Re: [PATCH RFC tip/core/rcu] rcu: direct algorithmic SRCUimplementation

[Peter Zijlstra]

On Thu, 2012-02-16 at 05:50 -0500, Mathieu Desnoyers wrote:
> > Ah, so something like this?
> > 
> >       ACCESS_ONCE(this_cpu_ptr(sp->per_cpu_ref)->c[idx]) += 
> >               SRCU_USAGE_COUNT + 1;
> > 
> > Now that you mention it, this does look nicer, applied here and to
> > srcu_read_unlock().
> 
> I think Peter refers to __this_cpu_add(). 

I'm not sure that implies the ACCESS_ONCE() thing
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