[PATCH v2 02/11] perf core: export swevent hrtimer helpers

[Peter Zijlstra]

On Tue, Feb 25, 2014 at 02:33:26PM +1100, Michael Ellerman wrote:
> On Fri, 2014-14-02 at 22:02:06 UTC, Cody P Schafer wrote:
> > Export the swevent hrtimer helpers currently only used in events/core.c
> > to allow the addition of architecture specific sw-like pmus.
> 
> Peter, Ingo, can we get your ACK on this please?

How are they used? I saw some usage in patch 9 or so; but its not
explained anywhere. All patches have non-existent Changelogs and the few
comments that are there are pretty hardware specific.

So please do tell; what do you need this for?