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Commit 9c988374 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: move __elv_next_request to blk-core.c 



No need to have this helper inline in a header.  Also drop the __ prefix.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 7cb04004

block/blk-core.c

+40 −2
Original line number Diff line number Diff line
@@ -2517,6 +2517,45 @@ void blk_account_io_start(struct request *rq, bool new_io) 
	part_stat_unlock();

}



static struct request *elv_next_request(struct request_queue *q)

{

	struct request *rq;

	struct blk_flush_queue *fq = blk_get_flush_queue(q, NULL);



	WARN_ON_ONCE(q->mq_ops);



	while (1) {

		if (!list_empty(&q->queue_head)) {

			rq = list_entry_rq(q->queue_head.next);

			return rq;

		}



		/*

		 * Flush request is running and flush request isn't queueable

		 * in the drive, we can hold the queue till flush request is

		 * finished. Even we don't do this, driver can't dispatch next

		 * requests and will requeue them. And this can improve

		 * throughput too. For example, we have request flush1, write1,

		 * flush 2. flush1 is dispatched, then queue is hold, write1

		 * isn't inserted to queue. After flush1 is finished, flush2

		 * will be dispatched. Since disk cache is already clean,

		 * flush2 will be finished very soon, so looks like flush2 is

		 * folded to flush1.

		 * Since the queue is hold, a flag is set to indicate the queue

		 * should be restarted later. Please see flush_end_io() for

		 * details.

		 */

		if (fq->flush_pending_idx != fq->flush_running_idx &&

				!queue_flush_queueable(q)) {

			fq->flush_queue_delayed = 1;

			return NULL;

		}

		if (unlikely(blk_queue_bypass(q)) ||

		    !q->elevator->type->ops.sq.elevator_dispatch_fn(q, 0))

			return NULL;

	}

}



/**

 * blk_peek_request - peek at the top of a request queue

 * @q: request queue to peek at
@@ -2538,8 +2577,7 @@ struct request *blk_peek_request(struct request_queue *q) 
	lockdep_assert_held(q->queue_lock);

	WARN_ON_ONCE(q->mq_ops);



	while ((rq = __elv_next_request(q)) != NULL) {



	while ((rq = elv_next_request(q)) != NULL) {

		rq = blk_pm_peek_request(q, rq);

		if (!rq)

			break;

block/blk.h

+0 −39
Original line number Diff line number Diff line
@@ -148,45 +148,6 @@ static inline void blk_clear_rq_complete(struct request *rq) 


void blk_insert_flush(struct request *rq);



static inline struct request *__elv_next_request(struct request_queue *q)

{

	struct request *rq;

	struct blk_flush_queue *fq = blk_get_flush_queue(q, NULL);



	WARN_ON_ONCE(q->mq_ops);



	while (1) {

		if (!list_empty(&q->queue_head)) {

			rq = list_entry_rq(q->queue_head.next);

			return rq;

		}



		/*

		 * Flush request is running and flush request isn't queueable

		 * in the drive, we can hold the queue till flush request is

		 * finished. Even we don't do this, driver can't dispatch next

		 * requests and will requeue them. And this can improve

		 * throughput too. For example, we have request flush1, write1,

		 * flush 2. flush1 is dispatched, then queue is hold, write1

		 * isn't inserted to queue. After flush1 is finished, flush2

		 * will be dispatched. Since disk cache is already clean,

		 * flush2 will be finished very soon, so looks like flush2 is

		 * folded to flush1.

		 * Since the queue is hold, a flag is set to indicate the queue

		 * should be restarted later. Please see flush_end_io() for

		 * details.

		 */

		if (fq->flush_pending_idx != fq->flush_running_idx &&

				!queue_flush_queueable(q)) {

			fq->flush_queue_delayed = 1;

			return NULL;

		}

		if (unlikely(blk_queue_bypass(q)) ||

		    !q->elevator->type->ops.sq.elevator_dispatch_fn(q, 0))

			return NULL;

	}

}



static inline void elv_activate_rq(struct request_queue *q, struct request *rq)

{

	struct elevator_queue *e = q->elevator;