Finish pulling of -ESTALE handling to upper level in do_filp_open()

Don't bother with path_walk() (and its retry loop); link_path_walk()
will do it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namei.c

@@ -1819,7 +1819,9 @@ struct file *do_filp_open(int dfd, const char *pathname,
 		return ERR_PTR(error);
 	if (force_reval)
 		nd.flags |= LOOKUP_REVAL;
-	error = path_walk(pathname, &nd);
+
+	current->total_link_count = 0;
+	error = link_path_walk(pathname, &nd);
 	if (error) {
 		filp = ERR_PTR(error);
 		goto out;