From d229a9589ff3b988d3f999cdcfa350f97a372673 Mon Sep 17 00:00:00 2001
From: David Teigland <teigland@redhat.com>
Date: Fri, 6 Jan 2006 00:20:01 -0800
Subject: [PATCH] device-mapper: add dm_get_md

Add dm_get_dev() to get a mapped device given its dev_t.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/md/dm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'drivers/md/dm.c')

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 27cd234cf68..9e8c1edd89d 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -921,6 +921,16 @@ static struct mapped_device *dm_find_md(dev_t dev)
 	return md;
 }
 
+struct mapped_device *dm_get_md(dev_t dev)
+{
+	struct mapped_device *md = dm_find_md(dev);
+
+	if (md)
+		dm_get(md);
+
+	return md;
+}
+
 void *dm_get_mdptr(dev_t dev)
 {
 	struct mapped_device *md;
-- 
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