if_slowtimo_data
struct if_slowtimo_data *isd = ifp->if_slowtimo_data;
ifp->if_slowtimo_data = NULL; /* paraonia */
struct if_slowtimo_data *isd = ifp->if_slowtimo_data;
struct if_slowtimo_data *isd =
container_of(work, struct if_slowtimo_data, isd_work);
struct if_slowtimo_data *isd = ifp->if_slowtimo_data;
struct if_slowtimo_data *isd;
ifp->if_slowtimo_data = isd;
struct if_slowtimo_data *if_slowtimo_data; /* :: */