From: Davidlohr Bueso <davidlohr.bueso@hp.com>
Date: Mon, 8 Jul 2013 23:01:12 +0000 (-0700)
Subject: ipc: move locking out of ipcctl_pre_down_nolock
X-Git-Tag: v3.11-rc1~67^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b4cc5d8411bd4e9d61d8714f53859740cf830c2;p=pandora-kernel.git

ipc: move locking out of ipcctl_pre_down_nolock

This function currently acquires both the rw_mutex and the rcu lock on
successful lookups, leaving the callers to explicitly unlock them,
creating another two level locking situation.

Make the callers (including those that still use ipcctl_pre_down())
explicitly lock and unlock the rwsem and rcu lock.

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>
---

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