Re: [Xen-devel] [PATCH 05/17] xen: arm32: resync atomics with (almost) v3.14-rc7

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2014-03-20 at 17:27 +0000, Julien Grall wrote:
> Hi Ian,
> 
> On 03/20/2014 03:45 PM, Ian Campbell wrote:
> > diff --git a/xen/include/asm-arm/arm32/atomic.h 
> > b/xen/include/asm-arm/arm32/atomic.h
> > index 3f024d4..d309f66 100644
> > --- a/xen/include/asm-arm/arm32/atomic.h
> > +++ b/xen/include/asm-arm/arm32/atomic.h
> > @@ -21,6 +21,7 @@ static inline void atomic_add(int i, atomic_t *v)
> >     unsigned long tmp;
> >     int result;
> >  
> > +   prefetchw(&v->counter);
> 
> Xen on ARM doesn't provide prefetch* helper. Shall we implement it?

It comes from generic code after the first patch in this series.

Ian.



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