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    SubjectRe: [RFC, Announce] Unified x86 architecture, arch/x86
    Alan Cox wrote:
    > On Fri, 20 Jul 2007 18:38:39 -0400
    > Jeff Garzik <jeff@garzik.org> wrote:
    >
    >> I agree with Andi... it's quite nice to be able to leave some arch/i386
    >> stuff, and not carry it over to arch/x86-64.
    >
    > Its easy enough to push that stuff into arch/x86/legacy and have one
    > subdirectory of stuff to pull in for ancient systems.

    The other thing is that "legacy" in this context is fungible. No IOMMU
    was legacy until the Intel x86-64 chips came out, and I can promise you
    that some legacy code will be necessary once we start seeing VIA and
    others come out with embedded x86-64.

    On the other hand, it's pretty bloody safe to assume that we'll never
    see an x86-64 chip without CPUID, CMOV, FXSAVE, SSE-2, CMPXCHG, etc.

    -hpa
    -
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