tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.19 head: 521b1c0f0533d30a90e816aef3c6ab3e3d2da5ff commit: 24c661f203ea6f3af0495effbff3311408e225aa [81/85] ARM: 8991/1: use VFP assembler mnemonics if available config: arm-axm55xx_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-4.19 git checkout 24c661f203ea6f3af0495effbff3311408e225aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 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 >>): arch/arm/kvm/hyp/switch.c:226:28: warning: no previous prototype for '__hyp_panic' [-Wmissing-prototypes] 226 | void __hyp_text __noreturn __hyp_panic(int cause) | ^~~~~~~~~~~ /tmp/ccfhJxi3.s: Assembler messages: --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org