netdev - Re: [PATCH net-next 05/17] ixgb: remove open-coded skb_cow

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Date:	Sat, 29 Mar 2014 06:00:19 -0700
From:	Joe Perches <joe@...ches.com>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: Re: [PATCH net-next 05/17] ixgb: remove open-coded skb_cow_head.

On Sat, 2014-03-29 at 05:47 -0700, Joe Perches wrote:
> On Sat, 2014-03-29 at 12:26 +0100, Francois Romieu wrote:
> > struct ixgb_adapter *adapter, struct sk_buff *skb)
> >         if (likely(skb_is_gso(skb))) {
> >                 struct ixgb_buffer *buffer_info;
> >                 struct iphdr *iph;
> > +               int err;
> >  
> > -               if (skb_header_cloned(skb)) {
> > -                       err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
> > -                       if (err)
> > -                               return err;
> > -               }
> > +               err = skb_cow_head(skb, 0);
> > +               if (err < 0)
> > +                       return err
> 
> It seems in many instances you're adding
> an unnecessary declaration of err that
> shadows an already declared err

I take back the many.  This seems to be the only one.


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