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charset=us-ascii Content-Disposition: inline In-Reply-To: <20250415054705.370412-1-osalvador@suse.de> Hi Oscar, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Oscar-Salvador/mm-hugetlb-Reset-mapping-to-TAIL_MAPPING-before-restoring-vmemmap/20250415-134835 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20250415054705.370412-1-osalvador%40suse.de patch subject: [PATCH] mm, hugetlb: Reset mapping to TAIL_MAPPING before restoring vmemmap config: x86_64-buildonly-randconfig-006-20250416 (https://download.01.org/0day-ci/archive/20250416/202504161522.S1qEFD4b-lkp@intel.com/config) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250416/202504161522.S1qEFD4b-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202504161522.S1qEFD4b-lkp@intel.com/ All errors (new ones prefixed by >>): >> mm/hugetlb_vmemmap.c:506:2: error: call to undeclared function 'set_hugetlb_cgroup'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 506 | set_hugetlb_cgroup(folio, TAIL_MAPPING); | ^ 1 error generated. vim +/set_hugetlb_cgroup +506 mm/hugetlb_vmemmap.c 488 489 /** 490 * hugetlb_vmemmap_restore_folio - restore previously optimized (by 491 * hugetlb_vmemmap_optimize_folio()) vmemmap pages which 492 * will be reallocated and remapped. 493 * @h: struct hstate. 494 * @folio: the folio whose vmemmap pages will be restored. 495 * 496 * Return: %0 if @folio's vmemmap pages have been reallocated and remapped, 497 * negative error code otherwise. 498 */ 499 int hugetlb_vmemmap_restore_folio(const struct hstate *h, struct folio *folio) 500 { 501 /* 502 * Before restoring vmemmap, make sure to reset mapping to TAIL_MAPPING, 503 * so tail pages that were reset will have the right thing after being 504 * restored, and the checks in free_tail_page_prepare() will pass. 505 */ > 506 set_hugetlb_cgroup(folio, TAIL_MAPPING); 507 return __hugetlb_vmemmap_restore_folio(h, folio, VMEMMAP_SYNCHRONIZE_RCU); 508 } 509 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki