On Tue, Dec 16, 2025 at 04:27:55AM +0800, kernel test robot wrote:
> Hi Mukesh,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on powerpc/next]
> [also build test ERROR on powerpc/fixes linus/master v6.19-rc1 next-20251215]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:
> https://github.com/intel-lab-lkp/linux/commits/Mukesh-Kumar-Chaurasiya/powerpc-rename-arch_irq_disabled_regs/20251214-210813
> base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> patch link:
> https://lore.kernel.org/r/20251214130245.43664-9-mkchauras%40linux.ibm.com
> patch subject: [PATCH v2 8/8] powerpc: Enable Generic Entry/Exit for syscalls.
> config: powerpc-randconfig-001-20251215
> (https://download.01.org/0day-ci/archive/20251216/[email protected]/config)
> compiler: powerpc-linux-gcc (GCC) 9.5.0
> reproduce (this is a W=1 build):
> (https://download.01.org/0day-ci/archive/20251216/[email protected]/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version
> of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <[email protected]>
> | Closes:
> https://lore.kernel.org/oe-kbuild-all/[email protected]/
>
I tried this with gcc 9.4 and gcc 14. I am not able to reproduce this.
Will investigate further, meanwhile if anyone has any ideas that can help it
would be great.
Regards,
Mukesh
> All errors (new ones prefixed by >>):
>
> powerpc-linux-ld: init/main.o: in function
> `do_trace_event_raw_event_initcall_level':
> include/trace/events/initcall.h:10: undefined reference to `memcpy'
> powerpc-linux-ld: init/main.o: in function `repair_env_string':
> init/main.c:512: undefined reference to `memmove'
> powerpc-linux-ld: init/do_mounts.o: in function `do_mount_root':
> init/do_mounts.c:162: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/process.o: in function
> `start_thread':
> arch/powerpc/kernel/process.c:1919: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/process.o: in function
> `__set_breakpoint':
> arch/powerpc/kernel/process.c:880: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/process.o: in function
> `arch_dup_task_struct':
> arch/powerpc/kernel/process.c:1724: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/process.o: in function `copy_thread':
> arch/powerpc/kernel/process.c:1801: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/process.c:1812: undefined reference
> to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/signal.o: in function `do_signal':
> arch/powerpc/kernel/signal.c:247: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/time.o: in function
> `register_decrementer_clockevent':
> >> arch/powerpc/kernel/time.c:834: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/time.o: in function
> `platform_device_register_resndata':
> >> include/linux/platform_device.h:158: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/prom.o: in function
> `move_device_tree':
> >> arch/powerpc/kernel/prom.c:134: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/setup-common.o: in function
> `probe_machine':
> >> arch/powerpc/kernel/setup-common.c:646: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.o: in function
> `user_regset_copyin':
> >> include/linux/regset.h:276: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.o: in function
> `membuf_write':
> include/linux/regset.h:42: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.o: in function
> `gpr_get':
> >> arch/powerpc/kernel/ptrace/ptrace-view.c:230: undefined reference to
> >> `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.o: in function
> `membuf_zero':
> >> include/linux/regset.h:30: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.o: in function
> `gpr32_get_common':
> arch/powerpc/kernel/ptrace/ptrace-view.c:707: undefined reference to
> `memcpy'
> >> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.c:708: undefined
> >> reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.c:710: undefined
> reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-view.o: in function
> `membuf_zero':
> >> include/linux/regset.h:30: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/ptrace/ptrace-novsx.o: in function
> `membuf_write':
> include/linux/regset.h:42: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/optprobes.o: in function
> `can_optimize':
> >> arch/powerpc/kernel/optprobes.c:71: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/kvm.o: in function
> `kvm_map_magic_page':
> >> arch/powerpc/kernel/kvm.c:407: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/kernel/kvm.o: in function
> `kvm_patch_ins_mtmsrd':
> >> arch/powerpc/kernel/kvm.c:178: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/kvm.o: in function
> `kvm_patch_ins_mtmsr':
> arch/powerpc/kernel/kvm.c:231: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/kernel/kvm.o: in function
> `epapr_hypercall0_1':
> >> arch/powerpc/include/asm/epapr_hcalls.h:511: undefined reference to
> >> `memset'
> powerpc-linux-ld: arch/powerpc/mm/mem.o: in function `execmem_arch_setup':
> >> arch/powerpc/mm/mem.c:423: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/mm/init-common.o: in function `ctor_15':
> >> arch/powerpc/mm/init-common.c:81: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/mm/init-common.o: in function `ctor_14':
> >> arch/powerpc/mm/init-common.c:81: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/mm/init-common.o: in function `ctor_13':
> >> arch/powerpc/mm/init-common.c:81: undefined reference to `memset'
> powerpc-linux-ld:
> arch/powerpc/mm/init-common.o:arch/powerpc/mm/init-common.c:81: more
> undefined references to `memset' follow
> powerpc-linux-ld: arch/powerpc/lib/pmem.o: in function `memcpy_flushcache':
> >> arch/powerpc/lib/pmem.c:84: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/sysdev/fsl_mpic_err.o: in function
> `mpic_setup_error_int':
> >> arch/powerpc/sysdev/fsl_mpic_err.c:70: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/platforms/8xx/pic.o: in function
> `irq_domain_create_linear':
> >> include/linux/irqdomain.h:405: undefined reference to `memset'
> powerpc-linux-ld: arch/powerpc/platforms/8xx/cpm1.o: in function
> `cpm1_clk_setup':
> arch/powerpc/platforms/8xx/cpm1.c:251: undefined reference to `memcpy'
> powerpc-linux-ld: arch/powerpc/platforms/8xx/cpm1-ic.o: in function
> `irq_domain_create_linear':
> include/linux/irqdomain.h:405: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function
> `do_trace_event_raw_event_task_newtask':
> include/trace/events/task.h:9: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function
> `do_trace_event_raw_event_task_rename':
> include/trace/events/task.h:34: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function `copy_struct_from_user':
> include/linux/uaccess.h:396: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `copy_clone_args_from_user':
> kernel/fork.c:2800: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `mm_init':
> kernel/fork.c:1044: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `bitmap_zero':
> include/linux/bitmap.h:238: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `pgd_alloc':
> arch/powerpc/include/asm/nohash/pgalloc.h:26: undefined reference to
> `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function `__kmem_cache_create':
> include/linux/slab.h:379: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `arch_dup_task_struct':
> kernel/fork.c:854: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function `mm_alloc':
> kernel/fork.c:1120: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `replace_mm_exe_file':
> kernel/fork.c:1238: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `copy_process':
> kernel/fork.c:2030: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `posix_cputimers_init':
> include/linux/posix-timers.h:103: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `copy_sighand':
> kernel/fork.c:1618: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function `copy_signal':
> kernel/fork.c:1687: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function `dup_mm':
> kernel/fork.c:1483: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/fork.o: in function `create_io_thread':
> kernel/fork.c:2549: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `kernel_thread':
> kernel/fork.c:2661: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `user_mode_thread':
> kernel/fork.c:2678: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `sys_fork':
> kernel/fork.c:2692: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o: in function `sys_vfork':
> kernel/fork.c:2707: undefined reference to `memset'
> powerpc-linux-ld: kernel/fork.o:kernel/fork.c:2740: more undefined
> references to `memset' follow
> powerpc-linux-ld: kernel/softirq.o: in function
> `do_trace_event_raw_event_irq_handler_entry':
> include/trace/events/irq.h:53: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/resource.o: in function `find_next_iomem_res':
> kernel/resource.c:372: undefined reference to `memset'
> powerpc-linux-ld: kernel/resource.o: in function `__request_region_locked':
> kernel/resource.c:1261: undefined reference to `memset'
> powerpc-linux-ld: kernel/resource.o: in function `reserve_setup':
> kernel/resource.c:1757: undefined reference to `memset'
> powerpc-linux-ld: kernel/resource.c:1760: undefined reference to `memset'
> powerpc-linux-ld: kernel/sysctl.o: in function `proc_put_long':
> kernel/sysctl.c:339: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/sysctl.o: in function `_proc_do_string':
> kernel/sysctl.c:127: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/sysctl.o: in function `proc_get_long':
> kernel/sysctl.c:284: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/sysctl.o: in function `bitmap_copy':
> include/linux/bitmap.h:259: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/sysctl.o: in function `proc_do_static_key':
> kernel/sysctl.c:1433: undefined reference to `memset'
> powerpc-linux-ld: kernel/capability.o: in function `__do_sys_capset':
> kernel/capability.c:218: undefined reference to `memset'
> powerpc-linux-ld: kernel/ptrace.o: in function `syscall_set_arguments':
> arch/powerpc/include/asm/syscall.h:127: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/ptrace.o: in function `ptrace_get_syscall_info':
> kernel/ptrace.c:998: undefined reference to `memset'
> powerpc-linux-ld: kernel/ptrace.o: in function `copy_siginfo':
> include/linux/signal.h:18: undefined reference to `memcpy'
> powerpc-linux-ld: include/linux/signal.h:18: undefined reference to
> `memcpy'
> powerpc-linux-ld: include/linux/signal.h:18: undefined reference to
> `memcpy'
> powerpc-linux-ld: kernel/user.o: in function `ratelimit_state_init':
> include/linux/ratelimit.h:12: undefined reference to `memset'
> powerpc-linux-ld: kernel/user.o: in function `__kmem_cache_create':
> include/linux/slab.h:379: undefined reference to `memset'
> powerpc-linux-ld: kernel/signal.o: in function
> `do_trace_event_raw_event_signal_generate':
> include/trace/events/signal.h:50: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/signal.o: in function `clear_siginfo':
> include/linux/signal.h:23: undefined reference to `memset'
> powerpc-linux-ld: kernel/signal.o: in function `copy_siginfo':
> include/linux/signal.h:18: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/signal.o: in function `do_sigaltstack':
> kernel/signal.c:4396: undefined reference to `memset'
> powerpc-linux-ld: kernel/signal.o: in function `copy_siginfo':
> include/linux/signal.h:18: undefined reference to `memcpy'
> powerpc-linux-ld: include/linux/signal.h:18: undefined reference to
> `memcpy'
> powerpc-linux-ld: kernel/signal.o: in function `signals_init':
> kernel/signal.c:5011: undefined reference to `memset'
> powerpc-linux-ld: kernel/sys.o: in function `override_release':
> kernel/sys.c:1331: undefined reference to `memset'
> powerpc-linux-ld: kernel/sys.o: in function `__do_sys_newuname':
> kernel/sys.c:1356: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/sys.o: in function `__do_sys_uname':
> kernel/sys.c:1380: undefined reference to `memcpy'
> powerpc-linux-ld: kernel/sys.o: in function `prctl_set_auxv':
>
>
> vim +18 include/linux/signal.h
>
> ^1da177e4c3f415 Linus Torvalds 2005-04-16 14
> ae7795bc6187a15 Eric W. Biederman 2018-09-25 15 static inline void
> copy_siginfo(kernel_siginfo_t *to,
> ae7795bc6187a15 Eric W. Biederman 2018-09-25 16
> const kernel_siginfo_t *from)
> ca9eb49aa9562ea James Hogan 2016-02-08 17 {
> ca9eb49aa9562ea James Hogan 2016-02-08 @18 memcpy(to, from,
> sizeof(*to));
> ca9eb49aa9562ea James Hogan 2016-02-08 19 }
> ca9eb49aa9562ea James Hogan 2016-02-08 20
> ae7795bc6187a15 Eric W. Biederman 2018-09-25 21 static inline void
> clear_siginfo(kernel_siginfo_t *info)
> 8c5dbf2ae00bb86 Eric W. Biederman 2017-07-24 22 {
> 8c5dbf2ae00bb86 Eric W. Biederman 2017-07-24 @23 memset(info, 0,
> sizeof(*info));
> 8c5dbf2ae00bb86 Eric W. Biederman 2017-07-24 24 }
> 8c5dbf2ae00bb86 Eric W. Biederman 2017-07-24 25
> 4ce5f9c9e754691 Eric W. Biederman 2018-09-25 26 #define SI_EXPANSION_SIZE
> (sizeof(struct siginfo) - sizeof(struct kernel_siginfo))
> 4ce5f9c9e754691 Eric W. Biederman 2018-09-25 27
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 28 static inline void
> copy_siginfo_to_external(siginfo_t *to,
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 29
> const kernel_siginfo_t *from)
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 30 {
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 @31 memcpy(to, from,
> sizeof(*from));
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 @32 memset(((char *)to) +
> sizeof(struct kernel_siginfo), 0,
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 33
> SI_EXPANSION_SIZE);
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 34 }
> fa4751f454e6b51 Eric W. Biederman 2020-05-05 35
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
