Re: [PATCH 1/1] prefetch result for ARM64 atomic ops

[Joe Perches]

On Mon, 2014-04-14 at 13:55 -0400, Pranith Kumar wrote:

Are there some benchmark comparison results
you neglected to attach?

> diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h
[]
> @@ -235,6 +244,7 @@ static inline long atomic64_cmpxchg(atomic64_t
> *ptr, long old, long new)
>      unsigned long res;
> 
>      smp_mb();
> +    prefetchw(&v->counter);

Does this compile?


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