Re: [PATCH 1/2] FRV: Implement atomic64_t

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxx> wrote:

> Good point. I've done a simple:
> 
> u64 atomic64_read(atomic64_t *ptr)
> {
>         return cmpxchg8b(ptr, 0, 0);
> }

-1 is better i guess, as that way we can avoid dirtying the 
cacheline. Zero is way too common for atomics.

	Ingo
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