int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
struct ltt_ust_channel *uchan);
int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
struct ltt_ust_channel *uchan);
int ust_app_enable_channel_glb(struct ltt_ust_session *usess,