[akpm-mm:mm-unstable 253/254] include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   5555a83c82d66729e4abaf16ae28d6bd81f9a64a
commit: fba5261e0039dcf4de077fd12ea9ae2501d92b88 [253/254] mm: replace free hugepage folios after migration
config: i386-buildonly-randconfig-004-20241220 (https://download.01.org/0day-ci/archive/20241220/202412201800.vhgfNG83-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412201800.vhgfNG83-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/202412201800.vhgfNG83-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from mm/mincore.c:19:
>> include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios' [-Wmissing-prototypes]
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         |     ^
   include/linux/hugetlb.h:1063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         | ^
         | static 
   1 warning generated.
--
   In file included from mm/pagewalk.c:5:
>> include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios' [-Wmissing-prototypes]
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         |     ^
   include/linux/hugetlb.h:1063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         | ^
         | static 
   In file included from mm/pagewalk.c:12:
   In file included from mm/internal.h:13:
   include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
   3 warnings generated.
--
   In file included from mm/vmalloc.c:41:
>> include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios' [-Wmissing-prototypes]
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         |     ^
   include/linux/hugetlb.h:1063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         | ^
         | static 
   In file included from mm/vmalloc.c:50:
   In file included from mm/internal.h:13:
   include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
   mm/vmalloc.c:1938:20: warning: unused function 'setup_vmalloc_vm' [-Wunused-function]
    1938 | static inline void setup_vmalloc_vm(struct vm_struct *vm,
         |                    ^~~~~~~~~~~~~~~~
   4 warnings generated.
--
   In file included from mm/mremap.c:12:
   include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
   In file included from mm/mremap.c:13:
>> include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios' [-Wmissing-prototypes]
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         |     ^
   include/linux/hugetlb.h:1063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         | ^
         | static 
   3 warnings generated.
--
   In file included from mm/page_alloc.c:44:
   include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
   In file included from mm/page_alloc.c:46:
   In file included from include/linux/migrate.h:8:
>> include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios' [-Wmissing-prototypes]
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         |     ^
   include/linux/hugetlb.h:1063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         | ^
         | static 
   mm/page_alloc.c:2933:2: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    2933 |         __count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:139:34: note: expanded from macro '__count_zid_vm_events'
     139 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   mm/page_alloc.c:3050:3: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    3050 |                 __count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:139:34: note: expanded from macro '__count_zid_vm_events'
     139 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   mm/page_alloc.c:4692:2: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    4692 |         __count_zid_vm_events(PGALLOC, zone_idx(zone), nr_account);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:139:34: note: expanded from macro '__count_zid_vm_events'
     139 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   6 warnings generated.
--
   In file included from mm/vmscan.c:30:
   include/linux/mm_inline.h:47:41: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      47 |         __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
         |                                    ~~~~~~~~~~~ ^ ~~~
   include/linux/mm_inline.h:49:22: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
      49 |                                 NR_ZONE_LRU_BASE + lru, nr_pages);
         |                                 ~~~~~~~~~~~~~~~~ ^ ~~~
   In file included from mm/vmscan.c:42:
   In file included from include/linux/migrate.h:8:
>> include/linux/hugetlb.h:1063:5: warning: no previous prototype for function 'replace_free_hugepage_folios' [-Wmissing-prototypes]
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         |     ^
   include/linux/hugetlb.h:1063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1063 | int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
         | ^
         | static 
   mm/vmscan.c:409:51: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     409 |                         size += zone_page_state(zone, NR_ZONE_LRU_BASE + lru);
         |                                                       ~~~~~~~~~~~~~~~~ ^ ~~~
   mm/vmscan.c:1773:4: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    1773 |                         __count_zid_vm_events(PGSCAN_SKIP, zid, nr_skipped[zid]);
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:139:34: note: expanded from macro '__count_zid_vm_events'
     139 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   mm/vmscan.c:2279:51: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    2279 |         inactive = lruvec_page_state(lruvec, NR_LRU_BASE + inactive_lru);
         |                                              ~~~~~~~~~~~ ^ ~~~~~~~~~~~~
   mm/vmscan.c:2280:49: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
    2280 |         active = lruvec_page_state(lruvec, NR_LRU_BASE + active_lru);
         |                                            ~~~~~~~~~~~ ^ ~~~~~~~~~~
   mm/vmscan.c:6239:3: warning: arithmetic between different enumeration types ('enum vm_event_item' and 'enum zone_type') [-Wenum-enum-conversion]
    6239 |                 __count_zid_vm_events(ALLOCSTALL, sc->reclaim_idx, 1);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:139:34: note: expanded from macro '__count_zid_vm_events'
     139 |         __count_vm_events(item##_NORMAL - ZONE_NORMAL + zid, delta)
         |                           ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   8 warnings generated.


vim +/replace_free_hugepage_folios +1063 include/linux/hugetlb.h

  1062	
> 1063	int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn)
  1064	{
  1065		return 0;
  1066	}
  1067	

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