tree: https://github.com/amir73il/linux fsnotify-perf head: 7446ba772ae107ab937cd04e8800236d6235dc4c commit: ae00302ec41c4dae058c61c56a47134ecae77a36 [2/5] fsnotify: count s_fsnotify_inode_refs for attached connectors config: x86_64-rhel-8.3 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/amir73il/linux/commit/ae00302ec41c4dae058c61c56a47134ecae77a36 git remote add amir73il https://github.com/amir73il/linux git fetch --no-tags amir73il fsnotify-perf git checkout ae00302ec41c4dae058c61c56a47134ecae77a36 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): fs/notify/mark.c: In function 'fsnotify_drop_object': >> fs/notify/mark.c:227:22: warning: variable 'sb' set but not used [-Wunused-but-set-variable] 227 | struct super_block *sb; | ^~ vim +/sb +227 fs/notify/mark.c 6b3f05d24d355f Jan Kara 2016-12-21 222 721fb6fbfd2132 Jan Kara 2018-10-17 223 /* Drop object reference originally held by a connector */ 721fb6fbfd2132 Jan Kara 2018-10-17 224 static void fsnotify_drop_object(unsigned int type, void *objp) 721fb6fbfd2132 Jan Kara 2018-10-17 225 { 721fb6fbfd2132 Jan Kara 2018-10-17 226 struct inode *inode; 721fb6fbfd2132 Jan Kara 2018-10-17 @227 struct super_block *sb; 721fb6fbfd2132 Jan Kara 2018-10-17 228 721fb6fbfd2132 Jan Kara 2018-10-17 229 if (!objp) 721fb6fbfd2132 Jan Kara 2018-10-17 230 return; 721fb6fbfd2132 Jan Kara 2018-10-17 231 /* Currently only inode references are passed to be dropped */ 721fb6fbfd2132 Jan Kara 2018-10-17 232 if (WARN_ON_ONCE(type != FSNOTIFY_OBJ_TYPE_INODE)) 721fb6fbfd2132 Jan Kara 2018-10-17 233 return; 721fb6fbfd2132 Jan Kara 2018-10-17 234 inode = objp; 721fb6fbfd2132 Jan Kara 2018-10-17 235 sb = inode->i_sb; ae00302ec41c4d Amir Goldstein 2020-07-26 236 fsnotify_put_inode_ref(inode); 721fb6fbfd2132 Jan Kara 2018-10-17 237 } 721fb6fbfd2132 Jan Kara 2018-10-17 238 :::::: The code at line 227 was first introduced by commit :::::: 721fb6fbfd2132164c2e8777cc837f9b2c1794dc fsnotify: Fix busy inodes during unmount :::::: TO: Jan Kara :::::: CC: Jan Kara --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org