diff --git a/fs/mount.h b/fs/mount.h
new file mode 100644
index 0000000..7890e49
--- /dev/null
+++ b/fs/mount.h
@@ -0,0 +1,6 @@
+#include <linux/mount.h>
+
+static inline int mnt_has_parent(struct vfsmount *mnt)
+{
+	return mnt != mnt->mnt_parent;
+}