netdev - Re: [RFC PATCH] NET: Clone the sk

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Message-Id: <20080103.152517.242377970.davem@davemloft.net>
Date:	Thu, 03 Jan 2008 15:25:17 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	paul.moore@...com
Cc:	jarkao2@...il.com, hadi@...erus.ca, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] NET: Clone the sk_buff->iif field properly

From: Paul Moore <paul.moore@...com>
Date: Thu, 3 Jan 2008 18:13:57 -0500

> On Thursday 03 January 2008 6:05:18 pm David Miller wrote:
> > From: Paul Moore <paul.moore@...com>
> > Date: Thu, 3 Jan 2008 16:20:06 -0500
> >
> > > On Thursday 03 January 2008 4:13:12 pm Jarek Poplawski wrote:
> > > > On Thu, Jan 03, 2008 at 11:15:34AM -0500, Paul Moore wrote:
> > > > ...
> > > >
> > > > > While I'm at it, is there some reason for this #define in
> > > > > __skb_clone()?
> > > > >
> > > > >  #define C(x) n->x = skb->x
> > > > >
> > > > > ... it seems kinda silly to me and I tend to think the code
> > > > > would be better without it.
> > > >
> > > > IMHO, if there are a lot of this, it's definitely more readable:
> > > > easier to check which values are simply copied and which need
> > > > something more. But, as usual, it's probably a question of taste,
> > > > and of course without it it would definitely look classier...
> > >
> > > For me personally, I would argue the readability bit.
> >
> > I definitely think the C() thing is more readable.
> >
> > Less typing, less reading...
> 
> Well, you're the boss :)  I just put the C() macro back in, but I kept 
> the reordering that was suggested to help reduce cacheline bounces 
> since that still makes sense to me.  The function now looks like this:

Looks ok to me.
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