From 205a872bd6f9a9a09ef035ef1e90185a8245cc58 Mon Sep 17 00:00:00 2001
From: Greg Thelen <gthelen@google.com>
Date: Wed, 28 Nov 2012 13:50:44 -0800
Subject: [PATCH] cgroup: fix lockdep warning for event_control

The cgroup_event_wake() function is called with the wait queue head
locked and it takes cgrp->event_list_lock. However, in cgroup_rmdir()
remove_wait_queue() was being called after taking
cgrp->event_list_lock.  Correct the lock ordering by using a temporary
list to obtain the event list to remove from the wait queue.

Signed-off-by: Greg Thelen <gthelen@google.com>
Signed-off-by: Aaron Durbin <adurbin@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---
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