md: dm-raid should call helper function to clear rdev.

dm-raid currently open-codes the freeing of some members of
and rdev.  It is more maintainable to have it call common code
from md.c which does this for all call-sites.

So remove free_disk_sb to md_rdev_clear, export it, and use it in
dm-raid.c

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 68965e66324..73a068da10d 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -155,10 +155,7 @@ static void context_free(struct raid_set *rs)
         for (i = 0; i < rs->md.raid_disks; i++) {
                 if (rs->dev[i].meta_dev)
                         dm_put_device(rs->ti, rs->dev[i].meta_dev);
-                if (rs->dev[i].rdev.sb_page)
-                        put_page(rs->dev[i].rdev.sb_page);
-                rs->dev[i].rdev.sb_page = NULL;
-                rs->dev[i].rdev.sb_loaded = 0;
+                md_rdev_clear(&rs->dev[i].rdev);
                 if (rs->dev[i].data_dev)
                         dm_put_device(rs->ti, rs->dev[i].data_dev);
         }