[rgushchin:new_slab.3 9/21] slub.c:undefined reference to `objs_per_slab'

[rgushchin:new_slab.3 9/21] slub.c:undefined reference to `objs_per_slab'

[kbuild test robot]

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tree:   https://github.com/rgushchin/linux.git new_slab.3
head:   1b7d558f2da038a577c5d1ce3faded899c149e04
commit: 9ab4c16c959af6e2b79b78afd35a839812aa4c0d [9/21] mm: memcg/slab: allocate obj_cgroups for non-root slab pages
config: mips-64r6el_defconfig (attached as .config)
compiler: mips64el-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
        git checkout 9ab4c16c959af6e2b79b78afd35a839812aa4c0d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=mips 

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 >>):

   mips64el-linux-ld: mm/slub.o: in function `.L458':
>> slub.c:(.text+0x1f70): undefined reference to `objs_per_slab'

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

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