[Bridge] build breakage due to br_multicast.c referencing ipv6_dev_get_saddr()

[David Miller]

From: "Jan Beulich" <JBeulich at novell.com>
Date: Wed, 16 Mar 2011 12:34:19 +0000

> With BRIDGE=y and IPV6=m commit
> fe29ec41aaa51902aebd63658dfb04fe6fea8be5 ("bridge: Use IPv6
> link-local address for multicast listener queries") causes the build to
> break.

Fixed by:

commit dcbcdf22f500ac6e4ec06485341024739b9dc241
Author: Randy Dunlap <randy.dunlap at oracle.com>
Date:   Thu Mar 10 13:45:57 2011 -0800

    net: bridge builtin vs. ipv6 modular
    
    When configs BRIDGE=y and IPV6=m, this build error occurs:
    
    br_multicast.c:(.text+0xa3341): undefined reference to `ipv6_dev_get_saddr'
    
    BRIDGE_IGMP_SNOOPING is boolean; if it were tristate, then adding
    	depends on IPV6 || IPV6=n
    to BRIDGE_IGMP_SNOOPING would be a good fix.  As it is currently,
    making BRIDGE depend on the IPV6 config works.
    
    Reported-by: Patrick Schaaf <netdev at bof.de>
    Signed-off-by: Randy Dunlap <randy.dunlap at oracle.com>
    Signed-off-by: David S. Miller <davem at davemloft.net>

diff --git a/net/bridge/Kconfig b/net/bridge/Kconfig
index 9190ae4..6dee7bf 100644
--- a/net/bridge/Kconfig
+++ b/net/bridge/Kconfig
@@ -6,6 +6,7 @@ config BRIDGE
 	tristate "802.1d Ethernet Bridging"
 	select LLC
 	select STP
+	depends on IPV6 || IPV6=n
 	---help---
 	  If you say Y here, then your Linux box will be able to act as an
 	  Ethernet bridge, which means that the different Ethernet segments it