Hi Mark, Thank you for the patch! Yet something to improve: [auto build test ERROR on asm-generic/master] [also build test ERROR on kvmarm/next linus/master v5.5-rc7] [cannot apply to arm64/for-next/core arm-perf/for-next/perf next-20200124] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Mark-Brown/arm64-ARMv8-5-A-Branch-Target-Identification-support/20200124-203746 base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master config: arm64-allnoconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot All errors (new ones prefixed by >>): In file included from include/linux/module.h:18:0, from include/linux/kallsyms.h:13, from include/linux/ftrace.h:11, from include/linux/perf_event.h:49, from include/kvm/arm_pmu.h:10, from arch/arm64/include/asm/kvm_host.h:37, from include/linux/kvm_host.h:36, from arch/arm64/kernel/asm-offsets.c:14: >> include/linux/elf.h:79:19: error: redefinition of 'arch_parse_elf_property' static inline int arch_parse_elf_property(u32 type, const void *data, ^~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/elf.h:6:0, from include/linux/module.h:18, from include/linux/kallsyms.h:13, from include/linux/ftrace.h:11, from include/linux/perf_event.h:49, from include/kvm/arm_pmu.h:10, from arch/arm64/include/asm/kvm_host.h:37, from include/linux/kvm_host.h:36, from arch/arm64/kernel/asm-offsets.c:14: arch/arm64/include/asm/elf.h:241:19: note: previous definition of 'arch_parse_elf_property' was here static inline int arch_parse_elf_property(u32 type, const void *data, ^~~~~~~~~~~~~~~~~~~~~~~ make[2]: *** [arch/arm64/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [sub-make] Error 2 115 real 3 user 4 sys 7.44% cpu make prepare vim +/arch_parse_elf_property +79 include/linux/elf.h efb25e29b815dd Dave Martin 2020-01-22 77 efb25e29b815dd Dave Martin 2020-01-22 78 #ifndef CONFIG_ARCH_USE_GNU_PROPERTY efb25e29b815dd Dave Martin 2020-01-22 @79 static inline int arch_parse_elf_property(u32 type, const void *data, efb25e29b815dd Dave Martin 2020-01-22 80 size_t datasz, bool compat, efb25e29b815dd Dave Martin 2020-01-22 81 struct arch_elf_state *arch) efb25e29b815dd Dave Martin 2020-01-22 82 { efb25e29b815dd Dave Martin 2020-01-22 83 return 0; efb25e29b815dd Dave Martin 2020-01-22 84 } efb25e29b815dd Dave Martin 2020-01-22 85 #else efb25e29b815dd Dave Martin 2020-01-22 86 extern int arch_parse_elf_property(u32 type, const void *data, size_t datasz, efb25e29b815dd Dave Martin 2020-01-22 87 bool compat, struct arch_elf_state *arch); efb25e29b815dd Dave Martin 2020-01-22 88 #endif efb25e29b815dd Dave Martin 2020-01-22 89 :::::: The code at line 79 was first introduced by commit :::::: efb25e29b815ddf0dd1bbe3728659da08c80fa14 ELF: Add ELF program property parsing support :::::: TO: Dave Martin :::::: CC: 0day robot --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation