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Message-Id: <1408031441-31156-4-git-send-email-ming.lei@canonical.com> Date: Thu, 14 Aug 2014 23:50:34 +0800 From: Ming Lei <ming.lei@...onical.com> To: Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Dave Kleikamp <dave.kleikamp@...cle.com> Cc: Zach Brown <zab@...bo.net>, Benjamin LaHaise <bcrl@...ck.org>, Christoph Hellwig <hch@...radead.org>, Kent Overstreet <kmo@...erainc.com>, linux-aio@...ck.org, linux-fsdevel@...r.kernel.org, Dave Chinner <david@...morbit.com>, Ming Lei <ming.lei@...onical.com> Subject: [PATCH v1 3/9] blk-mq: export blk_mq_freeze_queue and blk_mq_unfreeze_queue It is handy to use the two helpers for switching backend file in loop driver, so export them. Signed-off-by: Ming Lei <ming.lei@...onical.com> --- block/blk-mq.c | 4 +++- block/blk-mq.h | 1 - include/linux/blk-mq.h | 2 ++ 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 5189cb1..07e1033 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -120,8 +120,9 @@ void blk_mq_freeze_queue(struct request_queue *q) blk_mq_run_queues(q, false); wait_event(q->mq_freeze_wq, percpu_ref_is_zero(&q->mq_usage_counter)); } +EXPORT_SYMBOL(blk_mq_freeze_queue); -static void blk_mq_unfreeze_queue(struct request_queue *q) +void blk_mq_unfreeze_queue(struct request_queue *q) { bool wake = false; @@ -134,6 +135,7 @@ static void blk_mq_unfreeze_queue(struct request_queue *q) wake_up_all(&q->mq_freeze_wq); } } +EXPORT_SYMBOL(blk_mq_unfreeze_queue); bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx) { diff --git a/block/blk-mq.h b/block/blk-mq.h index ca4964a..3800316 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -28,7 +28,6 @@ struct blk_mq_ctx { void __blk_mq_complete_request(struct request *rq); void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async); void blk_mq_init_flush(struct request_queue *q); -void blk_mq_freeze_queue(struct request_queue *q); void blk_mq_free_queue(struct request_queue *q); void blk_mq_clone_flush_request(struct request *flush_rq, struct request *orig_rq); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index eb726b9..1cc1baa 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -175,6 +175,8 @@ void blk_mq_start_hw_queues(struct request_queue *q); void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async); void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs); void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); +void blk_mq_freeze_queue(struct request_queue *q); +void blk_mq_unfreeze_queue(struct request_queue *q); /* * Driver command data is immediately after the request. So subtract request -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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