tree: https://git.kernel.org/pub/scm/linux/kernel/git/xiang/linux.git erofs/compr_cfgs head: 55a0af72ff27aefaa628c9e350c8ef6e22803978 commit: 55a0af72ff27aefaa628c9e350c8ef6e22803978 [6/6] erofs: add on-disk compression configurations config: arm64-randconfig-r021-20210308 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 820f508b08d7c94b2dd7847e9710d2bc36d3dd45) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/xiang/linux.git/commit/?i... git remote add xiang-linux https://git.kernel.org/pub/scm/linux/kernel/git/xiang/linux.git git fetch --no-tags xiang-linux erofs/compr_cfgs git checkout 55a0af72ff27aefaa628c9e350c8ef6e22803978 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): if (sbi->sb_size > EROFS_BLKSIZ) { ~~~~~~~~~~~~ ^ ~~~~~~~~~~~~ fs/erofs/super.c:126:14: warning: unused function 'erofs_read_metadata' [-Wunused-function] static void *erofs_read_metadata(struct super_block *sb, struct page **pagep, ^ 2 warnings generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for MXC_CLK_SCU Depends on COMMON_CLK && ARCH_MXC && IMX_SCU && HAVE_ARM_SMCCC Selected by - CLK_IMX8QXP && COMMON_CLK && (ARCH_MXC && ARM64 || COMPILE_TEST && IMX_SCU && HAVE_ARM_SMCCC vim +302 fs/erofs/super.c 256 257 static int erofs_read_superblock(struct super_block *sb) 258 { 259 struct erofs_sb_info *sbi; 260 struct page *page; 261 struct erofs_super_block *dsb; 262 unsigned int blkszbits; 263 void *data; 264 int ret; 265 266 page = read_mapping_page(sb->s_bdev->bd_inode->i_mapping, 0, NULL); 267 if (IS_ERR(page)) { 268 erofs_err(sb, "cannot read erofs superblock"); 269 return PTR_ERR(page); 270 } 271 272 sbi = EROFS_SB(sb); 273 274 data = kmap(page); 275 dsb = (struct erofs_super_block *)(data + EROFS_SUPER_OFFSET); 276 277 ret = -EINVAL; 278 if (le32_to_cpu(dsb->magic) != EROFS_SUPER_MAGIC_V1) { 279 erofs_err(sb, "cannot find valid erofs superblock"); 280 goto out; 281 } 282 283 sbi->feature_compat = le32_to_cpu(dsb->feature_compat); 284 if (erofs_sb_has_sb_chksum(sbi)) { 285 ret = erofs_superblock_csum_verify(sb, data); 286 if (ret) 287 goto out; 288 } 289 290 blkszbits = dsb->blkszbits; 291 /* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */ 292 if (blkszbits != LOG_BLOCK_SIZE) { 293 erofs_err(sb, "blkszbits %u isn't supported on this platform", 294 blkszbits); 295 goto out; 296 } 297 298 if (!check_layout_compatibility(sb, dsb)) 299 goto out; 300 301 sbi->sb_size = 128 + dsb->sb_extslots * 16; 303 erofs_err(sb, "invalid sb_extslots %u (more than a fs block)", 304 sbi->sb_size); 305 goto out; 306 } 307 308 sbi->blocks = le32_to_cpu(dsb->blocks); 309 sbi->meta_blkaddr = le32_to_cpu(dsb->meta_blkaddr); 310 #ifdef CONFIG_EROFS_FS_XATTR 311 sbi->xattr_blkaddr = le32_to_cpu(dsb->xattr_blkaddr); 312 #endif 313 sbi->islotbits = ilog2(sizeof(struct erofs_inode_compact)); 314 sbi->root_nid = le16_to_cpu(dsb->root_nid); 315 sbi->inos = le64_to_cpu(dsb->inos); 316 317 sbi->build_time = le64_to_cpu(dsb->build_time); 318 sbi->build_time_nsec = le32_to_cpu(dsb->build_time_nsec); 319 320 memcpy(&sb->s_uuid, dsb->uuid, sizeof(dsb->uuid)); 321 322 ret = strscpy(sbi->volume_name, dsb->volume_name, 323 sizeof(dsb->volume_name)); 324 if (ret < 0) { /* -E2BIG */ 325 erofs_err(sb, "bad volume name without NIL terminator"); 326 ret = -EFSCORRUPTED; 327 goto out; 328 } 329 330 /* parse on-disk compression configurations */ 331 if (erofs_sb_has_compr_cfgs(sbi)) 332 ret = erofs_load_compr_cfgs(sb, dsb); 333 else 334 ret = z_erofs_load_lz4_config(sb, dsb, NULL, 0); 335 336 out: 337 kunmap(page); 338 put_page(page); 339 return ret; 340 } 341 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org