Re: [PATCH] compiler: enable CONFIG_OPTIMIZE_INLINING forcibly

[Linus Torvalds]

On Wed, Oct 2, 2019 at 5:56 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>
> >
> > Then use the C preprocessor to force the inlining.  I'm sorry it's not
> > as pretty as static inline functions.
>
> Which makes us lose the baby^H^H^H^Htype checking performed
> on function parameters, requiring to add more ugly checks.

I'm 100% agreed on this.

If the inline change is being pushed by people who say "you should
have used macros instead if you wanted inlining", then I will just
revert that stupid commit that is causing problems.

No, the preprocessor is not the answer.

That said, code that relies on inlining for _correctness_ should use
"__always_inline" and possibly even have a comment about why.

But I am considering just undoing commit 9012d011660e ("compiler:
allow all arches to enable CONFIG_OPTIMIZE_INLINING") entirely. The
advantages are questionable, and when the advantages are balanced
against actual regressions and the arguments are "use macros", that
just shows how badly thought out this was.

                Linus