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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/Heiko-Carstens/s390-jump_label-Serialize-text-patching-with-text_mutex/20261026-130326 base: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features patch link: https://lore.kernel.org/r/20261026120329.1792436-5-hca%40linux.ibm.com patch subject: [PATCH 4/4] s390/maccess: Remove spinlock from __s390_kernel_write() config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20261027/202610271725.YBK6zlkf-lkp@intel.com/config) compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 186e70f4e6a1521991d2340d3d49b23b1beff11f) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261027/202610271725.YBK6zlkf-lkp@intel.com/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 | Closes: https://lore.kernel.org/oe-kbuild-all/202610271725.YBK6zlkf-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from arch/s390/mm/maccess.c:9: >> include/linux/text-patching.h:10:9: error: call to undeclared library function 'memcpy' with type 'void *(void *, const void *, __size_t)' (aka 'void *(void *, const void *, unsigned long)'); ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 10 | return memcpy(dst, src, len); | ^ include/linux/text-patching.h:10:9: note: include the header or explicitly provide a declaration for 'memcpy' In file included from arch/s390/mm/maccess.c:15: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: In file included from include/linux/device.h:32: In file included from include/linux/device/driver.h:21: In file included from include/linux/module.h:20: In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:173: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:36: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:7: include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 98 | return (set->sig[3] | set->sig[2] | | ^ ~ arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here 22 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from arch/s390/mm/maccess.c:15: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: In file included from include/linux/device.h:32: In file included from include/linux/device/driver.h:21: In file included from include/linux/module.h:20: In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:173: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:36: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:7: include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 98 | return (set->sig[3] | set->sig[2] | | ^ ~ arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here 22 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from arch/s390/mm/maccess.c:15: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: In file included from include/linux/device.h:32: In file included from include/linux/device/driver.h:21: In file included from include/linux/module.h:20: In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:173: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:36: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:7: include/linux/signal.h:99:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 99 | set->sig[1] | set->sig[0]) == 0; | ^ ~ arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here 22 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from arch/s390/mm/maccess.c:15: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: In file included from include/linux/device.h:32: In file included from include/linux/device/driver.h:21: In file included from include/linux/module.h:20: In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:173: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:36: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:7: include/linux/signal.h:101:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 101 | return (set->sig[1] | set->sig[0]) == 0; | ^ ~ arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here 22 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from arch/s390/mm/maccess.c:15: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: In file included from include/linux/device.h:32: In file included from include/linux/device/driver.h:21: In file included from include/linux/module.h:20: In file included from include/linux/elf.h:6: In file included from arch/s390/include/asm/elf.h:173: In file included from arch/s390/include/asm/mmu_context.h:11: In file included from arch/s390/include/asm/pgalloc.h:18: In file included from include/linux/mm.h:36: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:7: include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds] 114 | return (set1->sig[3] == set2->sig[3]) && | ^ ~ arch/s390/include/asm/signal.h:22:9: note: array 'sig' declared here 22 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from arch/s390/mm/maccess.c:15: In file included from include/linux/cpu.h:17: vim +10 include/linux/text-patching.h 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 6) 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 7) #ifndef text_poke_copy 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 8) static inline void *text_poke_copy(void *dst, const void *src, size_t len) 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 9) { 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 @10) return memcpy(dst, src, len); 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 11) } 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 12) #define text_poke_copy text_poke_copy 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 13) #endif 0c3beacf681ec8 Mike Rapoport (Microsoft 2024-10-23 14) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki