[PATCH 0/8] Miscellaneous DRBD reorganization

[PATCH 0/8] Miscellaneous DRBD reorganization

[Christoph Böhmwalder]

Some more mostly trivial "alignment patches" to (slowly but surely)
move further in the direction of re-upstreaming DRBD.

These should be fairly uncontroversial.

Andreas Gruenbacher (1):
  drbd: drbd_insert_interval(): Clarify comment

Christoph Böhmwalder (5):
  drbd: adjust drbd_limits license header
  drbd: make limits unsigned
  drbd: remove unnecessary assignment in vli_encode_bits
  drbd: remove macros using require_context
  MAINTAINERS: add drbd headers

Lars Ellenberg (1):
  drbd: interval tree: make removing an "empty" interval a no-op

Robert Altnoeder (1):
  drbd: fix DRBD_VOLUME_MAX 65535 -> 65534

 MAINTAINERS                        |   1 +
 drivers/block/drbd/drbd_int.h      |  12 +-
 drivers/block/drbd/drbd_interval.c |   6 +-
 drivers/block/drbd/drbd_vli.h      |   2 +-
 include/linux/drbd_limits.h        | 204 ++++++++++++++---------------
 5 files changed, 110 insertions(+), 115 deletions(-)


base-commit: f596da3efaf4130ff61cd029558845808df9bf99
-- 
2.38.1

[PATCH 1/8] drbd: adjust drbd_limits license header

[Christoph Böhmwalder]

See also commit 93c68cc46a07 ("drbd: use consistent license"). We only
want to license drbd under GPL-2.0, so use the corresponding SPDX header
consistently.

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 include/linux/drbd_limits.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index 9e33f7038bea..d64271ccece4 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
   drbd_limits.h
   This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
-- 
2.38.1

[PATCH 2/8] drbd: fix DRBD_VOLUME_MAX 65535 -> 65534

[Christoph Böhmwalder]

From: Robert Altnoeder <robert.altnoeder@linbit.com>

The protocol uses -1 as a reserved value for
'no specific volume', and since the protocol field
is a 16 bit unsigned value, -1 is converted to
65535. Therefore, limit the range of valid volume
numbers to [0, 65534].

Signed-off-by: Robert Altnoeder <robert.altnoeder@linbit.com>
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 include/linux/drbd_limits.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index d64271ccece4..058f7600f79c 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -21,7 +21,7 @@
 #define DRBD_MINOR_COUNT_DEF 32
 #define DRBD_MINOR_COUNT_SCALE '1'
 
-#define DRBD_VOLUME_MAX 65535
+#define DRBD_VOLUME_MAX 65534
 
 #define DRBD_DIALOG_REFRESH_MIN 0
 #define DRBD_DIALOG_REFRESH_MAX 600
-- 
2.38.1

[PATCH 3/8] drbd: make limits unsigned

[Christoph Böhmwalder]

These are almost always used as unsigned integers, so mark them as such.

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 include/linux/drbd_limits.h | 202 ++++++++++++++++++------------------
 1 file changed, 101 insertions(+), 101 deletions(-)

diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index 058f7600f79c..5b042fb427e9 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -16,123 +16,123 @@
 
 #define DEBUG_RANGE_CHECK 0
 
-#define DRBD_MINOR_COUNT_MIN 1
-#define DRBD_MINOR_COUNT_MAX 255
-#define DRBD_MINOR_COUNT_DEF 32
+#define DRBD_MINOR_COUNT_MIN 1U
+#define DRBD_MINOR_COUNT_MAX 255U
+#define DRBD_MINOR_COUNT_DEF 32U
 #define DRBD_MINOR_COUNT_SCALE '1'
 
-#define DRBD_VOLUME_MAX 65534
+#define DRBD_VOLUME_MAX 65534U
 
-#define DRBD_DIALOG_REFRESH_MIN 0
-#define DRBD_DIALOG_REFRESH_MAX 600
+#define DRBD_DIALOG_REFRESH_MIN 0U
+#define DRBD_DIALOG_REFRESH_MAX 600U
 #define DRBD_DIALOG_REFRESH_SCALE '1'
 
 /* valid port number */
-#define DRBD_PORT_MIN 1
-#define DRBD_PORT_MAX 0xffff
+#define DRBD_PORT_MIN 1U
+#define DRBD_PORT_MAX 0xffffU
 #define DRBD_PORT_SCALE '1'
 
 /* startup { */
   /* if you want more than 3.4 days, disable */
-#define DRBD_WFC_TIMEOUT_MIN 0
-#define DRBD_WFC_TIMEOUT_MAX 300000
-#define DRBD_WFC_TIMEOUT_DEF 0
+#define DRBD_WFC_TIMEOUT_MIN 0U
+#define DRBD_WFC_TIMEOUT_MAX 300000U
+#define DRBD_WFC_TIMEOUT_DEF 0U
 #define DRBD_WFC_TIMEOUT_SCALE '1'
 
-#define DRBD_DEGR_WFC_TIMEOUT_MIN 0
-#define DRBD_DEGR_WFC_TIMEOUT_MAX 300000
-#define DRBD_DEGR_WFC_TIMEOUT_DEF 0
+#define DRBD_DEGR_WFC_TIMEOUT_MIN 0U
+#define DRBD_DEGR_WFC_TIMEOUT_MAX 300000U
+#define DRBD_DEGR_WFC_TIMEOUT_DEF 0U
 #define DRBD_DEGR_WFC_TIMEOUT_SCALE '1'
 
-#define DRBD_OUTDATED_WFC_TIMEOUT_MIN 0
-#define DRBD_OUTDATED_WFC_TIMEOUT_MAX 300000
-#define DRBD_OUTDATED_WFC_TIMEOUT_DEF 0
+#define DRBD_OUTDATED_WFC_TIMEOUT_MIN 0U
+#define DRBD_OUTDATED_WFC_TIMEOUT_MAX 300000U
+#define DRBD_OUTDATED_WFC_TIMEOUT_DEF 0U
 #define DRBD_OUTDATED_WFC_TIMEOUT_SCALE '1'
 /* }*/
 
 /* net { */
   /* timeout, unit centi seconds
    * more than one minute timeout is not useful */
-#define DRBD_TIMEOUT_MIN 1
-#define DRBD_TIMEOUT_MAX 600
-#define DRBD_TIMEOUT_DEF 60       /* 6 seconds */
+#define DRBD_TIMEOUT_MIN 1U
+#define DRBD_TIMEOUT_MAX 600U
+#define DRBD_TIMEOUT_DEF 60U       /* 6 seconds */
 #define DRBD_TIMEOUT_SCALE '1'
 
  /* If backing disk takes longer than disk_timeout, mark the disk as failed */
-#define DRBD_DISK_TIMEOUT_MIN 0    /* 0 = disabled */
-#define DRBD_DISK_TIMEOUT_MAX 6000 /* 10 Minutes */
-#define DRBD_DISK_TIMEOUT_DEF 0    /* disabled */
+#define DRBD_DISK_TIMEOUT_MIN 0U    /* 0 = disabled */
+#define DRBD_DISK_TIMEOUT_MAX 6000U /* 10 Minutes */
+#define DRBD_DISK_TIMEOUT_DEF 0U    /* disabled */
 #define DRBD_DISK_TIMEOUT_SCALE '1'
 
   /* active connection retries when C_WF_CONNECTION */
-#define DRBD_CONNECT_INT_MIN 1
-#define DRBD_CONNECT_INT_MAX 120
-#define DRBD_CONNECT_INT_DEF 10   /* seconds */
+#define DRBD_CONNECT_INT_MIN 1U
+#define DRBD_CONNECT_INT_MAX 120U
+#define DRBD_CONNECT_INT_DEF 10U   /* seconds */
 #define DRBD_CONNECT_INT_SCALE '1'
 
   /* keep-alive probes when idle */
-#define DRBD_PING_INT_MIN 1
-#define DRBD_PING_INT_MAX 120
-#define DRBD_PING_INT_DEF 10
+#define DRBD_PING_INT_MIN 1U
+#define DRBD_PING_INT_MAX 120U
+#define DRBD_PING_INT_DEF 10U
 #define DRBD_PING_INT_SCALE '1'
 
  /* timeout for the ping packets.*/
-#define DRBD_PING_TIMEO_MIN  1
-#define DRBD_PING_TIMEO_MAX  300
-#define DRBD_PING_TIMEO_DEF  5
+#define DRBD_PING_TIMEO_MIN  1U
+#define DRBD_PING_TIMEO_MAX  300U
+#define DRBD_PING_TIMEO_DEF  5U
 #define DRBD_PING_TIMEO_SCALE '1'
 
   /* max number of write requests between write barriers */
-#define DRBD_MAX_EPOCH_SIZE_MIN 1
-#define DRBD_MAX_EPOCH_SIZE_MAX 20000
-#define DRBD_MAX_EPOCH_SIZE_DEF 2048
+#define DRBD_MAX_EPOCH_SIZE_MIN 1U
+#define DRBD_MAX_EPOCH_SIZE_MAX 20000U
+#define DRBD_MAX_EPOCH_SIZE_DEF 2048U
 #define DRBD_MAX_EPOCH_SIZE_SCALE '1'
 
   /* I don't think that a tcp send buffer of more than 10M is useful */
-#define DRBD_SNDBUF_SIZE_MIN  0
-#define DRBD_SNDBUF_SIZE_MAX  (10<<20)
-#define DRBD_SNDBUF_SIZE_DEF  0
+#define DRBD_SNDBUF_SIZE_MIN  0U
+#define DRBD_SNDBUF_SIZE_MAX  (10U<<20)
+#define DRBD_SNDBUF_SIZE_DEF  0U
 #define DRBD_SNDBUF_SIZE_SCALE '1'
 
-#define DRBD_RCVBUF_SIZE_MIN  0
-#define DRBD_RCVBUF_SIZE_MAX  (10<<20)
-#define DRBD_RCVBUF_SIZE_DEF  0
+#define DRBD_RCVBUF_SIZE_MIN  0U
+#define DRBD_RCVBUF_SIZE_MAX  (10U<<20)
+#define DRBD_RCVBUF_SIZE_DEF  0U
 #define DRBD_RCVBUF_SIZE_SCALE '1'
 
   /* @4k PageSize -> 128kB - 512MB */
-#define DRBD_MAX_BUFFERS_MIN  32
-#define DRBD_MAX_BUFFERS_MAX  131072
-#define DRBD_MAX_BUFFERS_DEF  2048
+#define DRBD_MAX_BUFFERS_MIN  32U
+#define DRBD_MAX_BUFFERS_MAX  131072U
+#define DRBD_MAX_BUFFERS_DEF  2048U
 #define DRBD_MAX_BUFFERS_SCALE '1'
 
   /* @4k PageSize -> 4kB - 512MB */
-#define DRBD_UNPLUG_WATERMARK_MIN  1
-#define DRBD_UNPLUG_WATERMARK_MAX  131072
+#define DRBD_UNPLUG_WATERMARK_MIN  1U
+#define DRBD_UNPLUG_WATERMARK_MAX  131072U
 #define DRBD_UNPLUG_WATERMARK_DEF (DRBD_MAX_BUFFERS_DEF/16)
 #define DRBD_UNPLUG_WATERMARK_SCALE '1'
 
   /* 0 is disabled.
    * 200 should be more than enough even for very short timeouts */
-#define DRBD_KO_COUNT_MIN  0
-#define DRBD_KO_COUNT_MAX  200
-#define DRBD_KO_COUNT_DEF  7
+#define DRBD_KO_COUNT_MIN  0U
+#define DRBD_KO_COUNT_MAX  200U
+#define DRBD_KO_COUNT_DEF  7U
 #define DRBD_KO_COUNT_SCALE '1'
 /* } */
 
 /* syncer { */
   /* FIXME allow rate to be zero? */
-#define DRBD_RESYNC_RATE_MIN 1
+#define DRBD_RESYNC_RATE_MIN 1U
 /* channel bonding 10 GbE, or other hardware */
 #define DRBD_RESYNC_RATE_MAX (4 << 20)
-#define DRBD_RESYNC_RATE_DEF 250
+#define DRBD_RESYNC_RATE_DEF 250U
 #define DRBD_RESYNC_RATE_SCALE 'k'  /* kilobytes */
 
-#define DRBD_AL_EXTENTS_MIN  67
+#define DRBD_AL_EXTENTS_MIN  67U
   /* we use u16 as "slot number", (u16)~0 is "FREE".
    * If you use >= 292 kB on-disk ring buffer,
    * this is the maximum you can use: */
-#define DRBD_AL_EXTENTS_MAX  0xfffe
-#define DRBD_AL_EXTENTS_DEF  1237
+#define DRBD_AL_EXTENTS_MAX  0xfffeU
+#define DRBD_AL_EXTENTS_DEF  1237U
 #define DRBD_AL_EXTENTS_SCALE '1'
 
 #define DRBD_MINOR_NUMBER_MIN  -1
@@ -147,9 +147,9 @@
  * the upper limit with 64bit kernel, enough ram and flexible meta data
  * is 1 PiB, currently. */
 /* DRBD_MAX_SECTORS */
-#define DRBD_DISK_SIZE_MIN  0
-#define DRBD_DISK_SIZE_MAX  (1 * (2LLU << 40))
-#define DRBD_DISK_SIZE_DEF  0 /* = disabled = no user size... */
+#define DRBD_DISK_SIZE_MIN  0LLU
+#define DRBD_DISK_SIZE_MAX  (1LLU * (2LLU << 40))
+#define DRBD_DISK_SIZE_DEF  0LLU /* = disabled = no user size... */
 #define DRBD_DISK_SIZE_SCALE 's'  /* sectors */
 
 #define DRBD_ON_IO_ERROR_DEF EP_DETACH
@@ -162,39 +162,39 @@
 #define DRBD_ON_CONGESTION_DEF OC_BLOCK
 #define DRBD_READ_BALANCING_DEF RB_PREFER_LOCAL
 
-#define DRBD_MAX_BIO_BVECS_MIN 0
-#define DRBD_MAX_BIO_BVECS_MAX 128
-#define DRBD_MAX_BIO_BVECS_DEF 0
+#define DRBD_MAX_BIO_BVECS_MIN 0U
+#define DRBD_MAX_BIO_BVECS_MAX 128U
+#define DRBD_MAX_BIO_BVECS_DEF 0U
 #define DRBD_MAX_BIO_BVECS_SCALE '1'
 
-#define DRBD_C_PLAN_AHEAD_MIN  0
-#define DRBD_C_PLAN_AHEAD_MAX  300
-#define DRBD_C_PLAN_AHEAD_DEF  20
+#define DRBD_C_PLAN_AHEAD_MIN  0U
+#define DRBD_C_PLAN_AHEAD_MAX  300U
+#define DRBD_C_PLAN_AHEAD_DEF  20U
 #define DRBD_C_PLAN_AHEAD_SCALE '1'
 
-#define DRBD_C_DELAY_TARGET_MIN 1
-#define DRBD_C_DELAY_TARGET_MAX 100
-#define DRBD_C_DELAY_TARGET_DEF 10
+#define DRBD_C_DELAY_TARGET_MIN 1U
+#define DRBD_C_DELAY_TARGET_MAX 100U
+#define DRBD_C_DELAY_TARGET_DEF 10U
 #define DRBD_C_DELAY_TARGET_SCALE '1'
 
-#define DRBD_C_FILL_TARGET_MIN 0
-#define DRBD_C_FILL_TARGET_MAX (1<<20) /* 500MByte in sec */
-#define DRBD_C_FILL_TARGET_DEF 100 /* Try to place 50KiB in socket send buffer during resync */
+#define DRBD_C_FILL_TARGET_MIN 0U
+#define DRBD_C_FILL_TARGET_MAX (1U<<20) /* 500MByte in sec */
+#define DRBD_C_FILL_TARGET_DEF 100U /* Try to place 50KiB in socket send buffer during resync */
 #define DRBD_C_FILL_TARGET_SCALE 's'  /* sectors */
 
-#define DRBD_C_MAX_RATE_MIN     250
-#define DRBD_C_MAX_RATE_MAX     (4 << 20)
-#define DRBD_C_MAX_RATE_DEF     102400
+#define DRBD_C_MAX_RATE_MIN     250U
+#define DRBD_C_MAX_RATE_MAX     (4U << 20)
+#define DRBD_C_MAX_RATE_DEF     102400U
 #define DRBD_C_MAX_RATE_SCALE	'k'  /* kilobytes */
 
-#define DRBD_C_MIN_RATE_MIN     0
-#define DRBD_C_MIN_RATE_MAX     (4 << 20)
-#define DRBD_C_MIN_RATE_DEF     250
+#define DRBD_C_MIN_RATE_MIN     0U
+#define DRBD_C_MIN_RATE_MAX     (4U << 20)
+#define DRBD_C_MIN_RATE_DEF     250U
 #define DRBD_C_MIN_RATE_SCALE	'k'  /* kilobytes */
 
-#define DRBD_CONG_FILL_MIN	0
-#define DRBD_CONG_FILL_MAX	(10<<21) /* 10GByte in sectors */
-#define DRBD_CONG_FILL_DEF	0
+#define DRBD_CONG_FILL_MIN	0U
+#define DRBD_CONG_FILL_MAX	(10U<<21) /* 10GByte in sectors */
+#define DRBD_CONG_FILL_DEF	0U
 #define DRBD_CONG_FILL_SCALE	's'  /* sectors */
 
 #define DRBD_CONG_EXTENTS_MIN	DRBD_AL_EXTENTS_MIN
@@ -204,48 +204,48 @@
 
 #define DRBD_PROTOCOL_DEF DRBD_PROT_C
 
-#define DRBD_DISK_BARRIER_DEF	0
-#define DRBD_DISK_FLUSHES_DEF	1
-#define DRBD_DISK_DRAIN_DEF	1
-#define DRBD_MD_FLUSHES_DEF	1
-#define DRBD_TCP_CORK_DEF	1
-#define DRBD_AL_UPDATES_DEF     1
+#define DRBD_DISK_BARRIER_DEF	0U
+#define DRBD_DISK_FLUSHES_DEF	1U
+#define DRBD_DISK_DRAIN_DEF	1U
+#define DRBD_MD_FLUSHES_DEF	1U
+#define DRBD_TCP_CORK_DEF	1U
+#define DRBD_AL_UPDATES_DEF     1U
 
 /* We used to ignore the discard_zeroes_data setting.
  * To not change established (and expected) behaviour,
  * by default assume that, for discard_zeroes_data=0,
  * we can make that an effective discard_zeroes_data=1,
  * if we only explicitly zero-out unaligned partial chunks. */
-#define DRBD_DISCARD_ZEROES_IF_ALIGNED_DEF 1
+#define DRBD_DISCARD_ZEROES_IF_ALIGNED_DEF 1U
 
 /* Some backends pretend to support WRITE SAME,
  * but fail such requests when they are actually submitted.
  * This is to tell DRBD to not even try. */
-#define DRBD_DISABLE_WRITE_SAME_DEF 0
+#define DRBD_DISABLE_WRITE_SAME_DEF 0U
 
-#define DRBD_ALLOW_TWO_PRIMARIES_DEF	0
-#define DRBD_ALWAYS_ASBP_DEF	0
-#define DRBD_USE_RLE_DEF	1
-#define DRBD_CSUMS_AFTER_CRASH_ONLY_DEF 0
+#define DRBD_ALLOW_TWO_PRIMARIES_DEF	0U
+#define DRBD_ALWAYS_ASBP_DEF	0U
+#define DRBD_USE_RLE_DEF	1U
+#define DRBD_CSUMS_AFTER_CRASH_ONLY_DEF 0U
 
-#define DRBD_AL_STRIPES_MIN     1
-#define DRBD_AL_STRIPES_MAX     1024
-#define DRBD_AL_STRIPES_DEF     1
+#define DRBD_AL_STRIPES_MIN     1U
+#define DRBD_AL_STRIPES_MAX     1024U
+#define DRBD_AL_STRIPES_DEF     1U
 #define DRBD_AL_STRIPES_SCALE   '1'
 
-#define DRBD_AL_STRIPE_SIZE_MIN   4
-#define DRBD_AL_STRIPE_SIZE_MAX   16777216
-#define DRBD_AL_STRIPE_SIZE_DEF   32
+#define DRBD_AL_STRIPE_SIZE_MIN   4U
+#define DRBD_AL_STRIPE_SIZE_MAX   16777216U
+#define DRBD_AL_STRIPE_SIZE_DEF   32U
 #define DRBD_AL_STRIPE_SIZE_SCALE 'k' /* kilobytes */
 
-#define DRBD_SOCKET_CHECK_TIMEO_MIN 0
+#define DRBD_SOCKET_CHECK_TIMEO_MIN 0U
 #define DRBD_SOCKET_CHECK_TIMEO_MAX DRBD_PING_TIMEO_MAX
-#define DRBD_SOCKET_CHECK_TIMEO_DEF 0
+#define DRBD_SOCKET_CHECK_TIMEO_DEF 0U
 #define DRBD_SOCKET_CHECK_TIMEO_SCALE '1'
 
-#define DRBD_RS_DISCARD_GRANULARITY_MIN 0
-#define DRBD_RS_DISCARD_GRANULARITY_MAX (1<<20)  /* 1MiByte */
-#define DRBD_RS_DISCARD_GRANULARITY_DEF 0     /* disabled by default */
+#define DRBD_RS_DISCARD_GRANULARITY_MIN 0U
+#define DRBD_RS_DISCARD_GRANULARITY_MAX (1U<<20)  /* 1MiByte */
+#define DRBD_RS_DISCARD_GRANULARITY_DEF 0U     /* disabled by default */
 #define DRBD_RS_DISCARD_GRANULARITY_SCALE '1' /* bytes */
 
 #endif
-- 
2.38.1

[PATCH 4/8] drbd: remove unnecessary assignment in vli_encode_bits

[Christoph Böhmwalder]

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 drivers/block/drbd/drbd_vli.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/drbd/drbd_vli.h b/drivers/block/drbd/drbd_vli.h
index 1ee81e3c2152..941c511cc4da 100644
--- a/drivers/block/drbd/drbd_vli.h
+++ b/drivers/block/drbd/drbd_vli.h
@@ -327,7 +327,7 @@ static inline int bitstream_get_bits(struct bitstream *bs, u64 *out, int bits)
  */
 static inline int vli_encode_bits(struct bitstream *bs, u64 in)
 {
-	u64 code = code;
+	u64 code;
 	int bits = __vli_encode_bits(&code, in);
 
 	if (bits <= 0)
-- 
2.38.1

[PATCH 5/8] drbd: remove macros using require_context

[Christoph Böhmwalder]

This require_context attribute originated in a proposed sparse patch by
Philipp Reisner back in 2008. Johannes Berg had a different solution to
a similar problem, and that patch "won" in the end; so the require_context
thing never got merged. The whole history can be read at [0].

DRBD kept using these annotations anyway for a while. Nowadays, on a
modern unmodified sparse, they obviously do nothing, and they are hardly
used anymore anyway.

So, just remove the definitions of these macros.

[0] https://www.spinics.net/lists/linux-sparse/msg01150.html

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 drivers/block/drbd/drbd_int.h | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index ae713338aa46..edce1f7ac2da 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -39,16 +39,6 @@
 #include "drbd_protocol.h"
 #include "drbd_polymorph_printk.h"
 
-#ifdef __CHECKER__
-# define __protected_by(x)       __attribute__((require_context(x,1,999,"rdwr")))
-# define __protected_read_by(x)  __attribute__((require_context(x,1,999,"read")))
-# define __protected_write_by(x) __attribute__((require_context(x,1,999,"write")))
-#else
-# define __protected_by(x)
-# define __protected_read_by(x)
-# define __protected_write_by(x)
-#endif
-
 /* shared module parameters, defined in drbd_main.c */
 #ifdef CONFIG_DRBD_FAULT_INJECTION
 extern int drbd_enable_faults;
@@ -774,7 +764,7 @@ struct drbd_device {
 	unsigned long flags;
 
 	/* configured by drbdsetup */
-	struct drbd_backing_dev *ldev __protected_by(local);
+	struct drbd_backing_dev *ldev;
 
 	sector_t p_size;     /* partner's disk size */
 	struct request_queue *rq_queue;
-- 
2.38.1

[PATCH 6/8] MAINTAINERS: add drbd headers

[Christoph Böhmwalder]

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 595d59eec7ea..83b6f3a97cf6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6349,6 +6349,7 @@ T:	git git://git.linbit.com/linux-drbd.git
 T:	git git://git.linbit.com/drbd-8.4.git
 F:	Documentation/admin-guide/blockdev/
 F:	drivers/block/drbd/
+F:	include/linux/drbd*
 F:	lib/lru_cache.c
 
 DRIVER COMPONENT FRAMEWORK
-- 
2.38.1

[PATCH 7/8] drbd: interval tree: make removing an "empty" interval a no-op

[Christoph Böhmwalder]

From: Lars Ellenberg <lars.ellenberg@linbit.com>

Trying to remove an "empty" (just initialized, or "cleared") interval
from the tree, this results in an endless loop.

As we typically protect the tree with a spinlock_irq,
the result is a hung system.

Be nice to error cleanup code paths, ignore removal of empty intervals.

Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
---
 drivers/block/drbd/drbd_interval.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/block/drbd/drbd_interval.c b/drivers/block/drbd/drbd_interval.c
index 5024ffd6143d..b6aaf0d4d85b 100644
--- a/drivers/block/drbd/drbd_interval.c
+++ b/drivers/block/drbd/drbd_interval.c
@@ -95,6 +95,10 @@ drbd_contains_interval(struct rb_root *root, sector_t sector,
 void
 drbd_remove_interval(struct rb_root *root, struct drbd_interval *this)
 {
+	/* avoid endless loop */
+	if (drbd_interval_empty(this))
+		return;
+
 	rb_erase_augmented(&this->rb, root, &augment_callbacks);
 }
 
-- 
2.38.1

[PATCH 8/8] drbd: drbd_insert_interval(): Clarify comment

[Christoph Böhmwalder]

From: Andreas Gruenbacher <agruen@linbit.com>

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
---
 drivers/block/drbd/drbd_interval.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/drbd/drbd_interval.c b/drivers/block/drbd/drbd_interval.c
index b6aaf0d4d85b..873beda6de24 100644
--- a/drivers/block/drbd/drbd_interval.c
+++ b/drivers/block/drbd/drbd_interval.c
@@ -58,7 +58,7 @@ drbd_insert_interval(struct rb_root *root, struct drbd_interval *this)
  * drbd_contains_interval  -  check if a tree contains a given interval
  * @root:	red black tree root
  * @sector:	start sector of @interval
- * @interval:	may not be a valid pointer
+ * @interval:	may be an invalid pointer
  *
  * Returns if the tree contains the node @interval with start sector @start.
  * Does not dereference @interval until @interval is known to be a valid object
-- 
2.38.1

[PATCH 6/8] MAINTAINERS: add drbd headers

[Christoph Böhmwalder]

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Joel Colledge <joel.colledge@linbit.com>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 595d59eec7ea..83b6f3a97cf6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6349,6 +6349,7 @@ T:	git git://git.linbit.com/linux-drbd.git
 T:	git git://git.linbit.com/drbd-8.4.git
 F:	Documentation/admin-guide/blockdev/
 F:	drivers/block/drbd/
+F:	include/linux/drbd*
 F:	lib/lru_cache.c
 
 DRIVER COMPONENT FRAMEWORK
-- 
2.38.1