md: separate flags for superblock changes

The mddev->flags are used for different purposes. There are a lot of
places we check/change the flags without masking unrelated flags, we
could check/change unrelated flags. These usage are most for superblock
write, so spearate superblock related flags. This should make the code
clearer and also fix real bugs.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 6d53810963f7..953159d9a825 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2011,7 +2011,7 @@ static int super_load(struct md_rdev *rdev, struct md_rdev *refdev)
                 sb->compat_features = cpu_to_le32(FEATURE_FLAG_SUPPORTS_V190);
 
                 /* Force writing of superblocks to disk */
-                set_bit(MD_CHANGE_DEVS, &rdev->mddev->flags);
+                set_bit(MD_SB_CHANGE_DEVS, &rdev->mddev->sb_flags);
 
                 /* Any superblock is better than none, choose that if given */
                 return refdev ? 0 : 1;
@@ -3497,7 +3497,7 @@ static void rs_update_sbs(struct raid_set *rs)
         struct mddev *mddev = &rs->md;
         int ro = mddev->ro;
 
-        set_bit(MD_CHANGE_DEVS, &mddev->flags);
+        set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
         mddev->ro = 0;
         md_update_sb(mddev, 1);
         mddev->ro = ro;