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block: make request_to_qc_t public 

block consumers will need it for polling requests that
are sent with blk_execute_rq_nowait. Also, get rid of
blk_tag_to_qc_t and open-code it instead.

Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2018-12-14 11:06:06 -08:00 committed by Christoph Hellwig
parent 56a77d26d6
commit 7b7ab780a0
3 changed files with 10 additions and 19 deletions
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8
block/blk-mq.c
View File

@ -1749,14 +1749,6 @@ static void blk_mq_bio_to_request(struct request *rq, struct bio *bio)
blk_account_io_start(rq, true);
}
static blk_qc_t request_to_qc_t(struct blk_mq_hw_ctx *hctx, struct request *rq)
{
if (rq->tag != -1)
return blk_tag_to_qc_t(rq->tag, hctx->queue_num, false);
return blk_tag_to_qc_t(rq->internal_tag, hctx->queue_num, true);
}
static blk_status_t __blk_mq_issue_directly(struct blk_mq_hw_ctx *hctx,
struct request *rq,
blk_qc_t *cookie, bool last)

10
include/linux/blk-mq.h
View File

@ -357,4 +357,14 @@ static inline void *blk_mq_rq_to_pdu(struct request *rq)
for ((i) = 0; (i) < (hctx)->nr_ctx && \
({ ctx = (hctx)->ctxs[(i)]; 1; }); (i)++)
static inline blk_qc_t request_to_qc_t(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
if (rq->tag != -1)
return rq->tag | (hctx->queue_num << BLK_QC_T_SHIFT);
return rq->internal_tag | (hctx->queue_num << BLK_QC_T_SHIFT) |
BLK_QC_T_INTERNAL;
}
#endif

11
include/linux/blk_types.h
View File

@ -425,17 +425,6 @@ static inline bool blk_qc_t_valid(blk_qc_t cookie)
return cookie != BLK_QC_T_NONE;
}
static inline blk_qc_t blk_tag_to_qc_t(unsigned int tag, unsigned int queue_num,
bool internal)
{
blk_qc_t ret = tag | (queue_num << BLK_QC_T_SHIFT);
if (internal)
ret |= BLK_QC_T_INTERNAL;
return ret;
}
static inline unsigned int blk_qc_t_to_queue_num(blk_qc_t cookie)
{
return (cookie & ~BLK_QC_T_INTERNAL) >> BLK_QC_T_SHIFT;