http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-3.0.y&id=a58e3e13f5f8c03a88195c45771b2ef3a7a53f75

--- fs/ext4/ialloc.c.~1~	2013-04-12 19:35:42.000000000 -0500
+++ fs/ext4/ialloc.c	2013-04-12 19:43:48.000000000 -0500
@@ -23,6 +23,7 @@
 #include <linux/bitops.h>
 #include <linux/blkdev.h>
 #include <linux/math64.h>
+#include <linux/vs_tag.h>
 #include <asm/byteorder.h>
 
 #include "ext4.h"