tree: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features head: 99441a38c391b1115e405d1f47ede237fca37f1b commit: 527618abb92793b9d4dba548d55822dcebd95317 [15/24] s390/ctlreg: add struct ctlreg config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20230920/202309200800.w8cCwbsF-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230920/202309200800.w8cCwbsF-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202309200800.w8cCwbsF-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/s390/include/asm/lowcore.h:14, from arch/s390/include/asm/current.h:13, from arch/s390/include/asm/preempt.h:5, from include/linux/preempt.h:79, from include/linux/spinlock.h:56, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/mm.h:7, from kernel/kthread.c:11: In function 'local_ctl_load', inlined from 'finish_arch_post_lock_switch' at arch/s390/include/asm/mmu_context.h:114:2, inlined from 'kthread_use_mm' at kernel/kthread.c:1436:2: >> arch/s390/include/asm/ctlreg.h:80:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] 80 | asm volatile( | ^~~ In function 'kthread_use_mm': cc1: note: source object is likely at address zero -- In file included from arch/s390/include/asm/lowcore.h:14, from arch/s390/include/asm/current.h:13, from arch/s390/include/asm/preempt.h:5, from include/linux/preempt.h:79, from include/linux/spinlock.h:56, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/slab.h:16, from fs/exec.c:27: In function 'local_ctl_load', inlined from 'activate_mm' at arch/s390/include/asm/mmu_context.h:123:2, inlined from 'exec_mmap' at fs/exec.c:1026:2: >> arch/s390/include/asm/ctlreg.h:80:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] 80 | asm volatile( | ^~~ In function 'exec_mmap': cc1: note: source object is likely at address zero -- In file included from arch/s390/include/asm/lowcore.h:14, from arch/s390/include/asm/current.h:13, from arch/s390/include/asm/preempt.h:5, from include/linux/preempt.h:79, from arch/s390/include/asm/percpu.h:5, from include/linux/irqflags.h:18, from include/linux/rcupdate.h:26, from include/linux/sysctl.h:26, from arch/s390/mm/pgalloc.c:9: In function 'local_ctl_load', inlined from '__crst_table_upgrade' at arch/s390/mm/pgalloc.c:66:3: >> arch/s390/include/asm/ctlreg.h:80:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] 80 | asm volatile( | ^~~ In function '__crst_table_upgrade': cc1: note: source object is likely at address zero In file included from arch/s390/include/asm/atomic.h:14, from include/linux/atomic.h:7, from include/linux/rcupdate.h:25: In function '__atomic_add', inlined from '__preempt_count_add' at arch/s390/include/asm/preempt.h:59:2, inlined from '__local_bh_disable_ip' at include/linux/bottom_half.h:13:2, inlined from '__raw_spin_lock_bh' at include/linux/spinlock_api_smp.h:125:2, inlined from 'spin_lock_bh' at include/linux/spinlock.h:356:2, inlined from 'crst_table_upgrade' at arch/s390/mm/pgalloc.c:95:2: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:64:1: note: in expansion of macro '__ATOMIC_OPS' 64 | __ATOMIC_OPS(__atomic_add, int, "laa") | ^~~~~~~~~~~~ In function 'crst_table_upgrade': cc1: note: source object is likely at address zero In function '__atomic_add', inlined from '__preempt_count_add' at arch/s390/include/asm/preempt.h:59:2, inlined from '__local_bh_disable_ip' at include/linux/bottom_half.h:13:2, inlined from '__raw_spin_lock_bh' at include/linux/spinlock_api_smp.h:125:2, inlined from 'spin_lock_bh' at include/linux/spinlock.h:356:2, inlined from 'crst_table_upgrade' at arch/s390/mm/pgalloc.c:95:2: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:64:1: note: in expansion of macro '__ATOMIC_OPS' 64 | __ATOMIC_OPS(__atomic_add, int, "laa") | ^~~~~~~~~~~~ In function 'crst_table_upgrade': cc1: note: source object is likely at address zero In function '__atomic_add', inlined from '__preempt_count_add' at arch/s390/include/asm/preempt.h:59:2, inlined from '__local_bh_disable_ip' at include/linux/bottom_half.h:13:2, inlined from '__raw_spin_lock_bh' at include/linux/spinlock_api_smp.h:125:2, inlined from 'spin_lock_bh' at include/linux/spinlock.h:356:2, inlined from 'page_table_alloc' at arch/s390/mm/pgalloc.c:251:3: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:64:1: note: in expansion of macro '__ATOMIC_OPS' 64 | __ATOMIC_OPS(__atomic_add, int, "laa") | ^~~~~~~~~~~~ In function 'page_table_alloc': cc1: note: source object is likely at address zero In function '__atomic_add', inlined from '__preempt_count_add' at arch/s390/include/asm/preempt.h:59:2, inlined from '__local_bh_disable_ip' at include/linux/bottom_half.h:13:2, inlined from '__raw_spin_lock_bh' at include/linux/spinlock_api_smp.h:125:2, inlined from 'spin_lock_bh' at include/linux/spinlock.h:356:2, inlined from 'page_table_alloc' at arch/s390/mm/pgalloc.c:251:3: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:64:1: note: in expansion of macro '__ATOMIC_OPS' 64 | __ATOMIC_OPS(__atomic_add, int, "laa") | ^~~~~~~~~~~~ In function 'page_table_alloc': cc1: note: source object is likely at address zero In function '__atomic_add', inlined from '__preempt_count_add' at arch/s390/include/asm/preempt.h:59:2, inlined from '__local_bh_disable_ip' at include/linux/bottom_half.h:13:2, inlined from '__raw_spin_lock_bh' at include/linux/spinlock_api_smp.h:125:2, inlined from 'spin_lock_bh' at include/linux/spinlock.h:356:2, inlined from 'page_table_alloc' at arch/s390/mm/pgalloc.c:301:3: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:64:1: note: in expansion of macro '__ATOMIC_OPS' 64 | __ATOMIC_OPS(__atomic_add, int, "laa") | ^~~~~~~~~~~~ In function 'page_table_alloc': cc1: note: source object is likely at address zero In function '__atomic_add', inlined from '__preempt_count_add' at arch/s390/include/asm/preempt.h:59:2, inlined from '__local_bh_disable_ip' at include/linux/bottom_half.h:13:2, inlined from '__raw_spin_lock_bh' at include/linux/spinlock_api_smp.h:125:2, inlined from 'spin_lock_bh' at include/linux/spinlock.h:356:2, inlined from 'page_table_alloc' at arch/s390/mm/pgalloc.c:301:3: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ -- In file included from arch/s390/include/asm/rwonce.h:29, from include/linux/compiler.h:246, from include/linux/export.h:5, from include/linux/linkage.h:7, from include/linux/fs.h:5, from include/linux/highmem.h:5, from kernel/sched/core.c:9: In function 'preempt_count', inlined from '__schedule_bug' at kernel/sched/core.c:5912:2: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:17:16: note: in expansion of macro 'READ_ONCE' 17 | return READ_ONCE(S390_lowcore.preempt_count) & ~PREEMPT_NEED_RESCHED; | ^~~~~~~~~ In function '__schedule_bug': cc1: note: source object is likely at address zero In function 'preempt_count', inlined from 'finish_task_switch.isra' at kernel/sched/core.c:5229:6: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:17:16: note: in expansion of macro 'READ_ONCE' 17 | return READ_ONCE(S390_lowcore.preempt_count) & ~PREEMPT_NEED_RESCHED; | ^~~~~~~~~ In function 'finish_task_switch.isra': cc1: note: source object is likely at address zero In function 'preempt_count', inlined from 'finish_task_switch.isra' at kernel/sched/core.c:5229:6: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:17:16: note: in expansion of macro 'READ_ONCE' 17 | return READ_ONCE(S390_lowcore.preempt_count) & ~PREEMPT_NEED_RESCHED; | ^~~~~~~~~ In function 'finish_task_switch.isra': cc1: note: source object is likely at address zero In function 'preempt_count_set', inlined from 'finish_task_switch.isra' at kernel/sched/core.c:5232:3: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:25:23: note: in expansion of macro 'READ_ONCE' 25 | old = READ_ONCE(S390_lowcore.preempt_count); | ^~~~~~~~~ In function 'finish_task_switch.isra': cc1: note: source object is likely at address zero In file included from arch/s390/include/asm/atomic.h:14, from include/linux/atomic.h:7, from include/linux/jump_label.h:255, from arch/s390/include/asm/cpu.h:15, from arch/s390/include/asm/lowcore.h:15, from arch/s390/include/asm/current.h:13, from arch/s390/include/asm/preempt.h:5, from include/linux/preempt.h:79, from include/linux/spinlock.h:56, from include/linux/wait.h:9, from include/linux/wait_bit.h:8, from include/linux/fs.h:6: In function '__atomic_cmpxchg', inlined from 'preempt_count_set' at arch/s390/include/asm/preempt.h:28:11, inlined from 'finish_task_switch.isra' at kernel/sched/core.c:5232:3: arch/s390/include/asm/atomic_ops.h:159:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 159 | asm volatile( | ^~~ In function 'finish_task_switch.isra': cc1: note: source object is likely at address zero In function '__atomic_cmpxchg', inlined from 'preempt_count_set' at arch/s390/include/asm/preempt.h:28:11, inlined from 'finish_task_switch.isra' at kernel/sched/core.c:5232:3: arch/s390/include/asm/atomic_ops.h:159:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] In function 'finish_task_switch.isra': cc1: note: source object is likely at address zero In file included from arch/s390/include/asm/lowcore.h:14: In function 'local_ctl_load', inlined from 'finish_arch_post_lock_switch' at arch/s390/include/asm/mmu_context.h:114:2, inlined from 'finish_task_switch.isra' at kernel/sched/core.c:5253:2: >> arch/s390/include/asm/ctlreg.h:80:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] 80 | asm volatile( | ^~~ In function 'finish_task_switch.isra': cc1: note: source object is likely at address zero In function 'preempt_count', inlined from 'schedule_debug' at kernel/sched/core.c:5952:6, inlined from '__schedule' at kernel/sched/core.c:6589:2: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:17:16: note: in expansion of macro 'READ_ONCE' 17 | return READ_ONCE(S390_lowcore.preempt_count) & ~PREEMPT_NEED_RESCHED; | ^~~~~~~~~ In function '__schedule': cc1: note: source object is likely at address zero In function 'preempt_count_set', inlined from 'schedule_debug' at kernel/sched/core.c:5954:3, inlined from '__schedule' at kernel/sched/core.c:6589:2: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:25:23: note: in expansion of macro 'READ_ONCE' 25 | old = READ_ONCE(S390_lowcore.preempt_count); | ^~~~~~~~~ In function '__schedule': cc1: note: source object is likely at address zero In function '__atomic_cmpxchg', inlined from 'preempt_count_set' at arch/s390/include/asm/preempt.h:28:11, inlined from 'schedule_debug' at kernel/sched/core.c:5954:3, inlined from '__schedule' at kernel/sched/core.c:6589:2: arch/s390/include/asm/atomic_ops.h:159:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 159 | asm volatile( | ^~~ In function '__schedule': cc1: note: source object is likely at address zero In function '__atomic_cmpxchg', inlined from 'preempt_count_set' at arch/s390/include/asm/preempt.h:28:11, inlined from 'schedule_debug' at kernel/sched/core.c:5954:3, inlined from '__schedule' at kernel/sched/core.c:6589:2: arch/s390/include/asm/atomic_ops.h:159:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] In function '__schedule': cc1: note: source object is likely at address zero In function '__atomic_or', inlined from 'clear_preempt_need_resched' at arch/s390/include/asm/preempt.h:39:2, inlined from '__schedule' at kernel/sched/core.c:6661:2: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:66:1: note: in expansion of macro '__ATOMIC_OPS' 66 | __ATOMIC_OPS(__atomic_or, int, "lao") | ^~~~~~~~~~~~ In function '__schedule': cc1: note: source object is likely at address zero In function '__atomic_or', inlined from 'clear_preempt_need_resched' at arch/s390/include/asm/preempt.h:39:2, inlined from '__schedule' at kernel/sched/core.c:6661:2: arch/s390/include/asm/atomic_ops.h:52:9: warning: array subscript 0 is outside array bounds of 'int[0]' [-Warray-bounds=] 52 | asm volatile( \ | ^~~ arch/s390/include/asm/atomic_ops.h:61:9: note: in expansion of macro '__ATOMIC_OP' 61 | __ATOMIC_OP(op_name, op_type, op_string, "\n") \ | ^~~~~~~~~~~ arch/s390/include/asm/atomic_ops.h:66:1: note: in expansion of macro '__ATOMIC_OPS' 66 | __ATOMIC_OPS(__atomic_or, int, "lao") | ^~~~~~~~~~~~ In function '__schedule': cc1: note: source object is likely at address zero In function 'should_resched', inlined from '__cond_resched' at kernel/sched/core.c:8562:6: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:77:45: note: in definition of macro 'unlikely' 77 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/asm-generic/rwonce.h:50:9: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/s390/include/asm/preempt.h:74:25: note: in expansion of macro 'READ_ONCE' 74 | return unlikely(READ_ONCE(S390_lowcore.preempt_count) == | ^~~~~~~~~ In function '__cond_resched': cc1: note: source object is likely at address zero In function 'should_resched', inlined from '__cond_resched_lock' at kernel/sched/core.c:8628:16: include/asm-generic/rwonce.h:44:26: warning: array subscript 0 is outside array bounds of 'const volatile int[0]' [-Warray-bounds=] 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:77:45: note: in definition of macro 'unlikely' 77 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ .. vim +80 arch/s390/include/asm/ctlreg.h a0616cdebcfd57 arch/s390/include/asm/ctl_reg.h David Howells 2012-03-28 77 527618abb92793 arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 78 static __always_inline void local_ctl_load(unsigned int cr, struct ctlreg *reg) dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 79 { dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 @80 asm volatile( dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 81 " lctlg %[cr],%[cr],%[reg]\n" dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 82 : dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 83 : [reg] "Q" (*reg), [cr] "i" (cr) dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 84 : "memory"); dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 85 } dfa33ce1245a4b arch/s390/include/asm/ctlreg.h Heiko Carstens 2023-09-11 86 :::::: The code at line 80 was first introduced by commit :::::: dfa33ce1245a4b88402947fa0a847e179044d2fc s390/ctlreg: add local_ctl_load() and local_ctl_store() :::::: TO: Heiko Carstens <hca@xxxxxxxxxxxxx> :::::: CC: Vasily Gorbik <gor@xxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
