dc_npoll
ifp->if_npoll = dc_npoll;
ifpoll_compat_setup(&sc->dc_npoll, NULL, NULL, device_get_unit(dev),
static void dc_npoll (struct ifnet *, struct ifpoll_info *);
if (sc->dc_npoll.ifpc_stcount-- == 0) {
sc->dc_npoll.ifpc_stcount = sc->dc_npoll.ifpc_stfrac;
int cpuid = sc->dc_npoll.ifpc_cpuid;
sc->dc_npoll.ifpc_stcount = 0;
sc->dc_npoll.ifpc_stcount = 0;
struct ifpoll_compat dc_npoll;