Hi Mathieu, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on shuah-kselftest/next] [also build test WARNING on tip/x86/core tip/master linus/master v5.16 next-20220112] [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/Mathieu-Desnoyers/rseq-x86-imple... base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next config: i386-randconfig-a015 (https://download.01.org/0day-ci/archive/20220113/202201130222.lBbn1hO4-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 244dd2913a43a200f5a6544d424cdc37b771028b) 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/8731a339925d9270b03a51b7c1b54e718... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mathieu-Desnoyers/rseq-x86-implement-abort-at-ip-extension/20220111-011941 git checkout 8731a339925d9270b03a51b7c1b54e718dded248 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kernel/ 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 >>): int rseq_abort_at_ip(struct pt_regs *regs, unsigned long ip) ^ arch/x86/kernel/ptrace.c:1372:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int rseq_abort_at_ip(struct pt_regs *regs, unsigned long ip) ^ static 1 warning generated. vim +/rseq_abort_at_ip +1372 arch/x86/kernel/ptrace.c 1371 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org