[sashal-linux-stable:queue-5.10 56/74] mm/page_alloc.c:3275:2: error: implicit declaration of function 'split_page_memcg'

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.10
head:   9ced6633127bd25a94939777d9ecda54800859fc
commit: ce4ba942d630e0361a9272fc065ee6530bc1bdd7 [56/74] mm/memcg: set memcg when splitting page
config: powerpc-randconfig-r002-20210318 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6db3ab2903f42712f44000afb5aa467efbd25f35)
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
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/commit/?id=ce4ba942d630e0361a9272fc065ee6530bc1bdd7
        git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git
        git fetch --no-tags sashal-linux-stable queue-5.10
        git checkout ce4ba942d630e0361a9272fc065ee6530bc1bdd7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 

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

All errors (new ones prefixed by >>):

>> mm/page_alloc.c:3275:2: error: implicit declaration of function 'split_page_memcg' [-Werror,-Wimplicit-function-declaration]
           split_page_memcg(page, 1 << order);
           ^
   mm/page_alloc.c:3563:15: warning: no previous prototype for function 'should_fail_alloc_page' [-Wmissing-prototypes]
   noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
                 ^
   mm/page_alloc.c:3563:10: note: declare 'static' if the function is not intended to be used outside of this translation unit
   noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
            ^
            static 
   mm/page_alloc.c:6244:23: warning: no previous prototype for function 'memmap_init' [-Wmissing-prototypes]
   void __meminit __weak memmap_init(unsigned long size, int nid,
                         ^
   mm/page_alloc.c:6244:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __meminit __weak memmap_init(unsigned long size, int nid,
   ^
   static 
   2 warnings and 1 error generated.


vim +/split_page_memcg +3275 mm/page_alloc.c

  3256	
  3257	/*
  3258	 * split_page takes a non-compound higher-order page, and splits it into
  3259	 * n (1<<order) sub-pages: page[0..n]
  3260	 * Each sub-page must be freed individually.
  3261	 *
  3262	 * Note: this is probably too low level an operation for use in drivers.
  3263	 * Please consult with lkml before using this in your driver.
  3264	 */
  3265	void split_page(struct page *page, unsigned int order)
  3266	{
  3267		int i;
  3268	
  3269		VM_BUG_ON_PAGE(PageCompound(page), page);
  3270		VM_BUG_ON_PAGE(!page_count(page), page);
  3271	
  3272		for (i = 1; i < (1 << order); i++)
  3273			set_page_refcounted(page + i);
  3274		split_page_owner(page, 1 << order);
> 3275		split_page_memcg(page, 1 << order);
  3276	}
  3277	EXPORT_SYMBOL_GPL(split_page);
  3278	

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

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