Re: [PATCH] PERF(kernel): Cleanup power events V2

["Rafael J. Wysocki" <rjw@xxxxxxx>]

On Tuesday, October 26, 2010, Pierre Tardy wrote:
> On Tue, Oct 26, 2010 at 12:58 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> > On Tue, 2010-10-26 at 11:56 -0500, Pierre Tardy wrote:
> >>
> >> +       trace_runtime_pm_usage(dev, atomic_read(&dev->power.usage_count)+1);
> >>         atomic_inc(&dev->power.usage_count);
> >
> > That's terribly racy..
> >
> I know. I'm not proud of this.. As I said, this is preliminary patch.
> We dont really need to have this prev_usage. This is just for debug.
> It mayprobably endup with something like:
> 
>          atomic_inc(&dev->power.usage_count);
> +       trace_power_device_usage(dev);

Well, please tell me what you're trying to achieve.

Thanks,
Rafael
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