[PATCH v3 1/2] blk-mq: Add blk_mq_complete_request_direct()
flat view
STALE1776d
LANDED
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: 2021-10-25 07:07:07
Also in:
linux-mmc
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Revision v3 of 3 in this series; landed in mainline as e8dc17e2893b on 2021-11-29.
Revisions (3)
- rfc [diff vs current]
- v2 [diff vs current]
- v3 current
Add blk_mq_complete_request_direct() which completes the block request directly instead deferring it to softirq for single queue devices. This is useful for devices which complete the requests in preemptible context and raising softirq from means scheduling ksoftirqd. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- include/linux/blk-mq.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 13ba1861e688f..4c0bd305891aa 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h@@ -521,6 +521,17 @@ static inline void blk_mq_set_request_complete(struct request *rq) WRITE_ONCE(rq->state, MQ_RQ_COMPLETE); } +/* + * Complete the request directly instead of deferring it to softirq or + * completing it another CPU. Useful in preemptible instead of an interrupt. + */ +static inline void blk_mq_complete_request_direct(struct request *rq, + void (*complete)(struct request *rq)) +{ + WRITE_ONCE(rq->state, MQ_RQ_COMPLETE); + complete(rq); +} + void blk_mq_start_request(struct request *rq); void blk_mq_end_request(struct request *rq, blk_status_t error); void __blk_mq_end_request(struct request *rq, blk_status_t error);
--
2.33.0