threshold_add
enabled_ops[THERMAL_GENL_EVENT_THRESHOLD_ADD] = !!ops->threshold_add;
return ops->threshold_add(nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]),
int (*threshold_add)(int tz_id, int temperature, int direction, void *arg);
.events.threshold_add = threshold_add,