Hi Parth, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on powerpc/next] [also build test ERROR on v5.14-rc1 next-20210712] [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/Parth-Shah/Paravirtualize-idle-C... base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: arm64-buildonly-randconfig-r003-20210713 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/c14c77422fea64356bf506d760f11d230... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Parth-Shah/Paravirtualize-idle-CPU-wakeup-optimization/20210713-132728 git checkout c14c77422fea64356bf506d760f11d2308201912 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash kernel/sched/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): #include <asm/idle_hint.h> ^~~~~~~~~~~~~~~~~ 1 error generated. vim +10 kernel/sched/idle.c 11 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org