diff options
| author | Manfred Spraul <manfred@colorfullife.com> | 2013-09-30 13:45:25 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-18 10:55:02 -0700 |
| commit | 00cdee573eafb5d475ac936fce98530be23ceb42 (patch) | |
| tree | 66f6bd400b84b7ed01c905f9f6245ffd7aee8a53 /arch/x86/kernel/e820.c | |
| parent | 469231ffd40187f3e0a7ef7c0b50c88fd0454d46 (diff) | |
ipc/sem.c: update sem_otime for all operations
commit 0e8c665699e953fa58dc1b0b0d09e5dce7343cc7 upstream.
In commit 0a2b9d4c7967 ("ipc/sem.c: move wake_up_process out of the
spinlock section"), the update of semaphore's sem_otime(last semop time)
was moved to one central position (do_smart_update).
But since do_smart_update() is only called for operations that modify
the array, this means that wait-for-zero semops do not update sem_otime
anymore.
The fix is simple:
Non-alter operations must update sem_otime.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Reported-by: Jia He <jiakernel@gmail.com>
Tested-by: Jia He <jiakernel@gmail.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/e820.c')
0 files changed, 0 insertions, 0 deletions