int event_agent_enable(struct ltt_ust_session *usess, struct agent *agt,
struct lttng_event *event, struct lttng_filter_bytecode *filter,
char *filter_expression);
int event_agent_enable(struct ltt_ust_session *usess, struct agent *agt,
struct lttng_event *event, struct lttng_filter_bytecode *filter,
char *filter_expression);