228             return Err(SystemError::EINVAL);  in futex_wait()
357             return Err(SystemError::EINVAL);  in futex_wake()
367         let bucket_mut = binding.get_mut(&key).ok_or(SystemError::EINVAL)?;  in futex_wake()
394             return Err(SystemError::EINVAL);  in futex_requeue()
415             return Err(SystemError::EINVAL);  in futex_requeue()
432             let bucket_1_mut = futex_data_guard.get_mut(&key1).ok_or(SystemError::EINVAL)?;  in futex_requeue()
436                 let bucket_1_mut = futex_data_guard.get_mut(&key1).ok_or(SystemError::EINVAL)?;  in futex_requeue()
441                             futex_data_guard.get_mut(&key2).ok_or(SystemError::EINVAL)?;  in futex_requeue()
478         let bucket1 = futex_data_guard.get_mut(&key1).ok_or(SystemError::EINVAL)?;  in futex_wake_op()
488                     let bucket2 = futex_data_guard.get_mut(&key2).ok_or(SystemError::EINVAL)?;  in futex_wake_op()
512             return Err(SystemError::EINVAL);  in get_futex_key()
682             return Err(SystemError::EINVAL);  in set_robust_list()
721         let robust_list_head = (*pcb.get_robust_list()).ok_or(SystemError::EINVAL)?;  in get_robust_list()
775                 return Err(SystemError::EINVAL);  in handle_futex_death()