Messages in this thread | | | Date | Fri, 5 Nov 2021 13:35:29 +0800 | Subject | Re: [PATCH 05/11] ubifs: Rename whiteout atomically | From | kernel test robot <> |
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Hi Zhihao,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linux/master] [also build test WARNING on linus/master rw-ubifs/next v5.15-rc7 next-20211029] [cannot apply to rw-ubifs/fixes] [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/Zhihao-Cheng/Some-bugfixs-for-ubifs-ubi/20211025-113114 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2f111a6fd5b5297b4e92f53798ca086f7c7d33a4 config: i386-randconfig-c001-20211028 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5db7568a6a1fcb408eb8988abdaff2a225a8eb72) 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/0day-ci/linux/commit/8a6ca5bc1be93cca9c7b0167a71bdd338f854600 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zhihao-Cheng/Some-bugfixs-for-ubifs-ubi/20211025-113114 git checkout 8a6ca5bc1be93cca9c7b0167a71bdd338f854600 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 clang-analyzer
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
>> fs/ubifs/dir.c:379:2: warning: Value stored to 'ui' is never read [clang-analyzer-deadcode.DeadStores] ui = ubifs_inode(inode); ^ ~~~~~~~~~~~~~~~~~~
vim +/ui +379 fs/ubifs/dir.c
1e51764a3c2ac0 Artem Bityutskiy 2008-07-14 351 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 352 static struct inode *create_whiteout(struct inode *dir, struct dentry *dentry, 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 353 umode_t mode) 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 354 { 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 355 int err; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 356 struct inode *inode; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 357 struct ubifs_inode *ui; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 358 struct ubifs_info *c = dir->i_sb->s_fs_info; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 359 struct fscrypt_name nm; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 360 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 361 /* 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 362 * Create an inode('nlink = 1') for whiteout without updating journal, 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 363 * let ubifs_jnl_rename() store it on flash to complete rename whiteout 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 364 * atomically. 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 365 */ 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 366 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 367 dbg_gen("dent '%pd', mode %#hx in dir ino %lu", 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 368 dentry, mode, dir->i_ino); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 369 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 370 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 371 if (err) 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 372 return ERR_PTR(err); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 373 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 374 inode = ubifs_new_inode(c, dir, mode); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 375 if (IS_ERR(inode)) { 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 376 err = PTR_ERR(inode); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 377 goto out_free; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 378 } 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 @379 ui = ubifs_inode(inode); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 380 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 381 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 382 ubifs_assert(c, inode->i_op == &ubifs_file_inode_operations); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 383 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 384 err = ubifs_init_security(dir, inode, &dentry->d_name); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 385 if (err) 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 386 goto out_inode; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 387 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 388 /* The dir size is updated by do_rename. */ 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 389 insert_inode_hash(inode); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 390 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 391 return inode; 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 392 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 393 out_inode: 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 394 make_bad_inode(inode); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 395 iput(inode); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 396 out_free: 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 397 fscrypt_free_filename(&nm); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 398 ubifs_err(c, "cannot create whiteout file, error %d", err); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 399 return ERR_PTR(err); 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 400 } 8a6ca5bc1be93c Zhihao Cheng 2021-10-25 401
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