ETR_SG_PTRS_PER_PAGE
unsigned long nr_sglinks = nr_sgpages / (ETR_SG_PTRS_PER_PAGE - 1);
if (nr_sglinks && (nr_sgpages % (ETR_SG_PTRS_PER_PAGE - 1) < 2))
if (sgtentry == ETR_SG_PTRS_PER_PAGE - 1) {
if (!INC_IDX_ROUND(sgtentry, ETR_SG_PTRS_PER_PAGE)) {