From 9974fa2c6a7d470ca3c201fe7dbac64bf4dd8d2a Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Fri, 28 Feb 2014 15:33:43 +0100 Subject: dm table: add dm_table_run_md_queue_async Introduce dm_table_run_md_queue_async() to run the request_queue of the mapped_device associated with a request-based DM table. Also add dm_md_get_queue() wrapper to extract the request_queue from a mapped_device. Signed-off-by: Mike Snitzer Signed-off-by: Hannes Reinecke Reviewed-by: Jun'ichi Nomura --- drivers/md/dm-table.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/md/dm-table.c') diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 2ae35b2f80fd..50601ec7017a 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1618,6 +1618,25 @@ struct mapped_device *dm_table_get_md(struct dm_table *t) } EXPORT_SYMBOL(dm_table_get_md); +void dm_table_run_md_queue_async(struct dm_table *t) +{ + struct mapped_device *md; + struct request_queue *queue; + unsigned long flags; + + if (!dm_table_request_based(t)) + return; + + md = dm_table_get_md(t); + queue = dm_get_md_queue(md); + if (queue) { + spin_lock_irqsave(queue->queue_lock, flags); + blk_run_queue_async(queue); + spin_unlock_irqrestore(queue->queue_lock, flags); + } +} +EXPORT_SYMBOL(dm_table_run_md_queue_async); + static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { -- cgit v1.2.1