tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: 5a3ba2f90f8789162a03e07a37224bab4c643d1d commit: 57ac40ee09cea2ec90f71c6f49b15d0d82667b38 [2397/4040] powerpc: Drop -me200 addition to build flags config: powerpc-randconfig-r004-20210810 (attached as .config) compiler: powerpc-linux-gcc (GCC) 10.3.0 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/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.19.y git checkout 57ac40ee09cea2ec90f71c6f49b15d0d82667b38 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=powerpc 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 >>): 1341 | int is_valid_bugaddr(unsigned long addr) | ^~~~~~~~~~~~~~~~ arch/powerpc/kernel/traps.c:1880:6: error: no previous prototype for 'DebugException' [-Werror=missing-prototypes] 1880 | void DebugException(struct pt_regs *regs, unsigned long debug_status) | ^~~~~~~~~~~~~~ arch/powerpc/kernel/traps.c:1993:6: error: no previous prototype for 'CacheLockingException' [-Werror=missing-prototypes] 1993 | void CacheLockingException(struct pt_regs *regs, unsigned long address, | ^~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- arch/powerpc/kernel/smp.c:445:5: error: no previous prototype for '__smp_send_nmi_ipi' [-Werror=missing-prototypes] 445 | int __smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us, bool safe) | ^~~~~~~~~~~~~~~~~~ arch/powerpc/kernel/smp.c:521:6: error: no previous prototype for 'tick_broadcast' [-Werror=missing-prototypes] 521 | void tick_broadcast(const struct cpumask *mask) | ^~~~~~~~~~~~~~ 531 | void debugger_ipi_callback(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- 70 | unsigned long tlbcam_sz(int idx) | ^~~~~~~~~ cc1: all warnings being treated as errors -- In file included from arch/powerpc/xmon/xmon.c:67: arch/powerpc/xmon/dis-asm.h: In function 'print_insn_powerpc': arch/powerpc/xmon/dis-asm.h:20:13: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Werror=format=] 20 | printf("%.8x", insn); | ~~~^ ~~~~ | | | | | long unsigned int | unsigned int | %.8lx arch/powerpc/xmon/dis-asm.h: In function 'print_insn_spu': arch/powerpc/xmon/dis-asm.h:26:13: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Werror=format=] 26 | printf("%.8x", insn); | ~~~^ ~~~~ | | | | | long unsigned int | unsigned int | %.8lx arch/powerpc/xmon/xmon.c: In function 'xmon_print_symbol': 3425 | const char *name = NULL; | ^~~~ arch/powerpc/xmon/xmon.c: In function 'show_tasks': 3107 | struct task_struct *tsk = NULL; | ^~~ arch/powerpc/xmon/xmon.c: In function 'xmon_core': 800 | struct bpt *bp; | ^~ >> arch/powerpc/xmon/xmon.c:454:48: error: argument 'fromipi' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] 454 | static int xmon_core(struct pt_regs *regs, int fromipi) | ~~~~^~~~~~~ cc1: all warnings being treated as errors Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for HOTPLUG_CPU Depends on SMP && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE Selected by - PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE && PM_SLEEP WARNING: unmet direct dependencies detected for FSL_EMB_PERFMON Depends on E500 || PPC_83xx Selected by - PPC_FSL_BOOK3E vim +/is_valid_bugaddr +1341 arch/powerpc/kernel/traps.c 14cf11af6cf608 Paul Mackerras 2005-09-26 1340 73c9ceab40b126 Jeremy Fitzhardinge 2006-12-08 @1341 int is_valid_bugaddr(unsigned long addr) 14cf11af6cf608 Paul Mackerras 2005-09-26 1342 { 73c9ceab40b126 Jeremy Fitzhardinge 2006-12-08 1343 return is_kernel_addr(addr); 14cf11af6cf608 Paul Mackerras 2005-09-26 1344 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1345 :::::: The code at line 1341 was first introduced by commit :::::: 73c9ceab40b1269d6195e556773167c078ac8311 [POWERPC] Generic BUG for powerpc :::::: TO: Jeremy Fitzhardinge <jeremy(a)goop.org&gt; :::::: CC: Paul Mackerras <paulus(a)samba.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org