tree 6023efd860b807e7d50a20eebeaebe3e21d0285b
parent a0d092fc2df845a43cc4847836818f49331d0a5c
author Pierre Peiffer <pierre.peiffer@bull.net> 1209456049 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1209481573 -0700

IPC/semaphores: move the rwmutex handling inside semctl_down

semctl_down is called with the rwmutex (the one which protects the list of
ipcs) taken in write mode.

This patch moves this rwmutex taken in write-mode inside semctl_down.

This has the advantages of reducing a little bit the window during which this
rwmutex is taken, clarifying sys_semctl, and finally of having a coherent
behaviour with [shm|msg]ctl_down

Signed-off-by: Pierre Peiffer <pierre.peiffer@bull.net>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>