Manfred Spraul c61284e991 ipc/sem.c: bugfix for semop() not reporting successful operation ... The last change to improve the scalability moved the actual wake-up out of the section that is protected by spin_lock(sma->sem_perm.lock). This means that IN_WAKEUP can be in queue.status even when the spinlock is acquired by the current task. Thus the same loop that is performed when queue.status is read without the spinlock acquired must be performed when the spinlock is acquired. Thanks to kamezawa.hiroyu@jp.fujitsu.com for noticing lack of the memory barrier. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16255 [akpm@linux-foundation.org: clean up kerneldoc, checkpatch warning and whitespace] Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Reported-by: Luca Tettamanti <kronos.it@gmail.com> Tested-by: Luca Tettamanti <kronos.it@gmail.com> Reported-by: Christoph Lameter <cl@linux-foundation.org> Cc: Maciej Rutecki <maciej.rutecki@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-07-20 16:25:40 -07:00
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compat_mq.c
compat.c
ipc_sysctl.c
ipcns_notifier.c
Makefile
mq_sysctl.c
mqueue.c	mqueue doesn't need make_bad_inode()	2010-06-04 17:16:27 -04:00
msg.c	kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN	2010-05-25 08:07:02 -07:00
msgutil.c
namespace.c
sem.c	ipc/sem.c: bugfix for semop() not reporting successful operation	2010-07-20 16:25:40 -07:00
shm.c	drop unused dentry argument to ->fsync	2010-05-27 22:05:02 -04:00
syscall.c
util.c	kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN	2010-05-25 08:07:02 -07:00
util.h