Hi Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on v5.6 next-20200408]
[cannot apply to driver-core/driver-core-testing block/for-next linus/master]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Christian-Brauner/loopfs/20200409-030206
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f5ae2ea6347a308cfe91f53b53682ce635497d0d
config: m68k-m5475evb_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=9.3.0 make.cross ARCH=m68k 

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

All errors (new ones prefixed by >>):

   m68k-linux-ld: fs/kernfs/dir.o: in function `kernfs_dop_revalidate':
>> dir.c:(.text+0x40a): undefined reference to `init_net'
   m68k-linux-ld: fs/kernfs/dir.o: in function `kernfs_dir_pos':
   dir.c:(.text+0x7b4): undefined reference to `init_net'
>> m68k-linux-ld: dir.c:(.text+0x8fe): undefined reference to `init_net'
   m68k-linux-ld: fs/kernfs/dir.o: in function `kernfs_fop_readdir':
   dir.c:(.text+0xb82): undefined reference to `init_net'
   m68k-linux-ld: fs/kernfs/dir.o: in function `kernfs_iop_lookup':
   dir.c:(.text+0x12e8): undefined reference to `init_net'

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