528 static void __unhash_deferred_req(struct cache_deferred_req *dreq)  in __unhash_deferred_req()  argument
530 	hlist_del_init(&dreq->hash);  in __unhash_deferred_req()
531 	if (!list_empty(&dreq->recent)) {  in __unhash_deferred_req()
532 		list_del_init(&dreq->recent);  in __unhash_deferred_req()
537 static void __hash_deferred_req(struct cache_deferred_req *dreq, struct cache_head *item)  in __hash_deferred_req()  argument
541 	INIT_LIST_HEAD(&dreq->recent);  in __hash_deferred_req()
542 	hlist_add_head(&dreq->hash, &cache_defer_hash[hash]);  in __hash_deferred_req()
545 static void setup_deferral(struct cache_deferred_req *dreq,  in setup_deferral()  argument
550 	dreq->item = item;  in setup_deferral()
554 	__hash_deferred_req(dreq, item);  in setup_deferral()
558 		list_add(&dreq->recent, &cache_defer_list);  in setup_deferral()
570 static void cache_restart_thread(struct cache_deferred_req *dreq, int too_many)  in cache_restart_thread()  argument
573 		container_of(dreq, struct thread_deferred_req, handle);  in cache_restart_thread()
580 	struct cache_deferred_req *dreq = &sleeper.handle;  in cache_wait_req()  local
583 	dreq->revisit = cache_restart_thread;  in cache_wait_req()
585 	setup_deferral(dreq, item, 0);  in cache_wait_req()
639 	struct cache_deferred_req *dreq;  in cache_defer_req()  local
646 	dreq = req->defer(req);  in cache_defer_req()
647 	if (dreq == NULL)  in cache_defer_req()
649 	setup_deferral(dreq, item, 1);  in cache_defer_req()
662 	struct cache_deferred_req *dreq;  in cache_revisit_request()  local
670 	hlist_for_each_entry_safe(dreq, tmp, &cache_defer_hash[hash], hash)  in cache_revisit_request()
671 		if (dreq->item == item) {  in cache_revisit_request()
672 			__unhash_deferred_req(dreq);  in cache_revisit_request()
673 			list_add(&dreq->recent, &pending);  in cache_revisit_request()
679 		dreq = list_entry(pending.next, struct cache_deferred_req, recent);  in cache_revisit_request()
680 		list_del_init(&dreq->recent);  in cache_revisit_request()
681 		dreq->revisit(dreq, 0);  in cache_revisit_request()
687 	struct cache_deferred_req *dreq, *tmp;  in cache_clean_deferred()  local
694 	list_for_each_entry_safe(dreq, tmp, &cache_defer_list, recent) {  in cache_clean_deferred()
695 		if (dreq->owner == owner) {  in cache_clean_deferred()
696 			__unhash_deferred_req(dreq);  in cache_clean_deferred()
697 			list_add(&dreq->recent, &pending);  in cache_clean_deferred()
703 		dreq = list_entry(pending.next, struct cache_deferred_req, recent);  in cache_clean_deferred()
704 		list_del_init(&dreq->recent);  in cache_clean_deferred()
705 		dreq->revisit(dreq, 1);  in cache_clean_deferred()