[RFC/PATCH] powerpc: Move CPM command handling into the cpm drivers

[Scott Wood]

On Fri, Nov 23, 2007 at 12:51:21AM +0300, Vitaly Bordug wrote:
> Even that might be not enough - we may have simultaneous call of this func
> in non-smp case...

Do you really think that every piece of code that uses spinlocks in the
kernel is broken on non-SMP?

> I was thinking of some kind of refcount, so one that is going to issue CPM
> command, must do say pq_cpmp_get() and another driver won't be able to
> mangle with cpcr while it's not done with previous request.

How on earth are you going to effect mutual exclusion using reference
counting?

-Scott