SET_DMAATTR
SET_DMAATTR(attr_p, lo, hi, -1, count_max);
SET_DMAATTR(attr_p, lo, hi, -1, count_max);
SET_DMAATTR(attrp, lo, hi, nocross, count_max);
SET_DMAATTR(attr_p, lo, hi, -1, count_max);
SET_DMAATTR(attr_p, lo, hi, -1, count_max);
SET_DMAATTR(attrp, lo, hi, nocross, count_max);