netmap_krings_create
int ret = netmap_krings_create(na, 0);
int netmap_krings_create(struct netmap_adapter *na, u_int tailroom);
int error = netmap_krings_create(na, 0);
return netmap_krings_create(na, 0);
error = netmap_krings_create(na, 0);
error = netmap_krings_create(ona, 0);
error = netmap_krings_create(na, tailroom);