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>
{
u64 val = tcp_clock_ns();
- if (val > tp->tcp_clock_cache)
- tp->tcp_clock_cache = val;
-
- val = div_u64(val, NSEC_PER_USEC);
- if (val > tp->tcp_mstamp)
- tp->tcp_mstamp = val;
+ tp->tcp_clock_cache = val;
+ tp->tcp_mstamp = div_u64(val, NSEC_PER_USEC);
}
static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,