Hi Wupeng, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Wupeng-Ma/mm-memory-failure-update-ttu-flag-inside-unmap_poisoned_folio/20250116-142614 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20250116061657.227027-2-mawupeng1%40huawei.com patch subject: [PATCH v2 1/3] mm: memory-failure: update ttu flag inside unmap_poisoned_folio config: x86_64-buildonly-randconfig-002-20250117 (https://download.01.org/0day-ci/archive/20250117/202501171215.KLa8VDaS-lkp@xxxxxxxxx/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/20250117/202501171215.KLa8VDaS-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202501171215.KLa8VDaS-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from mm/memory_hotplug.c:41: mm/internal.h:1142:1: error: expected identifier or '(' before '{' token 1142 | { | ^ >> mm/internal.h:1141:19: warning: 'unmap_poisoned_folio' used but never defined 1141 | static inline int unmap_poisoned_folio(struct folio *folio, unsigned long pfn, bool must_kill); | ^~~~~~~~~~~~~~~~~~~~ vim +/unmap_poisoned_folio +1141 mm/internal.h 1121 1122 extern u32 hwpoison_filter_dev_major; 1123 extern u32 hwpoison_filter_dev_minor; 1124 extern u64 hwpoison_filter_flags_mask; 1125 extern u64 hwpoison_filter_flags_value; 1126 extern u64 hwpoison_filter_memcg; 1127 extern u32 hwpoison_filter_enable; 1128 #define MAGIC_HWPOISON 0x48575053U /* HWPS */ 1129 void SetPageHWPoisonTakenOff(struct page *page); 1130 void ClearPageHWPoisonTakenOff(struct page *page); 1131 bool take_page_off_buddy(struct page *page); 1132 bool put_page_back_buddy(struct page *page); 1133 struct task_struct *task_early_kill(struct task_struct *tsk, int force_early); 1134 void add_to_kill_ksm(struct task_struct *tsk, const struct page *p, 1135 struct vm_area_struct *vma, struct list_head *to_kill, 1136 unsigned long ksm_addr); 1137 unsigned long page_mapped_in_vma(const struct page *page, 1138 struct vm_area_struct *vma); 1139 1140 #else > 1141 static inline int unmap_poisoned_folio(struct folio *folio, unsigned long pfn, bool must_kill); 1142 { 1143 return -EBUSY; 1144 } 1145 #endif 1146 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
