tree: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git kvm-trng head: ce24e6d7812bdc252275c33141fef8d8ec065b9c commit: f42414d8473654a886b604ec9b7ba2ae7f7861e0 [63/72] KVM: arm64: Use BUG and BUG_ON in nVHE hyp config: arm64-allyesconfig (attached as .config) compiler: aarch64-linux-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/ardb/linux.git/commit/?id... git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git git fetch --no-tags ardb kvm-trng git checkout f42414d8473654a886b604ec9b7ba2ae7f7861e0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 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 >>): 217 | void __noreturn hyp_panic(void) | ^~~~~~~~~ arch/arm64/kvm/hyp/vhe/switch.c:227:17: warning: no previous prototype for 'kvm_unexpected_el2_exception' [-Wmissing-prototypes] 227 | asmlinkage void kvm_unexpected_el2_exception(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- 264 | void __noreturn hyp_panic(void) | ^~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:286:17: warning: no previous prototype for 'kvm_unexpected_el2_exception' [-Wmissing-prototypes] 286 | asmlinkage void kvm_unexpected_el2_exception(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/hyp_panic +217 arch/arm64/kvm/hyp/vhe/switch.c 09cf57eba30424 David Brazdil 2020-06-25 216 6a0259ed29bba8 Andrew Scull 2020-09-15 @217 void __noreturn hyp_panic(void) 09cf57eba30424 David Brazdil 2020-06-25 218 { 09cf57eba30424 David Brazdil 2020-06-25 219 u64 spsr = read_sysreg_el2(SYS_SPSR); 09cf57eba30424 David Brazdil 2020-06-25 220 u64 elr = read_sysreg_el2(SYS_ELR); 96d389ca10110d Rob Herring 2020-10-28 221 u64 par = read_sysreg_par(); 09cf57eba30424 David Brazdil 2020-06-25 222 6a0259ed29bba8 Andrew Scull 2020-09-15 223 __hyp_call_panic(spsr, elr, par); 09cf57eba30424 David Brazdil 2020-06-25 224 unreachable(); 09cf57eba30424 David Brazdil 2020-06-25 225 } e9ee186bb735bf James Morse 2020-08-21 226 :::::: The code at line 217 was first introduced by commit :::::: 6a0259ed29bba83653a36fabcdf6b06aecd78596 KVM: arm64: Remove hyp_panic arguments :::::: TO: Andrew Scull <ascull(a)google.com&gt; :::::: CC: Marc Zyngier <maz(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org