Hi Mark, I love your patch! Perhaps something to improve: [auto build test WARNING on tip/locking/core] [also build test WARNING on linux/master linus/master v5.10-rc7 next-20201209] [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/Mark-Rutland/lockdep-report-brok... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git cb262935a166bdef0ccfe6e2adffa00c0f2d038a config: mips-randconfig-r026-20201209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344) 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 # install mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://github.com/0day-ci/linux/commit/01544766d5d8d1aa2604444debae272f5... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mark-Rutland/lockdep-report-broken-irq-restoration/20201210-023758 git checkout 01544766d5d8d1aa2604444debae272f53f058f9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): void warn_bogus_irq_restore(bool *warned) ^ kernel/locking/irqflag-debug.c:5:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void warn_bogus_irq_restore(bool *warned) ^ static 1 warning generated. vim +/warn_bogus_irq_restore +5 kernel/locking/irqflag-debug.c 4 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org