netdev - Re: [PATCH net-next v4 2/3] net-timestamp: Make the clone operation stand-alone from phy timestamping

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Date:	Sun, 7 Sep 2014 23:54:17 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	Alexander Duyck <alexander.h.duyck@...el.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, willemb@...gle.com
Subject: Re: [PATCH net-next v4 2/3] net-timestamp: Make the clone operation
 stand-alone from phy timestamping

On Thu, Sep 04, 2014 at 01:31:35PM -0400, Alexander Duyck wrote:

> +struct sk_buff *skb_clone_sk(struct sk_buff *skb)
> +{
> +	struct sock *sk = skb->sk;
> +	struct sk_buff *clone;
> +
> +	if (!sk || !atomic_inc_not_zero(&sk->sk_refcnt))
> +		return NULL;
> +
> +	clone = skb_clone(skb, GFP_ATOMIC);
> +	if (!clone) {
> +		sock_put(sk);
> +		return NULL;
> +	}
> +
> +	clone->sk = sk;
> +	clone->destructor = sock_efree;
> +
> +	return clone;
> +}
> +EXPORT_SYMBOL(skb_clone_sk);

This function could use a little kerneldoc explaining its purpose and
when to use it.

Thanks,
Richard
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