de83b2a9d9
new_node makes the assumption that when it does last_dir on a path, a successive advance would not yield a lock on a vmnt, because last_dir already locked the vmnt. This is true except when last_dir resolves to a directory on the parent vmnt of the file that was the result of advance. For example, # cd / # echo foo > home where home is on a different (sub) partition than / is (default install). last_dir would resolve to / and advance would resolve to /home. With this change, last_dir resolves to the root node on the /home partition, making the assumption valid again.