From b32d13102d39ed411d152a7ffcc5f66d5b3b1b49 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 21 Jul 2008 18:45:34 -0700 Subject: [PATCH] tcp: Fix bitmask test in tcp_syn_options() As reported by Alexey Dobriyan: CHECK net/ipv4/tcp_output.c net/ipv4/tcp_output.c:475:7: warning: dubious: !x & y And sparse is damn right! if (unlikely(!OPTION_TS & opts->options)) ^^^ size += TCPOLEN_SACKPERM_ALIGNED; OPTION_TS is (1 << 1), so condition will never trigger. Signed-off-by: David S. Miller --- net/ipv4/tcp_output.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 1fa683c0ba9b..a00532de2a8c 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -472,7 +472,7 @@ static unsigned tcp_syn_options(struct sock *sk, struct sk_buff *skb, } if (likely(sysctl_tcp_sack)) { opts->options |= OPTION_SACK_ADVERTISE; - if (unlikely(!OPTION_TS & opts->options)) + if (unlikely(!(OPTION_TS & opts->options))) size += TCPOLEN_SACKPERM_ALIGNED; } -- 2.34.1