Hi Muhammad, kernel test robot noticed the following build errors: [auto build test ERROR on next-20230418] [cannot apply to akpm-mm/mm-everything linus/master v6.3-rc7 v6.3-rc6 v6.3-rc5 v6.3-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/Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230419-190920 patch link: https://lore.kernel.org/r/20230419110716.4113627-3-usama.anjum%40collabora.com patch subject: [PATCH v15 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs config: s390-randconfig-r044-20230416 (https://download.01.org/0day-ci/archive/20230419/202304192347.QsBHpCUb-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 12.1.0 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://github.com/intel-lab-lkp/linux/commit/b4a176ae0c875b07b49d2e3539699065438be9b1 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230419-190920 git checkout b4a176ae0c875b07b49d2e3539699065438be9b1 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash fs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304192347.QsBHpCUb-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): fs/proc/task_mmu.c: In function 'do_pagemap_scan': >> fs/proc/task_mmu.c:2177:41: error: 'vma' undeclared (first use in this function) 2177 | vma->vm_mm, start, end); | ^~~ fs/proc/task_mmu.c:2177:41: note: each undeclared identifier is reported only once for each function it appears in vim +/vma +2177 fs/proc/task_mmu.c 2128 2129 static long do_pagemap_scan(struct mm_struct *mm, 2130 struct pm_scan_arg __user *uarg) 2131 { 2132 unsigned long start, end, walk_start, walk_end; 2133 unsigned long empty_slots, vec_index = 0; 2134 struct mmu_notifier_range range; 2135 struct page_region __user *vec; 2136 struct pagemap_scan_private p; 2137 struct pm_scan_arg arg; 2138 int ret = 0; 2139 2140 if (copy_from_user(&arg, uarg, sizeof(arg))) 2141 return -EFAULT; 2142 2143 start = untagged_addr((unsigned long)arg.start); 2144 vec = (struct page_region *)untagged_addr((unsigned long)arg.vec); 2145 2146 ret = pagemap_scan_args_valid(&arg, start, vec); 2147 if (ret) 2148 return ret; 2149 2150 end = start + arg.len; 2151 p.max_pages = arg.max_pages; 2152 p.found_pages = 0; 2153 p.flags = arg.flags; 2154 p.required_mask = arg.required_mask; 2155 p.anyof_mask = arg.anyof_mask; 2156 p.excluded_mask = arg.excluded_mask; 2157 p.return_mask = arg.return_mask; 2158 p.cur.len = 0; 2159 p.cur.start = 0; 2160 p.vec = NULL; 2161 p.vec_len = PAGEMAP_WALK_SIZE >> PAGE_SHIFT; 2162 2163 /* 2164 * Allocate smaller buffer to get output from inside the page walk 2165 * functions and walk page range in PAGEMAP_WALK_SIZE size chunks. As 2166 * we want to return output to user in compact form where no two 2167 * consecutive regions should be continuous and have the same flags. 2168 * So store the latest element in p.cur between different walks and 2169 * store the p.cur at the end of the walk to the user buffer. 2170 */ 2171 p.vec = kmalloc_array(p.vec_len, sizeof(*p.vec), GFP_KERNEL); 2172 if (!p.vec) 2173 return -ENOMEM; 2174 2175 if (p.flags & PM_SCAN_OP_WP) { 2176 mmu_notifier_range_init(&range, MMU_NOTIFY_PROTECTION_VMA, 0, > 2177 vma->vm_mm, start, end); 2178 mmu_notifier_invalidate_range_start(&range); 2179 } 2180 2181 walk_start = walk_end = start; 2182 while (walk_end < end && !ret) { 2183 p.vec_index = 0; 2184 2185 empty_slots = arg.vec_len - vec_index; 2186 p.vec_len = min(p.vec_len, empty_slots); 2187 2188 walk_end = (walk_start + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK; 2189 if (walk_end > end) 2190 walk_end = end; 2191 2192 ret = mmap_read_lock_killable(mm); 2193 if (ret) 2194 goto free_data; 2195 ret = walk_page_range(mm, walk_start, walk_end, 2196 &pagemap_scan_ops, &p); 2197 mmap_read_unlock(mm); 2198 2199 if (ret && ret != -ENOSPC && ret != PM_SCAN_FOUND_MAX_PAGES) 2200 goto free_data; 2201 2202 walk_start = walk_end; 2203 if (p.vec_index) { 2204 if (copy_to_user(&vec[vec_index], p.vec, 2205 p.vec_index * sizeof(*p.vec))) { 2206 /* 2207 * Return error even though the OP succeeded 2208 */ 2209 ret = -EFAULT; 2210 goto free_data; 2211 } 2212 vec_index += p.vec_index; 2213 } 2214 } 2215 2216 if (p.flags & PM_SCAN_OP_WP) 2217 mmu_notifier_invalidate_range_end(&range); 2218 2219 if (p.cur.len) { 2220 if (copy_to_user(&vec[vec_index], &p.cur, sizeof(*p.vec))) { 2221 ret = -EFAULT; 2222 goto free_data; 2223 } 2224 vec_index++; 2225 } 2226 2227 ret = vec_index; 2228 2229 free_data: 2230 kfree(p.vec); 2231 return ret; 2232 } 2233 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
