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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>
This commit is contained in:
Eric Dumazet 2018-11-27 14:42:00 -08:00 committed by David S. Miller
parent b0e3f1bdf9
commit ebeef4bccc
1 changed files with 1 additions and 1 deletions
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2
include/net/tcp.h
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@ -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)