tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 890108d01fde2c3b6dde4d169b695ce64362f135 commit: 32955c5422a8a5460bbefe2a6fc51eadcafff4c9 [1605/1605] btrfs: switch to discard_new_inode() config: x86_64-buildonly-randconfig-2001-20250501 (https://download.01.org/0day-ci/archive/20250701/202507011545.DJDFFl5d-lkp@i...) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250701/202507011545.DJDFFl5d-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202507011545.DJDFFl5d-lkp@intel.com/ All warnings (new ones prefixed by >>): fs/btrfs/inode.c:2776:16: warning: variable 'inode' set but not used [-Wunused-but-set-variable] 2776 | struct inode *inode; | ^ fs/btrfs/inode.c:6474:7: warning: variable 'err' set but not used [-Wunused-but-set-variable] 6474 | int err; | ^ fs/btrfs/inode.c:6481:7: warning: variable 'err' set but not used [-Wunused-but-set-variable] 6481 | int err; | ^

...

fs/btrfs/inode.c:6717:6: warning: variable 'drop_on_err' set but not used [-Wunused-but-set-variable] 6717 | int drop_on_err = 0; | ^ 4 warnings generated.

vim +/drop_on_err +6717 fs/btrfs/inode.c 39279cc3d2704c Chris Mason 2007-06-12 6709 18bb1db3e7607e Al Viro 2011-07-26 6710 static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 39279cc3d2704c Chris Mason 2007-06-12 6711 { 2ff7e61e0d30ff Jeff Mahoney 2016-06-22 6712 struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb); b9d86667c94e5f Chris Mason 2008-05-02 6713 struct inode *inode = NULL; 39279cc3d2704c Chris Mason 2007-06-12 6714 struct btrfs_trans_handle *trans; 39279cc3d2704c Chris Mason 2007-06-12 6715 struct btrfs_root *root = BTRFS_I(dir)->root; 39279cc3d2704c Chris Mason 2007-06-12 6716 int err = 0; 39279cc3d2704c Chris Mason 2007-06-12 @6717 int drop_on_err = 0; b9d86667c94e5f Chris Mason 2008-05-02 6718 u64 objectid = 0; 00e4e6b33a0f78 Chris Mason 2008-08-05 6719 u64 index = 0; 39279cc3d2704c Chris Mason 2007-06-12 6720 9ed74f2dba6ebf Josef Bacik 2009-09-11 6721 /* 9ed74f2dba6ebf Josef Bacik 2009-09-11 6722 * 2 items for inode and ref 9ed74f2dba6ebf Josef Bacik 2009-09-11 6723 * 2 items for dir items 9ed74f2dba6ebf Josef Bacik 2009-09-11 6724 * 1 for xattr if selinux is on 9ed74f2dba6ebf Josef Bacik 2009-09-11 6725 */ a22285a6a32390 Yan, Zheng 2010-05-16 6726 trans = btrfs_start_transaction(root, 5); a22285a6a32390 Yan, Zheng 2010-05-16 6727 if (IS_ERR(trans)) a22285a6a32390 Yan, Zheng 2010-05-16 6728 return PTR_ERR(trans); 39279cc3d2704c Chris Mason 2007-06-12 6729 581bb050941b4f Li Zefan 2011-04-20 6730 err = btrfs_find_free_ino(root, &objectid); 581bb050941b4f Li Zefan 2011-04-20 6731 if (err) 581bb050941b4f Li Zefan 2011-04-20 6732 goto out_fail; 581bb050941b4f Li Zefan 2011-04-20 6733 aec7477b3b0e8e Josef Bacik 2008-07-24 6734 inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name, 4a0cc7ca6c40b6 Nikolay Borisov 2017-01-10 6735 dentry->d_name.len, btrfs_ino(BTRFS_I(dir)), objectid, d82a6f1d7e8b61 Josef Bacik 2011-05-11 6736 S_IFDIR | mode, &index); 39279cc3d2704c Chris Mason 2007-06-12 6737 if (IS_ERR(inode)) { 39279cc3d2704c Chris Mason 2007-06-12 6738 err = PTR_ERR(inode); 32955c5422a8a5 Al Viro 2018-05-16 6739 inode = NULL; 39279cc3d2704c Chris Mason 2007-06-12 6740 goto out_fail; 39279cc3d2704c Chris Mason 2007-06-12 6741 } 5f39d397dfbe14 Chris Mason 2007-10-15 6742 39279cc3d2704c Chris Mason 2007-06-12 6743 drop_on_err = 1; b0d5d10f41a0f1 Chris Mason 2014-09-08 6744 /* these must be set before we unlock the inode */ b0d5d10f41a0f1 Chris Mason 2014-09-08 6745 inode->i_op = &btrfs_dir_inode_operations; b0d5d10f41a0f1 Chris Mason 2014-09-08 6746 inode->i_fop = &btrfs_dir_file_operations; 33268eaf0b3db5 Josef Bacik 2008-07-24 6747 2a7dba391e5628 Eric Paris 2011-02-01 6748 err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name); 33268eaf0b3db5 Josef Bacik 2008-07-24 6749 if (err) 32955c5422a8a5 Al Viro 2018-05-16 6750 goto out_fail; 39279cc3d2704c Chris Mason 2007-06-12 6751 6ef06d27903d9c Nikolay Borisov 2017-02-20 6752 btrfs_i_size_write(BTRFS_I(inode), 0); 39279cc3d2704c Chris Mason 2007-06-12 6753 err = btrfs_update_inode(trans, root, inode); 39279cc3d2704c Chris Mason 2007-06-12 6754 if (err) 32955c5422a8a5 Al Viro 2018-05-16 6755 goto out_fail; 5f39d397dfbe14 Chris Mason 2007-10-15 6756 db0a669fb00241 Nikolay Borisov 2017-02-20 6757 err = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode), db0a669fb00241 Nikolay Borisov 2017-02-20 6758 dentry->d_name.name, e02119d5a7b439 Chris Mason 2008-09-05 6759 dentry->d_name.len, 0, index); 39279cc3d2704c Chris Mason 2007-06-12 6760 if (err) 32955c5422a8a5 Al Viro 2018-05-16 6761 goto out_fail; 5f39d397dfbe14 Chris Mason 2007-10-15 6762 1e2e547a93a00e Al Viro 2018-05-04 6763 d_instantiate_new(dentry, inode); 39279cc3d2704c Chris Mason 2007-06-12 6764 drop_on_err = 0; 39279cc3d2704c Chris Mason 2007-06-12 6765 39279cc3d2704c Chris Mason 2007-06-12 6766 out_fail: 3a45bb207ee2c5 Jeff Mahoney 2016-09-09 6767 btrfs_end_transaction(trans); 32955c5422a8a5 Al Viro 2018-05-16 6768 if (err && inode) { c7cfb8a5405a34 Wang Shilong 2014-12-24 6769 inode_dec_link_count(inode); 32955c5422a8a5 Al Viro 2018-05-16 6770 discard_new_inode(inode); c7cfb8a5405a34 Wang Shilong 2014-12-24 6771 } 2ff7e61e0d30ff Jeff Mahoney 2016-06-22 6772 btrfs_btree_balance_dirty(fs_info); 39279cc3d2704c Chris Mason 2007-06-12 6773 return err; 39279cc3d2704c Chris Mason 2007-06-12 6774 } 39279cc3d2704c Chris Mason 2007-06-12 6775 :::::: The code at line 6717 was first introduced by commit :::::: 39279cc3d2704cfbf9c35dcb5bdd392159ae4625 Btrfs: split up super.c :::::: TO: Chris Mason <chris.mason@oracle.com> :::::: CC: David Woodhouse <dwmw2@hera.kernel.org> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki