95 			   struct blk_flush_queue *fq, blk_opf_t flags);
100 	return blk_mq_map_queue(REQ_OP_FLUSH, ctx)->fq;  in blk_get_flush_queue()
149 				   struct blk_flush_queue *fq,  in blk_flush_complete_seq()  argument
153 	struct list_head *pending = &fq->flush_queue[fq->flush_pending_idx];  in blk_flush_complete_seq()
170 			fq->flush_pending_since = jiffies;  in blk_flush_complete_seq()
175 		fq->flush_data_in_flight++;  in blk_flush_complete_seq()
198 	blk_kick_flush(q, fq, cmd_flags);  in blk_flush_complete_seq()
208 	struct blk_flush_queue *fq = blk_get_flush_queue(flush_rq->mq_ctx);  in flush_end_io()  local
211 	spin_lock_irqsave(&fq->mq_flush_lock, flags);  in flush_end_io()
214 		fq->rq_status = error;  in flush_end_io()
215 		spin_unlock_irqrestore(&fq->mq_flush_lock, flags);  in flush_end_io()
226 	if (fq->rq_status != BLK_STS_OK) {  in flush_end_io()
227 		error = fq->rq_status;  in flush_end_io()
228 		fq->rq_status = BLK_STS_OK;  in flush_end_io()
238 	running = &fq->flush_queue[fq->flush_running_idx];  in flush_end_io()
239 	BUG_ON(fq->flush_pending_idx == fq->flush_running_idx);  in flush_end_io()
242 	fq->flush_running_idx ^= 1;  in flush_end_io()
250 		blk_flush_complete_seq(rq, fq, seq, error);  in flush_end_io()
253 	spin_unlock_irqrestore(&fq->mq_flush_lock, flags);  in flush_end_io()
275 static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq,  in blk_kick_flush()  argument
278 	struct list_head *pending = &fq->flush_queue[fq->flush_pending_idx];  in blk_kick_flush()
281 	struct request *flush_rq = fq->flush_rq;  in blk_kick_flush()
284 	if (fq->flush_pending_idx != fq->flush_running_idx || list_empty(pending))  in blk_kick_flush()
288 	if (fq->flush_data_in_flight &&  in blk_kick_flush()
290 			fq->flush_pending_since + FLUSH_PENDING_TIMEOUT))  in blk_kick_flush()
297 	fq->flush_pending_idx ^= 1;  in blk_kick_flush()
344 	struct blk_flush_queue *fq = blk_get_flush_queue(ctx);  in mq_flush_data_end_io()  local
355 	spin_lock_irqsave(&fq->mq_flush_lock, flags);  in mq_flush_data_end_io()
356 	fq->flush_data_in_flight--;  in mq_flush_data_end_io()
362 	blk_flush_complete_seq(rq, fq, REQ_FSEQ_DATA, error);  in mq_flush_data_end_io()
363 	spin_unlock_irqrestore(&fq->mq_flush_lock, flags);  in mq_flush_data_end_io()
385 	struct blk_flush_queue *fq = blk_get_flush_queue(rq->mq_ctx);  in blk_insert_flush()  local
444 		spin_lock_irq(&fq->mq_flush_lock);  in blk_insert_flush()
445 		fq->flush_data_in_flight++;  in blk_insert_flush()
446 		spin_unlock_irq(&fq->mq_flush_lock);  in blk_insert_flush()
454 		spin_lock_irq(&fq->mq_flush_lock);  in blk_insert_flush()
455 		blk_flush_complete_seq(rq, fq, REQ_FSEQ_ACTIONS & ~policy, 0);  in blk_insert_flush()
456 		spin_unlock_irq(&fq->mq_flush_lock);  in blk_insert_flush()
480 	struct blk_flush_queue *fq;  in blk_alloc_flush_queue()  local
483 	fq = kzalloc_node(sizeof(*fq), flags, node);  in blk_alloc_flush_queue()
484 	if (!fq)  in blk_alloc_flush_queue()
487 	spin_lock_init(&fq->mq_flush_lock);  in blk_alloc_flush_queue()
490 	fq->flush_rq = kzalloc_node(rq_sz, flags, node);  in blk_alloc_flush_queue()
491 	if (!fq->flush_rq)  in blk_alloc_flush_queue()
494 	INIT_LIST_HEAD(&fq->flush_queue[0]);  in blk_alloc_flush_queue()
495 	INIT_LIST_HEAD(&fq->flush_queue[1]);  in blk_alloc_flush_queue()
497 	return fq;  in blk_alloc_flush_queue()
500 	kfree(fq);  in blk_alloc_flush_queue()
505 void blk_free_flush_queue(struct blk_flush_queue *fq)  in blk_free_flush_queue()  argument
508 	if (!fq)  in blk_free_flush_queue()
511 	kfree(fq->flush_rq);  in blk_free_flush_queue()
512 	kfree(fq);  in blk_free_flush_queue()
536 	lockdep_set_class(&hctx->fq->mq_flush_lock, key);  in blk_mq_hctx_set_fq_lock_class()