udp: lockless UDP_ENCAP_L2TPINUDP / UDP_GRO
[ Upstream commit ac9a7f4c ] Move udp->encap_enabled to udp->udp_flags. Add udp_test_and_set_bit() helper to allow lockless udp_tunnel_encap_enable() implementation. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Stable-dep-of: 70a36f57 ("udp: annotate data-races around udp->encap_type") Signed-off-by: Sasha Levin <sashal@kernel.org>
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