]> git.karo-electronics.de Git - linux-beck.git/commit
ipc/sem.c: move wake_up_process out of the spinlock section
authorManfred Spraul <manfred@colorfullife.com>
Wed, 26 May 2010 21:43:41 +0000 (14:43 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 27 May 2010 16:12:49 +0000 (09:12 -0700)
commit0a2b9d4c79671b05956806ede5d054e03ae56280
tree28431a1dc1e21528c0075c7f4ac345bda40ce21b
parentfd5db42254518fbf241dc454e918598fbe494fa2
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>
ipc/sem.c