Hi NeilBrown, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.19-rc2 next-20220614] [cannot apply to trondmy-nfs/linux-next viro-vfs/for-next] [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/intel-lab-lkp/linux/commits/NeilBrown/Allow-concurrent-directory-updates/20220614-072355 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 config: i386-randconfig-s001-20220613 (https://download.01.org/0day-ci/archive/20220614/202206142059.8hhAq16w-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-30-g92122700-dirty # https://github.com/intel-lab-lkp/linux/commit/46a2afd9f68f24a42f38f3a8afebafe7e494e9d8 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review NeilBrown/Allow-concurrent-directory-updates/20220614-072355 git checkout 46a2afd9f68f24a42f38f3a8afebafe7e494e9d8 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> fs/namei.c:3175:15: sparse: sparse: symbol 'lock_rename_lookup_excl' was not declared. Should it be static? fs/namei.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...): include/linux/rcupdate.h:726:9: sparse: sparse: context imbalance in 'terminate_walk' - unexpected unlock include/linux/rcupdate.h:726:9: sparse: sparse: context imbalance in 'try_to_unlazy' - unexpected unlock include/linux/rcupdate.h:726:9: sparse: sparse: context imbalance in 'try_to_unlazy_next' - unexpected unlock fs/namei.c:2492:19: sparse: sparse: context imbalance in 'path_init' - different lock contexts for basic block -- 0-DAY CI Kernel Test Service https://01.org/lkp