Hi Muchun,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tj-cgroup/for-next]
[also build test ERROR on linus/master v5.15-rc1]
[cannot apply to hnaz-mm/master next-20210917]
[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]

url:    https://github.com/0day-ci/linux/commits/Muchun-Song/Use-obj_cgroup-APIs-to-charge-the-LRU-pages/20210916-215452
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-next
config: x86_64-randconfig-r034-20210916 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c8b3d7d6d6de37af68b2f379d0e37304f78e115f)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/38a59259cef424526ba9abba4aa87ae066948218
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Muchun-Song/Use-obj_cgroup-APIs-to-charge-the-LRU-pages/20210916-215452
        git checkout 38a59259cef424526ba9abba4aa87ae066948218
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

mm/huge_memory.c:516:1: error: expected external declaration

   +static inline struct mem_cgroup *split_queue_memcg(struct deferred_split *queue)
   ^
   1 error generated.


vim +516 mm/huge_memory.c

   508	
   509	static inline struct deferred_split *page_memcg_split_queue(struct page *head)
   510	{
   511		struct mem_cgroup *memcg = page_memcg(head);
   512	
   513		return memcg ? &memcg->deferred_split_queue : NULL;
   514	}
   515	#else
 > 516	+static inline struct mem_cgroup *split_queue_memcg(struct deferred_split *queue)
   517	{
   518		return NULL;
   519	}
   520	

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