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| author | Eric Dumazet <dada1@cosmosbay.com> | 2007-12-21 05:58:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:00:00 -0800 |
| commit | 8beb5c5f12c8484c59edf9b691f2c4bb4d31f3a0 (patch) | |
| tree | 43e9ee3ccbff75813c9cbc0fee1635ff86692363 | |
| parent | 829942c18704250fce4d5eca787065a3ee7c685d (diff) | |
| download | kernel-crypto-8beb5c5f12c8484c59edf9b691f2c4bb4d31f3a0.tar.gz kernel-crypto-8beb5c5f12c8484c59edf9b691f2c4bb4d31f3a0.tar.xz kernel-crypto-8beb5c5f12c8484c59edf9b691f2c4bb4d31f3a0.zip | |
[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>
| -rw-r--r-- | net/ipv4/tcp_timer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index ea111e91f0e..ea85bc00c61 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -125,7 +125,7 @@ static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk) struct tcp_sock *tp = tcp_sk(sk); int mss; - mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low)/2; + mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1; mss = min(sysctl_tcp_base_mss, mss); mss = max(mss, 68 - tp->tcp_header_len); icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss); |