Re: [patch 2/2] x86 amd fix cmpxchg read acquire barrier

[Alan Cox]

> Good point. I should probably configure this as "nothing" unless
> 
> #ifdef CONFIG_X86_64
> #if (defined(CONFIG_GENERIC_CPU) || defined(CONFIG_MK8))
> ...
> #endif
> #endif

Is the erratum only present in 64bit mode ?

Really this needs someone with knowledge of the erratum to characterise
it accurately and the workarounds.
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