Re: [PATCH] CPU time clock support in clock_* syscalls

[Andrew Morton <akpm@osdl.org>]

Roland McGrath <roland@redhat.com> wrote:
>
> +int posix_cpu_clock_settime(clockid_t which_clock,
>  +			    const struct timespec __user *tp)
>  +{
>  +	/*
>  +	 * You can never reset a CPU clock, but we check for other errors
>  +	 * in the call before failing with EPERM.
>  +	 */
>  +	int error = check_clock(which_clock);
>  +	if (error == 0) {
>  +		struct timespec new_tp;
>  +		error = -EPERM;
>  +		if (copy_from_user(&new_tp, tp, sizeof *tp))
>  +			error = -EFAULT;
>  +	}
>  +	return error;
>  +}

This will always return an error.