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eed8c02e68
linux/drivers/md
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Lukas Czerner eed8c02e68 wait: add wait_event_lock_irq() interface 
New wait_event{_interruptible}_lock_irq{_cmd} macros added. This commit
moves the private wait_event_lock_irq() macro from MD to regular wait
includes, introduces new macro wait_event_lock_irq_cmd() instead of using
the old method with omitting cmd parameter which is ugly and makes a use
of new macros in the MD. It also introduces the _interruptible_ variant.

The use of new interface is when one have a special lock to protect data
structures used in the condition, or one also needs to invoke "cmd"
before putting it to sleep.

All new macros are expected to be called with the lock taken. The lock
is released before sleep and is reacquired afterwards. We will leave the
macro with the lock held.

Note to DM: IMO this should also fix theoretical race on waitqueue while
using simultaneously wait_event_lock_irq() and wait_event() because of
lack of locking around current state setting and wait queue removal.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Cc: Neil Brown <neilb@suse.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-11-30 11:47:57 +01:00
..
persistent-data dm persistent data: convert to use le32_add_cpu 2012-10-12 16:59:47 +01:00
bitmap.c md/bitmap:Don't use IS_ERR to judge alloc_page(). 2012-10-11 13:45:36 +11:00
bitmap.h md/bitmap: record the space available for the bitmap in the superblock. 2012-05-22 13:55:34 +10:00
dm-bio-prison.c dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
dm-bio-prison.h dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
dm-bio-record.h
dm-bufio.c dm: use ACCESS_ONCE for sysfs values 2012-10-12 16:59:46 +01:00
dm-bufio.h dm bufio: prefetch 2012-03-28 18:41:29 +01:00
dm-crypt.c block: Add bio_clone_bioset(), bio_clone_kmalloc() 2012-09-09 10:35:39 +02:00
dm-delay.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-exception-store.c dm: replace simple_strtoul 2012-07-27 15:07:59 +01:00
dm-exception-store.h dm snapshot: test chunk size against both origin and snapshot 2010-08-12 04:13:51 +01:00
dm-flakey.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-io.c block: Generalized bio pool freeing 2012-09-09 10:35:38 +02:00
dm-ioctl.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-kcopyd.c dm kcopyd: add dm_kcopyd_zero to zero an area 2011-10-31 20:18:58 +00:00
dm-linear.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-log-userspace-base.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
dm-log-userspace-transfer.c connector/userns: replace netlink uses of cap_raised() with capable() 2012-05-10 23:21:39 -04:00
dm-log-userspace-transfer.h
dm-log.c dm: use memweight() 2012-07-30 17:25:16 -07:00
dm-mpath.c dm mpath: fix check for null mpio in end_io fn 2012-10-12 16:59:42 +01:00
dm-mpath.h
dm-path-selector.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-path-selector.h
dm-queue-length.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-raid.c DM RAID: Fix for "sync" directive ineffectiveness 2012-10-11 13:42:19 +11:00
dm-raid1.c workqueue: deprecate flush[_delayed]_work_sync() 2012-08-20 14:51:24 -07:00
dm-region-hash.c dm raid1: fix crash with mirror recovery and discard 2012-07-20 14:25:03 +01:00
dm-round-robin.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-service-time.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-snap-persistent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap-transient.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap.c dm thin: commit before gathering status 2012-07-27 15:08:16 +01:00
dm-stripe.c workqueue: deprecate flush[_delayed]_work_sync() 2012-08-20 14:51:24 -07:00
dm-sysfs.c Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
dm-table.c dm: retain table limits when swapping to new table with no devices 2012-09-26 23:45:45 +01:00
dm-target.c dm: error return error for discards 2010-08-12 04:14:14 +01:00
dm-thin-metadata.c dm thin metadata: introduce dm_pool_abort_metadata 2012-07-27 15:08:15 +01:00
dm-thin-metadata.h dm thin metadata: introduce dm_pool_abort_metadata 2012-07-27 15:08:15 +01:00
dm-thin.c dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
dm-uevent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-uevent.h
dm-verity.c dm: use ACCESS_ONCE for sysfs values 2012-10-12 16:59:46 +01:00
dm-zero.c dm: zero silently drop discards 2010-08-12 04:14:12 +01:00
dm.c dm: store dm_target_io in bio front_pad 2012-10-12 21:02:15 +01:00
dm.h dm: retain table limits when swapping to new table with no devices 2012-09-26 23:45:45 +01:00
faulty.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
Kconfig dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
linear.c md: linear supports TRIM 2012-10-11 13:08:44 +11:00
linear.h md/linear: typedef removal: linear_conf_t -> struct linear_conf 2011-10-11 16:48:54 +11:00
Makefile dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
md.c wait: add wait_event_lock_irq() interface 2012-11-30 11:47:57 +01:00
md.h wait: add wait_event_lock_irq() interface 2012-11-30 11:47:57 +01:00
multipath.c MD: change the parameter of md thread 2012-10-11 13:34:00 +11:00
multipath.h md/multipath: typedef removal: multipath_conf_t -> struct mpconf 2011-10-11 16:48:57 +11:00
raid1.c wait: add wait_event_lock_irq() interface 2012-11-30 11:47:57 +01:00
raid1.h md/raid1: prevent merging too large request 2012-07-31 10:03:53 +10:00
raid5.c wait: add wait_event_lock_irq() interface 2012-11-30 11:47:57 +01:00
raid5.h MD: raid5 trim support 2012-10-11 13:49:05 +11:00
raid10.c wait: add wait_event_lock_irq() interface 2012-11-30 11:47:57 +01:00
raid10.h md/raid10: fix problem with on-stack allocation of r10bio structure. 2012-08-18 09:51:42 +10:00
raid0.c md: raid 0 supports TRIM 2012-10-11 13:25:44 +11:00
raid0.h md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00