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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.

Paul.
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