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| author |   Manfred Spraul <manfred@colorfullife.com> | 2010-05-26 14:43:41 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-27 09:12:49 -0700 |
| commit | 0a2b9d4c79671b05956806ede5d054e03ae56280 (patch) | |
| tree | 28431a1dc1e21528c0075c7f4ac345bda40ce21b /usr | |
| parent | ipc/sem.c: optimize update_queue() for bulk wakeup calls (diff) | |
| download | linux-dev-0a2b9d4c79671b05956806ede5d054e03ae56280.tar.xz linux-dev-0a2b9d4c79671b05956806ede5d054e03ae56280.zip | |
ipc/sem.c: move wake_up_process out of the spinlock section
The wake-up part of semtimedop() consists out of two steps:
- the right tasks must be identified.
- they must be woken up.
Right now, both steps run while the array spinlock is held. This patch
reorders the code and moves the actual wake_up_process() behind the point
where the spinlock is dropped.
The code also moves setting sem->sem_otime to one place: It does not make
sense to set the last modify time multiple times.
[akpm@linux-foundation.org: repair kerneldoc]
[akpm@linux-foundation.org: fix uninitialised retval]
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions