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Date:	Sun, 30 Sep 2007 07:36:53 +0800
From:	Herbert Xu <>
To:	Patrick McHardy <>
Subject: Re: [PKT_SCHED]: Add stateless NAT

On Sat, Sep 29, 2007 at 05:21:23PM +0200, Patrick McHardy wrote:
> Unfortunately gcc doesn't perform tail call optimization when the
> address of a parameter or local variable is passed to an extern
> function before the tail call, which NF_HOOK does for the skb.

You mean the struct sk_buff **pskb bit? I've always wondered
why netfilter had to modify the skb.  Could we perhaps make it
so that it doesn't need to do so?

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