Revert "ipv6: Don't depend on per socket memory for neighbour discovery messages"
This reverts commit 1f324e38. It seems to cause regressions, and in particular the output path really depends upon there being a socket attached to skb->sk for checks such as sk_mc_loop(skb->sk) for example. See ip6_output_finish2(). Reported-by: Stephen Warren <swarren@wwwdotorg.org> Reported-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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