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    SubjectRe: [PATCH] x86: Create clflush() inline, remove hardcoded wbinvd
    Andi Kleen wrote:
    >> The main reason is that everyone seems to invoke it either incorrectly
    > Where is it incorrect?

    Using "r" or "m" (as opposed as "+m") gives gcc the wrong dependency
    information, and it could, at least in theory, cause memory references
    to be moved around it -- especially when using "r".

    -hpa
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