Hi Kuppuswamy, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on tip/x86/core] [also build test ERROR on tip/master linux/master linus/master v5.13-rc2 next-20210521] [cannot apply to luto/next] [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/Kuppuswamy-Sathyanarayanan/x86-b... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 2c88d45edbb89029c1190bb3b136d2602f057c98 config: x86_64-randconfig-a013-20210522 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e84a9b9bb3051c35dea993cdad7b3d2575638f85) 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/290ddae8f6cfa354bd4b518bfa8682347... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kuppuswamy-Sathyanarayanan/x86-boot-Add-a-trampoline-for-APs-booting-in-64-bit-mode/20210522-211940 git checkout 290ddae8f6cfa354bd4b518bfa86823478e53f5e # 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 errors (new ones prefixed by >>): In file included from arch/x86/realmode/init.c:9: if (is_tdx_guest()) ^ 1 error generated. vim +/is_tdx_guest +96 arch/x86/include/asm/realmode.h 91 92 /* Common helper function to get start IP address */ 93 static inline unsigned long get_trampoline_start_ip(struct real_mode_header *rmh) 94 { 95 #ifdef CONFIG_X86_64 97 return rmh->trampoline_start64; 98 #endif 99 return rmh->trampoline_start; 100 } 101 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org