linux-kernel - Re: [net-next, v2, 3/7] net: dsa: free skb->cb usage in core driver

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Message-ID: <20210426133846.GA22518@hoboy.vegasvil.org>
Date:   Mon, 26 Apr 2021 06:38:46 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Yangbo Lu <yangbo.lu@....com>
Cc:     netdev@...r.kernel.org, Vladimir Oltean <vladimir.oltean@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [net-next, v2, 3/7] net: dsa: free skb->cb usage in core driver

On Mon, Apr 26, 2021 at 05:37:58PM +0800, Yangbo Lu wrote:
> @@ -624,7 +623,7 @@ static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
>  
>  	dev_sw_netstats_tx_add(dev, 1, skb->len);
>  
> -	DSA_SKB_CB(skb)->clone = NULL;
> +	memset(skb->cb, 0, 48);

Replace hard coded 48 with sizeof() please.

Thanks,
Richard