Function sys_io_getevents 

pub fn sys_io_getevents(
    _locked: &mut Locked<Unlocked>,
    current_task: &CurrentTask,
    ctx_id: aio_context_t,
    min_nr: i64,
    nr: i64,
    events_ref: UserRef<io_event>,
    user_timeout: TimeSpecPtr,
) -> Result<i32, Errno>