commit d8c633766ad88527f25d9f81a5c2f083d78a2b39
author Manfred Spraul <manfred@colorfullife.com> Mon Sep 30 13:45:07 2013 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Mon Sep 30 14:31:01 2013 -0700
tree 68d0ce69d04d245b8c4236b84892ea740232d6f2
parent 6d07b68ce16ae9535955ba2059dedba5309c3ca1

ipc/sem.c: synchronize the proc interface

The proc interface is not aware of sem_lock(), it instead calls
ipc_lock_object() directly.  This means that simple semop() operations
can run in parallel with the proc interface.  Right now, this is
uncritical, because the implementation doesn't do anything that requires
a proper synchronization.

But it is dangerous and therefore should be fixed.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>