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net/packet: annotate accesses to po->xmit
[ Upstream commit b9d83ab ] po->xmit can be set from setsockopt(PACKET_QDISC_BYPASS), while read locklessly. Use READ_ONCE()/WRITE_ONCE() to avoid potential load/store tearing issues. Fixes: d346a3f ("packet: introduce PACKET_QDISC_BYPASS socket option") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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