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    SubjectRe: [PATCHv3 09/17] x86/mm: Implement page_keyid() using page_ext
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    > +int page_keyid(const struct page *page)
    > +{
    > + if (mktme_status != MKTME_ENABLED)
    > + return 0;
    > +
    > + return lookup_page_ext(page)->keyid;
    > +}
    > +EXPORT_SYMBOL(page_keyid);

    Please start using a proper X86_FEATURE_* flag for this. It will give
    you all the fancy static patching that you are missing by doing it this way.


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