[anolis-intel-cloud:devel-5.10 0/1] mm/memory_hotplug.c:452:12: warning: no previous prototype for function '__remove_pfn_range_from_zone'

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

Hi Yang,

FYI, the error/warning still remains.

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-5.10
head:   fb3dc582fdefab0d6ab237b393b1e7e7f65dc78c
commit: f5bc00581306fa4057d2e3a84b9a347c1ada021e [0/1] anolis: mm/memory_hotplug: refactor remove_pfn_range_from_zone()
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20251202/202512021204.32jcdmBi-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project b3428bb966f1de8aa48375ffee0eba04ede133b7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251202/202512021204.32jcdmBi-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/202512021204.32jcdmBi-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/memory_hotplug.c:452:12: warning: no previous prototype for function '__remove_pfn_range_from_zone' [-Wmissing-prototypes]
     452 | void __ref __remove_pfn_range_from_zone(struct zone *zone,
         |            ^
   mm/memory_hotplug.c:452:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     452 | void __ref __remove_pfn_range_from_zone(struct zone *zone,
         | ^
         | static 
   mm/memory_hotplug.c:681:12: warning: no previous prototype for function '__move_pfn_range_to_zone' [-Wmissing-prototypes]
     681 | void __ref __move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
         |            ^
   mm/memory_hotplug.c:681:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     681 | void __ref __move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
         | ^
         | static 
   mm/memory_hotplug.c:1013:6: warning: no previous prototype for function '__adjust_present_page_count' [-Wmissing-prototypes]
    1013 | void __adjust_present_page_count(struct page *page, struct memory_group *group,
         |      ^
   mm/memory_hotplug.c:1013:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1013 | void __adjust_present_page_count(struct page *page, struct memory_group *group,
         | ^
         | static 
   3 warnings generated.


vim +/__remove_pfn_range_from_zone +452 mm/memory_hotplug.c

   451	
 > 452	void __ref __remove_pfn_range_from_zone(struct zone *zone,
   453					      unsigned long start_pfn,
   454					      unsigned long nr_pages,
   455						  int phase)
   456	{
   457		const unsigned long end_pfn = start_pfn + nr_pages;
   458		struct pglist_data *pgdat = zone->zone_pgdat;
   459		unsigned long pfn, cur_nr_pages, flags;
   460	
   461		if (phase == MHP_PHASE_DEFAULT || phase == MHP_PHASE_DEFERRED) {
   462			/* Poison struct pages because they are now uninitialized again. */
   463			for (pfn = start_pfn; pfn < end_pfn; pfn += cur_nr_pages) {
   464				cond_resched();
   465	
   466				/* Select all remaining pages up to the next section boundary */
   467				cur_nr_pages =
   468					min(end_pfn - pfn, SECTION_ALIGN_UP(pfn + 1) - pfn);
   469				page_init_poison(pfn_to_page(pfn),
   470						sizeof(struct page) * cur_nr_pages);
   471			}
   472		}
   473	

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