user_event_enabler_write
result = user_event_enabler_write(user_mm, &enabler, false, &attempt);
static int user_event_enabler_write(struct user_event_mm *mm,
user_event_enabler_write(mm, enabler, true, &attempt);
user_event_enabler_write(mm, enabler, true, &attempt);
*write_result = user_event_enabler_write(user_mm, enabler, false,