On Tue, 2011-07-19 at 08:51 +0200, Eric Dumazet wrote:

> > +           case BPF_S_ANC_CPU:
> > +#ifdef CONFIG_SMP
> > +                   /*
> > +                    * PACA ptr is r13:
> > +                    * raw_smp_processor_id() = local_paca->paca_index
> > +                    */
> 
> This could break if one day linux supports more than 65536 cpus :)
> 
> > +                   PPC_LHZ_OFFS(r_A, 13,
> > +                                offsetof(struct paca_struct, paca_index));
> > +#else
> > +                   PPC_LI(r_A, 0);
> > +#endif
> > +                   break;

As would our implementation of raw_smp_processor_id() and our
spinlocks :-) I don't think we need to fix that -now- but you are
welcome to add something like a
BUILD_BUG_ON(sizeof(local_paca->paca_index) != 2); as a reminder :-)

Cheers,
Ben.


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