tree 7178c7dbb1edd12689359f49da36d4e04de93cf8
parent 8b8d52ac382b17a19906b930cd69e2edb0aca8ba
author Davidlohr Bueso <davidlohr.bueso@hp.com> 1378934776 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1378940379 -0700

ipc,shm: shorten critical region in shmctl_down

Instead of holding the ipc lock for the entire function, use the
ipcctl_pre_down_nolock and only acquire the lock for specific commands:
RMID and SET.

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>