Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8beb5c5f12c8484c59edf9b691f2c4bb4d31f3a0
Commit: 8beb5c5f12c8484c59edf9b691f2c4bb4d31f3a0
Parent: 829942c18704250fce4d5eca787065a3ee7c685d
Author: Eric Dumazet <[EMAIL PROTECTED]>
AuthorDate: Fri Dec 21 05:58:29 2007 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 15:00:00 2008 -0800
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
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 ea111e9..ea85bc0 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);
-
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