Found by static checker (http://repo.or.cz/w/smatch.git).
Signed-off-by: NDan Carpenter <error27@gmail.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>