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blk-mq: remove BLK_MQ_F_DEFER_ISSUE 

This flag was never used since it was introduced.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2017-03-22 15:01:49 -04:00 committed by Jens Axboe
parent d01b2dcb44
commit 7642747d67
2 changed files with 1 additions and 8 deletions
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8
block/blk-mq.c
View File

@ -1531,13 +1531,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
}
plug = current->plug;
/*
* If the driver supports defer issued based on 'last', then
* queue it up like normal since we can potentially save some
* CPU this way.
*/
if (((plug && !blk_queue_nomerges(q)) || is_sync) &&
!(data.hctx->flags & BLK_MQ_F_DEFER_ISSUE)) {
if (((plug && !blk_queue_nomerges(q)) || is_sync)) {
struct request *old_rq = NULL;
blk_mq_bio_to_request(rq, bio);

1
include/linux/blk-mq.h
View File

@ -152,7 +152,6 @@ enum {
BLK_MQ_F_SHOULD_MERGE = 1 << 0,
BLK_MQ_F_TAG_SHARED = 1 << 1,
BLK_MQ_F_SG_MERGE = 1 << 2,
BLK_MQ_F_DEFER_ISSUE = 1 << 4,
BLK_MQ_F_BLOCKING = 1 << 5,
BLK_MQ_F_NO_SCHED = 1 << 6,
BLK_MQ_F_ALLOC_POLICY_START_BIT = 8,