Hi Mike, kernel test robot noticed the following build warnings: [auto build test WARNING on next-20230825] [cannot apply to akpm-mm/mm-everything v6.5-rc7 v6.5-rc6 v6.5-rc5 linus/master v6.5-rc7] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Mike-Kravetz/hugetlb-clear-flags-in-tail-pages-that-will-be-freed-individually/20230826-030805 base: next-20230825 patch link: https://lore.kernel.org/r/20230825190436.55045-13-mike.kravetz%40oracle.com patch subject: [PATCH 12/12] hugetlb: batch TLB flushes when restoring vmemmap config: s390-randconfig-001-20230826 (https://download.01.org/0day-ci/archive/20230826/202308261516.F6FBNktd-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230826/202308261516.F6FBNktd-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/202308261516.F6FBNktd-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/hugetlb_vmemmap.c:516:5: warning: no previous prototype for function '__hugetlb_vmemmap_restore' [-Wmissing-prototypes] 516 | int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, bool bulk) | ^ mm/hugetlb_vmemmap.c:516:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 516 | int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, bool bulk) | ^ | static mm/hugetlb_vmemmap.c:567:28: error: use of undeclared identifier 'TLB_FLUSH_ALL' 567 | flush_tlb_kernel_range(0, TLB_FLUSH_ALL); | ^ mm/hugetlb_vmemmap.c:673:6: warning: no previous prototype for function 'hugetlb_vmemmap_optimize_bulk' [-Wmissing-prototypes] 673 | void hugetlb_vmemmap_optimize_bulk(const struct hstate *h, struct page *head, | ^ mm/hugetlb_vmemmap.c:673:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 673 | void hugetlb_vmemmap_optimize_bulk(const struct hstate *h, struct page *head, | ^ | static mm/hugetlb_vmemmap.c:679:6: warning: no previous prototype for function 'hugetlb_vmemmap_split' [-Wmissing-prototypes] 679 | void hugetlb_vmemmap_split(const struct hstate *h, struct page *head) | ^ mm/hugetlb_vmemmap.c:679:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 679 | void hugetlb_vmemmap_split(const struct hstate *h, struct page *head) | ^ | static mm/hugetlb_vmemmap.c:710:28: error: use of undeclared identifier 'TLB_FLUSH_ALL' 710 | flush_tlb_kernel_range(0, TLB_FLUSH_ALL); | ^ mm/hugetlb_vmemmap.c:715:28: error: use of undeclared identifier 'TLB_FLUSH_ALL' 715 | flush_tlb_kernel_range(0, TLB_FLUSH_ALL); | ^ 3 warnings and 3 errors generated. vim +/__hugetlb_vmemmap_restore +516 mm/hugetlb_vmemmap.c 515 > 516 int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, bool bulk) 517 { 518 int ret; 519 unsigned long vmemmap_start = (unsigned long)head, vmemmap_end; 520 unsigned long vmemmap_reuse; 521 522 if (!HPageVmemmapOptimized(head)) 523 return 0; 524 525 vmemmap_end = vmemmap_start + hugetlb_vmemmap_size(h); 526 vmemmap_reuse = vmemmap_start; 527 vmemmap_start += HUGETLB_VMEMMAP_RESERVE_SIZE; 528 529 /* 530 * The pages which the vmemmap virtual address range [@vmemmap_start, 531 * @vmemmap_end) are mapped to are freed to the buddy allocator, and 532 * the range is mapped to the page which @vmemmap_reuse is mapped to. 533 * When a HugeTLB page is freed to the buddy allocator, previously 534 * discarded vmemmap pages must be allocated and remapping. 535 */ 536 ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse, bulk); 537 if (!ret) { 538 ClearHPageVmemmapOptimized(head); 539 static_branch_dec(&hugetlb_optimize_vmemmap_key); 540 } 541 542 return ret; 543 } 544 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
