98 	list_for_each_entry_rcu(cb, &q->stats->callbacks, list) {  in blk_stat_add()
184 	spin_lock(&q->stats->lock);  in blk_stat_add_callback()
185 	list_add_tail_rcu(&cb->list, &q->stats->callbacks);  in blk_stat_add_callback()
187 	spin_unlock(&q->stats->lock);  in blk_stat_add_callback()
194 	spin_lock(&q->stats->lock);  in blk_stat_remove_callback()
196 	if (list_empty(&q->stats->callbacks) && !q->stats->enable_accounting)  in blk_stat_remove_callback()
198 	spin_unlock(&q->stats->lock);  in blk_stat_remove_callback()
223 	spin_lock(&q->stats->lock);  in blk_stat_enable_accounting()
224 	q->stats->enable_accounting = true;  in blk_stat_enable_accounting()
226 	spin_unlock(&q->stats->lock);  in blk_stat_enable_accounting()
231 	struct blk_queue_stats *stats;  in blk_alloc_queue_stats()  local
233 	stats = kmalloc(sizeof(*stats), GFP_KERNEL);  in blk_alloc_queue_stats()
234 	if (!stats)  in blk_alloc_queue_stats()
237 	INIT_LIST_HEAD(&stats->callbacks);  in blk_alloc_queue_stats()
238 	spin_lock_init(&stats->lock);  in blk_alloc_queue_stats()
239 	stats->enable_accounting = false;  in blk_alloc_queue_stats()
241 	return stats;  in blk_alloc_queue_stats()
244 void blk_free_queue_stats(struct blk_queue_stats *stats)  in blk_free_queue_stats()  argument
246 	if (!stats)  in blk_free_queue_stats()
249 	WARN_ON(!list_empty(&stats->callbacks));  in blk_free_queue_stats()
251 	kfree(stats);  in blk_free_queue_stats()