/* 52 */
LTTNG_ERR_KERN_LIST_FAIL = 53, /* Kernel listing events failed */
LTTNG_ERR_UST_CALIBRATE_FAIL = 54, /* UST calibration failed */
- /* 55 */
+ LTTNG_ERR_UST_EVENT_ENABLED = 55, /* UST event already enabled. */
LTTNG_ERR_UST_SESS_FAIL = 56, /* UST create session failed */
LTTNG_ERR_UST_CHAN_EXIST = 57, /* UST channel already exist */
LTTNG_ERR_UST_CHAN_FAIL = 58, /* UST create channel failed */