wdc_vul_sn65x_smart_t
.nf_off = offsetof(wdc_vul_sn65x_smart_t, sm_##f), \
.nf_len = sizeof (((wdc_vul_sn65x_smart_t *)NULL)->sm_##f)
.nlfi_min = sizeof (wdc_vul_sn65x_smart_t)
.nlpi_len = sizeof (wdc_vul_sn65x_smart_t)