# Re: \[PATCH 1/2\] tools/virtio: add dma barrier stubs

- From: Jason Wang \<hidden\>
- Date: 2018-07-30 07:28:09 
- List: virtualization
- Page: https://ratatoskr.run/virtualization/2018/07/5345218
- Thread: https://ratatoskr.run/lkml/2018/07/5342112/t.md

```text


On 2018年07月25日 21:45, Michael S. Tsirkin wrote:
> Fixes: 55e49dc43a8 ("virtio_ring: switch to dma_XX barriers for rpmsg")
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>   tools/virtio/asm/barrier.h | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/virtio/asm/barrier.h b/tools/virtio/asm/barrier.h
> index 0ac3caf90877..d0351f83aebe 100644
> --- a/tools/virtio/asm/barrier.h
> +++ b/tools/virtio/asm/barrier.h
> @@ -13,8 +13,8 @@
>   } while (0);
>   /* Weak barriers should be used. If not - it's a bug */
>   # define mb() abort()
> -# define rmb() abort()
> -# define wmb() abort()
> +# define dma_rmb() abort()
> +# define dma_wmb() abort()
>   #else
>   #error Please fill in barrier macros
>   #endif

Reviewed-by: Jason Wang <redacted>
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```