dm: export struct dm_dev

Split struct dm_dev in two and publish the part that other targets need in
include/linux/device-mapper.h.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 1e59a0b0a78a..65f2f562220e 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -25,13 +25,10 @@
 /*
  * List of devices that a metadevice uses and should open/close.
  */
-struct dm_dev {
+struct dm_dev_internal {
         struct list_head list;
-
         atomic_t count;
-        int mode;
-        struct block_device *bdev;
-        char name[16];
+        struct dm_dev dm_dev;
 };
 
 struct dm_table;