From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH v2] ipconfig: add nameserver IPs to kernel-parameter ip=
Date: Fri, 21 Sep 2012 13:37:59 -0400 (EDT)
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From: Christoph Fritz <chf.fritz@googlemail.com>
Date: Thu, 20 Sep 2012 23:48:50 +0200

> diff --git a/Documentation/filesystems/nfs/nfsroot.txt b/Documentation/filesystems/nfs/nfsroot.txt
> index ffdd9d8..4ed7875 100644
> --- a/Documentation/filesystems/nfs/nfsroot.txt
> +++ b/Documentation/filesystems/nfs/nfsroot.txt
> @@ -158,6 +158,13 @@ ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>
>  
>                  Default: any
>  
> +  <dns0-ip>	IP address of first nameserver.
> +		Value gets exported by /proc/net/pnp which is often linked
> +		on embedded systems by /etc/resolv.conf.
> +
> +  <dns1-ip>	IP address of secound nameserver.
> +		Same as above.
> +
>  
>  nfsrootdebug
>  

This documentation update is not sufficient.

You have to properly show, in the lines above where you made your change,
where the new settings are placed in the "ip=" option.