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SubjectRe: [PATCH 3/8] arm64: Extend support for CONFIG_FUNCTION_ALIGNMENT
On Tue, Jan 10, 2023 at 09:35:18PM +0100, Peter Zijlstra wrote:
> On Mon, Jan 09, 2023 at 01:58:23PM +0000, Mark Rutland wrote:
>
> > diff --git a/arch/arm64/include/asm/linkage.h b/arch/arm64/include/asm/linkage.h
> > index 1436fa1cde24d..df18a3446ce82 100644
> > --- a/arch/arm64/include/asm/linkage.h
> > +++ b/arch/arm64/include/asm/linkage.h
> > @@ -5,8 +5,14 @@
> > #include <asm/assembler.h>
> > #endif
> >
> > -#define __ALIGN .align 2
> > -#define __ALIGN_STR ".align 2"
> > +#if CONFIG_FUNCTION_ALIGNMENT > 0
> > +#define ARM64_FUNCTION_ALIGNMENT CONFIG_FUNCTION_ALIGNMENT
> > +#else
> > +#define ARM64_FUNCTION_ALIGNMENT 4
> > +#endif
> > +
> > +#define __ALIGN .balign ARM64_FUNCTION_ALIGNMENT
> > +#define __ALIGN_STR ".balign " #ARM64_FUNCTION_ALIGNMENT
>
> Isn't that much the same as having ARM64 select FUNCTION_ALIGNMENT_4B
> and simply removing all these lines and relying on the default
> behaviour?

Yes, it is.

I was focussed on obviously retaining the existing semantic by default, and I
missed that was possible by selecting FUNCTION_ALIGNMENT_4B.

Thanks,
Mark.

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