;

	if ((mask & D_EMERG) != 0) {
		prefix = dbghdr_to_err_string(hdr);
		ptype = KERN_EMERG;
	} else if ((mask & D_ERROR) != 0) {
		prefix = dbghdr_to_err_string(hdr);
		ptype = KERN_ERR;
	} else if ((mask & D_WARNING) != 0) {
		prefix = dbghdr_to_info_string(hdr);
		ptype = KERN_WARNING;
	} else if ((mask & (D_CONSOLE | libcfs_printk)) != 0) {
		prefix = dbghdr_to_info_string(hdr);
		ptype = KERN_INFO;
	}

Re: [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[Oleg Drokin]

On Feb 16, 2016, at 12:55 AM, Joe Perches wrote:

> On Tue, 2016-02-16 at 00:47 -0500, green@linuxhacker.ru wrote:
>> From: Oleg Drokin <green@linuxhacker.ru>
>> 
>> This pacifies checkpatch amongst other things, also is shorter to write
>> and avoiding calls to printk_ratelimit() is also good.
> []
>> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
> []
>> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
>>  	}
>>  
>>  	if ((mask & D_CONSOLE) != 0) {
>> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
>> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
>>  	} else {
>> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
>> -		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
>> -		       fn, len, buf);
>> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
>> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
>> +			fn, len, buf);
>>  	}
>>  }
> 
> This breaks the currently correct output.

Hm, you are right. Thanks!
I guess this patch just needs some redoing.

Greg, if you can skip this patch but still apply the rest of the series, that would be great.
I just tested that the whole thing builds and runs fine with this patch omitted.

Bye,
    Oleg

[lustre-devel] [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[Oleg Drokin]

On Feb 16, 2016, at 12:55 AM, Joe Perches wrote:

> On Tue, 2016-02-16 at 00:47 -0500, green at linuxhacker.ru wrote:
>> From: Oleg Drokin <green@linuxhacker.ru>
>> 
>> This pacifies checkpatch amongst other things, also is shorter to write
>> and avoiding calls to printk_ratelimit() is also good.
> []
>> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
> []
>> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
>>  	}
>>  
>>  	if ((mask & D_CONSOLE) != 0) {
>> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
>> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
>>  	} else {
>> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
>> -		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
>> -		       fn, len, buf);
>> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
>> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
>> +			fn, len, buf);
>>  	}
>>  }
> 
> This breaks the currently correct output.

Hm, you are right. Thanks!
I guess this patch just needs some redoing.

Greg, if you can skip this patch but still apply the rest of the series, that would be great.
I just tested that the whole thing builds and runs fine with this patch omitted.

Bye,
    Oleg

Re: [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[Greg Kroah-Hartman]

On Tue, Feb 16, 2016 at 11:12:14AM -0500, Oleg Drokin wrote:
> 
> On Feb 16, 2016, at 12:55 AM, Joe Perches wrote:
> 
> > On Tue, 2016-02-16 at 00:47 -0500, green@linuxhacker.ru wrote:
> >> From: Oleg Drokin <green@linuxhacker.ru>
> >> 
> >> This pacifies checkpatch amongst other things, also is shorter to write
> >> and avoiding calls to printk_ratelimit() is also good.
> > []
> >> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
> > []
> >> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
> >>  	}
> >>  
> >>  	if ((mask & D_CONSOLE) != 0) {
> >> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
> >> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
> >>  	} else {
> >> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> >> -		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> >> -		       fn, len, buf);
> >> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> >> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> >> +			fn, len, buf);
> >>  	}
> >>  }
> > 
> > This breaks the currently correct output.
> 
> Hm, you are right. Thanks!
> I guess this patch just needs some redoing.
> 
> Greg, if you can skip this patch but still apply the rest of the series, that would be great.
> I just tested that the whole thing builds and runs fine with this patch omitted.

Ok, now skipped, thanks.

greg k-h

[lustre-devel] [PATCH 43/45] staging/lustre/libcfs: Replace use of printk with pr_<level>

[Greg Kroah-Hartman]

On Tue, Feb 16, 2016 at 11:12:14AM -0500, Oleg Drokin wrote:
> 
> On Feb 16, 2016, at 12:55 AM, Joe Perches wrote:
> 
> > On Tue, 2016-02-16 at 00:47 -0500, green at linuxhacker.ru wrote:
> >> From: Oleg Drokin <green@linuxhacker.ru>
> >> 
> >> This pacifies checkpatch amongst other things, also is shorter to write
> >> and avoiding calls to printk_ratelimit() is also good.
> > []
> >> diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tracefile.c
> > []
> >> @@ -244,11 +244,11 @@ void cfs_print_to_console(struct ptldebug_header *hdr, int mask,
> >>  	}
> >>  
> >>  	if ((mask & D_CONSOLE) != 0) {
> >> -		printk("%s%s: %.*s", ptype, prefix, len, buf);
> >> +		pr_err("%s%s: %.*s", ptype, prefix, len, buf);
> >>  	} else {
> >> -		printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> >> -		       hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> >> -		       fn, len, buf);
> >> +		pr_warn("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix,
> >> +			hdr->ph_pid, hdr->ph_extern_pid, file, hdr->ph_line_num,
> >> +			fn, len, buf);
> >>  	}
> >>  }
> > 
> > This breaks the currently correct output.
> 
> Hm, you are right. Thanks!
> I guess this patch just needs some redoing.
> 
> Greg, if you can skip this patch but still apply the rest of the series, that would be great.
> I just tested that the whole thing builds and runs fine with this patch omitted.

Ok, now skipped, thanks.

greg k-h