Hi Salil, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on arm64/for-next/core] [also build test WARNING on arm/for-next soc/for-next kvmarm/next v5.8-rc3 next-20200629] [cannot apply to xlnx/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Salil-Mehta/Changes-to-Support-V... base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core config: arm64-randconfig-r033-20200630 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project cf1d04484344be52ada8178e41d18fd15a9b880c) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 >>): ^~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/sys.c:60: In file included from arch/arm64/include/asm/unistd.h:47: In file included from arch/arm64/include/uapi/asm/unistd.h:24: include/uapi/asm-generic/unistd.h:851:1: warning: initializer overrides prior initialization of this subobject __SYSCALL(__NR_clone3, sys_clone3) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:56:35: note: expanded from macro '__SYSCALL' #define __SYSCALL(nr, sym) = __arm64_##sym, ^~~~~~~~~~~~~ <scratch space>:104:1: note: expanded from here __arm64_sys_clone3 ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:59:30: note: previous initialization is here [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, ^~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/sys.c:60: In file included from arch/arm64/include/asm/unistd.h:47: In file included from arch/arm64/include/uapi/asm/unistd.h:24: include/uapi/asm-generic/unistd.h:855:1: warning: initializer overrides prior initialization of this subobject __SYSCALL(__NR_openat2, sys_openat2) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:56:35: note: expanded from macro '__SYSCALL' #define __SYSCALL(nr, sym) = __arm64_##sym, ^~~~~~~~~~~~~ <scratch space>:105:1: note: expanded from here __arm64_sys_openat2 ^~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:59:30: note: previous initialization is here [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, ^~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/sys.c:60: In file included from arch/arm64/include/asm/unistd.h:47: In file included from arch/arm64/include/uapi/asm/unistd.h:24: include/uapi/asm-generic/unistd.h:857:1: warning: initializer overrides prior initialization of this subobject __SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:56:35: note: expanded from macro '__SYSCALL' #define __SYSCALL(nr, sym) = __arm64_##sym, ^~~~~~~~~~~~~ <scratch space>:106:1: note: expanded from here __arm64_sys_pidfd_getfd ^~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:59:30: note: previous initialization is here [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, ^~~~~~~~~~~~~~~~~~~~~~ 294 warnings generated. arch/arm64/kernel/cpuinfo.c:38:26: warning: initializer overrides prior initialization of this subobject = "VIPT", ^~~~~~ arch/arm64/kernel/cpuinfo.c:37:31: note: previous initialization is here [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN", ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/cpuinfo.c:39:26: warning: initializer overrides prior initialization of this subobject = "PIPT", ^~~~~~ arch/arm64/kernel/cpuinfo.c:37:31: note: previous initialization is here [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN", ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/cpuinfo.c:40:27: warning: initializer overrides prior initialization of this subobject = "VPIPT", ^~~~~~~ arch/arm64/kernel/cpuinfo.c:37:31: note: previous initialization is here [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN", ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/cpu_errata.c:295:13: warning: no previous prototype for function 'arm64_update_smccc_conduit' void __init arm64_update_smccc_conduit(struct alt_instr ^ arch/arm64/kernel/cpu_errata.c:295:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init arm64_update_smccc_conduit(struct alt_instr ^ static arch/arm64/kernel/cpu_errata.c:317:13: warning: no previous prototype for function 'arm64_enable_wa2_handling' void __init arm64_enable_wa2_handling(struct alt_instr ^ arch/arm64/kernel/cpu_errata.c:317:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init arm64_enable_wa2_handling(struct alt_instr ^ static arch/arm64/kernel/module.c:489:20: warning: unused function '__init_plt' static inline void __init_plt(struct plt_entry unsigned long addr) ^ 5 warnings generated. 42 warnings generated. 3 warnings generated. 2 warnings generated. arch/arm64/kernel/cpuidle.c:89:5: warning: no previous prototype for function 'acpi_processor_ffh_lpi_probe' int acpi_processor_ffh_lpi_probe(unsigned int cpu) ^ arch/arm64/kernel/cpuidle.c:89:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int acpi_processor_ffh_lpi_probe(unsigned int cpu) ^ static arch/arm64/kernel/cpuidle.c:94:5: warning: no previous prototype for function 'acpi_processor_ffh_lpi_enter' int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state ^ arch/arm64/kernel/cpuidle.c:94:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state ^ static int arch_register_cpu(int num) ^ arch/arm64/kernel/smp.c:533:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arch_register_cpu(int num) ^ static arch/arm64/kernel/smp.c:937:6: warning: no previous prototype for function 'arch_irq_work_raise' void arch_irq_work_raise(void) ^ arch/arm64/kernel/smp.c:937:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void arch_irq_work_raise(void) ^ static arch/arm64/kernel/smp.c:958:6: warning: no previous prototype for function 'panic_smp_self_stop' void panic_smp_self_stop(void) ^ arch/arm64/kernel/smp.c:958:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void panic_smp_self_stop(void) ^ static 1 warning generated. 2 warnings generated. arch/arm64/kernel/cpuidle.c:38: warning: Function parameter or member 'index' not described in 'arm_cpuidle_suspend' arch/arm64/kernel/cpuidle.c:38: warning: Excess function parameter 'arg' description in 'arm_cpuidle_suspend' arch/arm64/kernel/efi.c:125:25: warning: no previous prototype for function 'efi_handle_corrupted_x18' asmlinkage efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char ^ arch/arm64/kernel/efi.c:125:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char ^ static arch/arm64/kernel/ssbd.c:90:5: warning: no previous prototype for function 'arch_prctl_spec_ctrl_set' int arch_prctl_spec_ctrl_set(struct task_struct unsigned long which, ^ arch/arm64/kernel/ssbd.c:90:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arch_prctl_spec_ctrl_set(struct task_struct unsigned long which, ^ static arch/arm64/kernel/ssbd.c:121:5: warning: no previous prototype for function 'arch_prctl_spec_ctrl_get' int arch_prctl_spec_ctrl_get(struct task_struct unsigned long which) ^ arch/arm64/kernel/ssbd.c:121:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arch_prctl_spec_ctrl_get(struct task_struct unsigned long which) ^ static arch/arm64/kernel/sys_compat.c:69:6: warning: no previous prototype for function 'compat_arm_syscall' long compat_arm_syscall(struct pt_regs int scno) ^ arch/arm64/kernel/sys_compat.c:69:1: note: declare 'static' if the function is not intended to be used outside of this translation unit long compat_arm_syscall(struct pt_regs int scno) ^ static 1 warning generated. arch/arm64/kernel/suspend.c:32:13: warning: no previous prototype for function 'cpu_suspend_set_dbg_restorer' void __init cpu_suspend_set_dbg_restorer(int int)) ^ arch/arm64/kernel/suspend.c:32:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init cpu_suspend_set_dbg_restorer(int int)) ^ static 2 warnings generated. arch/arm64/kernel/syscall.c:175:6: warning: no previous prototype for function 'do_el0_svc' warning generated. -- ^~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/sys.c:60: In file included from arch/arm64/include/asm/unistd.h:47: In file included from arch/arm64/include/uapi/asm/unistd.h:24: include/uapi/asm-generic/unistd.h:851:1: warning: initializer overrides prior initialization of this subobject __SYSCALL(__NR_clone3, sys_clone3) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:56:35: note: expanded from macro '__SYSCALL' #define __SYSCALL(nr, sym) = __arm64_##sym, ^~~~~~~~~~~~~ <scratch space>:104:1: note: expanded from here __arm64_sys_clone3 ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:59:30: note: previous initialization is here [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, ^~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/sys.c:60: In file included from arch/arm64/include/asm/unistd.h:47: In file included from arch/arm64/include/uapi/asm/unistd.h:24: include/uapi/asm-generic/unistd.h:855:1: warning: initializer overrides prior initialization of this subobject __SYSCALL(__NR_openat2, sys_openat2) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:56:35: note: expanded from macro '__SYSCALL' #define __SYSCALL(nr, sym) = __arm64_##sym, ^~~~~~~~~~~~~ <scratch space>:105:1: note: expanded from here __arm64_sys_openat2 ^~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:59:30: note: previous initialization is here [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, ^~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/kernel/sys.c:60: In file included from arch/arm64/include/asm/unistd.h:47: In file included from arch/arm64/include/uapi/asm/unistd.h:24: include/uapi/asm-generic/unistd.h:857:1: warning: initializer overrides prior initialization of this subobject __SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:56:35: note: expanded from macro '__SYSCALL' #define __SYSCALL(nr, sym) = __arm64_##sym, ^~~~~~~~~~~~~ <scratch space>:106:1: note: expanded from here __arm64_sys_pidfd_getfd ^~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kernel/sys.c:59:30: note: previous initialization is here [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, ^~~~~~~~~~~~~~~~~~~~~~ 294 warnings generated. arch/arm64/kernel/cpuinfo.c:38:26: warning: initializer overrides prior initialization of this subobject = "VIPT", ^~~~~~ arch/arm64/kernel/cpuinfo.c:37:31: note: previous initialization is here [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN", ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/cpuinfo.c:39:26: warning: initializer overrides prior initialization of this subobject = "PIPT", ^~~~~~ arch/arm64/kernel/cpuinfo.c:37:31: note: previous initialization is here [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN", ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/cpuinfo.c:40:27: warning: initializer overrides prior initialization of this subobject = "VPIPT", ^~~~~~~ arch/arm64/kernel/cpuinfo.c:37:31: note: previous initialization is here [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN", ^~~~~~~~~~~~~~~~~~ arch/arm64/kernel/cpu_errata.c:295:13: warning: no previous prototype for function 'arm64_update_smccc_conduit' void __init arm64_update_smccc_conduit(struct alt_instr ^ arch/arm64/kernel/cpu_errata.c:295:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init arm64_update_smccc_conduit(struct alt_instr ^ static arch/arm64/kernel/cpu_errata.c:317:13: warning: no previous prototype for function 'arm64_enable_wa2_handling' void __init arm64_enable_wa2_handling(struct alt_instr ^ arch/arm64/kernel/cpu_errata.c:317:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init arm64_enable_wa2_handling(struct alt_instr ^ static arch/arm64/kernel/module.c:489:20: warning: unused function '__init_plt' static inline void __init_plt(struct plt_entry unsigned long addr) ^ 5 warnings generated. 42 warnings generated. 3 warnings generated. 2 warnings generated. arch/arm64/kernel/cpuidle.c:89:5: warning: no previous prototype for function 'acpi_processor_ffh_lpi_probe' int acpi_processor_ffh_lpi_probe(unsigned int cpu) ^ arch/arm64/kernel/cpuidle.c:89:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int acpi_processor_ffh_lpi_probe(unsigned int cpu) ^ static arch/arm64/kernel/cpuidle.c:94:5: warning: no previous prototype for function 'acpi_processor_ffh_lpi_enter' int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state ^ arch/arm64/kernel/cpuidle.c:94:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state ^ static int arch_register_cpu(int num) ^ arch/arm64/kernel/smp.c:533:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arch_register_cpu(int num) ^ static arch/arm64/kernel/smp.c:937:6: warning: no previous prototype for function 'arch_irq_work_raise' void arch_irq_work_raise(void) ^ arch/arm64/kernel/smp.c:937:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void arch_irq_work_raise(void) ^ static arch/arm64/kernel/smp.c:958:6: warning: no previous prototype for function 'panic_smp_self_stop' void panic_smp_self_stop(void) ^ arch/arm64/kernel/smp.c:958:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void panic_smp_self_stop(void) ^ static 1 warning generated. 2 warnings generated. arch/arm64/kernel/cpuidle.c:38: warning: Function parameter or member 'index' not described in 'arm_cpuidle_suspend' arch/arm64/kernel/cpuidle.c:38: warning: Excess function parameter 'arg' description in 'arm_cpuidle_suspend' arch/arm64/kernel/efi.c:125:25: warning: no previous prototype for function 'efi_handle_corrupted_x18' asmlinkage efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char ^ arch/arm64/kernel/efi.c:125:12: note: declare 'static' if the function is not intended to be used outside of this translation unit asmlinkage efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char ^ static arch/arm64/kernel/ssbd.c:90:5: warning: no previous prototype for function 'arch_prctl_spec_ctrl_set' int arch_prctl_spec_ctrl_set(struct task_struct unsigned long which, ^ arch/arm64/kernel/ssbd.c:90:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arch_prctl_spec_ctrl_set(struct task_struct unsigned long which, ^ static arch/arm64/kernel/ssbd.c:121:5: warning: no previous prototype for function 'arch_prctl_spec_ctrl_get' int arch_prctl_spec_ctrl_get(struct task_struct unsigned long which) ^ arch/arm64/kernel/ssbd.c:121:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arch_prctl_spec_ctrl_get(struct task_struct unsigned long which) ^ static arch/arm64/kernel/sys_compat.c:69:6: warning: no previous prototype for function 'compat_arm_syscall' long compat_arm_syscall(struct pt_regs int scno) ^ arch/arm64/kernel/sys_compat.c:69:1: note: declare 'static' if the function is not intended to be used outside of this translation unit long compat_arm_syscall(struct pt_regs int scno) ^ static 1 warning generated. arch/arm64/kernel/suspend.c:32:13: warning: no previous prototype for function 'cpu_suspend_set_dbg_restorer' void __init cpu_suspend_set_dbg_restorer(int int)) ^ arch/arm64/kernel/suspend.c:32:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init cpu_suspend_set_dbg_restorer(int int)) ^ static 2 warnings generated. arch/arm64/kernel/syscall.c:175:6: warning: no previous prototype for function 'do_el0_svc' warning generated. .. vim +/arch_register_cpu +533 arch/arm64/kernel/smp.c 531 532 #ifdef CONFIG_ACPI_HOTPLUG_CPU 534 { 535 return 0; 536 } 537 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org