===================================================================
--- /dev/null
+++ linux-stage/fs/ext4/mmp.c
-@@ -0,0 +1,356 @@
+@@ -0,0 +1,357 @@
+#include <linux/fs.h>
+#include <linux/random.h>
+#include <linux/buffer_head.h>
+ mmp = (struct mmp_struct *)((*bh)->b_data);
+ if (le32_to_cpu(mmp->mmp_magic) != EXT4_MMP_MAGIC) {
+ brelse(*bh);
++ *bh = NULL;
+ return -EINVAL;
+ }
+