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block: add queue_is_mq() helper

Browse source 
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: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2018-11-15 12:22:51 -07:00
commit 344e9ffcbd
14 changed files with 36 additions and 42 deletions
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14
block/blk-sysfs.c
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@ -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);