[kbuild-all] [arm64:for-next/faultaround 1/10] mm/filemap.c:3056:3: error: implicit declaration of function 'update_mmu_cache'; did you mean

tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/faultaround head: de591a82f41b61af4a8fce49d21b43105c5c2186 commit: f9ce0be71d1fbb038ada15ced83474b0e63f264d [1/10] mm: Cleanup faultaround and finish_fault() codepaths config: microblaze-randconfig-r014-20210209 (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?i... git remote add arm64 https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git git fetch --no-tags arm64 for-next/faultaround git checkout f9ce0be71d1fbb038ada15ced83474b0e63f264d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the arm64/for-next/faultaround HEAD de591a82f41b61af4a8fce49d21b43105c5c2186 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): mm/filemap.c: In function 'filemap_map_pages': 3056 | update_mmu_cache(vma, vmf->address, vmf->pte); | ^~~~~~~~~~~~~~~~ | update_mmu_tlb cc1: some warnings being treated as errors vim +3056 mm/filemap.c 3013 3014 vm_fault_t filemap_map_pages(struct vm_fault *vmf, 3015 pgoff_t start_pgoff, pgoff_t end_pgoff) 3016 { 3017 struct vm_area_struct *vma = vmf->vma; 3018 struct file *file = vma->vm_file; 3019 struct address_space *mapping = file->f_mapping; 3020 pgoff_t last_pgoff = start_pgoff; 3021 unsigned long address = vmf->address; 3022 XA_STATE(xas, &mapping->i_pages, start_pgoff); 3023 struct page *head, *page; 3024 unsigned int mmap_miss = READ_ONCE(file->f_ra.mmap_miss); 3025 vm_fault_t ret = 0; 3026 3027 rcu_read_lock(); 3028 head = first_map_page(mapping, &xas, end_pgoff); 3029 if (!head) 3030 goto out; 3031 3032 if (filemap_map_pmd(vmf, head)) { 3033 ret = VM_FAULT_NOPAGE; 3034 goto out; 3035 } 3036 3037 vmf->address = vma->vm_start + ((start_pgoff - vma->vm_pgoff) << PAGE_SHIFT); 3038 vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address, &vmf->ptl); 3039 do { 3040 page = find_subpage(head, xas.xa_index); 3041 if (PageHWPoison(page)) 3042 goto unlock; 3043 3044 if (mmap_miss > 0) 3045 mmap_miss--; 3046 3047 vmf->address += (xas.xa_index - last_pgoff) << PAGE_SHIFT; 3048 vmf->pte += xas.xa_index - last_pgoff; 3049 last_pgoff = xas.xa_index; 3050 3051 if (!pte_none(*vmf->pte)) 3052 goto unlock; 3053 3054 do_set_pte(vmf, page); 3055 /* no need to invalidate: a not-present page won't be cached */ 3057 unlock_page(head); 3058 3059 /* The fault is handled */ 3060 if (vmf->address == address) 3061 ret = VM_FAULT_NOPAGE; 3062 continue; 3063 unlock: 3064 unlock_page(head); 3065 put_page(head); 3066 } while ((head = next_map_page(mapping, &xas, end_pgoff)) != NULL); 3067 pte_unmap_unlock(vmf->pte, vmf->ptl); 3068 out: 3069 rcu_read_unlock(); 3070 vmf->address = address; 3071 WRITE_ONCE(file->f_ra.mmap_miss, mmap_miss); 3072 return ret; 3073 } 3074 EXPORT_SYMBOL(filemap_map_pages); 3075 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org