[PATCH] debugfs: allow access relay files in lockdown mode

[kernel test robot]

Hi Junxiao,

kernel test robot noticed the following build errors:

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus linus/master v6.3-rc6 next-20230412]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Junxiao-Bi/debugfs-allow-access-relay-files-in-lockdown-mode/20230412-081241
patch link:    https://lore.kernel.org/r/20230412001030.88441-1-junxiao.bi%40oracle.com
patch subject: [PATCH] debugfs: allow access relay files in lockdown mode
config: powerpc-buildonly-randconfig-r003-20230410 (https://download.01.org/0day-ci/archive/20230412/202304121808.IDucPQw7-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/7891278613631bb6076e7b4603c1e907d1304cfa
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Junxiao-Bi/debugfs-allow-access-relay-files-in-lockdown-mode/20230412-081241
        git checkout 7891278613631bb6076e7b4603c1e907d1304cfa
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304121808.IDucPQw7-lkp@intel.com/

All errors (new ones prefixed by >>):

   powerpc-linux-ld: fs/debugfs/file.o: in function `debugfs_locked_down':
   fs/debugfs/file.c:163: undefined reference to `relay_file_operations'
>> powerpc-linux-ld: fs/debugfs/file.c:163: undefined reference to `relay_file_operations'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests