Re: percpu: Implement this_cpu_add,sub,dec,inc_return

[Eric Dumazet <eric.dumazet@gmail.com>]

Le vendredi 19 novembre 2010 A  09:42 -0600, Christoph Lameter a A(C)crit :
> On Wed, 17 Nov 2010, Eric Dumazet wrote:
> 
> > diff --git a/include/linux/highmem.h b/include/linux/highmem.h
> > index b676c58..bb5db26 100644
> > --- a/include/linux/highmem.h
> > +++ b/include/linux/highmem.h
> > @@ -91,7 +91,7 @@ static inline int kmap_atomic_idx_push(void)
> >
> >  static inline int kmap_atomic_idx(void)
> >  {
> > -	return __get_cpu_var(__kmap_atomic_idx) - 1;
> > +	return __this_cpu_read(__kmap_atomic_idx) - 1;
> >  }
> >
> >  static inline int kmap_atomic_idx_pop(void)
> 
> This isnt a use case for this_cpu_dec right? Seems that your message was
> cut off?
> 


I wanted to show you the file were it was possible to use this_cpu_{dec|
inc}_return()


My patch on kmap_atomic_idx() doesnt need your new functions ;)

Thanks


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