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(parent: a5001a0) | patch
ipc,msg: make msgctl_nolock lockless
authorDavidlohr Bueso <davidlohr.bueso@hp.com>
Mon, 8 Jul 2013 23:01:16 +0000 (16:01 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Jul 2013 17:33:27 +0000 (10:33 -0700)
commitac0ba20ea6f2201a1589d6dc26ad1a4f0f967bb8
treebc3e2e4c4140f07ee1861b724ba7e1b295d7bbc6tree | snapshot
parenta5001a0d9768568de5d613c3b3a5b9c7721299dacommit | diff
ipc,msg: make msgctl_nolock lockless

While the INFO cmd doesn't take the ipc lock, the STAT commands do
acquire it unnecessarily.  We can do the permissions and security checks
only holding the rcu lock.

This function now mimics semctl_nolock().

Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Andi Kleen <andi@firstfloor.org>
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>
ipc/msg.c diff | blob | history
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