XFS_SB_VERSION2_ATTR2BIT
if (mp->m_sb.sb_features2 & XFS_SB_VERSION2_ATTR2BIT)
sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
XFS_SB_VERSION2_ATTR2BIT | \
XFS_SB_VERSION2_ATTR2BIT | \
features_mask = cpu_to_be32(XFS_SB_VERSION2_ATTR2BIT);