[yhuang:random-r0.1i 30/42] ld: node.c:undefined reference to `node_random_migrate_pages'

[yhuang:random-r0.1i 30/42] ld: node.c:undefined reference to `node_random_migrate_pages'

[kbuild test robot]

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tree:   yhuang/random-r0.1i
head:   96efac420c3a75d62cf4ff43184d4dbd0ce94b55
commit: 321be1f29c4be3e5407b5463bcb053990c65cfda [30/42] mm: Identify cold pages via randomly sampling + idle page tracking
config: x86_64-defconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
reproduce:
        git checkout 321be1f29c4be3e5407b5463bcb053990c65cfda
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   ld: mm/page_alloc.o: in function `free_area_init_node':
   page_alloc.c:(.init.text+0x98a): undefined reference to `node_random_promote_select_work'
   ld: page_alloc.c:(.init.text+0x9ce): undefined reference to `node_random_promote_check_work'
   ld: page_alloc.c:(.init.text+0xa12): undefined reference to `node_random_demote_select_work'
   ld: page_alloc.c:(.init.text+0xa5b): undefined reference to `node_random_demote_check_work'
   ld: drivers/base/node.o: in function `random_migrate_period_ms_store':
   node.c:(.text+0x21d): undefined reference to `node_random_migrate_stop'
   ld: node.c:(.text+0x22a): undefined reference to `node_random_migrate_start'
   ld: drivers/base/node.o: in function `random_migrate_mb_store':
   node.c:(.text+0x35f): undefined reference to `node_random_migrate_stop'
>> ld: node.c:(.text+0x37b): undefined reference to `node_random_migrate_pages'
   ld: node.c:(.text+0x39d): undefined reference to `node_random_migrate_start'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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