netdev - Re: build breakage due to br_multicast.c referencing ipv6_dev_get

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Date:	Wed, 16 Mar 2011 13:34:12 -0400
From:	Brian Haley <brian.haley@...com>
To:	Jan Beulich <JBeulich@...ell.com>
CC:	linus.luessing@....de, davem@...emloft.net,
	shemminger@...ux-foundation.org, bridge@...ts.linux-foundation.org,
	netdev@...r.kernel.org
Subject: Re: build breakage due to br_multicast.c referencing	 ipv6_dev_get_saddr()

On 03/16/2011 08:34 AM, Jan Beulich wrote:
> With BRIDGE=y and IPV6=m commit
> fe29ec41aaa51902aebd63658dfb04fe6fea8be5 ("bridge: Use IPv6
> link-local address for multicast listener queries") causes the build to
> break.
> 
> Similary, even if both are =m, but ipv6.ko got blacklisted (as is
> happening in various SuSE distros when disabling IPv6), there's
> a runtime problem since bridge.ko then won't load anymore due
> to the missing symbol.

Load the ipv6 module with disable=1, which is why I added it :)

>From Documentation/networking/ipv6.txt:

disable

        Specifies whether to load the IPv6 module, but disable all
        its functionality.  This might be used when another module
        has a dependency on the IPv6 module being loaded, but no
        IPv6 addresses or operations are desired.

        The possible values and their effects are:

        0
                IPv6 is enabled.

                This is the default value.

        1
                IPv6 is disabled.

                No IPv6 addresses will be added to interfaces, and
                it will not be possible to open an IPv6 socket.

                A reboot is required to enable IPv6.

-Brian
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