HPPA_PGAOFF
if ((va & HPPA_PGAOFF) != (pva & HPPA_PGAOFF) && writeable) {
if ((va & HPPA_PGAOFF) != (pva & HPPA_PGAOFF) &&
newva = (*va & HPPA_PGAMASK) | (fo & HPPA_PGAOFF);