提交 e4cdf1a1 编写于 作者: C Christoph Hellwig 提交者: Jens Axboe

blk-mq: remove __blk_mq_alloc_request

Move most code into blk_mq_rq_ctx_init, and the rest into
blk_mq_get_request.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
上级 5bbf4e5a
......@@ -204,15 +204,31 @@ bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx)
}
EXPORT_SYMBOL(blk_mq_can_queue);
static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
struct request *rq, unsigned int op)
static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
unsigned int tag, unsigned int op)
{
struct blk_mq_tags *tags = blk_mq_tags_from_data(data);
struct request *rq = tags->static_rqs[tag];
if (data->flags & BLK_MQ_REQ_INTERNAL) {
rq->tag = -1;
rq->internal_tag = tag;
} else {
if (blk_mq_tag_busy(data->hctx)) {
rq->rq_flags = RQF_MQ_INFLIGHT;
atomic_inc(&data->hctx->nr_active);
}
rq->tag = tag;
rq->internal_tag = -1;
data->hctx->tags->rqs[rq->tag] = rq;
}
INIT_LIST_HEAD(&rq->queuelist);
/* csd/requeue_work/fifo_time is initialized before use */
rq->q = q;
rq->mq_ctx = ctx;
rq->q = data->q;
rq->mq_ctx = data->ctx;
rq->cmd_flags = op;
if (blk_queue_io_stat(q))
if (blk_queue_io_stat(data->q))
rq->rq_flags |= RQF_IO_STAT;
/* do not touch atomic flags, it needs atomic ops against the timer */
rq->cpu = -1;
......@@ -241,41 +257,9 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->end_io_data = NULL;
rq->next_rq = NULL;
ctx->rq_dispatched[op_is_sync(op)]++;
}
struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data,
unsigned int op)
{
struct request *rq;
unsigned int tag;
tag = blk_mq_get_tag(data);
if (tag != BLK_MQ_TAG_FAIL) {
struct blk_mq_tags *tags = blk_mq_tags_from_data(data);
rq = tags->static_rqs[tag];
if (data->flags & BLK_MQ_REQ_INTERNAL) {
rq->tag = -1;
rq->internal_tag = tag;
} else {
if (blk_mq_tag_busy(data->hctx)) {
rq->rq_flags = RQF_MQ_INFLIGHT;
atomic_inc(&data->hctx->nr_active);
}
rq->tag = tag;
rq->internal_tag = -1;
data->hctx->tags->rqs[rq->tag] = rq;
}
blk_mq_rq_ctx_init(data->q, data->ctx, rq, op);
return rq;
}
return NULL;
data->ctx->rq_dispatched[op_is_sync(op)]++;
return rq;
}
EXPORT_SYMBOL_GPL(__blk_mq_alloc_request);
static struct request *blk_mq_get_request(struct request_queue *q,
struct bio *bio, unsigned int op,
......@@ -283,6 +267,7 @@ static struct request *blk_mq_get_request(struct request_queue *q,
{
struct elevator_queue *e = q->elevator;
struct request *rq;
unsigned int tag;
blk_queue_enter_live(q);
data->q = q;
......@@ -302,12 +287,13 @@ static struct request *blk_mq_get_request(struct request_queue *q,
e->type->ops.mq.limit_depth(op, data);
}
rq = __blk_mq_alloc_request(data, op);
if (!rq) {
tag = blk_mq_get_tag(data);
if (tag == BLK_MQ_TAG_FAIL) {
blk_queue_exit(q);
return NULL;
}
rq = blk_mq_rq_ctx_init(data, tag, op);
if (!op_is_flush(op)) {
rq->elv.icq = NULL;
if (e && e->type->ops.mq.prepare_request) {
......
......@@ -128,12 +128,6 @@ static inline struct blk_mq_tags *blk_mq_tags_from_data(struct blk_mq_alloc_data
return data->hctx->tags;
}
/*
* Internal helpers for request allocation/init/free
*/
struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data,
unsigned int op);
static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
{
return test_bit(BLK_MQ_S_STOPPED, &hctx->state);
......
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