V_bridge_rtnode_zone
brt = uma_zalloc(V_bridge_rtnode_zone, M_NOWAIT | M_ZERO);
uma_zfree(V_bridge_rtnode_zone, brt);
uma_zfree(V_bridge_rtnode_zone, brt);
V_bridge_rtnode_zone = uma_zcreate("bridge_rtnode",
uma_zdestroy(V_bridge_rtnode_zone);