Hi Florian,

I love your patch! Yet something to improve:

[auto build test ERROR on nf-next/master]

url:    https://github.com/0day-ci/linux/commits/Florian-Westphal/netfilter-conntrack-shrink-size-of-netns_ct/20210409-213201
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git master
config: riscv-randconfig-r026-20210412 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/00f7dd72d201a63b35e50b958dc99c7745e7b90f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Florian-Westphal/netfilter-conntrack-shrink-size-of-netns_ct/20210409-213201
        git checkout 00f7dd72d201a63b35e50b958dc99c7745e7b90f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "nf_conntrack_count" [net/netfilter/nf_conntrack_netlink.ko] undefined!

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0-DAY CI Kernel Test Service, Intel Corporation
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