[Devel] [PATCH] cgroup: fix reverse unlock sequence in cgroup_get_sb

[Xiaotian Feng]

In cgroup_get_sb, the lock sequence is:
	mutex_lock(&inode->i_mutex);
	mutex_lock(&cgroup->mutex);
so the last unlock sequence should be:
	mutex_unlock(&cgroup->mutex);
	mutex_unlock(&inode->i_mutex);

Signed-off-by: Xiaotian Feng <dfeng at redhat.com>
---
 kernel/cgroup.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 3737a68..11ef162 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1140,8 +1140,8 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
 		BUG_ON(root->number_of_cgroups != 1);
 
 		cgroup_populate_dir(root_cgrp);
-		mutex_unlock(&inode->i_mutex);
 		mutex_unlock(&cgroup_mutex);
+		mutex_unlock(&inode->i_mutex);
 	}
 
 	simple_set_mnt(mnt, sb);
-- 
1.6.2.5

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