Re: [Xen-devel] [PATCH v2 34/34] xen/io: use virt_xxx barriers

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 31/12/15 19:10, Michael S. Tsirkin wrote:
> include/xen/interface/io/ring.h uses
> full memory barriers to communicate with the other side.
> 
> For guests compiled with CONFIG_SMP, smp_wmb and smp_mb
> would be sufficient, so mb() and wmb() here are only needed if
> a non-SMP guest runs on an SMP host.
> 
> Switch to virt_xxx barriers which serve this exact purpose.

Acked-by: David Vrabel <david.vrabel@xxxxxxxxxx>

David
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