netdev - Re: [PATCH net-next v2 1/3] virtio-net: reprobe csum related fields for skb passed by XDP

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Date: Sat, 24 Jun 2023 21:28:42 +0200
From: Simon Horman <simon.horman@...igine.com>
To: Heng Qi <hengqi@...ux.alibaba.com>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org,
	"Michael S . Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>
Subject: Re: [PATCH net-next v2 1/3] virtio-net: reprobe csum related fields
 for skb passed by XDP

On Sat, Jun 24, 2023 at 08:26:02PM +0800, Heng Qi wrote:

...

> +static int virtnet_set_csum_after_xdp(struct virtnet_info *vi,
> +				      struct sk_buff *skb,
> +				      __u8 flags)

Hi Heng Qi,

Unfortunately this appears to break an x86_64 allmodconfig build
with GCC 12.3.0:

drivers/net/virtio_net.c:1671:12: error: 'virtnet_set_csum_after_xdp' defined but not used [-Werror=unused-function]
 1671 | static int virtnet_set_csum_after_xdp(struct virtnet_info *vi,
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~

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