From 825e1c523d5000f067a1614e4a66bb282a2d373c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 15 Oct 2018 09:37:58 -0700 Subject: tcp: cdg: use tcp high resolution clock cache We store in tcp socket a cache of most recent high resolution clock, there is no need to call local_clock() again, since this cache is good enough. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/tcp_cdg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv4/tcp_cdg.c') diff --git a/net/ipv4/tcp_cdg.c b/net/ipv4/tcp_cdg.c index 06fbe102a425..37eebd910396 100644 --- a/net/ipv4/tcp_cdg.c +++ b/net/ipv4/tcp_cdg.c @@ -146,7 +146,7 @@ static void tcp_cdg_hystart_update(struct sock *sk) return; if (hystart_detect & HYSTART_ACK_TRAIN) { - u32 now_us = div_u64(local_clock(), NSEC_PER_USEC); + u32 now_us = tp->tcp_mstamp; if (ca->last_ack == 0 || !tcp_is_cwnd_limited(sk)) { ca->last_ack = now_us; -- cgit v1.2.3