tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 2f423131bebaa5a4f4b8cf460d96245e93a40905 commit: 0f47c75aeb7aae02c433e322ebbd4d6d757418d5 [174/199] mm: support multi-size THP numa balancing config: x86_64-randconfig-123-20240327 (https://download.01.org/0day-ci/archive/20240328/202403280834.zWjRlaM9-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240328/202403280834.zWjRlaM9-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/202403280834.zWjRlaM9-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/memory.c:5094:25: warning: variable 'pte' is uninitialized when used here [-Wuninitialized] 5094 | writable = pte_write(pte); | ^~~ mm/memory.c:5083:3: note: variable 'pte' is declared here 5083 | pte_t pte, old_pte; | ^ 1 warning generated. vim +/pte +5094 mm/memory.c 5070 5071 static void numa_rebuild_large_mapping(struct vm_fault *vmf, struct vm_area_struct *vma, 5072 struct folio *folio, pte_t fault_pte, bool ignore_writable) 5073 { 5074 int nr = pte_pfn(fault_pte) - folio_pfn(folio); 5075 unsigned long start = max(vmf->address - nr * PAGE_SIZE, vma->vm_start); 5076 unsigned long end = min(start + folio_nr_pages(folio) * PAGE_SIZE, vma->vm_end); 5077 pte_t *start_ptep = vmf->pte - (vmf->address - start) / PAGE_SIZE; 5078 bool pte_write_upgrade = vma_wants_manual_pte_write_upgrade(vma); 5079 unsigned long addr; 5080 5081 /* Restore all PTEs' mapping of the large folio */ 5082 for (addr = start; addr != end; start_ptep++, addr += PAGE_SIZE) { 5083 pte_t pte, old_pte; 5084 pte_t ptent = ptep_get(start_ptep); 5085 bool writable = false; 5086 5087 if (!pte_present(ptent) || !pte_protnone(ptent)) 5088 continue; 5089 5090 if (vm_normal_folio(vma, addr, ptent) != folio) 5091 continue; 5092 5093 if (!ignore_writable) { > 5094 writable = pte_write(pte); 5095 if (!writable && pte_write_upgrade && 5096 can_change_pte_writable(vma, addr, pte)) 5097 writable = true; 5098 } 5099 5100 old_pte = ptep_modify_prot_start(vma, addr, start_ptep); 5101 pte = pte_modify(old_pte, vma->vm_page_prot); 5102 pte = pte_mkyoung(pte); 5103 if (writable) 5104 pte = pte_mkwrite(pte, vma); 5105 ptep_modify_prot_commit(vma, addr, start_ptep, old_pte, pte); 5106 update_mmu_cache_range(vmf, vma, addr, start_ptep, 1); 5107 } 5108 } 5109 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
