Index: uspace/lib/libc/include/ipc/vfs.h
===================================================================
--- uspace/lib/libc/include/ipc/vfs.h	(revision c1a8e5e6db663f724f0c5446f748c2e402163dfb)
+++ uspace/lib/libc/include/ipc/vfs.h	(revision 50fda246446cc7b9ea6f17465aa5d2853fd2aa0b)
@@ -148,4 +148,11 @@
 #define L_OPEN  64
 
+/**
+ * L_NOCROSS_LAST_MP is used exclusively during the VFS_IN_UNMOUNT operation. It
+ * tells the lookup routine not to cross the last mount point in the lookup
+ * path.
+ */
+#define L_NOCROSS_LAST_MP	128
+
 #endif