Hi Konstantin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.9 next-20201016] [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] url: https://github.com/0day-ci/linux/commits/Konstantin-Komarov/NTFS-read-write-driver-GPL-implementation-by-Paragon-Software/20201016-233309 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9ff9b0d392ea08090cd1780fb196f36dbb586529 config: x86_64-randconfig-a011-20201017 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project efd02c1548ee458d59063f6393e94e972b5c3d50) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/3339f0d0890cfe6ed760dc24916de15e74c4f67d git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Konstantin-Komarov/NTFS-read-write-driver-GPL-implementation-by-Paragon-Software/20201016-233309 git checkout 3339f0d0890cfe6ed760dc24916de15e74c4f67d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> fs/ntfs3/attrib.c:1256:7: warning: variable 'hint' is used uninitialized whenever '&&' condition is false [-Wsometimes-uninitialized] if (vcn + clst_data && ^~~~~~~~~~~~~~~ fs/ntfs3/attrib.c:1263:11: note: uninitialized use occurs here hint + 1, len - clst_data, NULL, 0, ^~~~ fs/ntfs3/attrib.c:1256:7: note: remove the '&&' if its condition is always true if (vcn + clst_data && ^~~~~~~~~~~~~~~~~~ fs/ntfs3/attrib.c:1254:18: note: initialize the variable 'hint' to silence this warning CLST alen, hint; ^ = 0 fs/ntfs3/attrib.c:72:20: warning: unused function 'attr_must_be_resident' [-Wunused-function] static inline bool attr_must_be_resident(struct ntfs_sb_info *sbi, ^ 2 warnings generated. vim +1256 fs/ntfs3/attrib.c dc58d89d2835db2 Konstantin Komarov 2020-10-16 1171 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1172 /* dc58d89d2835db2 Konstantin Komarov 2020-10-16 1173 * attr_allocate_frame dc58d89d2835db2 Konstantin Komarov 2020-10-16 1174 * dc58d89d2835db2 Konstantin Komarov 2020-10-16 1175 * allocate/free clusters for 'frame' dc58d89d2835db2 Konstantin Komarov 2020-10-16 1176 */ dc58d89d2835db2 Konstantin Komarov 2020-10-16 1177 int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size, dc58d89d2835db2 Konstantin Komarov 2020-10-16 1178 u64 new_valid) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1179 { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1180 int err = 0; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1181 struct runs_tree *run = &ni->file.run; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1182 struct ntfs_sb_info *sbi = ni->mi.sbi; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1183 struct ATTRIB *attr, *attr_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1184 struct ATTR_LIST_ENTRY *le, *le_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1185 struct mft_inode *mi, *mi_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1186 CLST svcn, evcn1, next_evcn1, next_svcn, lcn, len; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1187 CLST vcn, end, clst_data; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1188 u64 total_size, valid_size, data_size; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1189 bool is_compr; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1190 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1191 le_b = NULL; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1192 attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1193 if (!attr_b) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1194 return -ENOENT; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1195 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1196 if (!is_attr_ext(attr_b)) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1197 return -EINVAL; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1198 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1199 vcn = frame << NTFS_LZNT_CUNIT; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1200 end = vcn + (1u << NTFS_LZNT_CUNIT); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1201 total_size = le64_to_cpu(attr_b->nres.total_size); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1202 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1203 svcn = le64_to_cpu(attr_b->nres.svcn); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1204 evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1205 data_size = le64_to_cpu(attr_b->nres.data_size); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1206 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1207 if (svcn <= vcn && vcn < evcn1) { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1208 attr = attr_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1209 le = le_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1210 mi = mi_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1211 } else if (!le_b) { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1212 err = -EINVAL; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1213 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1214 } else { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1215 le = le_b; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1216 attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, dc58d89d2835db2 Konstantin Komarov 2020-10-16 1217 &mi); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1218 if (!attr) { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1219 err = -EINVAL; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1220 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1221 } dc58d89d2835db2 Konstantin Komarov 2020-10-16 1222 svcn = le64_to_cpu(attr->nres.svcn); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1223 evcn1 = le64_to_cpu(attr->nres.evcn) + 1; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1224 } dc58d89d2835db2 Konstantin Komarov 2020-10-16 1225 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1226 err = attr_load_runs(attr, ni, run, NULL); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1227 if (err) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1228 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1229 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1230 err = attr_is_frame_compressed(ni, attr_b, frame, &clst_data, dc58d89d2835db2 Konstantin Komarov 2020-10-16 1231 &is_compr); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1232 if (err) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1233 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1234 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1235 total_size -= (u64)clst_data << sbi->cluster_bits; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1236 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1237 len = bytes_to_cluster(sbi, compr_size); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1238 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1239 if (len == clst_data) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1240 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1241 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1242 if (len < clst_data) { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1243 err = run_deallocate_ex(sbi, run, vcn + len, clst_data - len, dc58d89d2835db2 Konstantin Komarov 2020-10-16 1244 NULL, true); dc58d89d2835db2 Konstantin Komarov 2020-10-16 1245 if (err) dc58d89d2835db2 Konstantin Komarov 2020-10-16 1246 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1247 dc58d89d2835db2 Konstantin Komarov 2020-10-16 1248 if (!run_add_entry(run, vcn + len, SPARSE_LCN, dc58d89d2835db2 Konstantin Komarov 2020-10-16 1249 clst_data - len)) { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1250 err = -ENOMEM; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1251 goto out; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1252 } dc58d89d2835db2 Konstantin Komarov 2020-10-16 1253 } else { dc58d89d2835db2 Konstantin Komarov 2020-10-16 1254 CLST alen, hint; dc58d89d2835db2 Konstantin Komarov 2020-10-16 1255 /* Get the last lcn to allocate from */ dc58d89d2835db2 Konstantin Komarov 2020-10-16 @1256 if (vcn + clst_data && --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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