[TCP]: Avoid a divide in tcp_mtu_probing()
tcp_mtu_to_mss() being signed, compiler might emit an integer divide to compute tcp_mtu_to_mss()/2 . Using a right shift is OK here and less expensive. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -125,7 +125,7 @@ static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)
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struct tcp_sock *tp = tcp_sk(sk);
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struct tcp_sock *tp = tcp_sk(sk);
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int mss;
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int mss;
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mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low)/2;
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mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1;
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mss = min(sysctl_tcp_base_mss, mss);
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mss = min(sysctl_tcp_base_mss, mss);
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mss = max(mss, 68 - tp->tcp_header_len);
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mss = max(mss, 68 - tp->tcp_header_len);
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icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
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icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
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