tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-4.4 head: b5141ab6800224d501d7bcea7bdb76f3f25a1b42 commit: 67e0dc920b107be69b59370758e964120fb3aa49 [35/42] ARCv2: save ABI registers across signal handling config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 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/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable pending-4.4 git checkout 67e0dc920b107be69b59370758e964120fb3aa49 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from include/asm-generic/preempt.h:4, from arch/arc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/uapi/linux/timex.h:56, from include/linux/timex.h:56, from include/linux/sched.h:19, from arch/arc/kernel/asm-offsets.c:9: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' 112 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/asm-generic/signal.h:10, from arch/arc/include/uapi/asm/signal.h:25, from include/uapi/linux/signal.h:4, from include/linux/signal.h:6, from include/linux/sched.h:37, from arch/arc/kernel/asm-offsets.c:9: arch/arc/include/uapi/asm/sigcontext.h: At top level: 20 | struct user_regs_arcv2 v2abi; | ^~~~~ -- In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/seq_file.h:6, from arch/arc/kernel/setup.c:9: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' 112 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/asm-generic/signal.h:10, from arch/arc/include/uapi/asm/signal.h:25, from include/uapi/linux/signal.h:4, from include/linux/signal.h:6, from include/linux/sched.h:37, from include/linux/uaccess.h:4, from include/linux/highmem.h:8, from include/linux/pagemap.h:10, from arch/arc/include/asm/tlb.h:44, from arch/arc/kernel/setup.c:23: arch/arc/include/uapi/asm/sigcontext.h: At top level: 20 | struct user_regs_arcv2 v2abi; | ^~~~~ In file included from include/uapi/linux/stddef.h:1, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/seq_file.h:4, from arch/arc/kernel/setup.c:9: include/linux/highmem.h: In function 'kmap_atomic_idx_push': include/linux/highmem.h:97:13: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare] 97 | BUG_ON(idx >= KM_TYPE_NR); | ^~ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/highmem.h:97:2: note: in expansion of macro 'BUG_ON' 97 | BUG_ON(idx >= KM_TYPE_NR); | ^~~~~~ In file included from arch/arc/include/asm/tlb.h:44, from arch/arc/kernel/setup.c:23: include/linux/pagemap.h: In function 'fault_in_multipages_readable': include/linux/pagemap.h:632:16: warning: variable 'c' set but not used [-Wunused-but-set-variable] 632 | volatile char c; | ^ In file included from include/linux/writeback.h:192, from include/linux/memcontrol.h:30, from include/linux/swap.h:8, from include/asm-generic/tlb.h:18, from arch/arc/include/asm/tlb.h:45, from arch/arc/kernel/setup.c:23: include/linux/bio.h: In function 'bio_next_split': include/linux/bio.h:424:14: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 424 | if (sectors >= bio_sectors(bio)) | ^~ -- In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from include/asm-generic/preempt.h:4, from arch/arc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/interrupt.h:8, from arch/arc/kernel/irq.c:10: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' 112 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/asm-generic/signal.h:10, from arch/arc/include/uapi/asm/signal.h:25, from include/uapi/linux/signal.h:4, from include/linux/signal.h:6, from include/linux/sched.h:37, from include/acpi/platform/aclinux.h:79, from include/acpi/platform/acenv.h:174, from include/acpi/acpi.h:56, from include/linux/acpi.h:33, from include/linux/irqchip.h:14, from arch/arc/kernel/irq.c:11: arch/arc/include/uapi/asm/sigcontext.h: At top level: 20 | struct user_regs_arcv2 v2abi; | ^~~~~ arch/arc/kernel/irq.c:21:13: warning: no previous prototype for 'init_IRQ' [-Wmissing-prototypes] 21 | void __init init_IRQ(void) | ^~~~~~~~ arch/arc/kernel/irq.c:44:6: warning: no previous prototype for 'arch_do_IRQ' [-Wmissing-prototypes] 44 | void arch_do_IRQ(unsigned int irq, struct pt_regs *regs) | ^~~~~~~~~~~ -- In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from include/asm-generic/preempt.h:4, from arch/arc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from arch/arc/kernel/time.c:32: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' 112 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/asm-generic/signal.h:10, from arch/arc/include/uapi/asm/signal.h:25, from include/uapi/linux/signal.h:4, from include/linux/signal.h:6, from include/linux/sched.h:37, from arch/arc/kernel/time.c:35: arch/arc/include/uapi/asm/sigcontext.h: At top level: 20 | struct user_regs_arcv2 v2abi; | ^~~~~ In file included from arch/arc/kernel/time.c:41: include/linux/clocksource.h:113:77: warning: operand of ?: changes signedness from 'int' to 'long long unsigned int' due to unsignedness of other operand [-Wsign-compare] 113 | #define CLOCKSOURCE_MASK(bits) (cycle_t)((bits) < 64 ? ((1ULL<<(bits))-1) : -1) | ^~ arch/arc/kernel/time.c:101:12: note: in expansion of macro 'CLOCKSOURCE_MASK' 101 | .mask = CLOCKSOURCE_MASK(64), | ^~~~~~~~~~~~~~~~ arch/arc/kernel/time.c: In function 'arc_local_timer_setup': arch/arc/kernel/time.c:253:6: warning: old-style function definition [-Wold-style-definition] 253 | void arc_local_timer_setup() | ^~~~~~~~~~~~~~~~~~~~~ arch/arc/kernel/time.c: At top level: arch/arc/kernel/time.c:276:13: warning: no previous prototype for 'time_init' [-Wmissing-prototypes] 276 | void __init time_init(void) | ^~~~~~~~~ -- In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from include/asm-generic/preempt.h:4, from arch/arc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/uapi/linux/timex.h:56, from include/linux/timex.h:56, from include/linux/sched.h:19, from include/linux/ptrace.h:5, from arch/arc/kernel/ptrace.c:9: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' 112 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/asm-generic/signal.h:10, from arch/arc/include/uapi/asm/signal.h:25, from include/uapi/linux/signal.h:4, from include/linux/signal.h:6, from include/linux/sched.h:37, from include/linux/ptrace.h:5, from arch/arc/kernel/ptrace.c:9: arch/arc/include/uapi/asm/sigcontext.h: At top level: 20 | struct user_regs_arcv2 v2abi; | ^~~~~ In file included from include/linux/ptrace.h:4, from arch/arc/kernel/ptrace.c:9: include/linux/highmem.h: In function 'kmap_atomic_idx_push': include/linux/highmem.h:97:13: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare] 97 | BUG_ON(idx >= KM_TYPE_NR); | ^~ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/highmem.h:97:2: note: in expansion of macro 'BUG_ON' 97 | BUG_ON(idx >= KM_TYPE_NR); | ^~~~~~ In file included from include/linux/writeback.h:192, from include/linux/memcontrol.h:30, from include/linux/tracehook.h:53, from arch/arc/kernel/ptrace.c:10: include/linux/bio.h: In function 'bio_next_split': include/linux/bio.h:424:14: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 424 | if (sectors >= bio_sectors(bio)) | ^~ In file included from include/linux/ptrace.h:4, from arch/arc/kernel/ptrace.c:9: include/linux/regset.h: In function 'user_regset_copyout': include/linux/regset.h:227:14: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 227 | BUG_ON(*pos < start_pos); | ^ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/regset.h:227:2: note: in expansion of macro 'BUG_ON' 227 | BUG_ON(*pos < start_pos); | ^~~~~~ In file included from arch/arc/kernel/ptrace.c:11: include/linux/regset.h:228:26: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 228 | if (end_pos < 0 || *pos < end_pos) { | ^ In file included from include/linux/ptrace.h:4, from arch/arc/kernel/ptrace.c:9: include/linux/regset.h: In function 'user_regset_copyin': include/linux/regset.h:252:14: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 252 | BUG_ON(*pos < start_pos); | ^ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/regset.h:252:2: note: in expansion of macro 'BUG_ON' 252 | BUG_ON(*pos < start_pos); | ^~~~~~ In file included from arch/arc/kernel/ptrace.c:11: include/linux/regset.h:253:26: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 253 | if (end_pos < 0 || *pos < end_pos) { | ^ In file included from include/linux/ptrace.h:4, from arch/arc/kernel/ptrace.c:9: include/linux/regset.h: In function 'user_regset_copyout_zero': include/linux/regset.h:282:14: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 282 | BUG_ON(*pos < start_pos); | ^ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/regset.h:282:2: note: in expansion of macro 'BUG_ON' 282 | BUG_ON(*pos < start_pos); | ^~~~~~ In file included from arch/arc/kernel/ptrace.c:11: include/linux/regset.h:283:26: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 283 | if (end_pos < 0 || *pos < end_pos) { | ^ In file included from include/linux/ptrace.h:4, from arch/arc/kernel/ptrace.c:9: include/linux/regset.h: In function 'user_regset_copyin_ignore': include/linux/regset.h:308:14: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 308 | BUG_ON(*pos < start_pos); | ^ include/linux/compiler.h:182:42: note: in definition of macro 'unlikely' 182 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/regset.h:308:2: note: in expansion of macro 'BUG_ON' 308 | BUG_ON(*pos < start_pos); | ^~~~~~ In file included from arch/arc/kernel/ptrace.c:11: include/linux/regset.h:309:26: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 309 | if (end_pos < 0 || *pos < end_pos) { | ^ arch/arc/kernel/ptrace.c: At top level: arch/arc/kernel/ptrace.c:237:16: warning: no previous prototype for 'syscall_trace_entry' [-Wmissing-prototypes] 237 | asmlinkage int syscall_trace_entry(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~ arch/arc/kernel/ptrace.c:245:17: warning: no previous prototype for 'syscall_trace_exit' [-Wmissing-prototypes] 245 | asmlinkage void syscall_trace_exit(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~ -- In file included from arch/arc/include/asm/bug.h:32, from include/linux/bug.h:4, from include/linux/thread_info.h:11, from include/asm-generic/preempt.h:4, from arch/arc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/module.h:10, from arch/arc/kernel/process.c:12: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 117 | WARN_ON_ONCE(cpu >= nr_cpumask_bits); | ^~ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' 112 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ In file included from include/asm-generic/signal.h:10, from arch/arc/include/uapi/asm/signal.h:25, from include/uapi/linux/signal.h:4, from include/linux/signal.h:6, from include/linux/sched.h:37, from arch/arc/kernel/process.c:13: arch/arc/include/uapi/asm/sigcontext.h: At top level: 20 | struct user_regs_arcv2 v2abi; | ^~~~~ In file included from arch/arc/kernel/process.c:19: include/linux/syscalls.h:180:18: warning: no previous prototype for 'sys_arc_gettls' [-Wmissing-prototypes] 180 | asmlinkage long sys_##sname(void) | ^~~~ arch/arc/kernel/process.c:39:1: note: in expansion of macro 'SYSCALL_DEFINE0' 39 | SYSCALL_DEFINE0(arc_gettls) | ^~~~~~~~~~~~~~~ arch/arc/kernel/process.c:213:5: warning: no previous prototype for 'dump_fpu' [-Wmissing-prototypes] 213 | int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) | ^~~~~~~~ In file included from include/linux/perf_event.h:24, from include/linux/trace_events.h:9, from include/trace/syscall.h:6, from include/linux/syscalls.h:81, from arch/arc/kernel/process.c:19: arch/arc/include/asm/perf_event.h:127:23: warning: 'arc_pmu_cache_map' defined but not used [-Wunused-const-variable=] 127 | static const unsigned arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { | ^~~~~~~~~~~~~~~~~ arch/arc/include/asm/perf_event.h:95:27: warning: 'arc_pmu_ev_hw_map' defined but not used [-Wunused-const-variable=] 95 | static const char * const arc_pmu_ev_hw_map[] = { | ^~~~~~~~~~~~~~~~~ .. vim +/v2abi +20 arch/arc/include/uapi/asm/sigcontext.h 13 14 /* 15 * Signal context structure - contains all info to do with the state 16 * before the signal handler was invoked. 17 */ 18 struct sigcontext { 19 struct user_regs_struct regs; 21 }; 22 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org