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blk-mq: Export freeze/unfreeze functions

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Let drivers prevent entering a queue that isn't available.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch
2014-12-19 17:54:14 -07:00
committed by Jens Axboe
parent c76541a932
commit b4c6a02877
2 changed files with 6 additions and 2 deletions
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2
include/linux/blk-mq.h
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@@ -212,6 +212,8 @@ 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_hw_ctx *hctx, busy_iter_fn *fn,
void *priv);
void blk_mq_unfreeze_queue(struct request_queue *q);
void blk_mq_freeze_queue_start(struct request_queue *q);
/*
* Driver command data is immediately after the request. So subtract request