568 static void __unhash_deferred_req(struct cache_deferred_req *dreq)  in __unhash_deferred_req()  argument
570 	hlist_del_init(&dreq->hash);  in __unhash_deferred_req()
571 	if (!list_empty(&dreq->recent)) {  in __unhash_deferred_req()
572 		list_del_init(&dreq->recent);  in __unhash_deferred_req()
577 static void __hash_deferred_req(struct cache_deferred_req *dreq, struct cache_head *item)  in __hash_deferred_req()  argument
581 	INIT_LIST_HEAD(&dreq->recent);  in __hash_deferred_req()
582 	hlist_add_head(&dreq->hash, &cache_defer_hash[hash]);  in __hash_deferred_req()
585 static void setup_deferral(struct cache_deferred_req *dreq,  in setup_deferral()  argument
590 	dreq->item = item;  in setup_deferral()
594 	__hash_deferred_req(dreq, item);  in setup_deferral()
598 		list_add(&dreq->recent, &cache_defer_list);  in setup_deferral()
610 static void cache_restart_thread(struct cache_deferred_req *dreq, int too_many)  in cache_restart_thread()  argument
613 		container_of(dreq, struct thread_deferred_req, handle);  in cache_restart_thread()
620 	struct cache_deferred_req *dreq = &sleeper.handle;  in cache_wait_req()  local
623 	dreq->revisit = cache_restart_thread;  in cache_wait_req()
625 	setup_deferral(dreq, item, 0);  in cache_wait_req()
679 	struct cache_deferred_req *dreq;  in cache_defer_req()  local
686 	dreq = req->defer(req);  in cache_defer_req()
687 	if (dreq == NULL)  in cache_defer_req()
689 	setup_deferral(dreq, item, 1);  in cache_defer_req()
702 	struct cache_deferred_req *dreq;  in cache_revisit_request()  local
710 	hlist_for_each_entry_safe(dreq, tmp, &cache_defer_hash[hash], hash)  in cache_revisit_request()
711 		if (dreq->item == item) {  in cache_revisit_request()
712 			__unhash_deferred_req(dreq);  in cache_revisit_request()
713 			list_add(&dreq->recent, &pending);  in cache_revisit_request()
719 		dreq = list_entry(pending.next, struct cache_deferred_req, recent);  in cache_revisit_request()
720 		list_del_init(&dreq->recent);  in cache_revisit_request()
721 		dreq->revisit(dreq, 0);  in cache_revisit_request()
727 	struct cache_deferred_req *dreq, *tmp;  in cache_clean_deferred()  local
734 	list_for_each_entry_safe(dreq, tmp, &cache_defer_list, recent) {  in cache_clean_deferred()
735 		if (dreq->owner == owner) {  in cache_clean_deferred()
736 			__unhash_deferred_req(dreq);  in cache_clean_deferred()
737 			list_add(&dreq->recent, &pending);  in cache_clean_deferred()
743 		dreq = list_entry(pending.next, struct cache_deferred_req, recent);  in cache_clean_deferred()
744 		list_del_init(&dreq->recent);  in cache_clean_deferred()
745 		dreq->revisit(dreq, 1);  in cache_clean_deferred()