diff options
| -rw-r--r-- | block/blk-core.c | 46 | ||||
| -rw-r--r-- | block/blk-mq.c | 54 | ||||
| -rw-r--r-- | drivers/nvme/target/io-cmd.c | 2 | ||||
| -rw-r--r-- | fs/direct-io.c | 2 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 2 |
5 files changed, 57 insertions, 49 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 59f8129a4295..eea246567884 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -3312,52 +3312,6 @@ void blk_finish_plug(struct blk_plug *plug) } EXPORT_SYMBOL(blk_finish_plug); -bool blk_poll(struct request_queue *q, blk_qc_t cookie) -{ - struct blk_plug *plug; - long state; - unsigned int queue_num; - struct blk_mq_hw_ctx *hctx; - - if (!q->mq_ops || !q->mq_ops->poll || !blk_qc_t_valid(cookie) || - !test_bit(QUEUE_FLAG_POLL, &q->queue_flags)) - return false; - - queue_num = blk_qc_t_to_queue_num(cookie); - hctx = q->queue_hw_ctx[queue_num]; - hctx->poll_considered++; - - plug = current->plug; - if (plug) - blk_flush_plug_list(plug, false); - - state = current->state; - while (!need_resched()) { - int ret; - - hctx->poll_invoked++; - - ret = q->mq_ops->poll(hctx, blk_qc_t_to_tag(cookie)); - if (ret > 0) { - hctx->poll_success++; - set_current_state(TASK_RUNNING); - return true; - } - - if (signal_pending_state(state, current)) - set_current_state(TASK_RUNNING); - - if (current->state == TASK_RUNNING) - return true; - if (ret < 0) - break; - cpu_relax(); - } - - return false; -} -EXPORT_SYMBOL_GPL(blk_poll); - #ifdef CONFIG_PM /** * blk_pm_runtime_init - Block layer runtime PM initialization routine diff --git a/block/blk-mq.c b/block/blk-mq.c index 77110aed24ea..ae8df5ec20d3 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2461,6 +2461,60 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues) } EXPORT_SYMBOL_GPL(blk_mq_update_nr_hw_queues); +static bool __blk_mq_poll(struct blk_mq_hw_ctx *hctx, struct request *rq) +{ + struct request_queue *q = hctx->queue; + long state; + + hctx->poll_considered++; + + state = current->state; + while (!need_resched()) { + int ret; + + hctx->poll_invoked++; + + ret = q->mq_ops->poll(hctx, rq->tag); + if (ret > 0) { + hctx->poll_success++; + set_current_state(TASK_RUNNING); + return true; + } + + if (signal_pending_state(state, current)) + set_current_state(TASK_RUNNING); + + if (current->state == TASK_RUNNING) + return true; + if (ret < 0) + break; + cpu_relax(); + } + + return false; +} + +bool blk_mq_poll(struct request_queue *q, blk_qc_t cookie) +{ + struct blk_mq_hw_ctx *hctx; + struct blk_plug *plug; + struct request *rq; + + if (!q->mq_ops || !q->mq_ops->poll || !blk_qc_t_valid(cookie) || + !test_bit(QUEUE_FLAG_POLL, &q->queue_flags)) + return false; + + plug = current->plug; + if (plug) + blk_flush_plug_list(plug, false); + + hctx = q->queue_hw_ctx[blk_qc_t_to_queue_num(cookie)]; + rq = blk_mq_tag_to_rq(hctx->tags, blk_qc_t_to_tag(cookie)); + + return __blk_mq_poll(hctx, rq); +} +EXPORT_SYMBOL_GPL(blk_mq_poll); + void blk_mq_disable_hotplug(void) { mutex_lock(&all_q_mutex); diff --git a/drivers/nvme/target/io-cmd.c b/drivers/nvme/target/io-cmd.c index c2784cfc5e29..ef52b1e70144 100644 --- a/drivers/nvme/target/io-cmd.c +++ b/drivers/nvme/target/io-cmd.c @@ -96,7 +96,7 @@ static void nvmet_execute_rw(struct nvmet_req *req) cookie = submit_bio(bio); - blk_poll(bdev_get_queue(req->ns->bdev), cookie); + blk_mq_poll(bdev_get_queue(req->ns->bdev), cookie); } static void nvmet_execute_flush(struct nvmet_req *req) diff --git a/fs/direct-io.c b/fs/direct-io.c index a5138c564019..835e23a4ee4b 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -457,7 +457,7 @@ static struct bio *dio_await_one(struct dio *dio) dio->waiter = current; spin_unlock_irqrestore(&dio->bio_lock, flags); if (!(dio->iocb->ki_flags & IOCB_HIPRI) || - !blk_poll(bdev_get_queue(dio->bio_bdev), dio->bio_cookie)) + !blk_mq_poll(bdev_get_queue(dio->bio_bdev), dio->bio_cookie)) io_schedule(); /* wake up sets us TASK_RUNNING */ spin_lock_irqsave(&dio->bio_lock, flags); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 15da9e430f90..bab18ee5810d 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -952,7 +952,7 @@ extern int blk_execute_rq(struct request_queue *, struct gendisk *, extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, struct request *, int, rq_end_io_fn *); -bool blk_poll(struct request_queue *q, blk_qc_t cookie); +bool blk_mq_poll(struct request_queue *q, blk_qc_t cookie); static inline struct request_queue *bdev_get_queue(struct block_device *bdev) { |