Hi Daniel, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.4-rc3 next-20230523] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Daniel-Bristot-de-Oliveira/tracing-osnoise-Switch-from-PF_NO_SETAFFINITY-to-migrate_disable/20230524-012512 base: linus/master patch link: https://lore.kernel.org/r/a7b2c215c763e95a56fa1258743332b570c81c9d.1684860626.git.bristot%40kernel.org patch subject: [PATCH V2 3/3] tracing/timerlat: Add user-space interface config: x86_64-randconfig-s022 compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://github.com/intel-lab-lkp/linux/commit/89216b54eaf490480bc1929f5780f95a688a91bb git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Daniel-Bristot-de-Oliveira/tracing-osnoise-Switch-from-PF_NO_SETAFFINITY-to-migrate_disable/20230524-012512 git checkout 89216b54eaf490480bc1929f5780f95a688a91bb # 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=x86_64 olddefconfig make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/trace/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202305241531.5ItU2LLm-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> kernel/trace/trace_osnoise.c:2645:5: sparse: sparse: symbol 'osnoise_create_cpu_timerlat_fd' was not declared. Should it be static? -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki