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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. (
> 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.
> Suggested-by: Sam Ravnborg <>
> Signed-off-by: Masahiro Yamada <>

Nice work!

For the full series:
Acked-by: Sam Ravnborg <>

Have you considered to warn if generic-y contains a header listed
in mandatory-y - to prevent that they sneak back in.
And to catch when we lift a header from available to mandatory.


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