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: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 3000121..06614ce 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -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)
 {

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 9a75c88..ebfe707 100644 (file)
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -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);