int channel_ust_copy(struct ltt_ust_channel *dst,
struct ltt_ust_channel *src);
int channel_ust_disable(struct ltt_ust_session *usession,
int channel_ust_copy(struct ltt_ust_channel *dst,
struct ltt_ust_channel *src);
int channel_ust_disable(struct ltt_ust_session *usession,