From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: ipv6: Add support for RTA_PREFSRC
Date: Fri, 01 Apr 2011 20:46:13 -0700 (PDT)
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You can't change the layout of "struct in6_rtmsg", as that structure
is explicitly exported to user space and changing it will break every
application out there.