On 11/07/2017 01:23 PM, Breno Leitao wrote:
> Currently pkey_alloc() syscall has two arguments, and the very first
> argument is still not supported as in kernel 4.14-rc8 and should be set
> to zero, as showed in the following syscall implementation:
>
> SYSCALL_DEFINE2(pkey_alloc, unsigned long, flags, ...)
> {
> int pkey;
> int ret;
>
> /* No flags supported yet. */
> if (flags)
> return -EINVAL;
>
> This behaviour is also documented correctly in the kernel documentation
> as Documentation/x86/protection-keys.txt
>
> The second argument is the one that should specify the page access
> rights.
>
> This patch fixes the manpage to describe how the code behaves.
Thanks, Breno. Patch applied.
Cheers,
Michael
> Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
> ---
> man2/pkey_alloc.2 | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/man2/pkey_alloc.2 b/man2/pkey_alloc.2
> index 8e701961c..858f64ce6 100644
> --- a/man2/pkey_alloc.2
> +++ b/man2/pkey_alloc.2
> @@ -40,6 +40,12 @@ allocates a protection key (pkey) and allows it to be passed to
> The
> .BR pkey_alloc ()
> .I flags
> +argument is still not supported and should be set to "0".
> +.PP
> +The
> +.BR pkey_alloc ()
> +.I access_rights
> +.BR
> argument may contain zero or more disable operations:
> .TP
> .B PKEY_DISABLE_ACCESS
>
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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