vfs: spread struct mount - umount_tree argument

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/pnode.h b/fs/pnode.h
index ed8a84d..3f9ab4f 100644
--- a/fs/pnode.h
+++ b/fs/pnode.h
@@ -40,7 +40,7 @@
 void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
 			struct vfsmount *);
 void release_mounts(struct list_head *);
-void umount_tree(struct vfsmount *, int, struct list_head *);
+void umount_tree(struct mount *, int, struct list_head *);
 struct mount *copy_tree(struct vfsmount *, struct dentry *, int);
 bool is_path_reachable(struct vfsmount *, struct dentry *,
 			 const struct path *root);