[PATCH] cgroup: Initialize root in cgroup_mount

[Jason Low <jason.low2@hp.com>]

Compiling kernel/ causes warnings:

    ... ‘root’ may be used uninitialized in this function
    ... ‘root’ was declared here

This isn't an issue since there is already logic to not use
root if we goto out_unlock without setting root.

Explicitly initialize root to NULL to suppress this so that we can
focus on catching warnings that can potentially cause bigger issues.

Signed-off-by: Jason Low <jason.low2@hp.com>
---
 kernel/cgroup.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index bb263d0..66684f3 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1738,8 +1738,8 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type,
 			 void *data)
 {
 	struct super_block *pinned_sb = NULL;
+	struct cgroup_root *root = NULL;
 	struct cgroup_subsys *ss;
-	struct cgroup_root *root;
 	struct cgroup_sb_opts opts;
 	struct dentry *dentry;
 	int ret;
-- 
1.7.1