Function sys_io_uring_enter 

pub fn sys_io_uring_enter(
    locked: &mut Locked<Unlocked>,
    current_task: &CurrentTask,
    fd: FdNumber,
    to_submit: u32,
    min_complete: u32,
    flags: u32,
    _sig: UserRef<SigSet>,
    sigset_size: usize,
) -> Result<u32, Errno>