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[ Upstream commitf0e0d04413] Update 'confirmed' timestamp when ARP packet is received. It shouldn't affect locktime logic and anyway entry can be confirmed by any higher-layer protocol. Thus it makes sense to confirm it when ARP packet is received. Fixes:77d7123342("neighbour: update neigh timestamps iff update is effective") Signed-off-by: Vasily Khoruzhick <vasilykh@arista.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>