[mcgrof-next:20211123-sysctl-cleanups 21/41] ERROR: modpost: "register_sysctl_mount_point" [fs/binfmt_misc.ko] undefined!

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20211123-sysctl-cleanups
head:   c18add41d859b4feec081eab6cfd624a5642973d
commit: aa450826c557300623f8e3f1ff398b306a7551e9 [21/41] fs: move binfmt_misc sysctl to its own file
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20211125/202111250803.RotVySMo-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/commit/?id=aa450826c557300623f8e3f1ff398b306a7551e9
        git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git
        git fetch --no-tags mcgrof-next 20211123-sysctl-cleanups
        git checkout aa450826c557300623f8e3f1ff398b306a7551e9
        # save the config file to linux build tree
        make W=1 ARCH=um SUBARCH=i386

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

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

>> ERROR: modpost: "register_sysctl_mount_point" [fs/binfmt_misc.ko] undefined!

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