int channel_ust_disable(struct ltt_ust_session *usession,
struct ltt_ust_channel *uchan, int sock);
int channel_ust_enable(struct ltt_ust_session *usession,
int channel_ust_disable(struct ltt_ust_session *usession,
struct ltt_ust_channel *uchan, int sock);
int channel_ust_enable(struct ltt_ust_session *usession,