+#define IS_MNT_UNBINDABLE(mnt) (mnt->mnt_flags & MNT_UNBINDABLE)
+
+#define CL_EXPIRE 0x01
+#define CL_SLAVE 0x02
+#define CL_COPY_ALL 0x04
+#define CL_MAKE_SHARED 0x08
+#define CL_PROPAGATION 0x10
+
+static inline void set_mnt_shared(struct vfsmount *mnt)
+{
+ mnt->mnt_flags &= ~MNT_PNODE_MASK;
+ mnt->mnt_flags |= MNT_SHARED;
+}