check_EXIT(const struct ofpact_null *a OVS_UNUSED,
           const struct ofpact_check_params *cp OVS_UNUSED)
{
    return 0;
}
check_EXIT(const struct ofpact_null *a OVS_UNUSED,
           const struct ofpact_check_params *cp OVS_UNUSED)
{
    return 0;
}