diff options
| author | Keith Busch <keith.busch@intel.com> | 2014-12-19 17:54:14 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-12-20 10:34:15 -0700 |
| commit | b4c6a028774bcf3f20ed1e66c27a05aa51a8cf55 (patch) | |
| tree | 06e839b2bd07bb335c86c9798fb9cee53cc8c6ab /block/blk-mq.c | |
| parent | c76541a932113faa5b3be65a3f0a3d4ebbc86aeb (diff) | |
| download | lwn-b4c6a028774bcf3f20ed1e66c27a05aa51a8cf55.tar.gz lwn-b4c6a028774bcf3f20ed1e66c27a05aa51a8cf55.zip | |
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/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 6 |
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) { |