Hi Frederic, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on tip/sched/core] [also build test WARNING on tip/core/entry linus/master v5.11-rc4 next-20210118] [cannot apply to tip/x86/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] url: https://github.com/0day-ci/linux/commits/Frederic-Weisbecker/static_call-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 65bcf072e20ed7597caa902f170f293662b0af3c config: x86_64-randconfig-r006-20210118 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 95d146182fdf2315e74943b93fb3bb0cbafc5d89) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/56103459734b6ee3e431c9907b11e0008... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Frederic-Weisbecker/static_call-x86-Add-__static_call_return0/20210118-231312 git checkout 56103459734b6ee3e431c9907b11e0008319ae34 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): -- -- --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org