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Commit b94ec296 authored by Mike Snitzer's avatar Mike Snitzer Committed by Jens Axboe
Browse files

blk-mq: export blk_mq_run_hw_queues 



Rename blk_mq_run_queues to blk_mq_run_hw_queues, add async argument,
and export it.

DM's suspend support must be able to run the queue without starting
stopped hw queues.

Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent b62c21b7

block/blk-mq.c

+4 −4
Original line number Diff line number Diff line
@@ -33,7 +33,6 @@ static DEFINE_MUTEX(all_q_mutex); 
static LIST_HEAD(all_q_list);



static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx);

static void blk_mq_run_queues(struct request_queue *q);



/*

 * Check if any of the ctx's have pending work in this hardware queue
@@ -118,7 +117,7 @@ void blk_mq_freeze_queue_start(struct request_queue *q) 


	if (freeze) {

		percpu_ref_kill(&q->mq_usage_counter);

		blk_mq_run_queues(q);

		blk_mq_run_hw_queues(q, false);

	}

}

EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_start);
@@ -904,7 +903,7 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async) 
			&hctx->run_work, 0);

}



static void blk_mq_run_queues(struct request_queue *q)

void blk_mq_run_hw_queues(struct request_queue *q, bool async)

{

	struct blk_mq_hw_ctx *hctx;

	int i;
@@ -915,9 +914,10 @@ static void blk_mq_run_queues(struct request_queue *q) 
		    test_bit(BLK_MQ_S_STOPPED, &hctx->state))

			continue;



		blk_mq_run_hw_queue(hctx, false);

		blk_mq_run_hw_queue(hctx, async);

	}

}

EXPORT_SYMBOL(blk_mq_run_hw_queues);



void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)

{

include/linux/blk-mq.h

+1 −0
Original line number Diff line number Diff line
@@ -220,6 +220,7 @@ void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx); 
void blk_mq_stop_hw_queues(struct request_queue *q);

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_run_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);