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authorJens Axboe <axboe@fb.com>2015-12-28 21:01:22 +0100
committerJens Axboe <axboe@fb.com>2015-12-28 21:07:07 +0100
commit21491412f2ec6f13d4104de734dec0ba659d092e (patch)
tree592f39218219dcc03dec67438fcdf139b6836d51 /block
parentblock: Split bios on chunk boundaries (diff)
downloadlinux-21491412f2ec6f13d4104de734dec0ba659d092e.tar.xz
linux-21491412f2ec6f13d4104de734dec0ba659d092e.zip
block: add blk_start_queue_async()
We currently only have an inline/sync helper to restart a stopped queue. If drivers need an async version, they have to roll their own. Add a generic helper instead. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index c487b94c59e3..33e2f62d5062 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -207,6 +207,22 @@ void blk_delay_queue(struct request_queue *q, unsigned long msecs)
EXPORT_SYMBOL(blk_delay_queue);
/**
+ * blk_start_queue_async - asynchronously restart a previously stopped queue
+ * @q: The &struct request_queue in question
+ *
+ * Description:
+ * blk_start_queue_async() will clear the stop flag on the queue, and
+ * ensure that the request_fn for the queue is run from an async
+ * context.
+ **/
+void blk_start_queue_async(struct request_queue *q)
+{
+ queue_flag_clear(QUEUE_FLAG_STOPPED, q);
+ blk_run_queue_async(q);
+}
+EXPORT_SYMBOL(blk_start_queue_async);
+
+/**
* blk_start_queue - restart a previously stopped queue
* @q: The &struct request_queue in question
*