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blk-mq: blk_mq_tag_busy is no need to return a value 

Currently "blk_mq_tag_busy" return value has no effect, so adjust it.
Some code implementations have also been adjusted to enhance
readability.

Signed-off-by: Liu Song <liusong@linux.alibaba.com>
Link: https://lore.kernel.org/r/1656170121-1619-1-git-send-email-liusong@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Liu Song 2022-06-25 23:15:21 +08:00 committed by Jens Axboe
parent a78418e6a0
commit ee78ec1077
2 changed files with 11 additions and 17 deletions
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18
block/blk-mq-tag.c
View File

@ -37,29 +37,25 @@ static void blk_mq_update_wake_batch(struct blk_mq_tags *tags,
* to get tag when first time, the other shared-tag users could reserve
* budget for it.
*/
bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
void __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
{
unsigned int users;
if (blk_mq_is_shared_tags(hctx->flags)) {
struct request_queue *q = hctx->queue;
if (test_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags) ||
test_and_set_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags)) {
return true;
}
if (test_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags))
return;
set_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags);
} else {
if (test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state) ||
test_and_set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state)) {
return true;
}
if (test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
return;
set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state);
}
users = atomic_inc_return(&hctx->tags->active_queues);
blk_mq_update_wake_batch(hctx->tags, users);
return true;
}
/*

10
block/blk-mq-tag.h
View File

@ -47,15 +47,13 @@ enum {
BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
};
extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
extern void __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
static inline void blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
{
if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
return false;
return __blk_mq_tag_busy(hctx);
if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
__blk_mq_tag_busy(hctx);
}
static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)