[davidhildenbrand:nth_page 13/34] mm/hugetlb.c:3250:28: error: use of undeclared identifier 'pfn'

[davidhildenbrand:nth_page 13/34] mm/hugetlb.c:3250:28: error: use of undeclared identifier 'pfn'

[kernel test robot]

tree:   https://github.com/davidhildenbrand/linux nth_page
head:   6604ef076c5814154b00afdb7ea9ce90fd598b08
commit: a81868b2ce05b94ec839ecbb2bb93376cf44c724 [13/34] mm/hugetlb: cleanup hugetlb_folio_init_tail_vmemmap()
config: i386-buildonly-randconfig-003-20250823 (https://download.01.org/0day-ci/archive/20250823/202508231549.LAQRn060-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250823/202508231549.LAQRn060-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/202508231549.LAQRn060-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/hugetlb.c:3250:28: error: use of undeclared identifier 'pfn'
    3250 |                 __init_single_page(page, pfn, zone, nid);
         |                                          ^
   1 error generated.


vim +/pfn +3250 mm/hugetlb.c

aa888a74977a8f2 Andi Kleen        2008-07-23  3232  
fde1c4ecf91640e Usama Arif        2023-09-13  3233  /* Initialize [start_page:end_page_number] tail struct pages of a hugepage */
fde1c4ecf91640e Usama Arif        2023-09-13  3234  static void __init hugetlb_folio_init_tail_vmemmap(struct folio *folio,
fde1c4ecf91640e Usama Arif        2023-09-13  3235  					unsigned long start_page_number,
fde1c4ecf91640e Usama Arif        2023-09-13  3236  					unsigned long end_page_number)
fde1c4ecf91640e Usama Arif        2023-09-13  3237  {
fde1c4ecf91640e Usama Arif        2023-09-13  3238  	enum zone_type zone = zone_idx(folio_zone(folio));
fde1c4ecf91640e Usama Arif        2023-09-13  3239  	int nid = folio_nid(folio);
a81868b2ce05b94 David Hildenbrand 2025-08-07  3240  	struct page *head_page = folio_page(folio, 0);
a81868b2ce05b94 David Hildenbrand 2025-08-07  3241  	struct page *page = folio_page(folio, start_page_number);
a81868b2ce05b94 David Hildenbrand 2025-08-07  3242  	unsigned long i;
fde1c4ecf91640e Usama Arif        2023-09-13  3243  	int ret;
fde1c4ecf91640e Usama Arif        2023-09-13  3244  
a81868b2ce05b94 David Hildenbrand 2025-08-07  3245  	/*
a81868b2ce05b94 David Hildenbrand 2025-08-07  3246  	 * We mark all tail pages with memblock_reserved_mark_noinit(),
a81868b2ce05b94 David Hildenbrand 2025-08-07  3247  	 * so these pages are completely uninitialized.
a81868b2ce05b94 David Hildenbrand 2025-08-07  3248  	 */
a81868b2ce05b94 David Hildenbrand 2025-08-07  3249  	for (i = start_page_number; i < end_page_number; i++, page++) {
fde1c4ecf91640e Usama Arif        2023-09-13 @3250  		__init_single_page(page, pfn, zone, nid);
a81868b2ce05b94 David Hildenbrand 2025-08-07  3251  		prep_compound_tail(head_page, i);
a81868b2ce05b94 David Hildenbrand 2025-08-07  3252  		set_page_count(page, 0);
fde1c4ecf91640e Usama Arif        2023-09-13  3253  	}
fde1c4ecf91640e Usama Arif        2023-09-13  3254  }
fde1c4ecf91640e Usama Arif        2023-09-13  3255  

:::::: The code at line 3250 was first introduced by commit
:::::: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 mm: hugetlb: skip initialization of gigantic tail struct pages if freed by HVO

:::::: TO: Usama Arif <usama.arif@bytedance.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>

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