blk-mq: Export freeze/unfreeze functions
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>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index bfe0f1f9..97ebb84 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -107,7 +107,7 @@
wake_up_all(&q->mq_freeze_wq);
}
-static void blk_mq_freeze_queue_start(struct request_queue *q)
+void blk_mq_freeze_queue_start(struct request_queue *q)
{
bool freeze;
@@ -120,6 +120,7 @@
blk_mq_run_queues(q, false);
}
}
+EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_start);
static void blk_mq_freeze_queue_wait(struct request_queue *q)
{
@@ -136,7 +137,7 @@
blk_mq_freeze_queue_wait(q);
}
-static void blk_mq_unfreeze_queue(struct request_queue *q)
+void blk_mq_unfreeze_queue(struct request_queue *q)
{
bool wake;
@@ -149,6 +150,7 @@
wake_up_all(&q->mq_freeze_wq);
}
}
+EXPORT_SYMBOL_GPL(blk_mq_unfreeze_queue);
bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx)
{