tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20211116-sysctl-cleanups-v4 head: 5347239461f25fc50aa761923245b9ec4a4aafec commit: 80084262576dad57737fa04b203e1547ff7ad538 [19/35] sysctl: add helper to register a sysctl mount point config: i386-randconfig-c001-20211118 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c46becf500df2a7fb4b4fce16178a036c344315a) 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/mcgrof/linux-next.git/com... git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git git fetch --no-tags mcgrof-next 20211116-sysctl-cleanups-v4 git checkout 80084262576dad57737fa04b203e1547ff7ad538 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): return register_sysctl(path, sysctl_mount_point); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. vim +44 fs/proc/proc_sysctl.c 36 37 /* 38 * Used to create permanently empty directories to serve as mount points. 39 * There are some subtle but important permission checks this allows in the 40 * case of unprivileged mounts. 41 */ 42 struct sysctl_header *register_sysctl_mount_point(const char *path) 43 { 45 } 46 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org