[alexshi:lruiso 20/20] ld: swap.c:undefined reference to `page_is_charge'

[alexshi:lruiso 20/20] ld: swap.c:undefined reference to `page_is_charge'

[kbuild test robot]

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tree:   https://github.com/alexshi/linux.git lruiso
head:   26578f78e29aedf4f671826bebd9e8a1884ee059
commit: 26578f78e29aedf4f671826bebd9e8a1884ee059 [20/20] debug
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        git checkout 26578f78e29aedf4f671826bebd9e8a1884ee059
        # save the attached .config to linux build tree
        make ARCH=i386 

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 >>):

   ld: mm/swap.o: in function `pagevec_lru_move_fn':
   swap.c:(.text+0xb68): undefined reference to `set_page_iso'
>> ld: swap.c:(.text+0xb6f): undefined reference to `page_is_charge'
   ld: mm/vmscan.o: in function `check_move_unevictable_pages':
   vmscan.c:(.text+0x256f): undefined reference to `set_page_iso'

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

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