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This patch introduces some code that is compiled in whenever
CONFIG_BRIDGE_NETFILTER is built, with the code called from code compiled under
CONFIG_BRIDGE, CONFIG_BRIDGE_IGMP_SNOOPING or CONFIG_BRIDGE_NF_EBTABLES.
Unfortunately, these options aren't setting explicitly the dependency they now
have on CONFIG_BRIDGE_NETFILTER, for obvious reasons for CONFIG_BRIDGE.
However, this is not working really well when CONFIG_BRIDGE_NETFILTER is built
as a module, since code statically compiled will now use a function that is not
in the kernel image, which makes the linker grumpy.
Solve this by removing the option to build CONFIG_BRIDGE_NETFILTER as a module,
and protect our function definition by an IS_BUILTIN instead of a IS_ENABLED
macro. This fixes the issue for CONFIG_BRIDGE and CONFIG_BRIDGE_IGMP_SNOOPING.
Fixing CONFIG_BRIDGE_NF_EBTABLES has to be handled a bit differently, since it
directly references a variable that will not be declared if
CONFIG_BRIDGE_NETFILTER is not set. Protect the variable affectations by an
ifdef to make sure this doesn't happen.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 43419
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