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Code Issues Releases Wiki Activity

block: cache rq_flags inside blk_mq_rq_ctx_init()

Browse source 
Add a local variable for rq_flags, it helps to compile out some of
rq_flags reloads.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-10-18 21:37:29 +01:00 committed by Jens Axboe
parent 605f784e4f
commit 128459062b
1 changed files with 8 additions and 6 deletions
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14
block/blk-mq.c
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@ -318,17 +318,23 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
struct elevator_queue *e = q->elevator;
struct blk_mq_tags *tags = blk_mq_tags_from_data(data);
struct request *rq = tags->static_rqs[tag];
unsigned int rq_flags = 0;
if (e) {
rq->rq_flags = RQF_ELV;
rq_flags = RQF_ELV;
rq->tag = BLK_MQ_NO_TAG;
rq->internal_tag = tag;
} else {
rq->rq_flags = 0;
rq->tag = tag;
rq->internal_tag = BLK_MQ_NO_TAG;
}
if (data->flags & BLK_MQ_REQ_PM)
rq_flags |= RQF_PM;
if (blk_queue_io_stat(q))
rq_flags |= RQF_IO_STAT;
rq->rq_flags = rq_flags;
if (blk_mq_need_time_stamp(rq))
rq->start_time_ns = ktime_get_ns();
else
@ -338,10 +344,6 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
rq->mq_ctx = ctx;
rq->mq_hctx = hctx;
rq->cmd_flags = data->cmd_flags;
if (data->flags & BLK_MQ_REQ_PM)
rq->rq_flags |= RQF_PM;
if (blk_queue_io_stat(q))
rq->rq_flags |= RQF_IO_STAT;
rq->rq_disk = NULL;
rq->part = NULL;
#ifdef CONFIG_BLK_RQ_ALLOC_TIME