sw_tdt           1109 dev/pci/if_em.c 	uint16_t sw_tdt;
sw_tdt           1115 dev/pci/if_em.c 	sw_tdt = sc->next_avail_tx_desc;
sw_tdt           1117 dev/pci/if_em.c 	while (hw_tdt != sw_tdt) {