97 			   struct blk_flush_queue *fq, blk_opf_t flags);
102 	return blk_mq_map_queue(q, REQ_OP_FLUSH, ctx)->fq;  in blk_get_flush_queue()
171 				   struct blk_flush_queue *fq,  in blk_flush_complete_seq()  argument
175 	struct list_head *pending = &fq->flush_queue[fq->flush_pending_idx];  in blk_flush_complete_seq()
192 			fq->flush_pending_since = jiffies;  in blk_flush_complete_seq()
197 		list_move_tail(&rq->flush.list, &fq->flush_data_in_flight);  in blk_flush_complete_seq()
217 	blk_kick_flush(q, fq, cmd_flags);  in blk_flush_complete_seq()
227 	struct blk_flush_queue *fq = blk_get_flush_queue(q, flush_rq->mq_ctx);  in flush_end_io()  local
230 	spin_lock_irqsave(&fq->mq_flush_lock, flags);  in flush_end_io()
233 		fq->rq_status = error;  in flush_end_io()
234 		spin_unlock_irqrestore(&fq->mq_flush_lock, flags);  in flush_end_io()
245 	if (fq->rq_status != BLK_STS_OK) {  in flush_end_io()
246 		error = fq->rq_status;  in flush_end_io()
247 		fq->rq_status = BLK_STS_OK;  in flush_end_io()
257 	running = &fq->flush_queue[fq->flush_running_idx];  in flush_end_io()
258 	BUG_ON(fq->flush_pending_idx == fq->flush_running_idx);  in flush_end_io()
261 	fq->flush_running_idx ^= 1;  in flush_end_io()
268 		blk_flush_complete_seq(rq, fq, seq, error);  in flush_end_io()
271 	spin_unlock_irqrestore(&fq->mq_flush_lock, flags);  in flush_end_io()
293 static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq,  in blk_kick_flush()  argument
296 	struct list_head *pending = &fq->flush_queue[fq->flush_pending_idx];  in blk_kick_flush()
299 	struct request *flush_rq = fq->flush_rq;  in blk_kick_flush()
302 	if (fq->flush_pending_idx != fq->flush_running_idx || list_empty(pending))  in blk_kick_flush()
306 	if (!list_empty(&fq->flush_data_in_flight) &&  in blk_kick_flush()
308 			fq->flush_pending_since + FLUSH_PENDING_TIMEOUT))  in blk_kick_flush()
315 	fq->flush_pending_idx ^= 1;  in blk_kick_flush()
365 	struct blk_flush_queue *fq = blk_get_flush_queue(q, ctx);  in mq_flush_data_end_io()  local
376 	spin_lock_irqsave(&fq->mq_flush_lock, flags);  in mq_flush_data_end_io()
377 	blk_flush_complete_seq(rq, fq, REQ_FSEQ_DATA, error);  in mq_flush_data_end_io()
378 	spin_unlock_irqrestore(&fq->mq_flush_lock, flags);  in mq_flush_data_end_io()
398 	struct blk_flush_queue *fq = blk_get_flush_queue(q, rq->mq_ctx);  in blk_insert_flush()  local
450 	spin_lock_irq(&fq->mq_flush_lock);  in blk_insert_flush()
451 	blk_flush_complete_seq(rq, fq, REQ_FSEQ_ACTIONS & ~policy, 0);  in blk_insert_flush()
452 	spin_unlock_irq(&fq->mq_flush_lock);  in blk_insert_flush()
474 	struct blk_flush_queue *fq;  in blk_alloc_flush_queue()  local
477 	fq = kzalloc_node(sizeof(*fq), flags, node);  in blk_alloc_flush_queue()
478 	if (!fq)  in blk_alloc_flush_queue()
481 	spin_lock_init(&fq->mq_flush_lock);  in blk_alloc_flush_queue()
484 	fq->flush_rq = kzalloc_node(rq_sz, flags, node);  in blk_alloc_flush_queue()
485 	if (!fq->flush_rq)  in blk_alloc_flush_queue()
488 	INIT_LIST_HEAD(&fq->flush_queue[0]);  in blk_alloc_flush_queue()
489 	INIT_LIST_HEAD(&fq->flush_queue[1]);  in blk_alloc_flush_queue()
490 	INIT_LIST_HEAD(&fq->flush_data_in_flight);  in blk_alloc_flush_queue()
492 	return fq;  in blk_alloc_flush_queue()
495 	kfree(fq);  in blk_alloc_flush_queue()
500 void blk_free_flush_queue(struct blk_flush_queue *fq)  in blk_free_flush_queue()  argument
503 	if (!fq)  in blk_free_flush_queue()
506 	kfree(fq->flush_rq);  in blk_free_flush_queue()
507 	kfree(fq);  in blk_free_flush_queue()
531 	lockdep_set_class(&hctx->fq->mq_flush_lock, key);  in blk_mq_hctx_set_fq_lock_class()