Hi Daniel, I love your patch! Perhaps something to improve: [auto build test WARNING on rostedt-trace/for-next] [also build test WARNING on tip/sched/core] [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/The-Runtime-Verification-RV-interface/20220714-052220 base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20220718/202207180927.O9kBl2xY-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://github.com/intel-lab-lkp/linux/commit/f83faf07d0dad6cfd8fb22ff38b752dd7619bfc0 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Daniel-Bristot-de-Oliveira/The-Runtime-Verification-RV-interface/20220714-052220 git checkout f83faf07d0dad6cfd8fb22ff38b752dd7619bfc0 # 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 SHELL=/bin/bash drivers/misc/lkdtm/ kernel/trace/rv/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> kernel/trace/rv/reactor_panic.c:21:19: sparse: sparse: symbol 'rv_panic' was not declared. Should it be static? >> kernel/trace/rv/reactor_panic.c:27:5: sparse: sparse: symbol 'register_react_panic' was not declared. Should it be static? >> kernel/trace/rv/reactor_panic.c:33:6: sparse: sparse: symbol 'unregister_react_panic' was not declared. Should it be static? -- 0-DAY CI Kernel Test Service https://01.org/lkp