Hi Venky, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on ceph-client/for-linus] [also build test ERROR on v5.14-rc6 next-20210818] [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/Venky-Shankar/ceph-add-debugfs-e... base: https://github.com/ceph/ceph-client.git for-linus config: hexagon-randconfig-r025-20210817 (attached as .config) compiler: clang version 12.0.0 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/93ace7e15eedcf62ee9a96c7396482133... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Venky-Shankar/ceph-add-debugfs-entries-signifying-new-mount-syntax-support/20210818-140321 git checkout 93ace7e15eedcf62ee9a96c7396482133470e651 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon 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 >>): } ^ 1 error generated. vim +492 net/ceph/debugfs.c 489 490 struct dentry *ceph_debugfs_create_subdir(const char *subdir) 491 { 493 EXPORT_SYMBOL(ceph_debugfs_create_subdir); 494 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org