tree 07dfe1f340d35d907de80f4a80296c72896cef2c
parent c97cb9ccab8c85428ec21eff690642ad2ce1fa8a
author Davidlohr Bueso <davidlohr.bueso@hp.com> 1378934781 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1378940381 -0700

ipc,shm: shorten critical region for shmctl

With the *_INFO, *_STAT, IPC_RMID and IPC_SET commands already optimized,
deal with the remaining SHM_LOCK and SHM_UNLOCK commands.  Take the
shm_perm lock after doing the initial auditing and security checks.  The
rest of the logic remains unchanged.

Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>