linux-next.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* linux-next: manual merge of the block tree
@ 2008-11-19  3:21 Stephen Rothwell
  2008-11-19  9:14 ` Jens Axboe
  0 siblings, 1 reply; 34+ messages in thread
From: Stephen Rothwell @ 2008-11-19  3:21 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Zhaolei, Fernando Luis Vázquez Cao

[-- Attachment #1: Type: text/plain, Size: 592 bytes --]

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
drivers/block/xen-blkfront.c between commit
68aee07f9bad2c830a898cf6d6bfc11ea24efc40 ("Release old elevator on change
elevator") from Linus' tree and commit
f7ed11048c85660828fa2017ea2e3da27235f76a ("xen-blkfront: set queue
paravirt flag") from the block tree.

I used the version from the block tree and will carry this fix for a
while but assume that you will fix the conflict in the block tree soon.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: Tree for Oct 25
@ 2013-10-25 15:03 Thierry Reding
  2013-10-25 15:03 ` linux-next: manual merge of the block tree Thierry Reding
  0 siblings, 1 reply; 34+ messages in thread
From: Thierry Reding @ 2013-10-25 15:03 UTC (permalink / raw)
  To: linux-next, linux-kernel; +Cc: Mark Brown

Hi all,

I've uploaded today's linux-next tree to the master branch of the
repository below:

        git://gitorious.org/thierryreding/linux-next.git

A next-20131025 tag is also provided for convenience.

One new trivial conflicts and a new build failure caused by an incorrect
use of the genpool allocator.

Upon a request from Olof Johansson I've only included fixes for build
breakage as a result of interactions between the various trees. But
since I've fixed many of the other build failures already, I've pushed
those to a separate tag (next-20131025-fixes). That builds fine on x86
32-bit and 64-bit allmodconfigs as well as ARM and x86 default
configurations. Most of the PowerPC build errors have also been fixed.

Thierry

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: Tree for Oct 14
@ 2013-10-14 14:48 Thierry Reding
  2013-10-14 14:48 ` linux-next: manual merge of the block tree Thierry Reding
  0 siblings, 1 reply; 34+ messages in thread
From: Thierry Reding @ 2013-10-14 14:48 UTC (permalink / raw)
  To: linux-next, linux-kernel; +Cc: Mark Brown

Hi all,

I've uploaded today's linux-next tree to the master branch of the
repository below:

        git://gitorious.org/thierryreding/linux-next.git

A next-20131014 tag is also provided for convenience.

Gained a few conflicts, but nothing too exciting. x86 and ARM default
configurations build fine. There were some build failures unrelated to
the merge, most of which I fixed and added as patches on top of the
final merge.

Thierry

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2013-10-11 19:04 Mark Brown
  0 siblings, 0 replies; 34+ messages in thread
From: Mark Brown @ 2013-10-11 19:04 UTC (permalink / raw)
  To: Jens Axboe, Kent Overstreet; +Cc: linux-next, linux-kernel, Thierry Reding

[-- Attachment #1: Type: text/plain, Size: 3306 bytes --]

Today's linux-next merge of the block tree got additional conflicts due to
interaction between dd879364 (bcache: Break up struct search) and
c0f04d88 (bcache: Fix flushes in writeback mode) in Linus' tree.

I fixed it up (see below) and can carry as required. Please check if the
resolution looks correct.

diff --cc drivers/md/bcache/request.c
index b6a74bc,231b108..0000000
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@@ -979,67 -1059,52 +1059,53 @@@ static void cached_dev_write(struct cac
  
  	if (should_writeback(dc, s->orig_bio,
  			     cache_mode(dc, bio),
- 			     s->op.skip)) {
- 		s->op.skip = false;
- 		s->writeback = true;
+ 			     s->iop.bypass)) {
+ 		s->iop.bypass = false;
+ 		s->iop.writeback = true;
  	}
  
- 	if (s->op.skip)
- 		goto skip;
- 
- 	trace_bcache_write(s->orig_bio, s->writeback, s->op.skip);
+ 	if (s->iop.bypass) {
+ 		s->iop.bio = s->orig_bio;
+ 		bio_get(s->iop.bio);
  
- 	if (!s->writeback) {
- 		s->op.cache_bio = bio_clone_bioset(bio, GFP_NOIO,
- 						   dc->disk.bio_split);
- 
- 		closure_bio_submit(bio, cl, s->d);
- 	} else {
+ 		if (!(bio->bi_rw & REQ_DISCARD) ||
+ 		    blk_queue_discard(bdev_get_queue(dc->bdev)))
+ 			closure_bio_submit(bio, cl, s->d);
+ 	} else if (s->iop.writeback) {
  		bch_writeback_add(dc);
- 		s->op.cache_bio = bio;
  
 -		if (s->iop.flush_journal) {
 +		if (bio->bi_rw & REQ_FLUSH) {
  			/* Also need to send a flush to the backing device */
 -			s->iop.bio = bio_clone_bioset(bio, GFP_NOIO,
 -						      dc->disk.bio_split);
 +			struct bio *flush = bio_alloc_bioset(0, GFP_NOIO,
 +							     dc->disk.bio_split);
  
 -			bio->bi_size = 0;
 -			bio->bi_vcnt = 0;
 -			closure_bio_submit(bio, cl, s->d);
 -		} else {
 -			s->iop.bio = bio;
 +			flush->bi_rw	= WRITE_FLUSH;
 +			flush->bi_bdev	= bio->bi_bdev;
 +			flush->bi_end_io = request_endio;
 +			flush->bi_private = cl;
 +
 +			closure_bio_submit(flush, cl, s->d);
  		}
- 	}
- out:
- 	closure_call(&s->op.cl, bch_insert_data, NULL, cl);
- 	continue_at(cl, cached_dev_write_complete, NULL);
- skip:
- 	s->op.skip = true;
- 	s->op.cache_bio = s->orig_bio;
- 	bio_get(s->op.cache_bio);
+ 	} else {
+ 		s->iop.bio = bio_clone_bioset(bio, GFP_NOIO,
+ 					      dc->disk.bio_split);
  
- 	if ((bio->bi_rw & REQ_DISCARD) &&
- 	    !blk_queue_discard(bdev_get_queue(dc->bdev)))
- 		goto out;
+ 		closure_bio_submit(bio, cl, s->d);
+ 	}
  
- 	closure_bio_submit(bio, cl, s->d);
- 	goto out;
+ 	closure_call(&s->iop.cl, bch_data_insert, NULL, cl);
+ 	continue_at(cl, cached_dev_write_complete, NULL);
  }
  
- static void request_nodata(struct cached_dev *dc, struct search *s)
+ static void cached_dev_nodata(struct closure *cl)
  {
- 	struct closure *cl = &s->cl;
+ 	struct search *s = container_of(cl, struct search, cl);
  	struct bio *bio = &s->bio.bio;
  
- 	if (bio->bi_rw & REQ_DISCARD) {
- 		request_write(dc, s);
- 		return;
- 	}
- 
- 	if (s->op.flush_journal)
- 		bch_journal_meta(s->op.c, cl);
+ 	if (s->iop.flush_journal)
+ 		bch_journal_meta(s->iop.c, cl);
  
+ 	/* If it's a flush, we send the flush to the backing device too */
  	closure_bio_submit(bio, cl, s->d);
  
  	continue_at(cl, cached_dev_bio_complete, NULL);

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: Tree for Oct 1
@ 2013-10-01 11:03 Thierry Reding
  2013-10-01 11:07 ` linux-next: manual merge of the block tree Thierry Reding
  0 siblings, 1 reply; 34+ messages in thread
From: Thierry Reding @ 2013-10-01 11:03 UTC (permalink / raw)
  To: linux-next, linux-kernel; +Cc: Mark Brown

[-- Attachment #1: Type: text/plain, Size: 986 bytes --]

Hi all,

I've uploaded today's linux-next tree to the master branch of the
repository below:

	git://gitorious.org/thierryreding/linux-next.git

A next-20131001 tag is also provided for convenience.

The situation is pretty much the same as yesterday. Some conflicts went
away, but most remained. i386 and x86_64 default configuration builds
show no breakage and ARM default configurations are still being built.
Yesterday's run didn't show any merge-related breakage. I found a single
build issue for i.MX which was trivial to fix and sent out a patch.

I received a response from a few people to the conflict notifications,
so I won't be sending those out again. For those that I haven't received
any replies and for new conflicts, new notifications will be sent
shortly.

It looks as if I will be able to do another linux-next tree tomorrow,
but not on Thursday and Friday, so Mark Brown will be doing those. If
anyone else is interested in helping out you're very welcome.

Thierry

[-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --]

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the bcon tree
@ 2013-09-30 11:26 Thierry Reding
  2013-09-30 11:26 ` linux-next: manual merge of the block tree Thierry Reding
  0 siblings, 1 reply; 34+ messages in thread
From: Thierry Reding @ 2013-09-30 11:26 UTC (permalink / raw)
  To: Joern Engel; +Cc: linux-next, linux-kernel

Today's linux-next merge of the bcon tree got conflicts in

	drivers/block/Kconfig
	kernel/printk.c

I fixed it up (see below). Please check if the resolution looks correct.

Thanks,
Thierry
---
diff --cc drivers/block/Kconfig
index 555aed0,06eb42f..4cd9323
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@@ -541,14 -544,10 +541,20 @@@ config BLK_DEV_RB
  
  	  If unsure, say N.
  
 +config BLK_DEV_RSXX
 +	tristate "IBM Flash Adapter 900GB Full Height PCIe Device Driver"
 +	depends on PCI
 +	help
 +	  Device driver for IBM's high speed PCIe SSD
 +	  storage device: Flash Adapter 900GB Full Height.
 +
 +	  To compile this driver as a module, choose M here: the
 +	  module will be called rsxx.
 +
+ config BLOCKCONSOLE
+ 	bool "Block device console logging support"
+ 	help
+ 	  This enables logging to block devices.
+ 	  See <file:Documentation/block/blockconsole.txt> for details.
+ 
  endif # BLK_DEV
diff --cc drivers/block/Makefile
index f33b366,99c5c2e..08da80f
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@@ -40,9 -40,6 +40,10 @@@ obj-$(CONFIG_XEN_BLKDEV_BACKEND)	+= xen
  obj-$(CONFIG_BLK_DEV_DRBD)     += drbd/
  obj-$(CONFIG_BLK_DEV_RBD)     += rbd.o
  obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX)	+= mtip32xx/
+ obj-$(CONFIG_BLOCKCONSOLE)	+= blockconsole.o
  
 +obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
 +
 +nvme-y		:= nvme-core.o nvme-scsi.o
 +skd-y		:= skd_main.o
  swim_mod-y	:= swim.o swim_asm.o
diff --cc kernel/printk/printk.c
index b4e8500,0000000..1cba1ea
mode 100644,000000..100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@@ -1,2910 -1,0 +1,2911 @@@
 +/*
 + *  linux/kernel/printk.c
 + *
 + *  Copyright (C) 1991, 1992  Linus Torvalds
 + *
 + * Modified to make sys_syslog() more flexible: added commands to
 + * return the last 4k of kernel messages, regardless of whether
 + * they've been read or not.  Added option to suppress kernel printk's
 + * to the console.  Added hook for sending the console messages
 + * elsewhere, in preparation for a serial line console (someday).
 + * Ted Ts'o, 2/11/93.
 + * Modified for sysctl support, 1/8/97, Chris Horn.
 + * Fixed SMP synchronization, 08/08/99, Manfred Spraul
 + *     manfred@colorfullife.com
 + * Rewrote bits to get rid of console_lock
 + *	01Mar01 Andrew Morton
 + */
 +
 +#include <linux/kernel.h>
 +#include <linux/mm.h>
 +#include <linux/tty.h>
 +#include <linux/tty_driver.h>
 +#include <linux/console.h>
 +#include <linux/init.h>
 +#include <linux/jiffies.h>
 +#include <linux/nmi.h>
 +#include <linux/module.h>
 +#include <linux/moduleparam.h>
 +#include <linux/interrupt.h>			/* For in_interrupt() */
 +#include <linux/delay.h>
 +#include <linux/smp.h>
 +#include <linux/security.h>
 +#include <linux/bootmem.h>
 +#include <linux/memblock.h>
 +#include <linux/aio.h>
 +#include <linux/syscalls.h>
 +#include <linux/kexec.h>
 +#include <linux/kdb.h>
 +#include <linux/ratelimit.h>
 +#include <linux/kmsg_dump.h>
 +#include <linux/syslog.h>
 +#include <linux/cpu.h>
 +#include <linux/notifier.h>
 +#include <linux/rculist.h>
 +#include <linux/poll.h>
 +#include <linux/irq_work.h>
 +#include <linux/utsname.h>
 +
 +#include <asm/uaccess.h>
 +
 +#define CREATE_TRACE_POINTS
 +#include <trace/events/printk.h>
 +
 +#include "console_cmdline.h"
 +#include "braille.h"
 +
 +/* printk's without a loglevel use this.. */
 +#define DEFAULT_MESSAGE_LOGLEVEL CONFIG_DEFAULT_MESSAGE_LOGLEVEL
 +
 +/* We show everything that is MORE important than this.. */
 +#define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */
 +#define DEFAULT_CONSOLE_LOGLEVEL 7 /* anything MORE serious than KERN_DEBUG */
 +
 +int console_printk[4] = {
 +	DEFAULT_CONSOLE_LOGLEVEL,	/* console_loglevel */
 +	DEFAULT_MESSAGE_LOGLEVEL,	/* default_message_loglevel */
 +	MINIMUM_CONSOLE_LOGLEVEL,	/* minimum_console_loglevel */
 +	DEFAULT_CONSOLE_LOGLEVEL,	/* default_console_loglevel */
 +};
 +
 +/*
 + * Low level drivers may need that to know if they can schedule in
 + * their unblank() callback or not. So let's export it.
 + */
 +int oops_in_progress;
 +EXPORT_SYMBOL(oops_in_progress);
 +
 +/*
 + * console_sem protects the console_drivers list, and also
 + * provides serialisation for access to the entire console
 + * driver system.
 + */
 +static DEFINE_SEMAPHORE(console_sem);
 +struct console *console_drivers;
 +EXPORT_SYMBOL_GPL(console_drivers);
 +
 +#ifdef CONFIG_LOCKDEP
 +static struct lockdep_map console_lock_dep_map = {
 +	.name = "console_lock"
 +};
 +#endif
 +
 +/*
 + * This is used for debugging the mess that is the VT code by
 + * keeping track if we have the console semaphore held. It's
 + * definitely not the perfect debug tool (we don't know if _WE_
 + * hold it are racing, but it helps tracking those weird code
 + * path in the console code where we end up in places I want
 + * locked without the console sempahore held
 + */
 +static int console_locked, console_suspended;
 +
 +/*
 + * If exclusive_console is non-NULL then only this console is to be printed to.
 + */
 +static struct console *exclusive_console;
 +
 +/*
 + *	Array of consoles built from command line options (console=)
 + */
 +
 +#define MAX_CMDLINECONSOLES 8
 +
 +static struct console_cmdline console_cmdline[MAX_CMDLINECONSOLES];
 +
 +static int selected_console = -1;
 +static int preferred_console = -1;
 +int console_set_on_cmdline;
 +EXPORT_SYMBOL(console_set_on_cmdline);
 +
 +/* Flag: console code may call schedule() */
 +static int console_may_schedule;
 +
 +/*
 + * The printk log buffer consists of a chain of concatenated variable
 + * length records. Every record starts with a record header, containing
 + * the overall length of the record.
 + *
 + * The heads to the first and last entry in the buffer, as well as the
 + * sequence numbers of these both entries are maintained when messages
 + * are stored..
 + *
 + * If the heads indicate available messages, the length in the header
 + * tells the start next message. A length == 0 for the next message
 + * indicates a wrap-around to the beginning of the buffer.
 + *
 + * Every record carries the monotonic timestamp in microseconds, as well as
 + * the standard userspace syslog level and syslog facility. The usual
 + * kernel messages use LOG_KERN; userspace-injected messages always carry
 + * a matching syslog facility, by default LOG_USER. The origin of every
 + * message can be reliably determined that way.
 + *
 + * The human readable log message directly follows the message header. The
 + * length of the message text is stored in the header, the stored message
 + * is not terminated.
 + *
 + * Optionally, a message can carry a dictionary of properties (key/value pairs),
 + * to provide userspace with a machine-readable message context.
 + *
 + * Examples for well-defined, commonly used property names are:
 + *   DEVICE=b12:8               device identifier
 + *                                b12:8         block dev_t
 + *                                c127:3        char dev_t
 + *                                n8            netdev ifindex
 + *                                +sound:card0  subsystem:devname
 + *   SUBSYSTEM=pci              driver-core subsystem name
 + *
 + * Valid characters in property names are [a-zA-Z0-9.-_]. The plain text value
 + * follows directly after a '=' character. Every property is terminated by
 + * a '\0' character. The last property is not terminated.
 + *
 + * Example of a message structure:
 + *   0000  ff 8f 00 00 00 00 00 00      monotonic time in nsec
 + *   0008  34 00                        record is 52 bytes long
 + *   000a        0b 00                  text is 11 bytes long
 + *   000c              1f 00            dictionary is 23 bytes long
 + *   000e                    03 00      LOG_KERN (facility) LOG_ERR (level)
 + *   0010  69 74 27 73 20 61 20 6c      "it's a l"
 + *         69 6e 65                     "ine"
 + *   001b           44 45 56 49 43      "DEVIC"
 + *         45 3d 62 38 3a 32 00 44      "E=b8:2\0D"
 + *         52 49 56 45 52 3d 62 75      "RIVER=bu"
 + *         67                           "g"
 + *   0032     00 00 00                  padding to next message header
 + *
 + * The 'struct printk_log' buffer header must never be directly exported to
 + * userspace, it is a kernel-private implementation detail that might
 + * need to be changed in the future, when the requirements change.
 + *
 + * /dev/kmsg exports the structured data in the following line format:
 + *   "level,sequnum,timestamp;<message text>\n"
 + *
 + * The optional key/value pairs are attached as continuation lines starting
 + * with a space character and terminated by a newline. All possible
 + * non-prinatable characters are escaped in the "\xff" notation.
 + *
 + * Users of the export format should ignore possible additional values
 + * separated by ',', and find the message after the ';' character.
 + */
 +
 +enum log_flags {
 +	LOG_NOCONS	= 1,	/* already flushed, do not print to console */
 +	LOG_NEWLINE	= 2,	/* text ended with a newline */
 +	LOG_PREFIX	= 4,	/* text started with a prefix */
 +	LOG_CONT	= 8,	/* text is a fragment of a continuation line */
 +};
 +
 +struct printk_log {
 +	u64 ts_nsec;		/* timestamp in nanoseconds */
 +	u16 len;		/* length of entire record */
 +	u16 text_len;		/* length of text buffer */
 +	u16 dict_len;		/* length of dictionary buffer */
 +	u8 facility;		/* syslog facility */
 +	u8 flags:5;		/* internal record flags */
 +	u8 level:3;		/* syslog level */
 +};
 +
 +/*
 + * The logbuf_lock protects kmsg buffer, indices, counters. It is also
 + * used in interesting ways to provide interlocking in console_unlock();
 + */
 +static DEFINE_RAW_SPINLOCK(logbuf_lock);
 +
 +#ifdef CONFIG_PRINTK
 +DECLARE_WAIT_QUEUE_HEAD(log_wait);
 +/* the next printk record to read by syslog(READ) or /proc/kmsg */
 +static u64 syslog_seq;
 +static u32 syslog_idx;
 +static enum log_flags syslog_prev;
 +static size_t syslog_partial;
 +
 +/* index and sequence number of the first record stored in the buffer */
 +static u64 log_first_seq;
 +static u32 log_first_idx;
 +
 +/* index and sequence number of the next record to store in the buffer */
 +static u64 log_next_seq;
 +static u32 log_next_idx;
 +
 +/* the next printk record to write to the console */
 +static u64 console_seq;
 +static u32 console_idx;
 +static enum log_flags console_prev;
 +
 +/* the next printk record to read after the last 'clear' command */
 +static u64 clear_seq;
 +static u32 clear_idx;
 +
 +#define PREFIX_MAX		32
 +#define LOG_LINE_MAX		1024 - PREFIX_MAX
 +
 +/* record buffer */
 +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
 +#define LOG_ALIGN 4
 +#else
 +#define LOG_ALIGN __alignof__(struct printk_log)
 +#endif
 +#define __LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT)
 +static char __log_buf[__LOG_BUF_LEN] __aligned(LOG_ALIGN);
 +static char *log_buf = __log_buf;
 +static u32 log_buf_len = __LOG_BUF_LEN;
 +
 +/* cpu currently holding logbuf_lock */
 +static volatile unsigned int logbuf_cpu = UINT_MAX;
 +
 +/* human readable text of the record */
 +static char *log_text(const struct printk_log *msg)
 +{
 +	return (char *)msg + sizeof(struct printk_log);
 +}
 +
 +/* optional key/value pair dictionary attached to the record */
 +static char *log_dict(const struct printk_log *msg)
 +{
 +	return (char *)msg + sizeof(struct printk_log) + msg->text_len;
 +}
 +
 +/* get record by index; idx must point to valid msg */
 +static struct printk_log *log_from_idx(u32 idx)
 +{
 +	struct printk_log *msg = (struct printk_log *)(log_buf + idx);
 +
 +	/*
 +	 * A length == 0 record is the end of buffer marker. Wrap around and
 +	 * read the message at the start of the buffer.
 +	 */
 +	if (!msg->len)
 +		return (struct printk_log *)log_buf;
 +	return msg;
 +}
 +
 +/* get next record; idx must point to valid msg */
 +static u32 log_next(u32 idx)
 +{
 +	struct printk_log *msg = (struct printk_log *)(log_buf + idx);
 +
 +	/* length == 0 indicates the end of the buffer; wrap */
 +	/*
 +	 * A length == 0 record is the end of buffer marker. Wrap around and
 +	 * read the message at the start of the buffer as *this* one, and
 +	 * return the one after that.
 +	 */
 +	if (!msg->len) {
 +		msg = (struct printk_log *)log_buf;
 +		return msg->len;
 +	}
 +	return idx + msg->len;
 +}
 +
 +/* insert record into the buffer, discard old ones, update heads */
 +static void log_store(int facility, int level,
 +		      enum log_flags flags, u64 ts_nsec,
 +		      const char *dict, u16 dict_len,
 +		      const char *text, u16 text_len)
 +{
 +	struct printk_log *msg;
 +	u32 size, pad_len;
 +
 +	/* number of '\0' padding bytes to next message */
 +	size = sizeof(struct printk_log) + text_len + dict_len;
 +	pad_len = (-size) & (LOG_ALIGN - 1);
 +	size += pad_len;
 +
 +	while (log_first_seq < log_next_seq) {
 +		u32 free;
 +
 +		if (log_next_idx > log_first_idx)
 +			free = max(log_buf_len - log_next_idx, log_first_idx);
 +		else
 +			free = log_first_idx - log_next_idx;
 +
 +		if (free > size + sizeof(struct printk_log))
 +			break;
 +
 +		/* drop old messages until we have enough contiuous space */
 +		log_first_idx = log_next(log_first_idx);
 +		log_first_seq++;
 +	}
 +
 +	if (log_next_idx + size + sizeof(struct printk_log) >= log_buf_len) {
 +		/*
 +		 * This message + an additional empty header does not fit
 +		 * at the end of the buffer. Add an empty header with len == 0
 +		 * to signify a wrap around.
 +		 */
 +		memset(log_buf + log_next_idx, 0, sizeof(struct printk_log));
 +		log_next_idx = 0;
 +	}
 +
 +	/* fill message */
 +	msg = (struct printk_log *)(log_buf + log_next_idx);
 +	memcpy(log_text(msg), text, text_len);
 +	msg->text_len = text_len;
 +	memcpy(log_dict(msg), dict, dict_len);
 +	msg->dict_len = dict_len;
 +	msg->facility = facility;
 +	msg->level = level & 7;
 +	msg->flags = flags & 0x1f;
 +	if (ts_nsec > 0)
 +		msg->ts_nsec = ts_nsec;
 +	else
 +		msg->ts_nsec = local_clock();
 +	memset(log_dict(msg) + dict_len, 0, pad_len);
 +	msg->len = sizeof(struct printk_log) + text_len + dict_len + pad_len;
 +
 +	/* insert message */
 +	log_next_idx += msg->len;
 +	log_next_seq++;
 +}
 +
 +#ifdef CONFIG_SECURITY_DMESG_RESTRICT
 +int dmesg_restrict = 1;
 +#else
 +int dmesg_restrict;
 +#endif
 +
 +static int syslog_action_restricted(int type)
 +{
 +	if (dmesg_restrict)
 +		return 1;
 +	/*
 +	 * Unless restricted, we allow "read all" and "get buffer size"
 +	 * for everybody.
 +	 */
 +	return type != SYSLOG_ACTION_READ_ALL &&
 +	       type != SYSLOG_ACTION_SIZE_BUFFER;
 +}
 +
 +static int check_syslog_permissions(int type, bool from_file)
 +{
 +	/*
 +	 * If this is from /proc/kmsg and we've already opened it, then we've
 +	 * already done the capabilities checks at open time.
 +	 */
 +	if (from_file && type != SYSLOG_ACTION_OPEN)
 +		return 0;
 +
 +	if (syslog_action_restricted(type)) {
 +		if (capable(CAP_SYSLOG))
 +			return 0;
 +		/*
 +		 * For historical reasons, accept CAP_SYS_ADMIN too, with
 +		 * a warning.
 +		 */
 +		if (capable(CAP_SYS_ADMIN)) {
 +			pr_warn_once("%s (%d): Attempt to access syslog with "
 +				     "CAP_SYS_ADMIN but no CAP_SYSLOG "
 +				     "(deprecated).\n",
 +				 current->comm, task_pid_nr(current));
 +			return 0;
 +		}
 +		return -EPERM;
 +	}
 +	return security_syslog(type);
 +}
 +
 +
 +/* /dev/kmsg - userspace message inject/listen interface */
 +struct devkmsg_user {
 +	u64 seq;
 +	u32 idx;
 +	enum log_flags prev;
 +	struct mutex lock;
 +	char buf[8192];
 +};
 +
 +static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
 +			      unsigned long count, loff_t pos)
 +{
 +	char *buf, *line;
 +	int i;
 +	int level = default_message_loglevel;
 +	int facility = 1;	/* LOG_USER */
 +	size_t len = iov_length(iv, count);
 +	ssize_t ret = len;
 +
 +	if (len > LOG_LINE_MAX)
 +		return -EINVAL;
 +	buf = kmalloc(len+1, GFP_KERNEL);
 +	if (buf == NULL)
 +		return -ENOMEM;
 +
 +	line = buf;
 +	for (i = 0; i < count; i++) {
 +		if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) {
 +			ret = -EFAULT;
 +			goto out;
 +		}
 +		line += iv[i].iov_len;
 +	}
 +
 +	/*
 +	 * Extract and skip the syslog prefix <[0-9]*>. Coming from userspace
 +	 * the decimal value represents 32bit, the lower 3 bit are the log
 +	 * level, the rest are the log facility.
 +	 *
 +	 * If no prefix or no userspace facility is specified, we
 +	 * enforce LOG_USER, to be able to reliably distinguish
 +	 * kernel-generated messages from userspace-injected ones.
 +	 */
 +	line = buf;
 +	if (line[0] == '<') {
 +		char *endp = NULL;
 +
 +		i = simple_strtoul(line+1, &endp, 10);
 +		if (endp && endp[0] == '>') {
 +			level = i & 7;
 +			if (i >> 3)
 +				facility = i >> 3;
 +			endp++;
 +			len -= endp - line;
 +			line = endp;
 +		}
 +	}
 +	line[len] = '\0';
 +
 +	printk_emit(facility, level, NULL, 0, "%s", line);
 +out:
 +	kfree(buf);
 +	return ret;
 +}
 +
 +static ssize_t devkmsg_read(struct file *file, char __user *buf,
 +			    size_t count, loff_t *ppos)
 +{
 +	struct devkmsg_user *user = file->private_data;
 +	struct printk_log *msg;
 +	u64 ts_usec;
 +	size_t i;
 +	char cont = '-';
 +	size_t len;
 +	ssize_t ret;
 +
 +	if (!user)
 +		return -EBADF;
 +
 +	ret = mutex_lock_interruptible(&user->lock);
 +	if (ret)
 +		return ret;
 +	raw_spin_lock_irq(&logbuf_lock);
 +	while (user->seq == log_next_seq) {
 +		if (file->f_flags & O_NONBLOCK) {
 +			ret = -EAGAIN;
 +			raw_spin_unlock_irq(&logbuf_lock);
 +			goto out;
 +		}
 +
 +		raw_spin_unlock_irq(&logbuf_lock);
 +		ret = wait_event_interruptible(log_wait,
 +					       user->seq != log_next_seq);
 +		if (ret)
 +			goto out;
 +		raw_spin_lock_irq(&logbuf_lock);
 +	}
 +
 +	if (user->seq < log_first_seq) {
 +		/* our last seen message is gone, return error and reset */
 +		user->idx = log_first_idx;
 +		user->seq = log_first_seq;
 +		ret = -EPIPE;
 +		raw_spin_unlock_irq(&logbuf_lock);
 +		goto out;
 +	}
 +
 +	msg = log_from_idx(user->idx);
 +	ts_usec = msg->ts_nsec;
 +	do_div(ts_usec, 1000);
 +
 +	/*
 +	 * If we couldn't merge continuation line fragments during the print,
 +	 * export the stored flags to allow an optional external merge of the
 +	 * records. Merging the records isn't always neccessarily correct, like
 +	 * when we hit a race during printing. In most cases though, it produces
 +	 * better readable output. 'c' in the record flags mark the first
 +	 * fragment of a line, '+' the following.
 +	 */
 +	if (msg->flags & LOG_CONT && !(user->prev & LOG_CONT))
 +		cont = 'c';
 +	else if ((msg->flags & LOG_CONT) ||
 +		 ((user->prev & LOG_CONT) && !(msg->flags & LOG_PREFIX)))
 +		cont = '+';
 +
 +	len = sprintf(user->buf, "%u,%llu,%llu,%c;",
 +		      (msg->facility << 3) | msg->level,
 +		      user->seq, ts_usec, cont);
 +	user->prev = msg->flags;
 +
 +	/* escape non-printable characters */
 +	for (i = 0; i < msg->text_len; i++) {
 +		unsigned char c = log_text(msg)[i];
 +
 +		if (c < ' ' || c >= 127 || c == '\\')
 +			len += sprintf(user->buf + len, "\\x%02x", c);
 +		else
 +			user->buf[len++] = c;
 +	}
 +	user->buf[len++] = '\n';
 +
 +	if (msg->dict_len) {
 +		bool line = true;
 +
 +		for (i = 0; i < msg->dict_len; i++) {
 +			unsigned char c = log_dict(msg)[i];
 +
 +			if (line) {
 +				user->buf[len++] = ' ';
 +				line = false;
 +			}
 +
 +			if (c == '\0') {
 +				user->buf[len++] = '\n';
 +				line = true;
 +				continue;
 +			}
 +
 +			if (c < ' ' || c >= 127 || c == '\\') {
 +				len += sprintf(user->buf + len, "\\x%02x", c);
 +				continue;
 +			}
 +
 +			user->buf[len++] = c;
 +		}
 +		user->buf[len++] = '\n';
 +	}
 +
 +	user->idx = log_next(user->idx);
 +	user->seq++;
 +	raw_spin_unlock_irq(&logbuf_lock);
 +
 +	if (len > count) {
 +		ret = -EINVAL;
 +		goto out;
 +	}
 +
 +	if (copy_to_user(buf, user->buf, len)) {
 +		ret = -EFAULT;
 +		goto out;
 +	}
 +	ret = len;
 +out:
 +	mutex_unlock(&user->lock);
 +	return ret;
 +}
 +
 +static loff_t devkmsg_llseek(struct file *file, loff_t offset, int whence)
 +{
 +	struct devkmsg_user *user = file->private_data;
 +	loff_t ret = 0;
 +
 +	if (!user)
 +		return -EBADF;
 +	if (offset)
 +		return -ESPIPE;
 +
 +	raw_spin_lock_irq(&logbuf_lock);
 +	switch (whence) {
 +	case SEEK_SET:
 +		/* the first record */
 +		user->idx = log_first_idx;
 +		user->seq = log_first_seq;
 +		break;
 +	case SEEK_DATA:
 +		/*
 +		 * The first record after the last SYSLOG_ACTION_CLEAR,
 +		 * like issued by 'dmesg -c'. Reading /dev/kmsg itself
 +		 * changes no global state, and does not clear anything.
 +		 */
 +		user->idx = clear_idx;
 +		user->seq = clear_seq;
 +		break;
 +	case SEEK_END:
 +		/* after the last record */
 +		user->idx = log_next_idx;
 +		user->seq = log_next_seq;
 +		break;
 +	default:
 +		ret = -EINVAL;
 +	}
 +	raw_spin_unlock_irq(&logbuf_lock);
 +	return ret;
 +}
 +
 +static unsigned int devkmsg_poll(struct file *file, poll_table *wait)
 +{
 +	struct devkmsg_user *user = file->private_data;
 +	int ret = 0;
 +
 +	if (!user)
 +		return POLLERR|POLLNVAL;
 +
 +	poll_wait(file, &log_wait, wait);
 +
 +	raw_spin_lock_irq(&logbuf_lock);
 +	if (user->seq < log_next_seq) {
 +		/* return error when data has vanished underneath us */
 +		if (user->seq < log_first_seq)
 +			ret = POLLIN|POLLRDNORM|POLLERR|POLLPRI;
 +		else
 +			ret = POLLIN|POLLRDNORM;
 +	}
 +	raw_spin_unlock_irq(&logbuf_lock);
 +
 +	return ret;
 +}
 +
 +static int devkmsg_open(struct inode *inode, struct file *file)
 +{
 +	struct devkmsg_user *user;
 +	int err;
 +
 +	/* write-only does not need any file context */
 +	if ((file->f_flags & O_ACCMODE) == O_WRONLY)
 +		return 0;
 +
 +	err = check_syslog_permissions(SYSLOG_ACTION_READ_ALL,
 +				       SYSLOG_FROM_READER);
 +	if (err)
 +		return err;
 +
 +	user = kmalloc(sizeof(struct devkmsg_user), GFP_KERNEL);
 +	if (!user)
 +		return -ENOMEM;
 +
 +	mutex_init(&user->lock);
 +
 +	raw_spin_lock_irq(&logbuf_lock);
 +	user->idx = log_first_idx;
 +	user->seq = log_first_seq;
 +	raw_spin_unlock_irq(&logbuf_lock);
 +
 +	file->private_data = user;
 +	return 0;
 +}
 +
 +static int devkmsg_release(struct inode *inode, struct file *file)
 +{
 +	struct devkmsg_user *user = file->private_data;
 +
 +	if (!user)
 +		return 0;
 +
 +	mutex_destroy(&user->lock);
 +	kfree(user);
 +	return 0;
 +}
 +
 +const struct file_operations kmsg_fops = {
 +	.open = devkmsg_open,
 +	.read = devkmsg_read,
 +	.aio_write = devkmsg_writev,
 +	.llseek = devkmsg_llseek,
 +	.poll = devkmsg_poll,
 +	.release = devkmsg_release,
 +};
 +
 +#ifdef CONFIG_KEXEC
 +/*
 + * This appends the listed symbols to /proc/vmcoreinfo
 + *
 + * /proc/vmcoreinfo is used by various utiilties, like crash and makedumpfile to
 + * obtain access to symbols that are otherwise very difficult to locate.  These
 + * symbols are specifically used so that utilities can access and extract the
 + * dmesg log from a vmcore file after a crash.
 + */
 +void log_buf_kexec_setup(void)
 +{
 +	VMCOREINFO_SYMBOL(log_buf);
 +	VMCOREINFO_SYMBOL(log_buf_len);
 +	VMCOREINFO_SYMBOL(log_first_idx);
 +	VMCOREINFO_SYMBOL(log_next_idx);
 +	/*
 +	 * Export struct printk_log size and field offsets. User space tools can
 +	 * parse it and detect any changes to structure down the line.
 +	 */
 +	VMCOREINFO_STRUCT_SIZE(printk_log);
 +	VMCOREINFO_OFFSET(printk_log, ts_nsec);
 +	VMCOREINFO_OFFSET(printk_log, len);
 +	VMCOREINFO_OFFSET(printk_log, text_len);
 +	VMCOREINFO_OFFSET(printk_log, dict_len);
 +}
 +#endif
 +
 +/* requested log_buf_len from kernel cmdline */
 +static unsigned long __initdata new_log_buf_len;
 +
 +/* save requested log_buf_len since it's too early to process it */
 +static int __init log_buf_len_setup(char *str)
 +{
 +	unsigned size = memparse(str, &str);
 +
 +	if (size)
 +		size = roundup_pow_of_two(size);
 +	if (size > log_buf_len)
 +		new_log_buf_len = size;
 +
 +	return 0;
 +}
 +early_param("log_buf_len", log_buf_len_setup);
 +
 +void __init setup_log_buf(int early)
 +{
 +	unsigned long flags;
 +	char *new_log_buf;
 +	int free;
 +
 +	if (!new_log_buf_len)
 +		return;
 +
 +	if (early) {
 +		unsigned long mem;
 +
 +		mem = memblock_alloc(new_log_buf_len, PAGE_SIZE);
 +		if (!mem)
 +			return;
 +		new_log_buf = __va(mem);
 +	} else {
 +		new_log_buf = alloc_bootmem_nopanic(new_log_buf_len);
 +	}
 +
 +	if (unlikely(!new_log_buf)) {
 +		pr_err("log_buf_len: %ld bytes not available\n",
 +			new_log_buf_len);
 +		return;
 +	}
 +
 +	raw_spin_lock_irqsave(&logbuf_lock, flags);
 +	log_buf_len = new_log_buf_len;
 +	log_buf = new_log_buf;
 +	new_log_buf_len = 0;
 +	free = __LOG_BUF_LEN - log_next_idx;
 +	memcpy(log_buf, __log_buf, __LOG_BUF_LEN);
 +	raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +
 +	pr_info("log_buf_len: %d\n", log_buf_len);
 +	pr_info("early log buf free: %d(%d%%)\n",
 +		free, (free * 100) / __LOG_BUF_LEN);
 +}
 +
 +static bool __read_mostly ignore_loglevel;
 +
 +static int __init ignore_loglevel_setup(char *str)
 +{
 +	ignore_loglevel = 1;
 +	printk(KERN_INFO "debug: ignoring loglevel setting.\n");
 +
 +	return 0;
 +}
 +
 +early_param("ignore_loglevel", ignore_loglevel_setup);
 +module_param(ignore_loglevel, bool, S_IRUGO | S_IWUSR);
 +MODULE_PARM_DESC(ignore_loglevel, "ignore loglevel setting, to"
 +	"print all kernel messages to the console.");
 +
 +#ifdef CONFIG_BOOT_PRINTK_DELAY
 +
 +static int boot_delay; /* msecs delay after each printk during bootup */
 +static unsigned long long loops_per_msec;	/* based on boot_delay */
 +
 +static int __init boot_delay_setup(char *str)
 +{
 +	unsigned long lpj;
 +
 +	lpj = preset_lpj ? preset_lpj : 1000000;	/* some guess */
 +	loops_per_msec = (unsigned long long)lpj / 1000 * HZ;
 +
 +	get_option(&str, &boot_delay);
 +	if (boot_delay > 10 * 1000)
 +		boot_delay = 0;
 +
 +	pr_debug("boot_delay: %u, preset_lpj: %ld, lpj: %lu, "
 +		"HZ: %d, loops_per_msec: %llu\n",
 +		boot_delay, preset_lpj, lpj, HZ, loops_per_msec);
 +	return 1;
 +}
 +__setup("boot_delay=", boot_delay_setup);
 +
 +static void boot_delay_msec(int level)
 +{
 +	unsigned long long k;
 +	unsigned long timeout;
 +
 +	if ((boot_delay == 0 || system_state != SYSTEM_BOOTING)
 +		|| (level >= console_loglevel && !ignore_loglevel)) {
 +		return;
 +	}
 +
 +	k = (unsigned long long)loops_per_msec * boot_delay;
 +
 +	timeout = jiffies + msecs_to_jiffies(boot_delay);
 +	while (k) {
 +		k--;
 +		cpu_relax();
 +		/*
 +		 * use (volatile) jiffies to prevent
 +		 * compiler reduction; loop termination via jiffies
 +		 * is secondary and may or may not happen.
 +		 */
 +		if (time_after(jiffies, timeout))
 +			break;
 +		touch_nmi_watchdog();
 +	}
 +}
 +#else
 +static inline void boot_delay_msec(int level)
 +{
 +}
 +#endif
 +
 +#if defined(CONFIG_PRINTK_TIME)
 +static bool printk_time = 1;
 +#else
 +static bool printk_time;
 +#endif
 +module_param_named(time, printk_time, bool, S_IRUGO | S_IWUSR);
 +
 +static size_t print_time(u64 ts, char *buf)
 +{
 +	unsigned long rem_nsec;
 +
 +	if (!printk_time)
 +		return 0;
 +
 +	rem_nsec = do_div(ts, 1000000000);
 +
 +	if (!buf)
 +		return snprintf(NULL, 0, "[%5lu.000000] ", (unsigned long)ts);
 +
 +	return sprintf(buf, "[%5lu.%06lu] ",
 +		       (unsigned long)ts, rem_nsec / 1000);
 +}
 +
 +static size_t print_prefix(const struct printk_log *msg, bool syslog, char *buf)
 +{
 +	size_t len = 0;
 +	unsigned int prefix = (msg->facility << 3) | msg->level;
 +
 +	if (syslog) {
 +		if (buf) {
 +			len += sprintf(buf, "<%u>", prefix);
 +		} else {
 +			len += 3;
 +			if (prefix > 999)
 +				len += 3;
 +			else if (prefix > 99)
 +				len += 2;
 +			else if (prefix > 9)
 +				len++;
 +		}
 +	}
 +
 +	len += print_time(msg->ts_nsec, buf ? buf + len : NULL);
 +	return len;
 +}
 +
 +static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
 +			     bool syslog, char *buf, size_t size)
 +{
 +	const char *text = log_text(msg);
 +	size_t text_size = msg->text_len;
 +	bool prefix = true;
 +	bool newline = true;
 +	size_t len = 0;
 +
 +	if ((prev & LOG_CONT) && !(msg->flags & LOG_PREFIX))
 +		prefix = false;
 +
 +	if (msg->flags & LOG_CONT) {
 +		if ((prev & LOG_CONT) && !(prev & LOG_NEWLINE))
 +			prefix = false;
 +
 +		if (!(msg->flags & LOG_NEWLINE))
 +			newline = false;
 +	}
 +
 +	do {
 +		const char *next = memchr(text, '\n', text_size);
 +		size_t text_len;
 +
 +		if (next) {
 +			text_len = next - text;
 +			next++;
 +			text_size -= next - text;
 +		} else {
 +			text_len = text_size;
 +		}
 +
 +		if (buf) {
 +			if (print_prefix(msg, syslog, NULL) +
 +			    text_len + 1 >= size - len)
 +				break;
 +
 +			if (prefix)
 +				len += print_prefix(msg, syslog, buf + len);
 +			memcpy(buf + len, text, text_len);
 +			len += text_len;
 +			if (next || newline)
 +				buf[len++] = '\n';
 +		} else {
 +			/* SYSLOG_ACTION_* buffer size only calculation */
 +			if (prefix)
 +				len += print_prefix(msg, syslog, NULL);
 +			len += text_len;
 +			if (next || newline)
 +				len++;
 +		}
 +
 +		prefix = true;
 +		text = next;
 +	} while (text);
 +
 +	return len;
 +}
 +
 +static int syslog_print(char __user *buf, int size)
 +{
 +	char *text;
 +	struct printk_log *msg;
 +	int len = 0;
 +
 +	text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
 +	if (!text)
 +		return -ENOMEM;
 +
 +	while (size > 0) {
 +		size_t n;
 +		size_t skip;
 +
 +		raw_spin_lock_irq(&logbuf_lock);
 +		if (syslog_seq < log_first_seq) {
 +			/* messages are gone, move to first one */
 +			syslog_seq = log_first_seq;
 +			syslog_idx = log_first_idx;
 +			syslog_prev = 0;
 +			syslog_partial = 0;
 +		}
 +		if (syslog_seq == log_next_seq) {
 +			raw_spin_unlock_irq(&logbuf_lock);
 +			break;
 +		}
 +
 +		skip = syslog_partial;
 +		msg = log_from_idx(syslog_idx);
 +		n = msg_print_text(msg, syslog_prev, true, text,
 +				   LOG_LINE_MAX + PREFIX_MAX);
 +		if (n - syslog_partial <= size) {
 +			/* message fits into buffer, move forward */
 +			syslog_idx = log_next(syslog_idx);
 +			syslog_seq++;
 +			syslog_prev = msg->flags;
 +			n -= syslog_partial;
 +			syslog_partial = 0;
 +		} else if (!len){
 +			/* partial read(), remember position */
 +			n = size;
 +			syslog_partial += n;
 +		} else
 +			n = 0;
 +		raw_spin_unlock_irq(&logbuf_lock);
 +
 +		if (!n)
 +			break;
 +
 +		if (copy_to_user(buf, text + skip, n)) {
 +			if (!len)
 +				len = -EFAULT;
 +			break;
 +		}
 +
 +		len += n;
 +		size -= n;
 +		buf += n;
 +	}
 +
 +	kfree(text);
 +	return len;
 +}
 +
 +static int syslog_print_all(char __user *buf, int size, bool clear)
 +{
 +	char *text;
 +	int len = 0;
 +
 +	text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
 +	if (!text)
 +		return -ENOMEM;
 +
 +	raw_spin_lock_irq(&logbuf_lock);
 +	if (buf) {
 +		u64 next_seq;
 +		u64 seq;
 +		u32 idx;
 +		enum log_flags prev;
 +
 +		if (clear_seq < log_first_seq) {
 +			/* messages are gone, move to first available one */
 +			clear_seq = log_first_seq;
 +			clear_idx = log_first_idx;
 +		}
 +
 +		/*
 +		 * Find first record that fits, including all following records,
 +		 * into the user-provided buffer for this dump.
 +		 */
 +		seq = clear_seq;
 +		idx = clear_idx;
 +		prev = 0;
 +		while (seq < log_next_seq) {
 +			struct printk_log *msg = log_from_idx(idx);
 +
 +			len += msg_print_text(msg, prev, true, NULL, 0);
 +			prev = msg->flags;
 +			idx = log_next(idx);
 +			seq++;
 +		}
 +
 +		/* move first record forward until length fits into the buffer */
 +		seq = clear_seq;
 +		idx = clear_idx;
 +		prev = 0;
 +		while (len > size && seq < log_next_seq) {
 +			struct printk_log *msg = log_from_idx(idx);
 +
 +			len -= msg_print_text(msg, prev, true, NULL, 0);
 +			prev = msg->flags;
 +			idx = log_next(idx);
 +			seq++;
 +		}
 +
 +		/* last message fitting into this dump */
 +		next_seq = log_next_seq;
 +
 +		len = 0;
 +		prev = 0;
 +		while (len >= 0 && seq < next_seq) {
 +			struct printk_log *msg = log_from_idx(idx);
 +			int textlen;
 +
 +			textlen = msg_print_text(msg, prev, true, text,
 +						 LOG_LINE_MAX + PREFIX_MAX);
 +			if (textlen < 0) {
 +				len = textlen;
 +				break;
 +			}
 +			idx = log_next(idx);
 +			seq++;
 +			prev = msg->flags;
 +
 +			raw_spin_unlock_irq(&logbuf_lock);
 +			if (copy_to_user(buf + len, text, textlen))
 +				len = -EFAULT;
 +			else
 +				len += textlen;
 +			raw_spin_lock_irq(&logbuf_lock);
 +
 +			if (seq < log_first_seq) {
 +				/* messages are gone, move to next one */
 +				seq = log_first_seq;
 +				idx = log_first_idx;
 +				prev = 0;
 +			}
 +		}
 +	}
 +
 +	if (clear) {
 +		clear_seq = log_next_seq;
 +		clear_idx = log_next_idx;
 +	}
 +	raw_spin_unlock_irq(&logbuf_lock);
 +
 +	kfree(text);
 +	return len;
 +}
 +
 +int do_syslog(int type, char __user *buf, int len, bool from_file)
 +{
 +	bool clear = false;
 +	static int saved_console_loglevel = -1;
 +	int error;
 +
 +	error = check_syslog_permissions(type, from_file);
 +	if (error)
 +		goto out;
 +
 +	error = security_syslog(type);
 +	if (error)
 +		return error;
 +
 +	switch (type) {
 +	case SYSLOG_ACTION_CLOSE:	/* Close log */
 +		break;
 +	case SYSLOG_ACTION_OPEN:	/* Open log */
 +		break;
 +	case SYSLOG_ACTION_READ:	/* Read from log */
 +		error = -EINVAL;
 +		if (!buf || len < 0)
 +			goto out;
 +		error = 0;
 +		if (!len)
 +			goto out;
 +		if (!access_ok(VERIFY_WRITE, buf, len)) {
 +			error = -EFAULT;
 +			goto out;
 +		}
 +		error = wait_event_interruptible(log_wait,
 +						 syslog_seq != log_next_seq);
 +		if (error)
 +			goto out;
 +		error = syslog_print(buf, len);
 +		break;
 +	/* Read/clear last kernel messages */
 +	case SYSLOG_ACTION_READ_CLEAR:
 +		clear = true;
 +		/* FALL THRU */
 +	/* Read last kernel messages */
 +	case SYSLOG_ACTION_READ_ALL:
 +		error = -EINVAL;
 +		if (!buf || len < 0)
 +			goto out;
 +		error = 0;
 +		if (!len)
 +			goto out;
 +		if (!access_ok(VERIFY_WRITE, buf, len)) {
 +			error = -EFAULT;
 +			goto out;
 +		}
 +		error = syslog_print_all(buf, len, clear);
 +		break;
 +	/* Clear ring buffer */
 +	case SYSLOG_ACTION_CLEAR:
 +		syslog_print_all(NULL, 0, true);
 +		break;
 +	/* Disable logging to console */
 +	case SYSLOG_ACTION_CONSOLE_OFF:
 +		if (saved_console_loglevel == -1)
 +			saved_console_loglevel = console_loglevel;
 +		console_loglevel = minimum_console_loglevel;
 +		break;
 +	/* Enable logging to console */
 +	case SYSLOG_ACTION_CONSOLE_ON:
 +		if (saved_console_loglevel != -1) {
 +			console_loglevel = saved_console_loglevel;
 +			saved_console_loglevel = -1;
 +		}
 +		break;
 +	/* Set level of messages printed to console */
 +	case SYSLOG_ACTION_CONSOLE_LEVEL:
 +		error = -EINVAL;
 +		if (len < 1 || len > 8)
 +			goto out;
 +		if (len < minimum_console_loglevel)
 +			len = minimum_console_loglevel;
 +		console_loglevel = len;
 +		/* Implicitly re-enable logging to console */
 +		saved_console_loglevel = -1;
 +		error = 0;
 +		break;
 +	/* Number of chars in the log buffer */
 +	case SYSLOG_ACTION_SIZE_UNREAD:
 +		raw_spin_lock_irq(&logbuf_lock);
 +		if (syslog_seq < log_first_seq) {
 +			/* messages are gone, move to first one */
 +			syslog_seq = log_first_seq;
 +			syslog_idx = log_first_idx;
 +			syslog_prev = 0;
 +			syslog_partial = 0;
 +		}
 +		if (from_file) {
 +			/*
 +			 * Short-cut for poll(/"proc/kmsg") which simply checks
 +			 * for pending data, not the size; return the count of
 +			 * records, not the length.
 +			 */
 +			error = log_next_idx - syslog_idx;
 +		} else {
 +			u64 seq = syslog_seq;
 +			u32 idx = syslog_idx;
 +			enum log_flags prev = syslog_prev;
 +
 +			error = 0;
 +			while (seq < log_next_seq) {
 +				struct printk_log *msg = log_from_idx(idx);
 +
 +				error += msg_print_text(msg, prev, true, NULL, 0);
 +				idx = log_next(idx);
 +				seq++;
 +				prev = msg->flags;
 +			}
 +			error -= syslog_partial;
 +		}
 +		raw_spin_unlock_irq(&logbuf_lock);
 +		break;
 +	/* Size of the log buffer */
 +	case SYSLOG_ACTION_SIZE_BUFFER:
 +		error = log_buf_len;
 +		break;
 +	default:
 +		error = -EINVAL;
 +		break;
 +	}
 +out:
 +	return error;
 +}
 +
 +SYSCALL_DEFINE3(syslog, int, type, char __user *, buf, int, len)
 +{
 +	return do_syslog(type, buf, len, SYSLOG_FROM_READER);
 +}
 +
 +/*
 + * Call the console drivers, asking them to write out
 + * log_buf[start] to log_buf[end - 1].
 + * The console_lock must be held.
 + */
 +static void call_console_drivers(int level, const char *text, size_t len)
 +{
 +	struct console *con;
 +
 +	trace_console(text, len);
 +
- 	if (level >= console_loglevel && !ignore_loglevel)
- 		return;
 +	if (!console_drivers)
 +		return;
 +
 +	for_each_console(con) {
 +		if (exclusive_console && con != exclusive_console)
 +			continue;
 +		if (!(con->flags & CON_ENABLED))
 +			continue;
 +		if (!con->write)
 +			continue;
 +		if (!cpu_online(smp_processor_id()) &&
 +		    !(con->flags & CON_ANYTIME))
 +			continue;
++		if (level >= console_loglevel && !ignore_loglevel &&
++		    !(con->flags & CON_ALLDATA))
++			continue;
 +		con->write(con, text, len);
 +	}
 +}
 +
 +/*
 + * Zap console related locks when oopsing. Only zap at most once
 + * every 10 seconds, to leave time for slow consoles to print a
 + * full oops.
 + */
 +static void zap_locks(void)
 +{
 +	static unsigned long oops_timestamp;
 +
 +	if (time_after_eq(jiffies, oops_timestamp) &&
 +			!time_after(jiffies, oops_timestamp + 30 * HZ))
 +		return;
 +
 +	oops_timestamp = jiffies;
 +
 +	debug_locks_off();
 +	/* If a crash is occurring, make sure we can't deadlock */
 +	raw_spin_lock_init(&logbuf_lock);
 +	/* And make sure that we print immediately */
 +	sema_init(&console_sem, 1);
 +}
 +
 +/* Check if we have any console registered that can be called early in boot. */
 +static int have_callable_console(void)
 +{
 +	struct console *con;
 +
 +	for_each_console(con)
 +		if (con->flags & CON_ANYTIME)
 +			return 1;
 +
 +	return 0;
 +}
 +
 +/*
 + * Can we actually use the console at this time on this cpu?
 + *
 + * Console drivers may assume that per-cpu resources have
 + * been allocated. So unless they're explicitly marked as
 + * being able to cope (CON_ANYTIME) don't call them until
 + * this CPU is officially up.
 + */
 +static inline int can_use_console(unsigned int cpu)
 +{
 +	return cpu_online(cpu) || have_callable_console();
 +}
 +
 +/*
 + * Try to get console ownership to actually show the kernel
 + * messages from a 'printk'. Return true (and with the
 + * console_lock held, and 'console_locked' set) if it
 + * is successful, false otherwise.
 + *
 + * This gets called with the 'logbuf_lock' spinlock held and
 + * interrupts disabled. It should return with 'lockbuf_lock'
 + * released but interrupts still disabled.
 + */
 +static int console_trylock_for_printk(unsigned int cpu)
 +	__releases(&logbuf_lock)
 +{
 +	int retval = 0, wake = 0;
 +
 +	if (console_trylock()) {
 +		retval = 1;
 +
 +		/*
 +		 * If we can't use the console, we need to release
 +		 * the console semaphore by hand to avoid flushing
 +		 * the buffer. We need to hold the console semaphore
 +		 * in order to do this test safely.
 +		 */
 +		if (!can_use_console(cpu)) {
 +			console_locked = 0;
 +			wake = 1;
 +			retval = 0;
 +		}
 +	}
 +	logbuf_cpu = UINT_MAX;
 +	raw_spin_unlock(&logbuf_lock);
 +	if (wake)
 +		up(&console_sem);
 +	return retval;
 +}
 +
 +int printk_delay_msec __read_mostly;
 +
 +static inline void printk_delay(void)
 +{
 +	if (unlikely(printk_delay_msec)) {
 +		int m = printk_delay_msec;
 +
 +		while (m--) {
 +			mdelay(1);
 +			touch_nmi_watchdog();
 +		}
 +	}
 +}
 +
 +/*
 + * Continuation lines are buffered, and not committed to the record buffer
 + * until the line is complete, or a race forces it. The line fragments
 + * though, are printed immediately to the consoles to ensure everything has
 + * reached the console in case of a kernel crash.
 + */
 +static struct cont {
 +	char buf[LOG_LINE_MAX];
 +	size_t len;			/* length == 0 means unused buffer */
 +	size_t cons;			/* bytes written to console */
 +	struct task_struct *owner;	/* task of first print*/
 +	u64 ts_nsec;			/* time of first print */
 +	u8 level;			/* log level of first message */
 +	u8 facility;			/* log level of first message */
 +	enum log_flags flags;		/* prefix, newline flags */
 +	bool flushed:1;			/* buffer sealed and committed */
 +} cont;
 +
 +static void cont_flush(enum log_flags flags)
 +{
 +	if (cont.flushed)
 +		return;
 +	if (cont.len == 0)
 +		return;
 +
 +	if (cont.cons) {
 +		/*
 +		 * If a fragment of this line was directly flushed to the
 +		 * console; wait for the console to pick up the rest of the
 +		 * line. LOG_NOCONS suppresses a duplicated output.
 +		 */
 +		log_store(cont.facility, cont.level, flags | LOG_NOCONS,
 +			  cont.ts_nsec, NULL, 0, cont.buf, cont.len);
 +		cont.flags = flags;
 +		cont.flushed = true;
 +	} else {
 +		/*
 +		 * If no fragment of this line ever reached the console,
 +		 * just submit it to the store and free the buffer.
 +		 */
 +		log_store(cont.facility, cont.level, flags, 0,
 +			  NULL, 0, cont.buf, cont.len);
 +		cont.len = 0;
 +	}
 +}
 +
 +static bool cont_add(int facility, int level, const char *text, size_t len)
 +{
 +	if (cont.len && cont.flushed)
 +		return false;
 +
 +	if (cont.len + len > sizeof(cont.buf)) {
 +		/* the line gets too long, split it up in separate records */
 +		cont_flush(LOG_CONT);
 +		return false;
 +	}
 +
 +	if (!cont.len) {
 +		cont.facility = facility;
 +		cont.level = level;
 +		cont.owner = current;
 +		cont.ts_nsec = local_clock();
 +		cont.flags = 0;
 +		cont.cons = 0;
 +		cont.flushed = false;
 +	}
 +
 +	memcpy(cont.buf + cont.len, text, len);
 +	cont.len += len;
 +
 +	if (cont.len > (sizeof(cont.buf) * 80) / 100)
 +		cont_flush(LOG_CONT);
 +
 +	return true;
 +}
 +
 +static size_t cont_print_text(char *text, size_t size)
 +{
 +	size_t textlen = 0;
 +	size_t len;
 +
 +	if (cont.cons == 0 && (console_prev & LOG_NEWLINE)) {
 +		textlen += print_time(cont.ts_nsec, text);
 +		size -= textlen;
 +	}
 +
 +	len = cont.len - cont.cons;
 +	if (len > 0) {
 +		if (len+1 > size)
 +			len = size-1;
 +		memcpy(text + textlen, cont.buf + cont.cons, len);
 +		textlen += len;
 +		cont.cons = cont.len;
 +	}
 +
 +	if (cont.flushed) {
 +		if (cont.flags & LOG_NEWLINE)
 +			text[textlen++] = '\n';
 +		/* got everything, release buffer */
 +		cont.len = 0;
 +	}
 +	return textlen;
 +}
 +
 +asmlinkage int vprintk_emit(int facility, int level,
 +			    const char *dict, size_t dictlen,
 +			    const char *fmt, va_list args)
 +{
 +	static int recursion_bug;
 +	static char textbuf[LOG_LINE_MAX];
 +	char *text = textbuf;
 +	size_t text_len;
 +	enum log_flags lflags = 0;
 +	unsigned long flags;
 +	int this_cpu;
 +	int printed_len = 0;
 +
 +	boot_delay_msec(level);
 +	printk_delay();
 +
 +	/* This stops the holder of console_sem just where we want him */
 +	local_irq_save(flags);
 +	this_cpu = smp_processor_id();
 +
 +	/*
 +	 * Ouch, printk recursed into itself!
 +	 */
 +	if (unlikely(logbuf_cpu == this_cpu)) {
 +		/*
 +		 * If a crash is occurring during printk() on this CPU,
 +		 * then try to get the crash message out but make sure
 +		 * we can't deadlock. Otherwise just return to avoid the
 +		 * recursion and return - but flag the recursion so that
 +		 * it can be printed at the next appropriate moment:
 +		 */
 +		if (!oops_in_progress && !lockdep_recursing(current)) {
 +			recursion_bug = 1;
 +			goto out_restore_irqs;
 +		}
 +		zap_locks();
 +	}
 +
 +	lockdep_off();
 +	raw_spin_lock(&logbuf_lock);
 +	logbuf_cpu = this_cpu;
 +
 +	if (recursion_bug) {
 +		static const char recursion_msg[] =
 +			"BUG: recent printk recursion!";
 +
 +		recursion_bug = 0;
 +		printed_len += strlen(recursion_msg);
 +		/* emit KERN_CRIT message */
 +		log_store(0, 2, LOG_PREFIX|LOG_NEWLINE, 0,
 +			  NULL, 0, recursion_msg, printed_len);
 +	}
 +
 +	/*
 +	 * The printf needs to come first; we need the syslog
 +	 * prefix which might be passed-in as a parameter.
 +	 */
 +	text_len = vscnprintf(text, sizeof(textbuf), fmt, args);
 +
 +	/* mark and strip a trailing newline */
 +	if (text_len && text[text_len-1] == '\n') {
 +		text_len--;
 +		lflags |= LOG_NEWLINE;
 +	}
 +
 +	/* strip kernel syslog prefix and extract log level or control flags */
 +	if (facility == 0) {
 +		int kern_level = printk_get_level(text);
 +
 +		if (kern_level) {
 +			const char *end_of_header = printk_skip_level(text);
 +			switch (kern_level) {
 +			case '0' ... '7':
 +				if (level == -1)
 +					level = kern_level - '0';
 +			case 'd':	/* KERN_DEFAULT */
 +				lflags |= LOG_PREFIX;
 +			case 'c':	/* KERN_CONT */
 +				break;
 +			}
 +			text_len -= end_of_header - text;
 +			text = (char *)end_of_header;
 +		}
 +	}
 +
 +	if (level == -1)
 +		level = default_message_loglevel;
 +
 +	if (dict)
 +		lflags |= LOG_PREFIX|LOG_NEWLINE;
 +
 +	if (!(lflags & LOG_NEWLINE)) {
 +		/*
 +		 * Flush the conflicting buffer. An earlier newline was missing,
 +		 * or another task also prints continuation lines.
 +		 */
 +		if (cont.len && (lflags & LOG_PREFIX || cont.owner != current))
 +			cont_flush(LOG_NEWLINE);
 +
 +		/* buffer line if possible, otherwise store it right away */
 +		if (!cont_add(facility, level, text, text_len))
 +			log_store(facility, level, lflags | LOG_CONT, 0,
 +				  dict, dictlen, text, text_len);
 +	} else {
 +		bool stored = false;
 +
 +		/*
 +		 * If an earlier newline was missing and it was the same task,
 +		 * either merge it with the current buffer and flush, or if
 +		 * there was a race with interrupts (prefix == true) then just
 +		 * flush it out and store this line separately.
 +		 */
 +		if (cont.len && cont.owner == current) {
 +			if (!(lflags & LOG_PREFIX))
 +				stored = cont_add(facility, level, text, text_len);
 +			cont_flush(LOG_NEWLINE);
 +		}
 +
 +		if (!stored)
 +			log_store(facility, level, lflags, 0,
 +				  dict, dictlen, text, text_len);
 +	}
 +	printed_len += text_len;
 +
 +	/*
 +	 * Try to acquire and then immediately release the console semaphore.
 +	 * The release will print out buffers and wake up /dev/kmsg and syslog()
 +	 * users.
 +	 *
 +	 * The console_trylock_for_printk() function will release 'logbuf_lock'
 +	 * regardless of whether it actually gets the console semaphore or not.
 +	 */
 +	if (console_trylock_for_printk(this_cpu))
 +		console_unlock();
 +
 +	lockdep_on();
 +out_restore_irqs:
 +	local_irq_restore(flags);
 +
 +	return printed_len;
 +}
 +EXPORT_SYMBOL(vprintk_emit);
 +
 +asmlinkage int vprintk(const char *fmt, va_list args)
 +{
 +	return vprintk_emit(0, -1, NULL, 0, fmt, args);
 +}
 +EXPORT_SYMBOL(vprintk);
 +
 +asmlinkage int printk_emit(int facility, int level,
 +			   const char *dict, size_t dictlen,
 +			   const char *fmt, ...)
 +{
 +	va_list args;
 +	int r;
 +
 +	va_start(args, fmt);
 +	r = vprintk_emit(facility, level, dict, dictlen, fmt, args);
 +	va_end(args);
 +
 +	return r;
 +}
 +EXPORT_SYMBOL(printk_emit);
 +
 +/**
 + * printk - print a kernel message
 + * @fmt: format string
 + *
 + * This is printk(). It can be called from any context. We want it to work.
 + *
 + * We try to grab the console_lock. If we succeed, it's easy - we log the
 + * output and call the console drivers.  If we fail to get the semaphore, we
 + * place the output into the log buffer and return. The current holder of
 + * the console_sem will notice the new output in console_unlock(); and will
 + * send it to the consoles before releasing the lock.
 + *
 + * One effect of this deferred printing is that code which calls printk() and
 + * then changes console_loglevel may break. This is because console_loglevel
 + * is inspected when the actual printing occurs.
 + *
 + * See also:
 + * printf(3)
 + *
 + * See the vsnprintf() documentation for format string extensions over C99.
 + */
 +asmlinkage int printk(const char *fmt, ...)
 +{
 +	va_list args;
 +	int r;
 +
 +#ifdef CONFIG_KGDB_KDB
 +	if (unlikely(kdb_trap_printk)) {
 +		va_start(args, fmt);
 +		r = vkdb_printf(fmt, args);
 +		va_end(args);
 +		return r;
 +	}
 +#endif
 +	va_start(args, fmt);
 +	r = vprintk_emit(0, -1, NULL, 0, fmt, args);
 +	va_end(args);
 +
 +	return r;
 +}
 +EXPORT_SYMBOL(printk);
 +
 +#else /* CONFIG_PRINTK */
 +
 +#define LOG_LINE_MAX		0
 +#define PREFIX_MAX		0
 +#define LOG_LINE_MAX 0
 +static u64 syslog_seq;
 +static u32 syslog_idx;
 +static u64 console_seq;
 +static u32 console_idx;
 +static enum log_flags syslog_prev;
 +static u64 log_first_seq;
 +static u32 log_first_idx;
 +static u64 log_next_seq;
 +static enum log_flags console_prev;
 +static struct cont {
 +	size_t len;
 +	size_t cons;
 +	u8 level;
 +	bool flushed:1;
 +} cont;
 +static struct printk_log *log_from_idx(u32 idx) { return NULL; }
 +static u32 log_next(u32 idx) { return 0; }
 +static void call_console_drivers(int level, const char *text, size_t len) {}
 +static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
 +			     bool syslog, char *buf, size_t size) { return 0; }
 +static size_t cont_print_text(char *text, size_t size) { return 0; }
 +
 +#endif /* CONFIG_PRINTK */
 +
 +#ifdef CONFIG_EARLY_PRINTK
 +struct console *early_console;
 +
 +void early_vprintk(const char *fmt, va_list ap)
 +{
 +	if (early_console) {
 +		char buf[512];
 +		int n = vscnprintf(buf, sizeof(buf), fmt, ap);
 +
 +		early_console->write(early_console, buf, n);
 +	}
 +}
 +
 +asmlinkage void early_printk(const char *fmt, ...)
 +{
 +	va_list ap;
 +
 +	va_start(ap, fmt);
 +	early_vprintk(fmt, ap);
 +	va_end(ap);
 +}
 +#endif
 +
 +static int __add_preferred_console(char *name, int idx, char *options,
 +				   char *brl_options)
 +{
 +	struct console_cmdline *c;
 +	int i;
 +
 +	/*
 +	 *	See if this tty is not yet registered, and
 +	 *	if we have a slot free.
 +	 */
 +	for (i = 0, c = console_cmdline;
 +	     i < MAX_CMDLINECONSOLES && c->name[0];
 +	     i++, c++) {
 +		if (strcmp(c->name, name) == 0 && c->index == idx) {
 +			if (!brl_options)
 +				selected_console = i;
 +			return 0;
 +		}
 +	}
 +	if (i == MAX_CMDLINECONSOLES)
 +		return -E2BIG;
 +	if (!brl_options)
 +		selected_console = i;
 +	strlcpy(c->name, name, sizeof(c->name));
 +	c->options = options;
 +	braille_set_options(c, brl_options);
 +
 +	c->index = idx;
 +	return 0;
 +}
 +/*
 + * Set up a list of consoles.  Called from init/main.c
 + */
 +static int __init console_setup(char *str)
 +{
 +	char buf[sizeof(console_cmdline[0].name) + 4]; /* 4 for index */
 +	char *s, *options, *brl_options = NULL;
 +	int idx;
 +
 +	if (_braille_console_setup(&str, &brl_options))
 +		return 1;
 +
 +	/*
 +	 * Decode str into name, index, options.
 +	 */
 +	if (str[0] >= '0' && str[0] <= '9') {
 +		strcpy(buf, "ttyS");
 +		strncpy(buf + 4, str, sizeof(buf) - 5);
 +	} else {
 +		strncpy(buf, str, sizeof(buf) - 1);
 +	}
 +	buf[sizeof(buf) - 1] = 0;
 +	if ((options = strchr(str, ',')) != NULL)
 +		*(options++) = 0;
 +#ifdef __sparc__
 +	if (!strcmp(str, "ttya"))
 +		strcpy(buf, "ttyS0");
 +	if (!strcmp(str, "ttyb"))
 +		strcpy(buf, "ttyS1");
 +#endif
 +	for (s = buf; *s; s++)
 +		if ((*s >= '0' && *s <= '9') || *s == ',')
 +			break;
 +	idx = simple_strtoul(s, NULL, 10);
 +	*s = 0;
 +
 +	__add_preferred_console(buf, idx, options, brl_options);
 +	console_set_on_cmdline = 1;
 +	return 1;
 +}
 +__setup("console=", console_setup);
 +
 +/**
 + * add_preferred_console - add a device to the list of preferred consoles.
 + * @name: device name
 + * @idx: device index
 + * @options: options for this console
 + *
 + * The last preferred console added will be used for kernel messages
 + * and stdin/out/err for init.  Normally this is used by console_setup
 + * above to handle user-supplied console arguments; however it can also
 + * be used by arch-specific code either to override the user or more
 + * commonly to provide a default console (ie from PROM variables) when
 + * the user has not supplied one.
 + */
 +int add_preferred_console(char *name, int idx, char *options)
 +{
 +	return __add_preferred_console(name, idx, options, NULL);
 +}
 +
 +int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, char *options)
 +{
 +	struct console_cmdline *c;
 +	int i;
 +
 +	for (i = 0, c = console_cmdline;
 +	     i < MAX_CMDLINECONSOLES && c->name[0];
 +	     i++, c++)
 +		if (strcmp(c->name, name) == 0 && c->index == idx) {
 +			strlcpy(c->name, name_new, sizeof(c->name));
 +			c->name[sizeof(c->name) - 1] = 0;
 +			c->options = options;
 +			c->index = idx_new;
 +			return i;
 +		}
 +	/* not found */
 +	return -1;
 +}
 +
 +bool console_suspend_enabled = 1;
 +EXPORT_SYMBOL(console_suspend_enabled);
 +
 +static int __init console_suspend_disable(char *str)
 +{
 +	console_suspend_enabled = 0;
 +	return 1;
 +}
 +__setup("no_console_suspend", console_suspend_disable);
 +module_param_named(console_suspend, console_suspend_enabled,
 +		bool, S_IRUGO | S_IWUSR);
 +MODULE_PARM_DESC(console_suspend, "suspend console during suspend"
 +	" and hibernate operations");
 +
 +/**
 + * suspend_console - suspend the console subsystem
 + *
 + * This disables printk() while we go into suspend states
 + */
 +void suspend_console(void)
 +{
 +	if (!console_suspend_enabled)
 +		return;
 +	printk("Suspending console(s) (use no_console_suspend to debug)\n");
 +	console_lock();
 +	console_suspended = 1;
 +	up(&console_sem);
 +}
 +
 +void resume_console(void)
 +{
 +	if (!console_suspend_enabled)
 +		return;
 +	down(&console_sem);
 +	console_suspended = 0;
 +	console_unlock();
 +}
 +
 +/**
 + * console_cpu_notify - print deferred console messages after CPU hotplug
 + * @self: notifier struct
 + * @action: CPU hotplug event
 + * @hcpu: unused
 + *
 + * If printk() is called from a CPU that is not online yet, the messages
 + * will be spooled but will not show up on the console.  This function is
 + * called when a new CPU comes online (or fails to come up), and ensures
 + * that any such output gets printed.
 + */
 +static int console_cpu_notify(struct notifier_block *self,
 +	unsigned long action, void *hcpu)
 +{
 +	switch (action) {
 +	case CPU_ONLINE:
 +	case CPU_DEAD:
 +	case CPU_DOWN_FAILED:
 +	case CPU_UP_CANCELED:
 +		console_lock();
 +		console_unlock();
 +	}
 +	return NOTIFY_OK;
 +}
 +
 +/**
 + * console_lock - lock the console system for exclusive use.
 + *
 + * Acquires a lock which guarantees that the caller has
 + * exclusive access to the console system and the console_drivers list.
 + *
 + * Can sleep, returns nothing.
 + */
 +void console_lock(void)
 +{
 +	might_sleep();
 +
 +	down(&console_sem);
 +	if (console_suspended)
 +		return;
 +	console_locked = 1;
 +	console_may_schedule = 1;
 +	mutex_acquire(&console_lock_dep_map, 0, 0, _RET_IP_);
 +}
 +EXPORT_SYMBOL(console_lock);
 +
 +/**
 + * console_trylock - try to lock the console system for exclusive use.
 + *
 + * Tried to acquire a lock which guarantees that the caller has
 + * exclusive access to the console system and the console_drivers list.
 + *
 + * returns 1 on success, and 0 on failure to acquire the lock.
 + */
 +int console_trylock(void)
 +{
 +	if (down_trylock(&console_sem))
 +		return 0;
 +	if (console_suspended) {
 +		up(&console_sem);
 +		return 0;
 +	}
 +	console_locked = 1;
 +	console_may_schedule = 0;
 +	mutex_acquire(&console_lock_dep_map, 0, 1, _RET_IP_);
 +	return 1;
 +}
 +EXPORT_SYMBOL(console_trylock);
 +
 +int is_console_locked(void)
 +{
 +	return console_locked;
 +}
 +
 +static void console_cont_flush(char *text, size_t size)
 +{
 +	unsigned long flags;
 +	size_t len;
 +
 +	raw_spin_lock_irqsave(&logbuf_lock, flags);
 +
 +	if (!cont.len)
 +		goto out;
 +
 +	/*
 +	 * We still queue earlier records, likely because the console was
 +	 * busy. The earlier ones need to be printed before this one, we
 +	 * did not flush any fragment so far, so just let it queue up.
 +	 */
 +	if (console_seq < log_next_seq && !cont.cons)
 +		goto out;
 +
 +	len = cont_print_text(text, size);
 +	raw_spin_unlock(&logbuf_lock);
 +	stop_critical_timings();
 +	call_console_drivers(cont.level, text, len);
 +	start_critical_timings();
 +	local_irq_restore(flags);
 +	return;
 +out:
 +	raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +}
 +
 +/**
 + * console_unlock - unlock the console system
 + *
 + * Releases the console_lock which the caller holds on the console system
 + * and the console driver list.
 + *
 + * While the console_lock was held, console output may have been buffered
 + * by printk().  If this is the case, console_unlock(); emits
 + * the output prior to releasing the lock.
 + *
 + * If there is output waiting, we wake /dev/kmsg and syslog() users.
 + *
 + * console_unlock(); may be called from any context.
 + */
 +void console_unlock(void)
 +{
 +	static char text[LOG_LINE_MAX + PREFIX_MAX];
 +	static u64 seen_seq;
 +	unsigned long flags;
 +	bool wake_klogd = false;
 +	bool retry;
 +
 +	if (console_suspended) {
 +		up(&console_sem);
 +		return;
 +	}
 +
 +	console_may_schedule = 0;
 +
 +	/* flush buffered message fragment immediately to console */
 +	console_cont_flush(text, sizeof(text));
 +again:
 +	for (;;) {
 +		struct printk_log *msg;
 +		size_t len;
 +		int level;
 +
 +		raw_spin_lock_irqsave(&logbuf_lock, flags);
 +		if (seen_seq != log_next_seq) {
 +			wake_klogd = true;
 +			seen_seq = log_next_seq;
 +		}
 +
 +		if (console_seq < log_first_seq) {
 +			/* messages are gone, move to first one */
 +			console_seq = log_first_seq;
 +			console_idx = log_first_idx;
 +			console_prev = 0;
 +		}
 +skip:
 +		if (console_seq == log_next_seq)
 +			break;
 +
 +		msg = log_from_idx(console_idx);
 +		if (msg->flags & LOG_NOCONS) {
 +			/*
 +			 * Skip record we have buffered and already printed
 +			 * directly to the console when we received it.
 +			 */
 +			console_idx = log_next(console_idx);
 +			console_seq++;
 +			/*
 +			 * We will get here again when we register a new
 +			 * CON_PRINTBUFFER console. Clear the flag so we
 +			 * will properly dump everything later.
 +			 */
 +			msg->flags &= ~LOG_NOCONS;
 +			console_prev = msg->flags;
 +			goto skip;
 +		}
 +
 +		level = msg->level;
 +		len = msg_print_text(msg, console_prev, false,
 +				     text, sizeof(text));
 +		console_idx = log_next(console_idx);
 +		console_seq++;
 +		console_prev = msg->flags;
 +		raw_spin_unlock(&logbuf_lock);
 +
 +		stop_critical_timings();	/* don't trace print latency */
 +		call_console_drivers(level, text, len);
 +		start_critical_timings();
 +		local_irq_restore(flags);
 +	}
 +	console_locked = 0;
 +	mutex_release(&console_lock_dep_map, 1, _RET_IP_);
 +
 +	/* Release the exclusive_console once it is used */
 +	if (unlikely(exclusive_console))
 +		exclusive_console = NULL;
 +
 +	raw_spin_unlock(&logbuf_lock);
 +
 +	up(&console_sem);
 +
 +	/*
 +	 * Someone could have filled up the buffer again, so re-check if there's
 +	 * something to flush. In case we cannot trylock the console_sem again,
 +	 * there's a new owner and the console_unlock() from them will do the
 +	 * flush, no worries.
 +	 */
 +	raw_spin_lock(&logbuf_lock);
 +	retry = console_seq != log_next_seq;
 +	raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +
 +	if (retry && console_trylock())
 +		goto again;
 +
 +	if (wake_klogd)
 +		wake_up_klogd();
 +}
 +EXPORT_SYMBOL(console_unlock);
 +
 +/**
 + * console_conditional_schedule - yield the CPU if required
 + *
 + * If the console code is currently allowed to sleep, and
 + * if this CPU should yield the CPU to another task, do
 + * so here.
 + *
 + * Must be called within console_lock();.
 + */
 +void __sched console_conditional_schedule(void)
 +{
 +	if (console_may_schedule)
 +		cond_resched();
 +}
 +EXPORT_SYMBOL(console_conditional_schedule);
 +
 +void console_unblank(void)
 +{
 +	struct console *c;
 +
 +	/*
 +	 * console_unblank can no longer be called in interrupt context unless
 +	 * oops_in_progress is set to 1..
 +	 */
 +	if (oops_in_progress) {
 +		if (down_trylock(&console_sem) != 0)
 +			return;
 +	} else
 +		console_lock();
 +
 +	console_locked = 1;
 +	console_may_schedule = 0;
 +	for_each_console(c)
 +		if ((c->flags & CON_ENABLED) && c->unblank)
 +			c->unblank();
 +	console_unlock();
 +}
 +
 +/*
 + * Return the console tty driver structure and its associated index
 + */
 +struct tty_driver *console_device(int *index)
 +{
 +	struct console *c;
 +	struct tty_driver *driver = NULL;
 +
 +	console_lock();
 +	for_each_console(c) {
 +		if (!c->device)
 +			continue;
 +		driver = c->device(c, index);
 +		if (driver)
 +			break;
 +	}
 +	console_unlock();
 +	return driver;
 +}
 +
 +/*
 + * Prevent further output on the passed console device so that (for example)
 + * serial drivers can disable console output before suspending a port, and can
 + * re-enable output afterwards.
 + */
 +void console_stop(struct console *console)
 +{
 +	console_lock();
 +	console->flags &= ~CON_ENABLED;
 +	console_unlock();
 +}
 +EXPORT_SYMBOL(console_stop);
 +
 +void console_start(struct console *console)
 +{
 +	console_lock();
 +	console->flags |= CON_ENABLED;
 +	console_unlock();
 +}
 +EXPORT_SYMBOL(console_start);
 +
 +static int __read_mostly keep_bootcon;
 +
 +static int __init keep_bootcon_setup(char *str)
 +{
 +	keep_bootcon = 1;
 +	printk(KERN_INFO "debug: skip boot console de-registration.\n");
 +
 +	return 0;
 +}
 +
 +early_param("keep_bootcon", keep_bootcon_setup);
 +
 +/*
 + * The console driver calls this routine during kernel initialization
 + * to register the console printing procedure with printk() and to
 + * print any messages that were printed by the kernel before the
 + * console driver was initialized.
 + *
 + * This can happen pretty early during the boot process (because of
 + * early_printk) - sometimes before setup_arch() completes - be careful
 + * of what kernel features are used - they may not be initialised yet.
 + *
 + * There are two types of consoles - bootconsoles (early_printk) and
 + * "real" consoles (everything which is not a bootconsole) which are
 + * handled differently.
 + *  - Any number of bootconsoles can be registered at any time.
 + *  - As soon as a "real" console is registered, all bootconsoles
 + *    will be unregistered automatically.
 + *  - Once a "real" console is registered, any attempt to register a
 + *    bootconsoles will be rejected
 + */
 +void register_console(struct console *newcon)
 +{
 +	int i;
 +	unsigned long flags;
 +	struct console *bcon = NULL;
 +	struct console_cmdline *c;
 +
 +	if (console_drivers)
 +		for_each_console(bcon)
 +			if (WARN(bcon == newcon,
 +					"console '%s%d' already registered\n",
 +					bcon->name, bcon->index))
 +				return;
 +
 +	/*
 +	 * before we register a new CON_BOOT console, make sure we don't
 +	 * already have a valid console
 +	 */
 +	if (console_drivers && newcon->flags & CON_BOOT) {
 +		/* find the last or real console */
 +		for_each_console(bcon) {
 +			if (!(bcon->flags & CON_BOOT)) {
 +				printk(KERN_INFO "Too late to register bootconsole %s%d\n",
 +					newcon->name, newcon->index);
 +				return;
 +			}
 +		}
 +	}
 +
 +	if (console_drivers && console_drivers->flags & CON_BOOT)
 +		bcon = console_drivers;
 +
 +	if (preferred_console < 0 || bcon || !console_drivers)
 +		preferred_console = selected_console;
 +
 +	if (newcon->early_setup)
 +		newcon->early_setup();
 +
 +	/*
 +	 *	See if we want to use this console driver. If we
 +	 *	didn't select a console we take the first one
 +	 *	that registers here.
 +	 */
 +	if (preferred_console < 0) {
 +		if (newcon->index < 0)
 +			newcon->index = 0;
 +		if (newcon->setup == NULL ||
 +		    newcon->setup(newcon, NULL) == 0) {
 +			newcon->flags |= CON_ENABLED;
 +			if (newcon->device) {
 +				newcon->flags |= CON_CONSDEV;
 +				preferred_console = 0;
 +			}
 +		}
 +	}
 +
 +	/*
 +	 *	See if this console matches one we selected on
 +	 *	the command line.
 +	 */
 +	for (i = 0, c = console_cmdline;
 +	     i < MAX_CMDLINECONSOLES && c->name[0];
 +	     i++, c++) {
 +		if (strcmp(c->name, newcon->name) != 0)
 +			continue;
 +		if (newcon->index >= 0 &&
 +		    newcon->index != c->index)
 +			continue;
 +		if (newcon->index < 0)
 +			newcon->index = c->index;
 +
 +		if (_braille_register_console(newcon, c))
 +			return;
 +
 +		if (newcon->setup &&
 +		    newcon->setup(newcon, console_cmdline[i].options) != 0)
 +			break;
 +		newcon->flags |= CON_ENABLED;
 +		newcon->index = c->index;
 +		if (i == selected_console) {
 +			newcon->flags |= CON_CONSDEV;
 +			preferred_console = selected_console;
 +		}
 +		break;
 +	}
 +
 +	if (!(newcon->flags & CON_ENABLED))
 +		return;
 +
 +	/*
 +	 * If we have a bootconsole, and are switching to a real console,
 +	 * don't print everything out again, since when the boot console, and
 +	 * the real console are the same physical device, it's annoying to
 +	 * see the beginning boot messages twice
 +	 */
 +	if (bcon && ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV))
 +		newcon->flags &= ~CON_PRINTBUFFER;
 +
 +	/*
 +	 *	Put this console in the list - keep the
 +	 *	preferred driver at the head of the list.
 +	 */
 +	console_lock();
 +	if ((newcon->flags & CON_CONSDEV) || console_drivers == NULL) {
 +		newcon->next = console_drivers;
 +		console_drivers = newcon;
 +		if (newcon->next)
 +			newcon->next->flags &= ~CON_CONSDEV;
 +	} else {
 +		newcon->next = console_drivers->next;
 +		console_drivers->next = newcon;
 +	}
 +	if (newcon->flags & CON_PRINTBUFFER) {
 +		/*
 +		 * console_unlock(); will print out the buffered messages
 +		 * for us.
 +		 */
 +		raw_spin_lock_irqsave(&logbuf_lock, flags);
 +		console_seq = syslog_seq;
 +		console_idx = syslog_idx;
 +		console_prev = syslog_prev;
 +		raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +		/*
 +		 * We're about to replay the log buffer.  Only do this to the
 +		 * just-registered console to avoid excessive message spam to
 +		 * the already-registered consoles.
 +		 */
 +		exclusive_console = newcon;
 +	}
 +	console_unlock();
 +	console_sysfs_notify();
 +
 +	/*
 +	 * By unregistering the bootconsoles after we enable the real console
 +	 * we get the "console xxx enabled" message on all the consoles -
 +	 * boot consoles, real consoles, etc - this is to ensure that end
 +	 * users know there might be something in the kernel's log buffer that
 +	 * went to the bootconsole (that they do not see on the real console)
 +	 */
 +	if (bcon &&
 +	    ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) &&
 +	    !keep_bootcon) {
 +		/* we need to iterate through twice, to make sure we print
 +		 * everything out, before we unregister the console(s)
 +		 */
 +		printk(KERN_INFO "console [%s%d] enabled, bootconsole disabled\n",
 +			newcon->name, newcon->index);
 +		for_each_console(bcon)
 +			if (bcon->flags & CON_BOOT)
 +				unregister_console(bcon);
 +	} else {
 +		printk(KERN_INFO "%sconsole [%s%d] enabled\n",
 +			(newcon->flags & CON_BOOT) ? "boot" : "" ,
 +			newcon->name, newcon->index);
 +	}
 +}
 +EXPORT_SYMBOL(register_console);
 +
 +int unregister_console(struct console *console)
 +{
 +        struct console *a, *b;
 +	int res;
 +
 +	res = _braille_unregister_console(console);
 +	if (res)
 +		return res;
 +
 +	res = 1;
 +	console_lock();
 +	if (console_drivers == console) {
 +		console_drivers=console->next;
 +		res = 0;
 +	} else if (console_drivers) {
 +		for (a=console_drivers->next, b=console_drivers ;
 +		     a; b=a, a=b->next) {
 +			if (a == console) {
 +				b->next = a->next;
 +				res = 0;
 +				break;
 +			}
 +		}
 +	}
 +
 +	/*
 +	 * If this isn't the last console and it has CON_CONSDEV set, we
 +	 * need to set it on the next preferred console.
 +	 */
 +	if (console_drivers != NULL && console->flags & CON_CONSDEV)
 +		console_drivers->flags |= CON_CONSDEV;
 +
 +	console_unlock();
 +	console_sysfs_notify();
 +	return res;
 +}
 +EXPORT_SYMBOL(unregister_console);
 +
 +static int __init printk_late_init(void)
 +{
 +	struct console *con;
 +
 +	for_each_console(con) {
 +		if (!keep_bootcon && con->flags & CON_BOOT) {
 +			printk(KERN_INFO "turn off boot console %s%d\n",
 +				con->name, con->index);
 +			unregister_console(con);
 +		}
 +	}
 +	hotcpu_notifier(console_cpu_notify, 0);
 +	return 0;
 +}
 +late_initcall(printk_late_init);
 +
 +#if defined CONFIG_PRINTK
 +/*
 + * Delayed printk version, for scheduler-internal messages:
 + */
 +#define PRINTK_BUF_SIZE		512
 +
 +#define PRINTK_PENDING_WAKEUP	0x01
 +#define PRINTK_PENDING_SCHED	0x02
 +
 +static DEFINE_PER_CPU(int, printk_pending);
 +static DEFINE_PER_CPU(char [PRINTK_BUF_SIZE], printk_sched_buf);
 +
 +static void wake_up_klogd_work_func(struct irq_work *irq_work)
 +{
 +	int pending = __this_cpu_xchg(printk_pending, 0);
 +
 +	if (pending & PRINTK_PENDING_SCHED) {
 +		char *buf = __get_cpu_var(printk_sched_buf);
 +		printk(KERN_WARNING "[sched_delayed] %s", buf);
 +	}
 +
 +	if (pending & PRINTK_PENDING_WAKEUP)
 +		wake_up_interruptible(&log_wait);
 +}
 +
 +static DEFINE_PER_CPU(struct irq_work, wake_up_klogd_work) = {
 +	.func = wake_up_klogd_work_func,
 +	.flags = IRQ_WORK_LAZY,
 +};
 +
 +void wake_up_klogd(void)
 +{
 +	preempt_disable();
 +	if (waitqueue_active(&log_wait)) {
 +		this_cpu_or(printk_pending, PRINTK_PENDING_WAKEUP);
 +		irq_work_queue(&__get_cpu_var(wake_up_klogd_work));
 +	}
 +	preempt_enable();
 +}
 +
 +int printk_sched(const char *fmt, ...)
 +{
 +	unsigned long flags;
 +	va_list args;
 +	char *buf;
 +	int r;
 +
 +	local_irq_save(flags);
 +	buf = __get_cpu_var(printk_sched_buf);
 +
 +	va_start(args, fmt);
 +	r = vsnprintf(buf, PRINTK_BUF_SIZE, fmt, args);
 +	va_end(args);
 +
 +	__this_cpu_or(printk_pending, PRINTK_PENDING_SCHED);
 +	irq_work_queue(&__get_cpu_var(wake_up_klogd_work));
 +	local_irq_restore(flags);
 +
 +	return r;
 +}
 +
 +/*
 + * printk rate limiting, lifted from the networking subsystem.
 + *
 + * This enforces a rate limit: not more than 10 kernel messages
 + * every 5s to make a denial-of-service attack impossible.
 + */
 +DEFINE_RATELIMIT_STATE(printk_ratelimit_state, 5 * HZ, 10);
 +
 +int __printk_ratelimit(const char *func)
 +{
 +	return ___ratelimit(&printk_ratelimit_state, func);
 +}
 +EXPORT_SYMBOL(__printk_ratelimit);
 +
 +/**
 + * printk_timed_ratelimit - caller-controlled printk ratelimiting
 + * @caller_jiffies: pointer to caller's state
 + * @interval_msecs: minimum interval between prints
 + *
 + * printk_timed_ratelimit() returns true if more than @interval_msecs
 + * milliseconds have elapsed since the last time printk_timed_ratelimit()
 + * returned true.
 + */
 +bool printk_timed_ratelimit(unsigned long *caller_jiffies,
 +			unsigned int interval_msecs)
 +{
 +	if (*caller_jiffies == 0
 +			|| !time_in_range(jiffies, *caller_jiffies,
 +					*caller_jiffies
 +					+ msecs_to_jiffies(interval_msecs))) {
 +		*caller_jiffies = jiffies;
 +		return true;
 +	}
 +	return false;
 +}
 +EXPORT_SYMBOL(printk_timed_ratelimit);
 +
 +static DEFINE_SPINLOCK(dump_list_lock);
 +static LIST_HEAD(dump_list);
 +
 +/**
 + * kmsg_dump_register - register a kernel log dumper.
 + * @dumper: pointer to the kmsg_dumper structure
 + *
 + * Adds a kernel log dumper to the system. The dump callback in the
 + * structure will be called when the kernel oopses or panics and must be
 + * set. Returns zero on success and %-EINVAL or %-EBUSY otherwise.
 + */
 +int kmsg_dump_register(struct kmsg_dumper *dumper)
 +{
 +	unsigned long flags;
 +	int err = -EBUSY;
 +
 +	/* The dump callback needs to be set */
 +	if (!dumper->dump)
 +		return -EINVAL;
 +
 +	spin_lock_irqsave(&dump_list_lock, flags);
 +	/* Don't allow registering multiple times */
 +	if (!dumper->registered) {
 +		dumper->registered = 1;
 +		list_add_tail_rcu(&dumper->list, &dump_list);
 +		err = 0;
 +	}
 +	spin_unlock_irqrestore(&dump_list_lock, flags);
 +
 +	return err;
 +}
 +EXPORT_SYMBOL_GPL(kmsg_dump_register);
 +
 +/**
 + * kmsg_dump_unregister - unregister a kmsg dumper.
 + * @dumper: pointer to the kmsg_dumper structure
 + *
 + * Removes a dump device from the system. Returns zero on success and
 + * %-EINVAL otherwise.
 + */
 +int kmsg_dump_unregister(struct kmsg_dumper *dumper)
 +{
 +	unsigned long flags;
 +	int err = -EINVAL;
 +
 +	spin_lock_irqsave(&dump_list_lock, flags);
 +	if (dumper->registered) {
 +		dumper->registered = 0;
 +		list_del_rcu(&dumper->list);
 +		err = 0;
 +	}
 +	spin_unlock_irqrestore(&dump_list_lock, flags);
 +	synchronize_rcu();
 +
 +	return err;
 +}
 +EXPORT_SYMBOL_GPL(kmsg_dump_unregister);
 +
 +static bool always_kmsg_dump;
 +module_param_named(always_kmsg_dump, always_kmsg_dump, bool, S_IRUGO | S_IWUSR);
 +
 +/**
 + * kmsg_dump - dump kernel log to kernel message dumpers.
 + * @reason: the reason (oops, panic etc) for dumping
 + *
 + * Call each of the registered dumper's dump() callback, which can
 + * retrieve the kmsg records with kmsg_dump_get_line() or
 + * kmsg_dump_get_buffer().
 + */
 +void kmsg_dump(enum kmsg_dump_reason reason)
 +{
 +	struct kmsg_dumper *dumper;
 +	unsigned long flags;
 +
 +	if ((reason > KMSG_DUMP_OOPS) && !always_kmsg_dump)
 +		return;
 +
 +	rcu_read_lock();
 +	list_for_each_entry_rcu(dumper, &dump_list, list) {
 +		if (dumper->max_reason && reason > dumper->max_reason)
 +			continue;
 +
 +		/* initialize iterator with data about the stored records */
 +		dumper->active = true;
 +
 +		raw_spin_lock_irqsave(&logbuf_lock, flags);
 +		dumper->cur_seq = clear_seq;
 +		dumper->cur_idx = clear_idx;
 +		dumper->next_seq = log_next_seq;
 +		dumper->next_idx = log_next_idx;
 +		raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +
 +		/* invoke dumper which will iterate over records */
 +		dumper->dump(dumper, reason);
 +
 +		/* reset iterator */
 +		dumper->active = false;
 +	}
 +	rcu_read_unlock();
 +}
 +
 +/**
 + * kmsg_dump_get_line_nolock - retrieve one kmsg log line (unlocked version)
 + * @dumper: registered kmsg dumper
 + * @syslog: include the "<4>" prefixes
 + * @line: buffer to copy the line to
 + * @size: maximum size of the buffer
 + * @len: length of line placed into buffer
 + *
 + * Start at the beginning of the kmsg buffer, with the oldest kmsg
 + * record, and copy one record into the provided buffer.
 + *
 + * Consecutive calls will return the next available record moving
 + * towards the end of the buffer with the youngest messages.
 + *
 + * A return value of FALSE indicates that there are no more records to
 + * read.
 + *
 + * The function is similar to kmsg_dump_get_line(), but grabs no locks.
 + */
 +bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog,
 +			       char *line, size_t size, size_t *len)
 +{
 +	struct printk_log *msg;
 +	size_t l = 0;
 +	bool ret = false;
 +
 +	if (!dumper->active)
 +		goto out;
 +
 +	if (dumper->cur_seq < log_first_seq) {
 +		/* messages are gone, move to first available one */
 +		dumper->cur_seq = log_first_seq;
 +		dumper->cur_idx = log_first_idx;
 +	}
 +
 +	/* last entry */
 +	if (dumper->cur_seq >= log_next_seq)
 +		goto out;
 +
 +	msg = log_from_idx(dumper->cur_idx);
 +	l = msg_print_text(msg, 0, syslog, line, size);
 +
 +	dumper->cur_idx = log_next(dumper->cur_idx);
 +	dumper->cur_seq++;
 +	ret = true;
 +out:
 +	if (len)
 +		*len = l;
 +	return ret;
 +}
 +
 +/**
 + * kmsg_dump_get_line - retrieve one kmsg log line
 + * @dumper: registered kmsg dumper
 + * @syslog: include the "<4>" prefixes
 + * @line: buffer to copy the line to
 + * @size: maximum size of the buffer
 + * @len: length of line placed into buffer
 + *
 + * Start at the beginning of the kmsg buffer, with the oldest kmsg
 + * record, and copy one record into the provided buffer.
 + *
 + * Consecutive calls will return the next available record moving
 + * towards the end of the buffer with the youngest messages.
 + *
 + * A return value of FALSE indicates that there are no more records to
 + * read.
 + */
 +bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog,
 +			char *line, size_t size, size_t *len)
 +{
 +	unsigned long flags;
 +	bool ret;
 +
 +	raw_spin_lock_irqsave(&logbuf_lock, flags);
 +	ret = kmsg_dump_get_line_nolock(dumper, syslog, line, size, len);
 +	raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +
 +	return ret;
 +}
 +EXPORT_SYMBOL_GPL(kmsg_dump_get_line);
 +
 +/**
 + * kmsg_dump_get_buffer - copy kmsg log lines
 + * @dumper: registered kmsg dumper
 + * @syslog: include the "<4>" prefixes
 + * @buf: buffer to copy the line to
 + * @size: maximum size of the buffer
 + * @len: length of line placed into buffer
 + *
 + * Start at the end of the kmsg buffer and fill the provided buffer
 + * with as many of the the *youngest* kmsg records that fit into it.
 + * If the buffer is large enough, all available kmsg records will be
 + * copied with a single call.
 + *
 + * Consecutive calls will fill the buffer with the next block of
 + * available older records, not including the earlier retrieved ones.
 + *
 + * A return value of FALSE indicates that there are no more records to
 + * read.
 + */
 +bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
 +			  char *buf, size_t size, size_t *len)
 +{
 +	unsigned long flags;
 +	u64 seq;
 +	u32 idx;
 +	u64 next_seq;
 +	u32 next_idx;
 +	enum log_flags prev;
 +	size_t l = 0;
 +	bool ret = false;
 +
 +	if (!dumper->active)
 +		goto out;
 +
 +	raw_spin_lock_irqsave(&logbuf_lock, flags);
 +	if (dumper->cur_seq < log_first_seq) {
 +		/* messages are gone, move to first available one */
 +		dumper->cur_seq = log_first_seq;
 +		dumper->cur_idx = log_first_idx;
 +	}
 +
 +	/* last entry */
 +	if (dumper->cur_seq >= dumper->next_seq) {
 +		raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +		goto out;
 +	}
 +
 +	/* calculate length of entire buffer */
 +	seq = dumper->cur_seq;
 +	idx = dumper->cur_idx;
 +	prev = 0;
 +	while (seq < dumper->next_seq) {
 +		struct printk_log *msg = log_from_idx(idx);
 +
 +		l += msg_print_text(msg, prev, true, NULL, 0);
 +		idx = log_next(idx);
 +		seq++;
 +		prev = msg->flags;
 +	}
 +
 +	/* move first record forward until length fits into the buffer */
 +	seq = dumper->cur_seq;
 +	idx = dumper->cur_idx;
 +	prev = 0;
 +	while (l > size && seq < dumper->next_seq) {
 +		struct printk_log *msg = log_from_idx(idx);
 +
 +		l -= msg_print_text(msg, prev, true, NULL, 0);
 +		idx = log_next(idx);
 +		seq++;
 +		prev = msg->flags;
 +	}
 +
 +	/* last message in next interation */
 +	next_seq = seq;
 +	next_idx = idx;
 +
 +	l = 0;
 +	prev = 0;
 +	while (seq < dumper->next_seq) {
 +		struct printk_log *msg = log_from_idx(idx);
 +
 +		l += msg_print_text(msg, prev, syslog, buf + l, size - l);
 +		idx = log_next(idx);
 +		seq++;
 +		prev = msg->flags;
 +	}
 +
 +	dumper->next_seq = next_seq;
 +	dumper->next_idx = next_idx;
 +	ret = true;
 +	raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +out:
 +	if (len)
 +		*len = l;
 +	return ret;
 +}
 +EXPORT_SYMBOL_GPL(kmsg_dump_get_buffer);
 +
 +/**
 + * kmsg_dump_rewind_nolock - reset the interator (unlocked version)
 + * @dumper: registered kmsg dumper
 + *
 + * Reset the dumper's iterator so that kmsg_dump_get_line() and
 + * kmsg_dump_get_buffer() can be called again and used multiple
 + * times within the same dumper.dump() callback.
 + *
 + * The function is similar to kmsg_dump_rewind(), but grabs no locks.
 + */
 +void kmsg_dump_rewind_nolock(struct kmsg_dumper *dumper)
 +{
 +	dumper->cur_seq = clear_seq;
 +	dumper->cur_idx = clear_idx;
 +	dumper->next_seq = log_next_seq;
 +	dumper->next_idx = log_next_idx;
 +}
 +
 +/**
 + * kmsg_dump_rewind - reset the interator
 + * @dumper: registered kmsg dumper
 + *
 + * Reset the dumper's iterator so that kmsg_dump_get_line() and
 + * kmsg_dump_get_buffer() can be called again and used multiple
 + * times within the same dumper.dump() callback.
 + */
 +void kmsg_dump_rewind(struct kmsg_dumper *dumper)
 +{
 +	unsigned long flags;
 +
 +	raw_spin_lock_irqsave(&logbuf_lock, flags);
 +	kmsg_dump_rewind_nolock(dumper);
 +	raw_spin_unlock_irqrestore(&logbuf_lock, flags);
 +}
 +EXPORT_SYMBOL_GPL(kmsg_dump_rewind);
 +
 +static char dump_stack_arch_desc_str[128];
 +
 +/**
 + * dump_stack_set_arch_desc - set arch-specific str to show with task dumps
 + * @fmt: printf-style format string
 + * @...: arguments for the format string
 + *
 + * The configured string will be printed right after utsname during task
 + * dumps.  Usually used to add arch-specific system identifiers.  If an
 + * arch wants to make use of such an ID string, it should initialize this
 + * as soon as possible during boot.
 + */
 +void __init dump_stack_set_arch_desc(const char *fmt, ...)
 +{
 +	va_list args;
 +
 +	va_start(args, fmt);
 +	vsnprintf(dump_stack_arch_desc_str, sizeof(dump_stack_arch_desc_str),
 +		  fmt, args);
 +	va_end(args);
 +}
 +
 +/**
 + * dump_stack_print_info - print generic debug info for dump_stack()
 + * @log_lvl: log level
 + *
 + * Arch-specific dump_stack() implementations can use this function to
 + * print out the same debug information as the generic dump_stack().
 + */
 +void dump_stack_print_info(const char *log_lvl)
 +{
 +	printk("%sCPU: %d PID: %d Comm: %.20s %s %s %.*s\n",
 +	       log_lvl, raw_smp_processor_id(), current->pid, current->comm,
 +	       print_tainted(), init_utsname()->release,
 +	       (int)strcspn(init_utsname()->version, " "),
 +	       init_utsname()->version);
 +
 +	if (dump_stack_arch_desc_str[0] != '\0')
 +		printk("%sHardware name: %s\n",
 +		       log_lvl, dump_stack_arch_desc_str);
 +
 +	print_worker_info(log_lvl, current);
 +}
 +
 +/**
 + * show_regs_print_info - print generic debug info for show_regs()
 + * @log_lvl: log level
 + *
 + * show_regs() implementations can use this function to print out generic
 + * debug information.
 + */
 +void show_regs_print_info(const char *log_lvl)
 +{
 +	dump_stack_print_info(log_lvl);
 +
 +	printk("%stask: %p ti: %p task.ti: %p\n",
 +	       log_lvl, current, current_thread_info(),
 +	       task_thread_info(current));
 +}
 +
 +#endif

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-12-15  7:08 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-12-15  7:08 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Ingo Molnar

Hi Jens,

Today's linux-next merge of the block tree got a conflict in fs/bio.c
between commit 0bfc24559d7945506184d86739fe365a181f06b7 ("blktrace: port
to tracepoints, update") from the ftrace tree and commit
18e08407d87bed3a9c4205e53bb16fe36088a521 ("bio: allow individual slabs in
the bio_set") from the block tree.

Just an overlapping addition/removal.  I fixed it up (see below) and can
carry the fix as necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc fs/bio.c
index df99c88,3bd633d..0000000
--- a/fs/bio.c
+++ b/fs/bio.c
@@@ -26,12 -26,13 +26,16 @@@
  #include <linux/mempool.h>
  #include <linux/workqueue.h>
  #include <linux/blktrace_api.h>
 +#include <trace/block.h>
  #include <scsi/sg.h>		/* for struct sg_iovec */
  
 +DEFINE_TRACE(block_split);
 +
- static struct kmem_cache *bio_slab __read_mostly;
+ /*
+  * Test patch to inline a certain number of bi_io_vec's inside the bio
+  * itself, to shrink a bio data allocation from two mempool calls to one
+  */
+ #define BIO_INLINE_VECS		4
  
  static mempool_t *bio_split_pool __read_mostly;
  

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-11-07  6:14 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-11-07  6:14 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Alan Stern

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
block/blk-timeout.c between commit
7838c15b8dd18e78a523513749e5b54bda07b0cb ("Block: use round_jiffies_up
()") from Linus' tree and commit 514054ea03191f529c6783bc0048e173e5194a27
("block: optimizations in blk_rq_timed_out_timer()") from the block tree.

Just a context change.  I fixed it up (see below) and assume it will be
fixed in your tree shortly.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc block/blk-timeout.c
index 69185ea,151790e..0000000
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@@ -126,16 -133,19 +126,19 @@@ void blk_rq_timed_out_timer(unsigned lo
  			if (blk_mark_rq_complete(rq))
  				continue;
  			blk_rq_timed_out(rq);
+ 		} else {
+ 			if (!next || time_after(next, rq->deadline))
+ 				next = rq->deadline;
  		}
- 		if (!next_set) {
- 			next = rq->deadline;
- 			next_set = 1;
- 		} else if (time_after(next, rq->deadline))
- 			next = rq->deadline;
  	}
  
- 	if (next_set && !list_empty(&q->timeout_list))
+ 	/*
+ 	 * next can never be 0 here with the list non-empty, since we always
+ 	 * bump ->deadline to 1 so we can detect if the timer was ever added or not.
+ 	 * See comment in blk_add_timer()
+ 	 */
+ 	if (next)
 -		mod_timer(&q->timeout, round_jiffies(next));
 +		mod_timer(&q->timeout, round_jiffies_up(next));
  
  	spin_unlock_irqrestore(q->queue_lock, flags);
  }

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-11-07  6:10 Stephen Rothwell
  2008-11-07  9:50 ` Jens Axboe
  0 siblings, 1 reply; 34+ messages in thread
From: Stephen Rothwell @ 2008-11-07  6:10 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Tejun Heo, Arnaldo Carvalho de Melo

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
block/elevator.c between commit 2920ebbd65f3e80c318adf5191ac0987142bda80
("block: add timer on blkdev_dequeue_request() not elv_next_request()")
from Linus' tree and commit 8b3806453dd25d15a7ca7d537124af14ba8546bc
("blktrace: port to tracepoints") from the block tree.

Just a context change.  I fixed it up (see below) and assume it will be
fixed in your tree soon.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc block/elevator.c
index 9ac82dd,e09183b..0000000
--- a/block/elevator.c
+++ b/block/elevator.c
@@@ -772,7 -787,13 +787,7 @@@ struct request *elv_next_request(struc
  			 * not be passed by new incoming requests
  			 */
  			rq->cmd_flags |= REQ_STARTED;
- 			blk_add_trace_rq(q, rq, BLK_TA_ISSUE);
+ 			trace_block_rq_issue(q, rq);
 -
 -			/*
 -			 * We are now handing the request to the hardware,
 -			 * add the timeout handler
 -			 */
 -			blk_add_timer(rq);
  		}
  
  		if (!q->boundary_rq || q->boundary_rq == rq) {

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-10-15  7:40 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-10-15  7:40 UTC (permalink / raw)
  To: Jens Axboe
  Cc: linux-next, Alexey Dobriyan, David S. Miller, Ingo Molnar, Andrew Morton

[-- Attachment #1: Type: text/plain, Size: 579 bytes --]

Hi Jens,

Today's linux-next merge of the block tree got conflicts in
include/linux/interrupt.h and kernel/softirq.c between commit
978b0116cd225682a29e3d1d5010319bf2de32c2 ("softirq: allocate less
vectors") from the tip-core tree and commit
c065c007d92de6ed071c9939bd1982d3a35ebd0f ("softirq: Define and use
NR_SOFTIRQ") from the block tree.

These two commits seem to do the same thing.  I have used the latter as
other things in the block tree depend on it.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-09-05  6:12 Stephen Rothwell
  2008-09-05  6:22 ` Jens Axboe
  0 siblings, 1 reply; 34+ messages in thread
From: Stephen Rothwell @ 2008-09-05  6:12 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, David Woodhouse, Mike Christie, James Bottomley

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
include/linux/bio.h and include/linux/blkdev.h between commit
81449f3f2013d92ec3bcb9d2c1877ce3140d2271 ("[SCSI] block: separate
failfast into multiple bits") from the scsi tree and commit
5d112a624058caabe5b570d2c9827bce82c18be1 ("Add 'discard' request
handling") from the block tree.

Overlapping changes/additions to some bit definitions.  I have fixed it
up as best I can (see below) and can carry the fix.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc include/linux/bio.h
index 425a4ec,7af373f..0000000
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@@ -147,20 -125,18 +125,22 @@@ struct bio 
   * bit 0 -- read (not set) or write (set)
   * bit 1 -- rw-ahead when set
   * bit 2 -- barrier
 - * bit 3 -- fail fast, don't want low level driver retries
 - * bit 4 -- synchronous I/O hint: the block layer will unplug immediately
 - * bit 5 -- metadata request
 - * bit 6 -- discard sectors
 + * bit 3 -- synchronous I/O hint: the block layer will unplug immediately
 + * bit 4 -- meta data
 + * bit 5 -- fail fast device errors
 + * bit 6 -- fail fast transport errors
 + * bit 7 -- fail fast driver errors
++ * bit 8 -- discard sectors
   */
- #define BIO_RW				0
- #define BIO_RW_AHEAD			1
 -#define BIO_RW		0	/* Must match RW in req flags (blkdev.h) */
 -#define BIO_RW_AHEAD	1	/* Must match FAILFAST in req flags */
 -#define BIO_RW_BARRIER	2
 -#define BIO_RW_FAILFAST	3
 -#define BIO_RW_SYNC	4
 -#define BIO_RW_META	5
 -#define BIO_RW_DISCARD	6
++#define BIO_RW				0	/* Must match RW in req flags (blkdev.h) */
++#define BIO_RW_AHEAD			1	/* Must match FAILFAST in req flags */
 +#define BIO_RW_BARRIER			2
 +#define BIO_RW_SYNC			3
 +#define BIO_RW_META			4
 +#define BIO_RW_FAILFAST_DEV		5
 +#define BIO_RW_FAILFAST_TRANSPORT	6
 +#define BIO_RW_FAILFAST_DRIVER		7
++#define BIO_RW_DISCARD			8
  
  /*
   * upper 16 bits of bi_rw define the io priority of this bio
@@@ -187,13 -163,11 +167,14 @@@
  #define bio_sectors(bio)	((bio)->bi_size >> 9)
  #define bio_barrier(bio)	((bio)->bi_rw & (1 << BIO_RW_BARRIER))
  #define bio_sync(bio)		((bio)->bi_rw & (1 << BIO_RW_SYNC))
 -#define bio_failfast(bio)	((bio)->bi_rw & (1 << BIO_RW_FAILFAST))
 +#define bio_failfast_dev(bio)	((bio)->bi_rw &	(1 << BIO_RW_FAILFAST_DEV))
 +#define bio_failfast_transport(bio)	\
 +	((bio)->bi_rw & (1 << BIO_RW_FAILFAST_TRANSPORT))
 +#define bio_failfast_driver(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST_DRIVER))
  #define bio_rw_ahead(bio)	((bio)->bi_rw & (1 << BIO_RW_AHEAD))
  #define bio_rw_meta(bio)	((bio)->bi_rw & (1 << BIO_RW_META))
- #define bio_empty_barrier(bio)	(bio_barrier(bio) && !(bio)->bi_size)
+ #define bio_discard(bio)	((bio)->bi_rw & (1 << BIO_RW_DISCARD))
+ #define bio_empty_barrier(bio)	(bio_barrier(bio) && !bio_has_data(bio) && !bio_discard(bio))
  
  static inline unsigned int bio_cur_sectors(struct bio *bio)
  {
diff --cc include/linux/blkdev.h
index 2d8d90c,4cd8caa..0000000
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@@ -88,9 -86,8 +86,10 @@@ enum 
   */
  enum rq_flag_bits {
  	__REQ_RW,		/* not set, read. set, write */
 -	__REQ_FAILFAST,		/* no low level driver retries */
 +	__REQ_FAILFAST_DEV,	/* no driver retries of device errors */
 +	__REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
 +	__REQ_FAILFAST_DRIVER,	/* no driver retries of driver errors */
+ 	__REQ_DISCARD,		/* request to discard sectors */
  	__REQ_SORTED,		/* elevator knows about this request */
  	__REQ_SOFTBARRIER,	/* may not be passed by ioscheduler */
  	__REQ_HARDBARRIER,	/* may not be passed by drive either */
@@@ -113,9 -110,8 +112,10 @@@
  };
  
  #define REQ_RW		(1 << __REQ_RW)
 +#define REQ_FAILFAST_DEV	(1 << __REQ_FAILFAST_DEV)
 +#define REQ_FAILFAST_TRANSPORT	(1 << __REQ_FAILFAST_TRANSPORT)
 +#define REQ_FAILFAST_DRIVER	(1 << __REQ_FAILFAST_DRIVER)
+ #define REQ_DISCARD	(1 << __REQ_DISCARD)
 -#define REQ_FAILFAST	(1 << __REQ_FAILFAST)
  #define REQ_SORTED	(1 << __REQ_SORTED)
  #define REQ_SOFTBARRIER	(1 << __REQ_SOFTBARRIER)
  #define REQ_HARDBARRIER	(1 << __REQ_HARDBARRIER)
@@@ -537,15 -535,10 +539,15 @@@ enum 
  #define blk_special_request(rq)	((rq)->cmd_type == REQ_TYPE_SPECIAL)
  #define blk_sense_request(rq)	((rq)->cmd_type == REQ_TYPE_SENSE)
  
 -#define blk_noretry_request(rq)	((rq)->cmd_flags & REQ_FAILFAST)
 +#define blk_failfast_dev(rq)	((rq)->cmd_flags & REQ_FAILFAST_DEV)
 +#define blk_failfast_transport(rq) ((rq)->cmd_flags & REQ_FAILFAST_TRANSPORT)
 +#define blk_failfast_driver(rq)	((rq)->cmd_flags & REQ_FAILFAST_DRIVER)
 +#define blk_noretry_request(rq)	(blk_failfast_dev(rq) ||	\
 +				 blk_failfast_transport(rq) ||	\
 +				 blk_failfast_driver(rq))
  #define blk_rq_started(rq)	((rq)->cmd_flags & REQ_STARTED)
  
- #define blk_account_rq(rq)	(blk_rq_started(rq) && blk_fs_request(rq))
+ #define blk_account_rq(rq)	(blk_rq_started(rq) && (blk_fs_request(rq) || blk_discard_rq(rq))) 
  
  #define blk_pm_suspend_request(rq)	((rq)->cmd_type == REQ_TYPE_PM_SUSPEND)
  #define blk_pm_resume_request(rq)	((rq)->cmd_type == REQ_TYPE_PM_RESUME)

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-09-03  5:58 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-09-03  5:58 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, FUJITA Tomonori, Tejun Heo

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
block/cmd-filter.c between commit
bb23b431db7405f6d79f989ad0236bf6428ba1cb ("remove blk_register_filter and
blk_unregister_filter in gendisk") from Linus' tree and commit
d68103f74be7c93f36705651a2115da177308751 ("block: move holder_dir from
disk to part0") from the block tree.

Just a trivial add/removal clash.  I fixed it up (see below) and can
carry the fix while necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc block/cmd-filter.c
index 228b644,df450d6..0000000
--- a/block/cmd-filter.c
+++ b/block/cmd-filter.c
@@@ -230,6 -225,4 +226,5 @@@ void blk_unregister_filter(struct gendi
  	struct blk_cmd_filter *filter = &disk->queue->cmd_filter;
  
  	kobject_put(&filter->kobj);
- 	kobject_put(disk->holder_dir->parent);
  }
 +EXPORT_SYMBOL(blk_unregister_filter);

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-09-03  5:55 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-09-03  5:55 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Tejun Heo, FUJITA Tomonori

Hi Jens,

Today's linux-next merge of the block tree got a conflicts in
block/genhd.c between commits bb23b431db7405f6d79f989ad0236bf6428ba1cb
("remove blk_register_filter and blk_unregister_filter in gendisk") and
ddef43a843f620c6742a06633739887a901ec06b ("block: restore original
behavior of /proc/partition when there's no partition") from Linus' tree
and commits 8d5ceff5828d044eeb93656093f50e6f522f9d71 ("block: implement
and use {disk|part}_to_dev()") and
f21bb156d79de8404a0e04eb311141a01b459c92 ("block: use class_dev_iterator
instead of class_for_each_device()") from the block tree.

I fixed them up (see below) and can carry the fixes while needed.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc block/genhd.c
index c114a43,9c27e15..0000000
--- a/block/genhd.c
+++ b/block/genhd.c
@@@ -183,17 -484,41 +484,40 @@@ static int exact_lock(dev_t devt, void 
  void add_disk(struct gendisk *disk)
  {
  	struct backing_dev_info *bdi;
+ 	dev_t devt;
  	int retval;
  
+ 	/* minors == 0 indicates to use ext devt from part0 and should
+ 	 * be accompanied with EXT_DEVT flag.  Make sure all
+ 	 * parameters make sense.
+ 	 */
+ 	WARN_ON(disk->minors && !(disk->major || disk->first_minor));
+ 	WARN_ON(!disk->minors && !(disk->flags & GENHD_FL_EXT_DEVT));
+ 
  	disk->flags |= GENHD_FL_UP;
- 	blk_register_region(MKDEV(disk->major, disk->first_minor),
- 			    disk->minors, NULL, exact_match, exact_lock, disk);
+ 
+ 	retval = blk_alloc_devt(&disk->part0, &devt);
+ 	if (retval) {
+ 		WARN_ON(1);
+ 		return;
+ 	}
+ 	disk_to_dev(disk)->devt = devt;
+ 
+ 	/* ->major and ->first_minor aren't supposed to be
+ 	 * dereferenced from here on, but set them just in case.
+ 	 */
+ 	disk->major = MAJOR(devt);
+ 	disk->first_minor = MINOR(devt);
+ 
+ 	blk_register_region(disk_devt(disk), disk->minors, NULL,
+ 			    exact_match, exact_lock, disk);
  	register_disk(disk);
  	blk_register_queue(disk);
 -	blk_register_filter(disk);
  
  	bdi = &disk->queue->backing_dev_info;
- 	bdi_register_dev(bdi, MKDEV(disk->major, disk->first_minor));
- 	retval = sysfs_create_link(&disk->dev.kobj, &bdi->dev->kobj, "bdi");
+ 	bdi_register_dev(bdi, disk_devt(disk));
+ 	retval = sysfs_create_link(&disk_to_dev(disk)->kobj, &bdi->dev->kobj,
+ 				   "bdi");
  	WARN_ON(retval);
  }
  
@@@ -202,11 -527,11 +526,10 @@@ EXPORT_SYMBOL(del_gendisk);	/* in parti
  
  void unlink_gendisk(struct gendisk *disk)
  {
- 	sysfs_remove_link(&disk->dev.kobj, "bdi");
 -	blk_unregister_filter(disk);
+ 	sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");
  	bdi_unregister(&disk->queue->backing_dev_info);
  	blk_unregister_queue(disk);
- 	blk_unregister_region(MKDEV(disk->major, disk->first_minor),
- 			      disk->minors);
+ 	blk_unregister_region(disk_devt(disk), disk->minors);
  }
  
  /**
@@@ -319,51 -683,37 +681,48 @@@ static void *disk_seqf_next(struct seq_
  	return NULL;
  }
  
- static int find_next(struct device *dev, void *data)
+ static void disk_seqf_stop(struct seq_file *seqf, void *v)
  {
- 	if (dev->type == &disk_type)
- 		return 1;
- 	return 0;
- }
+ 	struct class_dev_iter *iter = seqf->private;
  
- static void *part_next(struct seq_file *part, void *v, loff_t *pos)
- {
- 	struct gendisk *gp = v;
- 	struct device *dev;
- 	++*pos;
- 	dev = class_find_device(&block_class, &gp->dev, NULL, find_next);
- 	if (dev) {
- 		put_device(dev);
- 		return dev_to_disk(dev);
+ 	/* stop is called even after start failed :-( */
+ 	if (iter) {
+ 		class_dev_iter_exit(iter);
+ 		kfree(iter);
  	}
- 	return NULL;
  }
  
- static void part_stop(struct seq_file *part, void *v)
+ static void *show_partition_start(struct seq_file *seqf, loff_t *pos)
  {
- 	mutex_unlock(&block_class_lock);
+ 	static void *p;
+ 
+ 	p = disk_seqf_start(seqf, pos);
+ 	if (!IS_ERR(p) && p)
+ 		seq_puts(seqf, "major   minor   #blocks  name\n\n");
+ 	return p;
  }
  
- static int show_partition(struct seq_file *part, void *v)
+ static int show_partition(struct seq_file *seqf, void *v)
  {
  	struct gendisk *sgp = v;
- 	int n;
+ 	struct disk_part_iter piter;
+ 	struct hd_struct *part;
  	char buf[BDEVNAME_SIZE];
  
 +	/*
 +	 * Print header if start told us to do.  This is to preserve
 +	 * the original behavior of not printing header if no
 +	 * partition exists.  This hackery will be removed later with
 +	 * class iteration clean up.
 +	 */
 +	if (part->private) {
 +		seq_puts(part, "major minor  #blocks  name\n\n");
 +		part->private = NULL;
 +	}
 +
  	/* Don't show non-partitionable removeable devices or empty devices */
- 	if (!get_capacity(sgp) ||
- 			(sgp->minors == 1 && (sgp->flags & GENHD_FL_REMOVABLE)))
+ 	if (!get_capacity(sgp) || (!disk_partitionable(sgp) &&
+ 				   (sgp->flags & GENHD_FL_REMOVABLE)))
  		return 0;
  	if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
  		return 0;

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-09-02  6:06 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-09-02  6:06 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Ananth N Mavinakayanahalli, Tejun Heo

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
lib/Kconfig.debug between commits
94a97a3018e55a27d1c29e011b3c38fee01a967f ("Move backtrace selftests to
tests/") and 0f6add4bafdbff7a822e37dec0436e2392864d9a ("Move lkdtm to
tests/") from the tests tree and the three commits dealing with
CONFIG_DEBUG_BLOCK_EXT_DEVT from the block tree.

Just overlapping adds/removes.  I fixed it up (see below) and can carry
the fix.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc lib/Kconfig.debug
index f62c706,2a50e95..0000000
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@@ -572,6 -624,44 +572,28 @@@ config RCU_CPU_STAL
  
  	  Say N if you are unsure.
  
+ config DEBUG_BLOCK_EXT_DEVT
+         bool "Force extended block device numbers and spread them"
+ 	depends on DEBUG_KERNEL
+ 	depends on BLOCK
+ 	default n
+ 	help
+ 	  Conventionally, block device numbers are allocated from
+ 	  predetermined contiguous area.  However, extended block area
+ 	  may introduce non-contiguous block device numbers.  This
+ 	  option forces most block device numbers to be allocated from
+ 	  the extended space and spreads them to discover kernel or
+ 	  userland code paths which assume predetermined contiguous
+ 	  device number allocation.
+ 
+ 	  Note that turning on this debug option shuffles all the
+ 	  device numbers for all IDE and SCSI devices including libata
+ 	  ones, so root partition specified using device number
+ 	  directly (via rdev or root=MAJ:MIN) won't work anymore.
+ 	  Textual device names (root=/dev/sdXn) will continue to work.
+ 
+ 	  Say N if you are unsure.
+ 
 -config LKDTM
 -	tristate "Linux Kernel Dump Test Tool Module"
 -	depends on DEBUG_KERNEL
 -	depends on KPROBES
 -	depends on BLOCK
 -	default n
 -	help
 -	This module enables testing of the different dumping mechanisms by
 -	inducing system failures at predefined crash points.
 -	If you don't need it: say N
 -	Choose M here to compile this code as a module. The module will be
 -	called lkdtm.
 -
 -	Documentation on how to use the module can be found in
 -	drivers/misc/lkdtm.c
 -
  config FAULT_INJECTION
  	bool "Fault-injection framework"
  	depends on DEBUG_KERNEL

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-09-02  5:59 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-09-02  5:59 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Mike Anderson, Kiyoshi Ueda, Alasdair G Kergon

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
drivers/md/dm-mpath.c between commit
a51365f80fbb8b5152d1655581f93704dd989f86
("dm-mpath-remove-is_active-from-struct-dm_path") from the device-mapper
tree and commit 5ee80e583691a8d2012384d380afdff15dd28c8a ("dm: Call
blk_abort_queue on failed paths") from the block tree.

Just changes in context.  I fixed it up (see below) and can carry the
patch.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc drivers/md/dm-mpath.c
index 1a62196,2e16ea9..0000000
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@@ -122,8 -123,10 +124,10 @@@ static struct pgpath *alloc_pgpath(void
  {
  	struct pgpath *pgpath = kzalloc(sizeof(*pgpath), GFP_KERNEL);
  
- 	if (pgpath)
+ 	if (pgpath) {
 -		pgpath->path.is_active = 1;
 +		pgpath->is_active = 1;
+ 		INIT_WORK(&pgpath->deactivate_path, deactivate_path);
+ 	}
  
  	return pgpath;
  }

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-08-28  5:30 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-08-28  5:30 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Tejun Heo, FUJITA Tomonori

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
include/linux/genhd.h between commit
abf5439370491dd6fbb4fe1a7939680d2a9bc9d4 ("block: move cmdfilter from
gendisk to request_queue") from Linus' tree (which also exists in the
block tree) and commit 53b83963cc042f14b9773a1cee5a831799f6fd1a ("block:
make partition array dynamic") from the block tree.

It looks as though the latter patch has readded some bits that were
moved to include/linux/blkdev.h by the former patch.  I fixed it up (see
below).
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc include/linux/genhd.h
index be4f5e5,206cdf9..0000000
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@@ -108,9 -115,27 +115,18 @@@ struct hd_struct 
  #define GENHD_FL_CD				8
  #define GENHD_FL_UP				16
  #define GENHD_FL_SUPPRESS_PARTITION_INFO	32
- #define GENHD_FL_FAIL				64
+ #define GENHD_FL_EXT_DEVT			64 /* allow extended devt */
+ 
 -#define BLK_SCSI_MAX_CMDS	(256)
 -#define BLK_SCSI_CMD_PER_LONG	(BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
 -
 -struct blk_scsi_cmd_filter {
 -	unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
 -	unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
 -	struct kobject kobj;
 -};
 -
+ struct disk_part_tbl {
+ 	struct rcu_head rcu_head;
+ 	int len;
+ 	struct hd_struct *part[];
+ };
  
  struct gendisk {
+ 	/* major, first_minor and minors are input parameters only,
+ 	 * don't use directly.  Use disk_devt() and disk_max_parts().
+ 	 */
  	int major;			/* major number of driver */
  	int first_minor;
  	int minors;                     /* maximum number of minors, =1 for

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-08-27  5:48 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-08-27  5:48 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Tejun Heo, Bartlomiej Zolnierkiewicz

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
drivers/ide/ide-disk.c between commits
be86ba965ac551f6a0e22ba0867b706a52c0c4e7 ("ide-disk: move /proc handling
to ide-disk_proc.c"), 71f28011298d2aee36ab3340572bb6b1fa9868a0
("ide-disk: move all ioctl handling to ide-disk_ioctl.c") and
2c01090494d8c4d3bc02c4a578005d44df55000c ("ide: add device flags") from
the ide tree and several commits from the block tree.

I fixed it up as best I could (see below) and will carry the fix.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc drivers/ide/ide-disk.c
index 8e9191f,e6776c4..0000000
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@@ -39,8 -41,20 +39,14 @@@
  #include <asm/io.h>
  #include <asm/div64.h>
  
 +#include "ide-disk.h"
 +
+ #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
+ #define IDE_DISK_MINORS		(1 << PARTN_BITS)
+ #else
+ #define IDE_DISK_MINORS		0
+ #endif
+ 
 -struct ide_disk_obj {
 -	ide_drive_t	*drive;
 -	ide_driver_t	*driver;
 -	struct gendisk	*disk;
 -	struct kref	kref;
 -	unsigned int	openers;	/* protected by BKL for now */
 -};
 -
  static DEFINE_MUTEX(idedisk_ref_mutex);
  
  #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
@@@ -950,19 -1190,19 +955,20 @@@ static int ide_disk_probe(ide_drive_t *
  	drive->driver_data = idkp;
  
  	idedisk_setup(drive);
 -	if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
 +	if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
 +	    (drive->head == 0 || drive->head > 16)) {
  		printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
  			drive->name, drive->head);
 -		drive->attach = 0;
 +		drive->dev_flags &= ~IDE_DFLAG_ATTACH;
  	} else
 -		drive->attach = 1;
 +		drive->dev_flags |= IDE_DFLAG_ATTACH;
  
- 	g->minors = 1 << PARTN_BITS;
+ 	g->minors = IDE_DISK_MINORS;
  	g->driverfs_dev = &drive->gendev;
+ 	g->flags |= GENHD_FL_EXT_DEVT;
 -	if (drive->removable)
 +	if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
- 		g->flags = GENHD_FL_REMOVABLE;
+ 		g->flags |= GENHD_FL_REMOVABLE;
 -	set_capacity(g, idedisk_capacity(drive));
 +	set_capacity(g, ide_disk_capacity(drive));
  	g->fops = &idedisk_ops;
  	add_disk(g);
  	return 0;

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-08-27  5:47 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-08-27  5:47 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Ananth N Mavinakayanahalli

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
lib/Kconfig.debug between commits
0f6add4bafdbff7a822e37dec0436e2392864d9a ("Move lkdtm to tests/") and 94a97a3018e55a27d1c29e011b3c38fee01a967f ("Move backtrace selftests to
tests/") from the test tree and commit
3e5ba59bbab878f60b8b87004ac55a464bddc819 ("block: implement
CONFIG_DEBUG_BLOCK_EXT_DEVT") from the block tree.

Just overlapping add/removes.  I fixed it up (see below) and can carry
the fix.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

diff --cc lib/Kconfig.debug
index f62c706,1bc3c07..0000000
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@@ -572,6 -624,38 +572,22 @@@ config RCU_CPU_STAL
  
  	  Say N if you are unsure.
  
+ config DEBUG_BLOCK_EXT_DEVT
+         bool "Force extended block device numbers and spread them"
+ 	depends on DEBUG_KERNEL
+ 	depends on BLOCK
+ 	default y
+ 	help
+ 	  Conventionally, block device numbers are allocated from
+ 	  predetermined contiguous area.  However, extended block area
+ 	  may introduce non-contiguous block device numbers.  This
+ 	  option forces most block device numbers to be allocated from
+ 	  the extended space and spreads them to discover kernel or
+ 	  userland code paths which assume predetermined contiguous
+ 	  device number allocation.
+ 
+ 	  Say N if you are unsure.
+ 
 -config LKDTM
 -	tristate "Linux Kernel Dump Test Tool Module"
 -	depends on DEBUG_KERNEL
 -	depends on KPROBES
 -	depends on BLOCK
 -	default n
 -	help
 -	This module enables testing of the different dumping mechanisms by
 -	inducing system failures at predefined crash points.
 -	If you don't need it: say N
 -	Choose M here to compile this code as a module. The module will be
 -	called lkdtm.
 -
 -	Documentation on how to use the module can be found in
 -	drivers/misc/lkdtm.c
 -
  config FAULT_INJECTION
  	bool "Fault-injection framework"
  	depends on DEBUG_KERNEL

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-06-27  6:13 Stephen Rothwell
  2008-06-27  8:30 ` Ingo Molnar
  0 siblings, 1 reply; 34+ messages in thread
From: Stephen Rothwell @ 2008-06-27  6:13 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-next, Thomas Gleixner, Ingo Molnar, H. Peter Anvin

[-- Attachment #1: Type: text/plain, Size: 511 bytes --]

Hi Jens,

Today's linux-next merge of the block tree got a trivial conflict in
include/asm-x86/smp.h between commit
a4c81cf684350797939416c99effb9d3ae46bca6 ("x86: extend e820 ealy_res
support 32bit") from the x86 tree and commit
3b16cf874861436725c43ba0b68bdd799297be7c ("x86: convert to generic
helpers for IPI function calls") from the block tree.

A case of contextually close deletions.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]

^ permalink raw reply	[flat|nested] 34+ messages in thread
* linux-next: manual merge of the block tree
@ 2008-06-27  6:09 Stephen Rothwell
  0 siblings, 0 replies; 34+ messages in thread
From: Stephen Rothwell @ 2008-06-27  6:09 UTC (permalink / raw)
  To: Jens Axboe
  Cc: linux-next, Thomas Gleixner, Ingo Molnar, H. Peter Anvin, Glauber Costa

[-- Attachment #1: Type: text/plain, Size: 532 bytes --]

Hi Jens,

Today's linux-next merge of the block tree got a conflict in
arch/x86/kernel/smpboot.c between commit
b9bcb3696f0c121bb0bdbb5cbdde059ee6f95d51 ("x86: change __setup_vector_irq
with setup_vector_irq") from the x86 tree and commit
3b16cf874861436725c43ba0b68bdd799297be7c ("x86: convert to generic
helpers for IPI function calls") from the block tree.

It is merely contextual, and I can carry the fixup.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

[-- Attachment #2: Type: application/pgp-signature, Size: 197 bytes --]

^ permalink raw reply	[flat|nested] 34+ messages in thread

end of thread, other threads:[~2013-10-25 15:03 UTC | newest]

Thread overview: 34+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-11-19  3:21 linux-next: manual merge of the block tree Stephen Rothwell
2008-11-19  9:14 ` Jens Axboe
2008-11-19  9:32   ` Stephen Rothwell
  -- strict thread matches above, loose matches on Subject: below --
2013-10-25 15:03 linux-next: Tree for Oct 25 Thierry Reding
2013-10-25 15:03 ` linux-next: manual merge of the block tree Thierry Reding
2013-10-14 14:48 linux-next: Tree for Oct 14 Thierry Reding
2013-10-14 14:48 ` linux-next: manual merge of the block tree Thierry Reding
2013-10-11 19:04 Mark Brown
2013-10-01 11:03 linux-next: Tree for Oct 1 Thierry Reding
2013-10-01 11:07 ` linux-next: manual merge of the block tree Thierry Reding
2013-09-30 11:26 linux-next: manual merge of the bcon tree Thierry Reding
2013-09-30 11:26 ` linux-next: manual merge of the block tree Thierry Reding
2008-12-15  7:08 Stephen Rothwell
2008-11-07  6:14 Stephen Rothwell
2008-11-07  6:10 Stephen Rothwell
2008-11-07  9:50 ` Jens Axboe
2008-11-07 10:07   ` Stephen Rothwell
2008-10-15  7:40 Stephen Rothwell
2008-09-05  6:12 Stephen Rothwell
2008-09-05  6:22 ` Jens Axboe
2008-09-05 13:58   ` James Bottomley
2008-09-03  5:58 Stephen Rothwell
2008-09-03  5:55 Stephen Rothwell
2008-09-02  6:06 Stephen Rothwell
2008-09-02  5:59 Stephen Rothwell
2008-08-28  5:30 Stephen Rothwell
2008-08-27  5:48 Stephen Rothwell
2008-08-27  5:47 Stephen Rothwell
2008-06-27  6:13 Stephen Rothwell
2008-06-27  8:30 ` Ingo Molnar
2008-06-27  8:47   ` Jens Axboe
2008-06-27  9:26     ` Ingo Molnar
2008-06-27  9:57       ` Ingo Molnar
2008-06-27 10:11         ` Ingo Molnar
2008-06-27 11:21           ` Jens Axboe
2008-06-27 11:21         ` Jens Axboe
2008-06-27 11:18       ` Jens Axboe
2008-06-27  6:09 Stephen Rothwell

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).