check_SET_ETH_SRC(const struct ofpact_mac *a OVS_UNUSED,
                  const struct ofpact_check_params *cp OVS_UNUSED)
{
    return 0;
}
check_SET_ETH_SRC(const struct ofpact_mac *a OVS_UNUSED,
                  const struct ofpact_check_params *cp OVS_UNUSED)
{
    return 0;
}