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Eric Dumazet authored
This fixes data-races around np->mcast_hops, and make IPV6_MULTICAST_HOPS lockless. Note that np->mcast_hops is never negative, thus can fit an u8 field instead of s16. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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