netmap_bdg_detach_common
netmap_bdg_detach_common(b, bna->up.bdg_port,
netmap_bdg_detach_common(b, vpna->bdg_port, -1);
void netmap_bdg_detach_common(struct nm_bridge *b, int hw, int sw);
netmap_bdg_detach_common(b, vpna->bdg_port, -1);