Re: [PATCH v1 1/2] kstrtox: Make _parse_integer() take variadic arguments

[Andy Shevchenko]

On Wed, Jun 03, 2026 at 11:37:50AM +0100, David Laight wrote:
> On Tue,  2 Jun 2026 22:29:46 +0200
> Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> 
> > Instead of having different functions that just use default parameters,
> > combine those to use variadic arguments, so the user may call it using
> > the same name.
> 
> Adding a default final parameter can be done generically:

Only one?

> #define one(v) v
> #define first(v, ...) v
> #define dflt(d, ...) first(__VA_OPT__(one(__VA_ARGS__) ,) d)
> 
> int foo(int, int);
> #define foo(a, ...) foo(a, dflt(42, ## __VA_ARGS__))
> 
> See: https://godbolt.org/z/x5aao7reK

I know, we support some GCC versions that do not provide it.

551d44200152 ("default_gfp(): avoid using the "newfangled" __VA_OPT__ trick")

-- 
With Best Regards,
Andy Shevchenko