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blk-mq: use BLK_MQ_NO_TAG in more places

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Replace various magic -1 constants for tags with BLK_MQ_NO_TAG.

Signed-off-by: Christoph Hellwig <hch@lst.de>
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 15:53:12 +02:00 committed by Jens Axboe
parent 419c3d5e80
commit 766473681c
3 changed files with 13 additions and 13 deletions
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8
block/blk-mq-tag.c
View File

@ -92,7 +92,7 @@ static int __blk_mq_get_tag(struct blk_mq_alloc_data *data,
{
if (!(data->flags & BLK_MQ_REQ_INTERNAL) &&
!hctx_may_queue(data->hctx, bt))
return -1;
return BLK_MQ_NO_TAG;
if (data->shallow_depth)
return __sbitmap_queue_get_shallow(bt, data->shallow_depth);
else
@ -121,7 +121,7 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data)
}
tag = __blk_mq_get_tag(data, bt);
if (tag != -1)
if (tag != BLK_MQ_NO_TAG)
goto found_tag;
if (data->flags & BLK_MQ_REQ_NOWAIT)
@ -143,13 +143,13 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data)
* as running the queue may also have found completions.
*/
tag = __blk_mq_get_tag(data, bt);
if (tag != -1)
if (tag != BLK_MQ_NO_TAG)
break;
sbitmap_prepare_to_wait(bt, ws, &wait, TASK_UNINTERRUPTIBLE);
tag = __blk_mq_get_tag(data, bt);
if (tag != -1)
if (tag != BLK_MQ_NO_TAG)
break;
bt_prev = bt;

14
block/blk-mq.c
View File

@ -278,7 +278,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
req_flags_t rq_flags = 0;
if (data->flags & BLK_MQ_REQ_INTERNAL) {
rq->tag = -1;
rq->tag = BLK_MQ_NO_TAG;
rq->internal_tag = tag;
} else {
if (data->hctx->flags & BLK_MQ_F_TAG_SHARED) {
@ -286,7 +286,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
atomic_inc(&data->hctx->nr_active);
}
rq->tag = tag;
rq->internal_tag = -1;
rq->internal_tag = BLK_MQ_NO_TAG;
data->hctx->tags->rqs[rq->tag] = rq;
}
@ -483,9 +483,9 @@ static void __blk_mq_free_request(struct request *rq)
blk_crypto_free_request(rq);
blk_pm_mark_last_busy(rq);
rq->mq_hctx = NULL;
if (rq->tag != -1)
if (rq->tag != BLK_MQ_NO_TAG)
blk_mq_put_tag(hctx->tags, ctx, rq->tag);
if (sched_tag != -1)
if (sched_tag != BLK_MQ_NO_TAG)
blk_mq_put_tag(hctx->sched_tags, ctx, sched_tag);
blk_mq_sched_restart(hctx);
blk_queue_exit(q);
@ -534,7 +534,7 @@ inline void __blk_mq_end_request(struct request *rq, blk_status_t error)
blk_stat_add(rq, now);
}
if (rq->internal_tag != -1)
if (rq->internal_tag != BLK_MQ_NO_TAG)
blk_mq_sched_completed_request(rq, now);
blk_account_io_done(rq, now);
@ -1044,7 +1044,7 @@ bool blk_mq_get_driver_tag(struct request *rq)
};
bool shared;
if (rq->tag != -1)
if (rq->tag != BLK_MQ_NO_TAG)
return true;
if (blk_mq_tag_is_reserved(data.hctx->sched_tags, rq->internal_tag))
@ -1060,7 +1060,7 @@ bool blk_mq_get_driver_tag(struct request *rq)
data.hctx->tags->rqs[rq->tag] = rq;
}
return rq->tag != -1;
return rq->tag != BLK_MQ_NO_TAG;
}
static int blk_mq_dispatch_wake(wait_queue_entry_t *wait, unsigned mode,

4
block/blk-mq.h
View File

@ -201,7 +201,7 @@ static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
blk_mq_put_tag(hctx->tags, rq->mq_ctx, rq->tag);
rq->tag = -1;
rq->tag = BLK_MQ_NO_TAG;
if (rq->rq_flags & RQF_MQ_INFLIGHT) {
rq->rq_flags &= ~RQF_MQ_INFLIGHT;
@ -211,7 +211,7 @@ static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
static inline void blk_mq_put_driver_tag(struct request *rq)
{
if (rq->tag == -1 || rq->internal_tag == -1)
if (rq->tag == BLK_MQ_NO_TAG || rq->internal_tag == BLK_MQ_NO_TAG)
return;
__blk_mq_put_driver_tag(rq->mq_hctx, rq);