Re: [RFC] perf_events: support for uncore a.k.a. nest units

[Peter Zijlstra]

On Wed, 2010-04-21 at 22:12 +0000, Lin Ming wrote:
> +       ret = pmu->commit_txn(pmu);
> +       if (!ret) {
> +               pmu->stop_txn(pmu);
> +               return 0;
> +       }
>  
>  group_error:
> +       pmu->stop_txn(pmu); 

If you let commit_txn() also clear the state you can save some logic and
a method.

But yes, this looks good. If you don't remove the weak interface just
yet, you can do a patch per architecture that uses this (at least
powerpc and sparc do), and remove the weak thing at the end once all
users are gone.



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