Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on next-20221013]
[cannot apply to shuah-kselftest/next v6.0]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/alexlzhu-fb-com/THP-Shrinker/20221013-065303
config: x86_64-randconfig-a011
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/7b8b0daade87dcdb8158c1fcc16fcc7963a8869c
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review alexlzhu-fb-com/THP-Shrinker/20221013-065303
        git checkout 7b8b0daade87dcdb8158c1fcc16fcc7963a8869c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   ld: mm/huge_memory.o: in function `add_underutilized_thp':
>> mm/huge_memory.c:3033: undefined reference to `memcg_list_lru_alloc'


vim +3033 mm/huge_memory.c

  3010	
  3011	void add_underutilized_thp(struct page *page)
  3012	{
  3013		VM_BUG_ON_PAGE(!PageTransHuge(page), page);
  3014	
  3015		if (PageSwapCache(page))
  3016			return;
  3017	
  3018		/*
  3019		 * Need to take a reference on the page to prevent the page from getting free'd from
  3020		 * under us while we are adding the THP to the shrinker.
  3021		 */
  3022		if (!get_page_unless_zero(page))
  3023			return;
  3024	
  3025		if (!is_anon_transparent_hugepage(page))
  3026			goto out_put;
  3027	
  3028		if (is_huge_zero_page(page))
  3029			goto out_put;
  3030	
  3031		lock_page(page);
  3032	
> 3033		if (memcg_list_lru_alloc(page_memcg(page), &huge_low_util_page_lru, GFP_KERNEL))
  3034			goto out_unlock;
  3035	
  3036		list_lru_add_page(&huge_low_util_page_lru, page, page_underutilized_thp_list(page));
  3037	
  3038	out_unlock:
  3039		unlock_page(page);
  3040	out_put:
  3041		put_page(page);
  3042	}
  3043	

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