[netfilter-nf-next:testing 12/15] flow_dissector.c:undefined reference to `__nf_ct_ext_find'

[kernel test robot]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next.git testing
head:   608a724032f9807149638d5f7bde065500e8c4ba
commit: 9c1bc3d863d9e8437347149391ad3918eb95ed36 [12/15] netfilter: extensions: introduce extension genid count
config: m68k-defconfig (https://download.01.org/0day-ci/archive/20220304/202203041002.W3fh0bhL-lkp@xxxxxxxxx/config)
compiler: m68k-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next.git/commit/?id=9c1bc3d863d9e8437347149391ad3918eb95ed36
        git remote add netfilter-nf-next git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next.git
        git fetch --no-tags netfilter-nf-next testing
        git checkout 9c1bc3d863d9e8437347149391ad3918eb95ed36
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   m68k-linux-ld: net/core/flow_dissector.o: in function `skb_flow_dissect_ct':
>> flow_dissector.c:(.text+0x67c): undefined reference to `__nf_ct_ext_find'

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx