linux-kernel - Re: [PATCH] Simplify some code to use the container

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Message-Id: <20070103165034.13935d8a.akpm@osdl.org>
Date:	Wed, 3 Jan 2007 16:50:34 -0800
From:	Andrew Morton <akpm@...l.org>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
Cc:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Simplify some code to use the container_of() macro.

On Sun, 31 Dec 2006 15:55:22 -0500 (EST)
"Robert P. J. Day" <rpjday@...dspring.com> wrote:

> --- a/net/ipv4/netfilter/nf_nat_core.c
> +++ b/net/ipv4/netfilter/nf_nat_core.c
> @@ -168,7 +168,7 @@ find_appropriate_src(const struct nf_conntrack_tuple *tuple,
> 
>  	read_lock_bh(&nf_nat_lock);
>  	list_for_each_entry(nat, &bysource[h], info.bysource) {
> -		ct = (struct nf_conn *)((char *)nat - offsetof(struct nf_conn, data));
> +		ct = container_of(nat, struct nf_conn, data);

This one isn't right.  Please always carefully compile-test these things.
-
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