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SubjectRe: [PATCH 2/3] kbuild: generate asm-generic wrappers if mandatory headers are missing
On Wed, Dec 05, 2018 at 08:28:05PM +0900, Masahiro Yamada wrote:
> Some time ago, Sam pointed out a certain degree of overwrap between
> generic-y and mandatory-y. (https://lkml.org/lkml/2017/7/10/121)
>
> I a bit tweaked the meaning of mandatory-y; now it defines the minimum
> set of ASM headers that all architectures must have.
>
> If arch does not have specific implementation of a mandatory header,
> Kbuild will let it fallback to the asm-generic one by automatically
> generating a wrapper. This will allow to drop lots of redundant
> generic-y defines.
>
> Previously, "mandatory" was used in the context of UAPI, but I guess
> this can be extended to kernel space ASM headers.

How useful is it to keep the generic-y behavior around at all vs making
everything useful mandatory?

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