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blk-mq: move more request initialization to blk_mq_rq_ctx_init 

Don't split request initialization between __blk_mq_alloc_request and
blk_mq_rq_ctx_init.  Also remove the op argument as it can be derived
from the blk_mq_alloc_data structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-05-29 15:53:10 +02:00 committed by Jens Axboe
parent e6e7abffe3
commit 7ea4d8a4d6
1 changed files with 19 additions and 17 deletions
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36
block/blk-mq.c
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@ -271,7 +271,7 @@ static inline bool blk_mq_need_time_stamp(struct request *rq)
}
static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
unsigned int tag, unsigned int op, u64 alloc_time_ns)
unsigned int tag, u64 alloc_time_ns)
{
struct blk_mq_tags *tags = blk_mq_tags_from_data(data);
struct request *rq = tags->static_rqs[tag];
@ -295,7 +295,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
rq->mq_ctx = data->ctx;
rq->mq_hctx = data->hctx;
rq->rq_flags = rq_flags;
rq->cmd_flags = op;
rq->cmd_flags = data->cmd_flags;
if (data->flags & BLK_MQ_REQ_PREEMPT)
rq->rq_flags |= RQF_PREEMPT;
if (blk_queue_io_stat(data->q))
@ -327,8 +327,23 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
rq->end_io = NULL;
rq->end_io_data = NULL;
data->ctx->rq_dispatched[op_is_sync(op)]++;
data->ctx->rq_dispatched[op_is_sync(data->cmd_flags)]++;
refcount_set(&rq->ref, 1);
if (!op_is_flush(data->cmd_flags)) {
struct elevator_queue *e = data->q->elevator;
rq->elv.icq = NULL;
if (e && e->type->ops.prepare_request) {
if (e->type->icq_cache)
blk_mq_sched_assign_ioc(rq);
e->type->ops.prepare_request(rq);
rq->rq_flags |= RQF_ELVPRIV;
}
}
data->hctx->queued++;
return rq;
}
@ -336,7 +351,6 @@ static struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data)
{
struct request_queue *q = data->q;
struct elevator_queue *e = q->elevator;
struct request *rq;
unsigned int tag;
bool clear_ctx_on_error = false;
u64 alloc_time_ns = 0;
@ -378,19 +392,7 @@ static struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data)
return NULL;
}
rq = blk_mq_rq_ctx_init(data, tag, data->cmd_flags, alloc_time_ns);
if (!op_is_flush(data->cmd_flags)) {
rq->elv.icq = NULL;
if (e && e->type->ops.prepare_request) {
if (e->type->icq_cache)
blk_mq_sched_assign_ioc(rq);
e->type->ops.prepare_request(rq);
rq->rq_flags |= RQF_ELVPRIV;
}
}
data->hctx->queued++;
return rq;
return blk_mq_rq_ctx_init(data, tag, alloc_time_ns);
}
struct request *blk_mq_alloc_request(struct request_queue *q, unsigned int op,