555 	struct done_ref *dr;  in done_already()  local
559 		dr = rb_entry(parent, struct done_ref, rb);  in done_already()
560 		if (lnum < dr->lnum)  in done_already()
562 		else if (lnum > dr->lnum)  in done_already()
568 	dr = kzalloc(sizeof(struct done_ref), GFP_NOFS);  in done_already()
569 	if (!dr)  in done_already()
572 	dr->lnum = lnum;  in done_already()
574 	rb_link_node(&dr->rb, parent, p);  in done_already()
575 	rb_insert_color(&dr->rb, done_tree);  in done_already()
586 	struct done_ref *dr, *n;  in destroy_done_tree()  local
588 	rbtree_postorder_for_each_entry_safe(dr, n, done_tree, rb)  in destroy_done_tree()
589 		kfree(dr);  in destroy_done_tree()