nref              776 dev/ic/midway.c     sc->txslot[lcv].nref = 0;
nref             1227 dev/ic/midway.c     sc->txslot[0].nref++;	/* bump reference count */
nref             1250 dev/ic/midway.c   sc->txslot[sc->txvc2slot[vci]].nref--;
nref              137 dev/ic/midwayvar.h     u_int32_t nref;		/* # of VCs using this channel */