OVERLAY_F_DEGRADED
if ((odd->odd_flags & OVERLAY_F_DEGRADED) != 0) {
if (odd->odd_flags & OVERLAY_F_DEGRADED)
odd->odd_flags |= OVERLAY_F_DEGRADED;
if (!(odd->odd_flags & OVERLAY_F_DEGRADED))
odd->odd_flags &= ~OVERLAY_F_DEGRADED;
if (odd->odd_flags & OVERLAY_F_DEGRADED)