__VC4_MADV_PURGED
bo->madv = __VC4_MADV_PURGED;
case __VC4_MADV_PURGED:
WARN_ON(bo->madv != __VC4_MADV_PURGED);
args->retained = bo->madv != __VC4_MADV_PURGED;
if (bo->madv != __VC4_MADV_PURGED)
if (!WARN_ON(bo->madv == __VC4_MADV_PURGED))