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authorKeith Busch <keith.busch@intel.com>2014-12-19 17:54:14 -0700
committerJens Axboe <axboe@fb.com>2014-12-20 10:34:15 -0700
commitb4c6a028774bcf3f20ed1e66c27a05aa51a8cf55 (patch)
tree06e839b2bd07bb335c86c9798fb9cee53cc8c6ab /block
parentc76541a932113faa5b3be65a3f0a3d4ebbc86aeb (diff)
downloadlinux-b4c6a028774bcf3f20ed1e66c27a05aa51a8cf55.tar.bz2
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>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index bfe0f1f9cfa0..97ebb84b5633 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -107,7 +107,7 @@ static void blk_mq_usage_counter_release(struct percpu_ref *ref)
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 @@ static void blk_mq_freeze_queue_start(struct request_queue *q)
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 @@ void blk_mq_freeze_queue(struct request_queue *q)
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 @@ static void blk_mq_unfreeze_queue(struct request_queue *q)
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)
{