txd_used          936 dev/pci/if_em.c 	u_int32_t	txd_lower, txd_used = 0, txd_saved = 0;
txd_used         1008 dev/pci/if_em.c 				if (txd_used == sc->num_tx_desc_avail) {
txd_used         1026 dev/pci/if_em.c 				txd_used++;
txd_used         1047 dev/pci/if_em.c 		sc->num_tx_desc_avail -= txd_used;