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blk-mq: move blk_mq_put_driver_tag*() into blk-mq.h 

We need this helper to put the driver tag for flush rq, since we will
not share tag in the flush request sequence in the following patch
in case that I/O scheduler is applied.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
Ming Lei 2017-11-04 12:39:57 -06:00 committed by Jens Axboe
parent a6a252e649
commit 244c65a3cc
2 changed files with 33 additions and 32 deletions
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32
block/blk-mq.c
View File

@ -996,38 +996,6 @@ done:
return rq->tag != -1;
}
static void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
blk_mq_put_tag(hctx, hctx->tags, rq->mq_ctx, rq->tag);
rq->tag = -1;
if (rq->rq_flags & RQF_MQ_INFLIGHT) {
rq->rq_flags &= ~RQF_MQ_INFLIGHT;
atomic_dec(&hctx->nr_active);
}
}
static void blk_mq_put_driver_tag_hctx(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
if (rq->tag == -1 || rq->internal_tag == -1)
return;
__blk_mq_put_driver_tag(hctx, rq);
}
static void blk_mq_put_driver_tag(struct request *rq)
{
struct blk_mq_hw_ctx *hctx;
if (rq->tag == -1 || rq->internal_tag == -1)
return;
hctx = blk_mq_map_queue(rq->q, rq->mq_ctx->cpu);
__blk_mq_put_driver_tag(hctx, rq);
}
/*
* If we fail getting a driver tag because all the driver tags are already
* assigned and on the dispatch list, BUT the first entry does not have a

33
block/blk-mq.h
View File

@ -2,6 +2,7 @@
#define INT_BLK_MQ_H
#include "blk-stat.h"
#include "blk-mq-tag.h"
struct blk_mq_tag_set;
@ -156,4 +157,36 @@ static inline bool blk_mq_get_dispatch_budget(struct blk_mq_hw_ctx *hctx)
return true;
}
static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
blk_mq_put_tag(hctx, hctx->tags, rq->mq_ctx, rq->tag);
rq->tag = -1;
if (rq->rq_flags & RQF_MQ_INFLIGHT) {
rq->rq_flags &= ~RQF_MQ_INFLIGHT;
atomic_dec(&hctx->nr_active);
}
}
static inline void blk_mq_put_driver_tag_hctx(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
if (rq->tag == -1 || rq->internal_tag == -1)
return;
__blk_mq_put_driver_tag(hctx, rq);
}
static inline void blk_mq_put_driver_tag(struct request *rq)
{
struct blk_mq_hw_ctx *hctx;
if (rq->tag == -1 || rq->internal_tag == -1)
return;
hctx = blk_mq_map_queue(rq->q, rq->mq_ctx->cpu);
__blk_mq_put_driver_tag(hctx, rq);
}
#endif