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authorEric Dumazet <edumazet@google.com>2018-11-27 14:42:00 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-30 13:26:53 -0800
commitebeef4bcccf4681ba3de04fbf3a005f6054f7999 (patch)
treeeeda8c5023844b0c4dc1f5bb30fd7d7d94a47448 /include/net/tcp.h
parentb0e3f1bdf9e7140fd1151af575f468b5827a61e1 (diff)
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 <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h2
1 files changed, 1 insertions, 1 deletions
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)