From: Douglas Anderson <dianders@chromium.org> mainline inclusion from mainline-5.8-rc1 commit b9151e7bca82a17ff7aa442a168e0f924a07443c category: bugfix bugzilla: 42781 CVE: NA --------------------------- We have: * blk_mq_run_hw_queue() * blk_mq_delay_run_hw_queue() * blk_mq_run_hw_queues() ...but not blk_mq_delay_run_hw_queues(), presumably because nobody needed it before now. Since we need it for a later patch in this series, add it. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Yu Kuai <yukuai3@huawei.com> Reviewed-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- block/blk-mq.c | 19 +++++++++++++++++++ include/linux/blk-mq.h | 1 + 2 files changed, 20 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index 99806b1da1de..7f5360949509 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1456,6 +1456,25 @@ void blk_mq_run_hw_queues(struct request_queue *q, bool async) } EXPORT_SYMBOL(blk_mq_run_hw_queues); +/** + * blk_mq_delay_run_hw_queues - Run all hardware queues asynchronously. + * @q: Pointer to the request queue to run. + * @msecs: Microseconds of delay to wait before running the queues. + */ +void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs) +{ + struct blk_mq_hw_ctx *hctx; + int i; + + queue_for_each_hw_ctx(q, hctx, i) { + if (blk_mq_hctx_stopped(hctx)) + continue; + + blk_mq_delay_run_hw_queue(hctx, msecs); + } +} +EXPORT_SYMBOL(blk_mq_delay_run_hw_queues); + /** * blk_mq_queue_stopped() - check whether one or more hctxs have been stopped * @q: request queue. diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 149d4113e5d6..4878d8ed4914 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -312,6 +312,7 @@ void blk_mq_unquiesce_queue(struct request_queue *q); void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs); bool blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async); void blk_mq_run_hw_queues(struct request_queue *q, bool async); +void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs); void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, busy_tag_iter_fn *fn, void *priv); void blk_mq_freeze_queue(struct request_queue *q); -- 2.25.1