435 static void lh_init(struct lock_history *lh, struct dm_buffer_cache *cache, bool write)  in lh_init()  argument
437 	lh->cache = cache;  in lh_init()
438 	lh->write = write;  in lh_init()
439 	lh->no_previous = cache->num_locks;  in lh_init()
440 	lh->previous = lh->no_previous;  in lh_init()
443 static void __lh_lock(struct lock_history *lh, unsigned int index)  in __lh_lock()  argument
445 	if (lh->write)  in __lh_lock()
446 		down_write(&lh->cache->trees[index].lock);  in __lh_lock()
448 		down_read(&lh->cache->trees[index].lock);  in __lh_lock()
451 static void __lh_unlock(struct lock_history *lh, unsigned int index)  in __lh_unlock()  argument
453 	if (lh->write)  in __lh_unlock()
454 		up_write(&lh->cache->trees[index].lock);  in __lh_unlock()
456 		up_read(&lh->cache->trees[index].lock);  in __lh_unlock()
462 static void lh_exit(struct lock_history *lh)  in lh_exit()  argument
464 	if (lh->previous != lh->no_previous) {  in lh_exit()
465 		__lh_unlock(lh, lh->previous);  in lh_exit()
466 		lh->previous = lh->no_previous;  in lh_exit()
474 static void lh_next(struct lock_history *lh, sector_t b)  in lh_next()  argument
476 	unsigned int index = cache_index(b, lh->no_previous); /* no_previous is num_locks */  in lh_next()
478 	if (lh->previous != lh->no_previous) {  in lh_next()
479 		if (lh->previous != index) {  in lh_next()
480 			__lh_unlock(lh, lh->previous);  in lh_next()
481 			__lh_lock(lh, index);  in lh_next()
482 			lh->previous = index;  in lh_next()
485 		__lh_lock(lh, index);  in lh_next()
486 		lh->previous = index;  in lh_next()
621 	struct lock_history *lh;  member
635 	lh_next(w->lh, b->block);  in __evict_pred()
645 				       struct lock_history *lh)  in __cache_evict()  argument
647 	struct evict_wrapper w = {.lh = lh, .pred = pred, .context = context};  in __cache_evict()
666 	struct lock_history lh;  in cache_evict()  local
668 	lh_init(&lh, bc, true);  in cache_evict()
669 	b = __cache_evict(bc, list_mode, pred, context, &lh);  in cache_evict()
670 	lh_exit(&lh);  in cache_evict()
698 			      b_predicate pred, void *context, struct lock_history *lh)  in __cache_mark_many()  argument
702 	struct evict_wrapper w = {.lh = lh, .pred = pred, .context = context};  in __cache_mark_many()
718 	struct lock_history lh;  in cache_mark_many()  local
720 	lh_init(&lh, bc, true);  in cache_mark_many()
721 	__cache_mark_many(bc, old_mode, new_mode, pred, context, &lh);  in cache_mark_many()
722 	lh_exit(&lh);  in cache_mark_many()
744 			    iter_fn fn, void *context, struct lock_history *lh)
756 		lh_next(lh, b->block);
774 	struct lock_history lh;  in cache_iterate()  local
776 	lh_init(&lh, bc, false);  in cache_iterate()
777 	__cache_iterate(bc, list_mode, fn, context, &lh);  in cache_iterate()
778 	lh_exit(&lh);  in cache_iterate()