btrfs: sysfs: remove MIXED_BACKREF feature file

This feature has been the default for about 13 year. At this point it's
safe to consider it an indispensable feature of BTRFS as such there's
no need to advertise it in sysfs. Remove the global sysfs feature file,
the per-filesystem feature file has never been there.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index c6307b111c2c758a266d340eec15d52408c5ba33..73f99a9647d6e70fd538bd392e857d65f5c3ee1c 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -276,7 +276,6 @@ static umode_t btrfs_feature_visible(struct kobject *kobj,
        return mode;
 }
 
-BTRFS_FEAT_ATTR_INCOMPAT(mixed_backref, MIXED_BACKREF);
 BTRFS_FEAT_ATTR_INCOMPAT(default_subvol, DEFAULT_SUBVOL);
 BTRFS_FEAT_ATTR_INCOMPAT(mixed_groups, MIXED_GROUPS);
 BTRFS_FEAT_ATTR_INCOMPAT(compress_lzo, COMPRESS_LZO);
@@ -308,7 +307,6 @@ BTRFS_FEAT_ATTR_COMPAT_RO(verity, VERITY);
  *                               can be changed on a mounted filesystem.
  */
 static struct attribute *btrfs_supported_feature_attrs[] = {
-       BTRFS_FEAT_ATTR_PTR(mixed_backref),
        BTRFS_FEAT_ATTR_PTR(default_subvol),
        BTRFS_FEAT_ATTR_PTR(mixed_groups),
        BTRFS_FEAT_ATTR_PTR(compress_lzo),