tcp: remove conditional branches from tcp_mstamp_refresh()
tcp_clock_ns() (aka ktime_get_ns()) is using monotonic clock, so the checks we had in tcp_mstamp_refresh() are no longer relevant. This patch removes cpu stall (when the cache line is not hot) Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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