netdev - Re: [PATCH net-next] virtio-net: fix build error when CONFIG

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Date:	Fri, 17 Jan 2014 17:51:32 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	Michael Dalton <mwdalton@...gle.com>,
	"David S. Miller" <davem@...emloft.net>
CC:	netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH net-next] virtio-net: fix build error when CONFIG_AVERAGE
 is not enabled

On 01/17/2014 05:27 PM, Michael Dalton wrote:
> Commit ab7db91705e9 ("virtio-net: auto-tune mergeable rx buffer size for
> improved performance") introduced a virtio-net dependency on EWMA.
> The inclusion of EWMA is controlled by CONFIG_AVERAGE. Fix build error
> when CONFIG_AVERAGE is not enabled by adding select AVERAGE to
> virtio-net's Kconfig entry.
>
> Build failure reported using config make ARCH=s390 defconfig.
>
> Signed-off-by: Michael Dalton <mwdalton@...gle.com>
> ---
>  drivers/net/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
> index b45b240..f342278 100644
> --- a/drivers/net/Kconfig
> +++ b/drivers/net/Kconfig
> @@ -236,6 +236,7 @@ config VETH
>  config VIRTIO_NET
>  	tristate "Virtio network driver"
>  	depends on VIRTIO
> +	select AVERAGE
>  	---help---
>  	  This is the virtual network driver for virtio.  It can be used with
>  	  lguest or QEMU based VMMs (like KVM or Xen).  Say Y or M.

Acked-by: Jason Wang <jasowang@...hat.com>
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