Hi Zach,

On 10/22/22 00:32, Zach OKeefe wrote:
> From: Zach O'Keefe <zokeefe@google.com>
> 
> EINVAL is an overloaded error code for madvise(2) and it's not clear
> under what context it means "advice is not valid" vs another error.
> 
> Explicitly document that madvise(0, 0, advice) can reliably be used to
> probe for kernel support for "advice", returning zero iff "advice" is
> supported by the kernel.
> 
> Signed-off-by: Zach O'Keefe <zokeefe@google.com>

Patch applied.

Thanks,

Alex

> ---
>   man2/madvise.2 | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/man2/madvise.2 b/man2/madvise.2
> index 64f788ace..df3413cc8 100644
> --- a/man2/madvise.2
> +++ b/man2/madvise.2
> @@ -790,6 +790,11 @@ that are not mapped, the Linux version of
>   ignores them and applies the call to the rest (but returns
>   .B ENOMEM
>   from the system call, as it should).
> +.PP
> +.IR madvise(0,\ 0,\ advice)
> +will return zero iff
> +.I advice
> +is supported by the kernel and can be relied on to probe for support.
>   .\" .SH HISTORY
>   .\" The
>   .\" .BR madvise ()

-- 
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