Re: [PATCH 2/7] perf: New helper function for pmu name

[Paul Mundt <lethal@linux-sh.org>]

On Wed, Oct 06, 2010 at 05:50:26PM +0200, Robert Richter wrote:
> On 06.10.10 09:30:41, Paul Mundt wrote:
> > On Wed, Oct 06, 2010 at 03:18:25PM +0200, Robert Richter wrote:
> > > So, I am also fine with implementing a generic perf_pmu_name() for sh
> > > and then derive the oprofile cpu_type string from it in the oprofile
> > > code.
> > > 
> > Again, this is unacceptable.
> 
> Paul,
> 
> maybe I misunderstood you, but isn't this you preferred solution? We
> make perf_pmu_name() part of the generic i/f and then derive the
> oprofile name from the pmu name provided by perf.
> 
Perhaps we've misunderstood each other. I thought what you meant is that
we would carry a special API deviation in the architecture code or expose
the sh_pmu structure to generic code, both of which I have no interest
in. My preferred solution is that we provide a perf_pmu_name() in the
generic perf code as a __weak and then override it in the sh code, where
we have sh_pmu visibility. This way we aren't providing any special APIs
and sh_pmu remains constrained to the sh perf events code.