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Re: [Xen-devel] [PATCH v5 03/13] arm64: define DMA_ERROR_CODE



On Thu, 5 Sep 2013, Catalin Marinas wrote:
> On Thu, Aug 29, 2013 at 07:32:24PM +0100, Stefano Stabellini wrote:
> > Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > CC: catalin.marinas@xxxxxxx
> > CC: will.deacon@xxxxxxx
> > ---
> >  arch/arm64/include/asm/dma-mapping.h |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/arm64/include/asm/dma-mapping.h 
> > b/arch/arm64/include/asm/dma-mapping.h
> > index 8d18100..c2cb8a0 100644
> > --- a/arch/arm64/include/asm/dma-mapping.h
> > +++ b/arch/arm64/include/asm/dma-mapping.h
> > @@ -25,6 +25,7 @@
> >  
> >  #define ARCH_HAS_DMA_GET_REQUIRED_MASK
> >  
> > +#define DMA_ERROR_CODE     (~0)
> 
> I wonder why this isn't more generic. It looks like most (all?)
> architectures define it in the same way.

Actually it's defined as 0 on x86 and ia64.
All the others define it as ~0.

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