Commit b32d1310 authored Jul 21, 2008 by David S. Miller

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 <davem@davemloft.net>

parent ebb36a97

net/ipv4/tcp_output.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}