Fix leak on /proc/lockdep_stats

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/lockdep_proc.c

@@ -346,7 +346,7 @@ static const struct file_operations proc_lockdep_stats_operations = {
 	.open		= lockdep_stats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 #ifdef CONFIG_LOCK_STAT