linux-kernel - Re: [PATCH v7 36/46] vhost/net: suppress compiler warning

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Date:	Mon, 1 Dec 2014 13:37:40 +0100
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	linux-kernel@...r.kernel.org, David Miller <davem@...emloft.net>,
	rusty@....ibm.com, nab@...ux-iscsi.org, pbonzini@...hat.com,
	thuth@...ux.vnet.ibm.com, dahi@...ux.vnet.ibm.com,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH v7 36/46] vhost/net: suppress compiler warning

On Sun, 30 Nov 2014 17:12:13 +0200
"Michael S. Tsirkin" <mst@...hat.com> wrote:

> len is always initialized since function is called with size > 0.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  drivers/vhost/net.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index 984242e..54ffbb0 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -501,7 +501,7 @@ static int get_rx_bufs(struct vhost_virtqueue *vq,
>  	int headcount = 0;
>  	unsigned d;
>  	int r, nlogs = 0;
> -	u32 len;
> +	u32 uninitialized_var(len);
> 
>  	while (datalen > 0 && headcount < quota) {
>  		if (unlikely(seg >= UIO_MAXIOV)) {

Want to merge this with the patch introducing the variable and add a
comment there?

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