On Sat, Mar 02, 2024 at 03:17:32AM +0200, Andy Shevchenko wrote: > Thu, Feb 29, 2024 at 08:44:37PM -0800, Kees Cook kirjoitti: > > The __is_constexpr() macro is dark magic. Shed some light on it with > > a comment to explain how and why it works. > > I was under impression that somebody did it already once and it fell through > cracks when has been moved (?) to compiler.h. I tried to do it before (see the v1). > > Ah, now I see it, https://lore.kernel.org/all/YKeghxRY4FeOKuwb@xxxxxxxxxxxxxxxxxx/. > It was asked, but till now never fulfilled (maybe Reported-by:/Closes: tag?). Sure! akpm was hardly the first to ask about it, but yeah, makes for some good tags. Reported-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Closes: https://lore.kernel.org/all/20210520134112.ee15f156f1b7dbd3d8f16471@xxxxxxxxxxxxxxxxxxxx/ :) > And explanation before was given here: > https://stackoverflow.com/questions/49481217/linux-kernels-is-constexpr-macro. Sure, but I wanted something that lived with the macro and everyone was happy with the details. -Kees -- Kees Cook
