Derek Basehore 12c2bdb232 block: prevent race/cleanup ...

Remove a race condition which causes a warning in disk_clear_events.  This
is a race between disk_clear_events() and disk_flush_events().
ev->clearing will be altered by disk_flush_events() even though we are
blocking event checking through disk_flush_events().  If this happens
after ev->clearing was cleared for disk_clear_events(), this can cause the
WARN_ON_ONCE() in that function to be triggered.

This change also has disk_clear_events() not go through a workqueue.
Since we have to wait for the work to complete, we should just call the
function directly.  Also, since this work cannot be put on a freezable
workqueue, it will have to contend with increased demand, so calling the
function directly avoids this.

[akpm@linux-foundation.org: fix spello in comment]
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Cc: Mandeep Singh Baines <msb@chromium.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2012-12-19 20:36:10 +01:00

..

partitions

Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block

2012-12-17 13:39:11 -08:00

blk-cgroup.c

Merge branch 'for-3.8/core' of git://git.kernel.dk/linux-block

2012-12-17 08:27:23 -08:00

blk-cgroup.h

blkcg: implement per-blkg request allocation

2012-06-26 18:42:49 -04:00

blk-core.c

block: export block_unplug tracepoint

2012-12-14 20:49:27 +01:00

blk-exec.c

Merge branch 'for-3.8/core' of git://git.kernel.dk/linux-block

2012-12-17 08:27:23 -08:00

blk-flush.c

blk-flush: move the queue kick into

2011-10-24 16:24:31 +02:00

blk-integrity.c

block: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros

2011-10-31 19:31:12 -04:00

blk-ioc.c

block: uninitialized ioc->nr_tasks triggers WARN_ON

2012-08-01 12:17:27 +02:00

blk-iopoll.c

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

blk-lib.c

block: add plug for blkdev_issue_discard

2012-12-14 20:46:04 +01:00

blk-map.c

block: re-use existing 'reading' variable instead of checking direction again

2011-12-21 15:27:24 +01:00

blk-merge.c

block: Implement support for WRITE SAME

2012-09-20 14:31:45 +02:00

blk-settings.c

block: discard granularity might not be power of 2

2012-12-14 20:46:04 +01:00

blk-softirq.c

sched, block: Unify cache detection

2012-01-27 13:28:48 +01:00

blk-sysfs.c

block: Rename queue dead flag

2012-12-06 14:30:58 +01:00

blk-tag.c

block/blk-tag.c: Remove useless kfree

2012-09-12 22:25:12 +02:00

blk-throttle.c

block: Rename queue dead flag

2012-12-06 14:30:58 +01:00

blk-timeout.c

block: Drop dead function blk_abort_queue()

2012-06-15 08:46:23 +02:00

blk.h

block: Avoid that request_fn is invoked on a dead queue

2012-12-06 14:32:01 +01:00

bsg-lib.c

bsg: Remove unused function bsg_goose_queue()

2012-12-06 14:33:02 +01:00

bsg.c

bsg: fix sysfs link remove warning

2012-02-08 20:02:03 +01:00

cfq-iosched.c

block CFQ: avoid moving request to different queue

2012-11-06 12:39:51 +01:00

compat_ioctl.c

block: Add BLKROTATIONAL ioctl

2012-01-11 16:29:31 +01:00

deadline-iosched.c

deadline: Allow 0ms deadline latency, increase the read speed

2012-12-09 19:19:23 +01:00

elevator.c

block: recursive merge requests

2012-11-09 08:44:27 +01:00

genhd.c

block: prevent race/cleanup

2012-12-19 20:36:10 +01:00

ioctl.c

Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block

2012-10-11 09:04:23 +09:00

Kconfig

percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEM

2012-12-17 17:15:18 -08:00

Kconfig.iosched

blkcg: make CONFIG_BLK_CGROUP bool

2012-03-06 21:27:21 +01:00

Makefile

separate partition format handling from generic code

2012-01-03 22:54:06 -05:00

noop-iosched.c

elevator: make elevator_init_fn() return 0/-errno

2012-03-06 21:27:21 +01:00

partition-generic.c

block: add partition resize function to blkpg ioctl

2012-08-01 12:24:18 +02:00

scsi_ioctl.c

scsi: Silence unnecessary warnings about ioctl to partition

2012-06-15 12:52:46 +02:00