From ebeef4bcccf4681ba3de04fbf3a005f6054f7999 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 27 Nov 2018 14:42:00 -0800 Subject: tcp: hint compiler about sack flows Tell the compiler that most TCP flows are using SACK these days. There is no need to add the unlikely() clause in tcp_is_reno(), the compiler is able to infer it. Signed-off-by: Eric Dumazet Acked-by: Neal Cardwell Acked-by: Yuchung Cheng Signed-off-by: David S. Miller --- include/net/tcp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/net/tcp.h') diff --git a/include/net/tcp.h b/include/net/tcp.h index 63e37dd1c274..0c61bf0a06da 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1124,7 +1124,7 @@ void tcp_rate_check_app_limited(struct sock *sk); */ static inline int tcp_is_sack(const struct tcp_sock *tp) { - return tp->rx_opt.sack_ok; + return likely(tp->rx_opt.sack_ok); } static inline bool tcp_is_reno(const struct tcp_sock *tp) -- cgit v1.2.3-59-g8ed1b