--- 5fc9df401ec9d94069dd7753f711956d55229b30
+++ b6a562291a6d00657d572b690a18e71c1236f50b
@@ -1310,6 +1310,8 @@ extern int send_sigurg(struct fown_struc
 #define MNT_FORCE	0x00000001	/* Attempt to forcibily umount */
 #define MNT_DETACH	0x00000002	/* Just detach from the tree */
 #define MNT_EXPIRE	0x00000004	/* Mark for expiry */
+#define UMOUNT_NOFOLLOW	0x00000008	/* Don't follow symlink on umount */
+#define UMOUNT_UNUSED	0x80000000	/* Flag guaranteed to be unused */
 
 extern struct list_head super_blocks;
 extern spinlock_t sb_lock;