tree: https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git locks-next head: d252e76f8180b23e595949307ce3af3fe84a6150 commit: d252e76f8180b23e595949307ce3af3fe84a6150 [4/4] fs: remove mandatory file locking support config: x86_64-randconfig-a012-20210820 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d9c5613e856cf2addfbf892fc4c1ce9ef9feceaa) 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://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git/commit/... git remote add jlayton https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git git fetch --no-tags jlayton locks-next git checkout d252e76f8180b23e595949307ce3af3fe84a6150 # 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(a)intel.com&gt; All warnings (new ones prefixed by >>): out_err: ^~~~~~~~ 1 warning generated. vim +/out_err +322 fs/9p/vfs_file.c 1d769cd192fc8c M. Mohan Kumar 2010-09-27 294 a099027c779068 M. Mohan Kumar 2010-09-27 295 /** a099027c779068 M. Mohan Kumar 2010-09-27 296 * v9fs_file_lock_dotl - lock a file (or directory) a099027c779068 M. Mohan Kumar 2010-09-27 297 * @filp: file to be locked a099027c779068 M. Mohan Kumar 2010-09-27 298 * @cmd: lock command a099027c779068 M. Mohan Kumar 2010-09-27 299 * @fl: file lock structure a099027c779068 M. Mohan Kumar 2010-09-27 300 * a099027c779068 M. Mohan Kumar 2010-09-27 301 */ a099027c779068 M. Mohan Kumar 2010-09-27 302 a099027c779068 M. Mohan Kumar 2010-09-27 303 static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl) a099027c779068 M. Mohan Kumar 2010-09-27 304 { 496ad9aa8ef448 Al Viro 2013-01-23 305 struct inode *inode = file_inode(filp); a099027c779068 M. Mohan Kumar 2010-09-27 306 int ret = -ENOLCK; a099027c779068 M. Mohan Kumar 2010-09-27 307 4b8e992392a246 Al Viro 2014-08-19 308 p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %pD\n", 4b8e992392a246 Al Viro 2014-08-19 309 filp, cmd, fl, filp); a099027c779068 M. Mohan Kumar 2010-09-27 310 a099027c779068 M. Mohan Kumar 2010-09-27 311 if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { a099027c779068 M. Mohan Kumar 2010-09-27 312 filemap_write_and_wait(inode->i_mapping); a099027c779068 M. Mohan Kumar 2010-09-27 313 invalidate_mapping_pages(&inode->i_data, 0, -1); a099027c779068 M. Mohan Kumar 2010-09-27 314 } a099027c779068 M. Mohan Kumar 2010-09-27 315 a099027c779068 M. Mohan Kumar 2010-09-27 316 if (IS_SETLK(cmd) || IS_SETLKW(cmd)) a099027c779068 M. Mohan Kumar 2010-09-27 317 ret = v9fs_file_do_lock(filp, cmd, fl); 1d769cd192fc8c M. Mohan Kumar 2010-09-27 318 else if (IS_GETLK(cmd)) 1d769cd192fc8c M. Mohan Kumar 2010-09-27 319 ret = v9fs_file_getlock(filp, fl); a099027c779068 M. Mohan Kumar 2010-09-27 320 else a099027c779068 M. Mohan Kumar 2010-09-27 321 ret = -EINVAL; a099027c779068 M. Mohan Kumar 2010-09-27 @322 out_err: a099027c779068 M. Mohan Kumar 2010-09-27 323 return ret; a099027c779068 M. Mohan Kumar 2010-09-27 324 } a099027c779068 M. Mohan Kumar 2010-09-27 325 :::::: The code at line 322 was first introduced by commit :::::: a099027c779068b834f335cfdc3f2bf10f531dd9 9p: Implement TLOCK :::::: TO: M. Mohan Kumar <mohan(a)in.ibm.com&gt; :::::: CC: Eric Van Hensbergen <ericvh(a)gmail.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org