netdev - Re: [PATCH vhost] virtio_net: fix build warnings

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Date:   Mon, 7 Mar 2022 05:00:20 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Cc:     virtualization@...ts.linux-foundation.org,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH vhost] virtio_net: fix build warnings

On Mon, Mar 07, 2022 at 05:40:42PM +0800, Xuan Zhuo wrote:
> These warnings appear on some platforms (arm multi_v7_defconfig). This
> patch fixes these warnings.
> 
> drivers/net/virtio_net.c: In function 'virtnet_rx_vq_reset':
> drivers/net/virtio_net.c:1823:63: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=]
>  1823 |                    "reset rx reset vq fail: rx queue index: %ld err: %d\n",
>       |                                                             ~~^
>       |                                                               |
>       |                                                               long int
>       |                                                             %d
>  1824 |                    rq - vi->rq, err);
>       |                    ~~~~~~~~~~~
>       |                       |
>       |                       int
> drivers/net/virtio_net.c: In function 'virtnet_tx_vq_reset':
> drivers/net/virtio_net.c:1873:63: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=]
>  1873 |                    "reset tx reset vq fail: tx queue index: %ld err: %d\n",
>       |                                                             ~~^
>       |                                                               |
>       |                                                               long int
>       |                                                             %d
>  1874 |                    sq - vi->sq, err);
>       |                    ~~~~~~~~~~~
>       |                       |
>       |                       int
> 
> Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>

I squashed this into the problematic patch. Take a look
at my tree to verify all's well pls.

> ---
>  drivers/net/virtio_net.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 1fa2d632a994..4d629d1ea894 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -1820,7 +1820,7 @@ static int virtnet_rx_vq_reset(struct virtnet_info *vi,
>  
>  err:
>  	netdev_err(vi->dev,
> -		   "reset rx reset vq fail: rx queue index: %ld err: %d\n",
> +		   "reset rx reset vq fail: rx queue index: %td err: %d\n",
>  		   rq - vi->rq, err);
>  	virtnet_napi_enable(rq->vq, &rq->napi);
>  	return err;
> @@ -1870,7 +1870,7 @@ static int virtnet_tx_vq_reset(struct virtnet_info *vi,
>  
>  err:
>  	netdev_err(vi->dev,
> -		   "reset tx reset vq fail: tx queue index: %ld err: %d\n",
> +		   "reset tx reset vq fail: tx queue index: %td err: %d\n",
>  		   sq - vi->sq, err);
>  	virtnet_napi_tx_enable(vi, sq->vq, &sq->napi);
>  	return err;
> -- 
> 2.31.0