[akpm-mm:mm-unstable 27/106] mm/page_io.c:220:17: error: implicit declaration of function 'count_objcg_events'; did you mean 'count_objcg_event'?

[akpm-mm:mm-unstable 27/106] mm/page_io.c:220:17: error: implicit declaration of function 'count_objcg_events'; did you mean 'count_objcg_event'?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   7994b7ea6ac880efd0c38fedfbffd5ab8b1b7b2b
commit: c10966f19a878a66206327ebe3b85500f59f47e2 [27/106] mm: count zeromap read and set for swapout and swapin
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20241106/202411062114.V0749sXc-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241106/202411062114.V0749sXc-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/202411062114.V0749sXc-lkp@intel.com/

Note: the akpm-mm/mm-unstable HEAD 7994b7ea6ac880efd0c38fedfbffd5ab8b1b7b2b builds fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

   mm/page_io.c: In function 'swap_zeromap_folio_set':
>> mm/page_io.c:220:17: error: implicit declaration of function 'count_objcg_events'; did you mean 'count_objcg_event'? [-Werror=implicit-function-declaration]
     220 |                 count_objcg_events(objcg, SWPOUT_ZERO, nr_pages);
         |                 ^~~~~~~~~~~~~~~~~~
         |                 count_objcg_event
   cc1: some warnings being treated as errors


vim +220 mm/page_io.c

   204	
   205	static void swap_zeromap_folio_set(struct folio *folio)
   206	{
   207		struct obj_cgroup *objcg = get_obj_cgroup_from_folio(folio);
   208		struct swap_info_struct *sis = swp_swap_info(folio->swap);
   209		int nr_pages = folio_nr_pages(folio);
   210		swp_entry_t entry;
   211		unsigned int i;
   212	
   213		for (i = 0; i < folio_nr_pages(folio); i++) {
   214			entry = page_swap_entry(folio_page(folio, i));
   215			set_bit(swp_offset(entry), sis->zeromap);
   216		}
   217	
   218		count_vm_events(SWPOUT_ZERO, nr_pages);
   219		if (objcg) {
 > 220			count_objcg_events(objcg, SWPOUT_ZERO, nr_pages);
   221			obj_cgroup_put(objcg);
   222		}
   223	}
   224	

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