Re: [PATCH tip/core/rcu 8/9] nohz_full: Add full-system-idle statemachine

[Paul E. McKenney]

On Sat, Sep 07, 2013 at 01:22:57PM +0200, Geert Uytterhoeven wrote:
> On Fri, Sep 6, 2013 at 8:50 PM, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> > On Fri, Sep 6, 2013 at 7:30 PM, Paul E. McKenney
> > <paulmck@xxxxxxxxxxxxxxxxxx> wrote:
> >>> Furthermore, it seems only hexagon, metag, mips, and x86 set NR_CPUS to 1
> >>> if !SMP. On other architectures, NR_CPUS is not defined and presumed to be 0.
> >>
> >> Would it make sense to require that NR_CPUS=1 for !SMP?
> >
> > Yes, this looks reasonable to me.
> 
> Perhaps we can invert the logic and define only NR_CPUS in arch-specific
> code, and derive SMP from NR_CPUS != 1 in generic code?

If we always had NR_CPUS defined, that might be a good way to go.
We would of course need acks from the various arch maintainers.  I am
guessing that we are OK for m68k.  ;-)

							Thanx, Paul

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