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block: add queue_is_mq() helper

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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 <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2018-11-15 12:22:51 -07:00
parent dabcefab45
commit 344e9ffcbd
14 changed files with 36 additions and 42 deletions
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2
block/blk-throttle.c
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@@ -2456,7 +2456,7 @@ void blk_throtl_register_queue(struct request_queue *q)
td->throtl_slice = DFL_THROTL_SLICE_HD;
#endif
td->track_bio_latency = !queue_is_rq_based(q);
td->track_bio_latency = !queue_is_mq(q);
if (!td->track_bio_latency)
blk_stat_enable_accounting(q);
}