Function sys_perf_event_open 

pub fn sys_perf_event_open(
    locked: &mut Locked<Unlocked>,
    current_task: &CurrentTask,
    attr: UserRef<perf_event_attr>,
    tid: tid_t,
    cpu: i32,
    group_fd: FdNumber,
    _flags: u64,
) -> Result<SyscallResult, Errno>