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Tunnels can force an alignment of their percpu data to reduce number of cache lines used in fast path, or read in .ndo_get_stats() percpu_alloc() is a very fine grained allocator, so any small hole will be used anyway. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>