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| author | Ming Lei <ming.lei@redhat.com> | 2017-06-06 23:22:03 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-18 14:20:04 -0600 |
| commit | e4e739131ac93d373cd2d2fd92820a6a39115ba5 (patch) | |
| tree | 7569770cf51a79c6b55390958f7bef3182287863 /block | |
| parent | 4f084b41a0c04a69067be98a210e6b50969f9945 (diff) | |
| download | linux-e4e739131ac93d373cd2d2fd92820a6a39115ba5.tar.bz2 | |
blk-mq: introduce blk_mq_unquiesce_queue
blk_mq_start_stopped_hw_queues() is used implictly
as counterpart of blk_mq_quiesce_queue() for unquiescing queue,
so we introduce blk_mq_unquiesce_queue() and make it
as counterpart of blk_mq_quiesce_queue() explicitly.
This function is for improving the current quiescing mechanism
in the following patches.
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index cc85de9d6b2d..07785b5cf2bc 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -181,6 +181,19 @@ void blk_mq_quiesce_queue(struct request_queue *q) } EXPORT_SYMBOL_GPL(blk_mq_quiesce_queue); +/* + * blk_mq_unquiesce_queue() - counterpart of blk_mq_quiesce_queue() + * @q: request queue. + * + * This function recovers queue into the state before quiescing + * which is done by blk_mq_quiesce_queue. + */ +void blk_mq_unquiesce_queue(struct request_queue *q) +{ + blk_mq_start_stopped_hw_queues(q, true); +} +EXPORT_SYMBOL_GPL(blk_mq_unquiesce_queue); + void blk_mq_wake_waiters(struct request_queue *q) { struct blk_mq_hw_ctx *hctx; |