[linux-next:master 12061/12283] mm/khugepaged.c:435:undefined reference to `shmem_hpage_pmd_enabled'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   4f3e012d4cfd1d9bf837870c961f462ca9f23ebe
commit: 8b07e88e36961c4785dd13dbdbb5d7977b458940 [12061/12283] mm: shmem: fix khugepaged activation policy for shmem
config: loongarch-randconfig-s042-20221209 (https://download.01.org/0day-ci/archive/20240917/202409171905.9gqKNeeL-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240917/202409171905.9gqKNeeL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409171905.9gqKNeeL-lkp@intel.com/

All errors (new ones prefixed by >>):

   loongarch64-linux-ld: mm/khugepaged.o: in function `hugepage_pmd_enabled':
>> mm/khugepaged.c:435:(.text+0x2338): undefined reference to `shmem_hpage_pmd_enabled'


vim +435 mm/khugepaged.c

   415	
   416	static bool hugepage_pmd_enabled(void)
   417	{
   418		/*
   419		 * We cover the anon, shmem and the file-backed case here; file-backed
   420		 * hugepages, when configured in, are determined by the global control.
   421		 * Anon pmd-sized hugepages are determined by the pmd-size control.
   422		 * Shmem pmd-sized hugepages are also determined by its pmd-size control,
   423		 * except when the global shmem_huge is set to SHMEM_HUGE_DENY.
   424		 */
   425		if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) &&
   426		    hugepage_global_enabled())
   427			return true;
   428		if (test_bit(PMD_ORDER, &huge_anon_orders_always))
   429			return true;
   430		if (test_bit(PMD_ORDER, &huge_anon_orders_madvise))
   431			return true;
   432		if (test_bit(PMD_ORDER, &huge_anon_orders_inherit) &&
   433		    hugepage_global_enabled())
   434			return true;
 > 435		if (shmem_hpage_pmd_enabled())
   436			return true;
   437		return false;
   438	}
   439	

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