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    SubjectRe: [PATCH] simplify update_times (avoid jiffies/jiffies_64 aliasing problem)
    Andi Kleen writes:

    > Also I assume Atsushi-san did the patch because he saw a real problem?

    Yes, one which I also saw on PPC. The compiler (gcc-4) emits loads
    for jiffies, jiffies64 and wall_jiffies before storing the incremented
    jiffies64 value back.

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