On Sun, Oct 30, 2022 at 4:44 AM Alejandro Colomar <alx.manpages@xxxxxxxxx> wrote: > > Hi Zach, > > On 10/22/22 00:32, Zach OKeefe wrote: > > From: Zach O'Keefe <zokeefe@xxxxxxxxxx> > > > > 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@xxxxxxxxxx> > > Patch applied. Thank you! Best, Zach > 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 () > > -- > <http://www.alejandro-colomar.es/>
