linux-kernel - Re: [PATCH 1/2] tools/virtio: add dma barrier stubs

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Date:   Mon, 30 Jul 2018 15:28:01 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:     khandual@...ux.vnet.ibm.com,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 1/2] tools/virtio: add dma barrier stubs



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@...hat.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 <jasowang@...hat.com>