Re: [PATCH 1/1] man/man2/request_key.2: Add missing GNU size forward-declarations

[Alejandro Colomar <alx@kernel.org>]

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Hi Martin,

> Date: 2026-09-15 12:28:31+0200
> From: Martin Uecker <uecker@tugraz.at>
>
[...]
> > > But then again, it seems very unlikely that writes
> > > 
> > > enum { MAX_DIMS = 100 };
> > > 
> > > void i(int a[MAX_DIMS], int MAX_DIMS);
> > > 
> > > with the intention that the first MAX_DIMS actually
> > > refers to the global variable and not to the parameter.
> > > If such code exits, it is  almost certainly already an
> > > unintentional error.
> > 
> > And you would not diagnose such an unintentional error?
> 
> This would not be a new error, but an old one.
> Nobody felt the need to diagnose this in the last four decades.
> And after the change, it would not be an error, so there seems
> even less reason to diagnose it.

If retroactive scoping is added but optional (to allow small compilers
to live without it), then it might become a problem.  Porting code using
it to compilers not supporting it might successfully compile, but have
different semantics.

[...]
> 
> QoI might result in diagnostic if it turns out to be a problem.

But I would be okay, since indeed QoI would come to save us.

> But if it were a real issue, we would have the diagnostic already.


Cheers,
Alex

> 
> Martin

-- 
<https://www.alejandro-colomar.es>

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