Re: PATCH? hrtimer_wakeup: fix a theoretical race wrtrt_mutex_slowlock()

[Benjamin Herrenschmidt]

On Mon, 2006-11-06 at 07:35 -0500, Steven Rostedt wrote:

> It is relevant.  In powerpc, can one write happen before another write?
> 
> 
>   x = 1;
>   barrier();  (only compiler barrier)
>   b = 2;
> 
> 
> And have CPU 2 see b=2 before seeing x=1?

Yes. Definitely.

> If so, then I guess this is indeed a bug on powerpc.

Ben.


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