[dm-devel] [PATCH 2/6] dm: implement dm_md_get_queue()

[Hannes Reinecke]

From: Mike Snitzer <snitzer at redhat.com>

Add wrapper to extract the request_queue from a
mapped device.

Signed-off-by: Mike Snitzer <snitzer at redhat.com>
Signed-off-by: Hannes Reinecke <hare at suse.de>
---
 drivers/md/dm.c | 5 +++++
 drivers/md/dm.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 8c53b09..341991f 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -475,6 +475,11 @@ sector_t dm_get_size(struct mapped_device *md)
 	return get_capacity(md->disk);
 }
 
+struct request_queue *dm_get_md_queue(struct mapped_device *md)
+{
+	return md->queue;
+}
+
 struct dm_stats *dm_get_stats(struct mapped_device *md)
 {
 	return &md->stats;
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index c4569f0..1b2ca8a 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -189,6 +189,7 @@ int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only
 int dm_cancel_deferred_remove(struct mapped_device *md);
 int dm_request_based(struct mapped_device *md);
 sector_t dm_get_size(struct mapped_device *md);
+struct request_queue *dm_get_md_queue(struct mapped_device *md);
 struct dm_stats *dm_get_stats(struct mapped_device *md);
 
 int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,
-- 
1.7.12.4