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Commit 344e9ffc authored by Jens Axboe's avatar Jens Axboe
Browse files

block: add queue_is_mq() helper 



Various spots check for q->mq_ops being non-NULL, but provide
a helper to do this instead.

Where the ->mq_ops != NULL check is redundant, remove it.

Since mq == rq-based now that legacy is gone, get rid of the
queue_is_rq_based() and just use queue_is_mq() everywhere.

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

block/blk-cgroup.c

+4 −4
Original line number Diff line number Diff line
@@ -1324,7 +1324,7 @@ int blkcg_activate_policy(struct request_queue *q, 
	if (blkcg_policy_enabled(q, pol))

		return 0;



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_freeze_queue(q);

pd_prealloc:

	if (!pd_prealloc) {
@@ -1363,7 +1363,7 @@ int blkcg_activate_policy(struct request_queue *q, 


	spin_unlock_irq(&q->queue_lock);

out_bypass_end:

	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_unfreeze_queue(q);

	if (pd_prealloc)

		pol->pd_free_fn(pd_prealloc);
@@ -1387,7 +1387,7 @@ void blkcg_deactivate_policy(struct request_queue *q, 
	if (!blkcg_policy_enabled(q, pol))

		return;



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_freeze_queue(q);



	spin_lock_irq(&q->queue_lock);
@@ -1405,7 +1405,7 @@ void blkcg_deactivate_policy(struct request_queue *q, 


	spin_unlock_irq(&q->queue_lock);



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_unfreeze_queue(q);

}

EXPORT_SYMBOL_GPL(blkcg_deactivate_policy);

block/blk-core.c

+6 −6
Original line number Diff line number Diff line
@@ -232,7 +232,7 @@ void blk_sync_queue(struct request_queue *q) 
	del_timer_sync(&q->timeout);

	cancel_work_sync(&q->timeout_work);



	if (q->mq_ops) {

	if (queue_is_mq(q)) {

		struct blk_mq_hw_ctx *hctx;

		int i;
@@ -281,7 +281,7 @@ void blk_set_queue_dying(struct request_queue *q) 
	 */

	blk_freeze_queue_start(q);



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_wake_waiters(q);



	/* Make blk_queue_enter() reexamine the DYING flag. */
@@ -356,7 +356,7 @@ void blk_cleanup_queue(struct request_queue *q) 
	 * blk_freeze_queue() should be enough for cases of passthrough

	 * request.

	 */

	if (q->mq_ops && blk_queue_init_done(q))

	if (queue_is_mq(q) && blk_queue_init_done(q))

		blk_mq_quiesce_queue(q);



	/* for synchronous bio-based driver finish in-flight integrity i/o */
@@ -374,7 +374,7 @@ void blk_cleanup_queue(struct request_queue *q) 


	blk_exit_queue(q);



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_free_queue(q);



	percpu_ref_exit(&q->q_usage_counter);
@@ -982,7 +982,7 @@ generic_make_request_checks(struct bio *bio) 
	 * For a REQ_NOWAIT based request, return -EOPNOTSUPP

	 * if queue is not a request based queue.

	 */

	if ((bio->bi_opf & REQ_NOWAIT) && !queue_is_rq_based(q))

	if ((bio->bi_opf & REQ_NOWAIT) && !queue_is_mq(q))

		goto not_supported;



	if (should_fail_bio(bio))
@@ -1657,7 +1657,7 @@ EXPORT_SYMBOL_GPL(rq_flush_dcache_pages); 
 */

int blk_lld_busy(struct request_queue *q)

{

	if (q->mq_ops && q->mq_ops->busy)

	if (queue_is_mq(q) && q->mq_ops->busy)

		return q->mq_ops->busy(q);



	return 0;

block/blk-flush.c

+1 −2
Original line number Diff line number Diff line
@@ -273,8 +273,7 @@ static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq, 
	 * assigned to empty flushes, and we deadlock if we are expecting

	 * other requests to make progress. Don't defer for that case.

	 */

	if (!list_empty(&fq->flush_data_in_flight) &&

	    !(q->mq_ops && q->elevator) &&

	if (!list_empty(&fq->flush_data_in_flight) && q->elevator &&

	    time_before(jiffies,

			fq->flush_pending_since + FLUSH_PENDING_TIMEOUT))

		return;

block/blk-mq.c

+1 −1
Original line number Diff line number Diff line
@@ -150,7 +150,7 @@ void blk_freeze_queue_start(struct request_queue *q) 
	freeze_depth = atomic_inc_return(&q->mq_freeze_depth);

	if (freeze_depth == 1) {

		percpu_ref_kill(&q->q_usage_counter);

		if (q->mq_ops)

		if (queue_is_mq(q))

			blk_mq_run_hw_queues(q, false);

	}

}

block/blk-sysfs.c

+7 −7
Original line number Diff line number Diff line
@@ -68,7 +68,7 @@ queue_requests_store(struct request_queue *q, const char *page, size_t count) 
	unsigned long nr;

	int ret, err;



	if (!q->mq_ops)

	if (!queue_is_mq(q))

		return -EINVAL;



	ret = queue_var_store(&nr, page, count);
@@ -835,12 +835,12 @@ static void __blk_release_queue(struct work_struct *work) 


	blk_queue_free_zone_bitmaps(q);



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_release(q);



	blk_trace_shutdown(q);



	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_debugfs_unregister(q);



	bioset_exit(&q->bio_split);
@@ -914,7 +914,7 @@ int blk_register_queue(struct gendisk *disk) 
		goto unlock;

	}



	if (q->mq_ops) {

	if (queue_is_mq(q)) {

		__blk_mq_register_dev(dev, q);

		blk_mq_debugfs_register(q);

	}
@@ -925,7 +925,7 @@ int blk_register_queue(struct gendisk *disk) 


	blk_throtl_register_queue(q);



	if ((q->mq_ops && q->elevator)) {

	if (q->elevator) {

		ret = elv_register_queue(q);

		if (ret) {

			mutex_unlock(&q->sysfs_lock);
@@ -974,7 +974,7 @@ void blk_unregister_queue(struct gendisk *disk) 
	 * Remove the sysfs attributes before unregistering the queue data

	 * structures that can be modified through sysfs.

	 */

	if (q->mq_ops)

	if (queue_is_mq(q))

		blk_mq_unregister_dev(disk_to_dev(disk), q);

	mutex_unlock(&q->sysfs_lock);
@@ -983,7 +983,7 @@ void blk_unregister_queue(struct gendisk *disk) 
	blk_trace_remove_sysfs(disk_to_dev(disk));



	mutex_lock(&q->sysfs_lock);

	if (q->mq_ops && q->elevator)

	if (q->elevator)

		elv_unregister_queue(q);

	mutex_unlock(&q->sysfs_lock);