IB_WC_WITH_SMAC
wc->wc_flags |= IB_WC_WITH_SMAC;
wc->wc_flags |= IB_WC_GRH | IB_WC_WITH_SMAC;
entry->wc_flags |= IB_WC_WITH_SMAC;
wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
wc[i].wc_flags |= IB_WC_WITH_SMAC;