Hi Lu, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 66b0cef2a959be1562a528e3d8cc260dc3803e61 commit: 654944510822988390470cbc5b6f914c19dd9b88 [2329/2329] sched/psi: add cpu fine grained stall tracking in pressure.stat config: arm64-randconfig-004-20250529 (https://download.01.org/0day-ci/archive/20250528/202505282313.Lw9dIqW7-lkp@i...) compiler: aarch64-linux-gcc (GCC) 8.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250528/202505282313.Lw9dIqW7-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202505282313.Lw9dIqW7-lkp@intel.com/ All errors (new ones prefixed by >>): ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1870:15: error: initializer element is not constant .proc_open = psi_io_open, ^~~~~~~~~~~ kernel/sched/psi.c:1870:15: note: (near initialization for 'psi_io_proc_ops.proc_open') kernel/sched/psi.c:1873:16: error: initializer element is not constant .proc_write = psi_io_write, ^~~~~~~~~~~~ kernel/sched/psi.c:1873:16: note: (near initialization for 'psi_io_proc_ops.proc_write') kernel/sched/psi.c:1874:15: error: initializer element is not constant .proc_poll = psi_fop_poll, ^~~~~~~~~~~~ kernel/sched/psi.c:1874:15: note: (near initialization for 'psi_io_proc_ops.proc_poll') kernel/sched/psi.c:1875:18: error: initializer element is not constant .proc_release = psi_fop_release, ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1875:18: note: (near initialization for 'psi_io_proc_ops.proc_release') kernel/sched/psi.c:1879:15: error: initializer element is not constant .proc_open = psi_memory_open, ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1879:15: note: (near initialization for 'psi_memory_proc_ops.proc_open') kernel/sched/psi.c:1882:16: error: initializer element is not constant .proc_write = psi_memory_write, ^~~~~~~~~~~~~~~~ kernel/sched/psi.c:1882:16: note: (near initialization for 'psi_memory_proc_ops.proc_write') kernel/sched/psi.c:1883:15: error: initializer element is not constant .proc_poll = psi_fop_poll, ^~~~~~~~~~~~ kernel/sched/psi.c:1883:15: note: (near initialization for 'psi_memory_proc_ops.proc_poll') kernel/sched/psi.c:1884:18: error: initializer element is not constant .proc_release = psi_fop_release, ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1884:18: note: (near initialization for 'psi_memory_proc_ops.proc_release') kernel/sched/psi.c:1888:15: error: initializer element is not constant .proc_open = psi_cpu_open, ^~~~~~~~~~~~ kernel/sched/psi.c:1888:15: note: (near initialization for 'psi_cpu_proc_ops.proc_open') kernel/sched/psi.c:1891:16: error: initializer element is not constant .proc_write = psi_cpu_write, ^~~~~~~~~~~~~ kernel/sched/psi.c:1891:16: note: (near initialization for 'psi_cpu_proc_ops.proc_write') kernel/sched/psi.c:1892:15: error: initializer element is not constant .proc_poll = psi_fop_poll, ^~~~~~~~~~~~ kernel/sched/psi.c:1892:15: note: (near initialization for 'psi_cpu_proc_ops.proc_poll') kernel/sched/psi.c:1893:18: error: initializer element is not constant .proc_release = psi_fop_release, ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1893:18: note: (near initialization for 'psi_cpu_proc_ops.proc_release') kernel/sched/psi.c:1907:13: error: invalid storage class for function 'get_stat_names' static void get_stat_names(struct seq_file *m, int i, bool is_full) ^~~~~~~~~~~~~~ kernel/sched/psi.c:1953:12: error: invalid storage class for function 'system_psi_stat_show' static int system_psi_stat_show(struct seq_file *m, void *v) ^~~~~~~~~~~~~~~~~~~~ kernel/sched/psi.c:1958:12: error: invalid storage class for function 'psi_stat_open' static int psi_stat_open(struct inode *inode, struct file *file) ^~~~~~~~~~~~~ kernel/sched/psi.c:1964:15: error: initializer element is not constant .proc_open = psi_stat_open, ^~~~~~~~~~~~~ kernel/sched/psi.c:1964:15: note: (near initialization for 'psi_stat_proc_ops.proc_open') kernel/sched/psi.c:1967:18: error: initializer element is not constant .proc_release = psi_fop_release, ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1967:18: note: (near initialization for 'psi_stat_proc_ops.proc_release') kernel/sched/psi.c:1972:12: error: invalid storage class for function 'psi_irq_show' static int psi_irq_show(struct seq_file *m, void *v) ^~~~~~~~~~~~ kernel/sched/psi.c:1977:12: error: invalid storage class for function 'psi_irq_open' static int psi_irq_open(struct inode *inode, struct file *file) ^~~~~~~~~~~~ kernel/sched/psi.c:1982:16: error: invalid storage class for function 'psi_irq_write' static ssize_t psi_irq_write(struct file *file, const char __user *user_buf, ^~~~~~~~~~~~~ kernel/sched/psi.c:1989:15: error: initializer element is not constant .proc_open = psi_irq_open, ^~~~~~~~~~~~ kernel/sched/psi.c:1989:15: note: (near initialization for 'psi_irq_proc_ops.proc_open') kernel/sched/psi.c:1992:16: error: initializer element is not constant .proc_write = psi_irq_write, ^~~~~~~~~~~~~ kernel/sched/psi.c:1992:16: note: (near initialization for 'psi_irq_proc_ops.proc_write') kernel/sched/psi.c:1993:15: error: initializer element is not constant .proc_poll = psi_fop_poll, ^~~~~~~~~~~~ kernel/sched/psi.c:1993:15: note: (near initialization for 'psi_irq_proc_ops.proc_poll') kernel/sched/psi.c:1994:18: error: initializer element is not constant .proc_release = psi_fop_release, ^~~~~~~~~~~~~~~ kernel/sched/psi.c:1994:18: note: (near initialization for 'psi_irq_proc_ops.proc_release') kernel/sched/psi.c:1998:19: error: invalid storage class for function 'psi_proc_init' static int __init psi_proc_init(void) ^~~~~~~~~~~~~ In file included from include/linux/build_bug.h:5, from include/linux/container_of.h:5, from include/linux/list.h:5, from include/linux/smp.h:12, from include/linux/sched/clock.h:5, from kernel/sched/build_utility.c:12:

...

include/linux/compiler.h:215:46: error: initializer element is not constant __UNIQUE_ID(__PASTE(__addressable_,sym)) = (void *)&sym; ^ include/linux/compiler.h:217:2: note: in expansion of macro '___ADDRESSABLE' ___ADDRESSABLE(sym, __section(".discard.addressable")) ^~~~~~~~~~~~~~ include/linux/init.h:256:2: note: in expansion of macro '__ADDRESSABLE' __ADDRESSABLE(fn) ^~~~~~~~~~~~~ include/linux/init.h:261:2: note: in expansion of macro '__define_initcall_stub' __define_initcall_stub(__stub, fn) \ ^~~~~~~~~~~~~~~~~~~~~~ include/linux/init.h:274:2: note: in expansion of macro '____define_initcall' ____define_initcall(fn, \ ^~~~~~~~~~~~~~~~~~~ include/linux/init.h:280:2: note: in expansion of macro '__unique_initcall' __unique_initcall(fn, id, __sec, __initcall_id(fn)) ^~~~~~~~~~~~~~~~~ include/linux/init.h:282:35: note: in expansion of macro '___define_initcall' #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id) ^~~~~~~~~~~~~~~~~~ include/linux/init.h:311:30: note: in expansion of macro '__define_initcall' #define device_initcall(fn) __define_initcall(fn, 6) ^~~~~~~~~~~~~~~~~ include/linux/init.h:316:24: note: in expansion of macro 'device_initcall' #define __initcall(fn) device_initcall(fn) ^~~~~~~~~~~~~~~ include/linux/module.h:88:24: note: in expansion of macro '__initcall' #define module_init(x) __initcall(x); ^~~~~~~~~~ kernel/sched/psi.c:2014:1: note: in expansion of macro 'module_init' module_init(psi_proc_init); ^~~~~~~~~~~ In file included from kernel/sched/build_utility.c:101: kernel/sched/membarrier.c:165:13: error: invalid storage class for function 'ipi_mb' static void ipi_mb(void *info) ^~~~~~ kernel/sched/membarrier.c:170:13: error: invalid storage class for function 'ipi_sync_core' static void ipi_sync_core(void *info) ^~~~~~~~~~~~~ kernel/sched/membarrier.c:187:13: error: invalid storage class for function 'ipi_rseq' static void ipi_rseq(void *info) ^~~~~~~~ kernel/sched/membarrier.c:200:13: error: invalid storage class for function 'ipi_sync_rq_state' static void ipi_sync_rq_state(void *info) ^~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:245:12: error: invalid storage class for function 'membarrier_global_expedited' static int membarrier_global_expedited(void) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:310:12: error: invalid storage class for function 'membarrier_private_expedited' static int membarrier_private_expedited(int flags, int cpu_id) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:426:12: error: invalid storage class for function 'sync_runqueues_membarrier_state' static int sync_runqueues_membarrier_state(struct mm_struct *mm) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:483:12: error: invalid storage class for function 'membarrier_register_global_expedited' static int membarrier_register_global_expedited(void) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:502:12: error: invalid storage class for function 'membarrier_register_private_expedited' static int membarrier_register_private_expedited(int flags) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:544:12: error: invalid storage class for function 'membarrier_get_registrations' static int membarrier_get_registrations(void) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/syscalls_api.h:1, from kernel/sched/sched.h:61, from kernel/sched/build_utility.c:53: include/linux/syscalls.h:157:33: error: redeclaration of '__syscall_meta__membarrier' with no linkage static struct syscall_metadata __syscall_meta_##sname; \ ^~~~~~~~~~~~~~~ include/linux/syscalls.h:180:2: note: in expansion of macro 'SYSCALL_TRACE_EXIT_EVENT' SYSCALL_TRACE_EXIT_EVENT(sname); \ ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:229:2: note: in expansion of macro 'SYSCALL_METADATA' SYSCALL_METADATA(sname, x, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id) ^~~~~~~~~~~~~~~ include/linux/syscalls.h:141:33: note: previous declaration of '__syscall_meta__membarrier' was here static struct syscall_metadata __syscall_meta_##sname; \ ^~~~~~~~~~~~~~~ include/linux/syscalls.h:179:2: note: in expansion of macro 'SYSCALL_TRACE_ENTER_EVENT' SYSCALL_TRACE_ENTER_EVENT(sname); \ ^~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:229:2: note: in expansion of macro 'SYSCALL_METADATA' SYSCALL_METADATA(sname, x, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id) ^~~~~~~~~~~~~~~ include/linux/syscalls.h:182:4: error: redeclaration of '__syscall_meta__membarrier' with no linkage __syscall_meta_##sname = { \ ^~~~~~~~~~~~~~~ include/linux/syscalls.h:229:2: note: in expansion of macro 'SYSCALL_METADATA' SYSCALL_METADATA(sname, x, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id) ^~~~~~~~~~~~~~~ include/linux/syscalls.h:157:33: note: previous declaration of '__syscall_meta__membarrier' was here static struct syscall_metadata __syscall_meta_##sname; \ ^~~~~~~~~~~~~~~ include/linux/syscalls.h:180:2: note: in expansion of macro 'SYSCALL_TRACE_EXIT_EVENT' SYSCALL_TRACE_EXIT_EVENT(sname); \ ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:229:2: note: in expansion of macro 'SYSCALL_METADATA' SYSCALL_METADATA(sname, x, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id) ^~~~~~~~~~~~~~~ In file included from include/linux/compat.h:34, from arch/arm64/include/asm/elf.h:9, from include/linux/elf.h:6, from include/linux/module.h:19, from include/linux/device/driver.h:21, from include/linux/device.h:32, from include/linux/node.h:18, from include/linux/cpu.h:17, from include/linux/cpufreq.h:12, from kernel/sched/build_utility.c:22: arch/arm64/include/asm/syscall_wrapper.h:55:14: error: invalid storage class for function '__se_sys_membarrier' static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ ^~~~~~~~ include/linux/syscalls.h:230:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id) ^~~~~~~~~~~~~~~ arch/arm64/include/asm/syscall_wrapper.h:56:21: error: invalid storage class for function '__do_sys_membarrier' static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ ^~~~~~~~ include/linux/syscalls.h:230:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id) ^~~~~~~~~~~~~~~ arch/arm64/include/asm/syscall_wrapper.h:58:18: error: static declaration of '__arm64_sys_membarrier' follows non-static declaration asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \ ^~~~~~~~~~~ include/linux/syscalls.h:230:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3'

vim +215 include/linux/compiler.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 206 7290d58095712a Ard Biesheuvel 2018-08-21 207 /* 7290d58095712a Ard Biesheuvel 2018-08-21 208 * Force the compiler to emit 'sym' as a symbol, so that we can reference 7290d58095712a Ard Biesheuvel 2018-08-21 209 * it from inline assembler. Necessary in case 'sym' could be inlined 7290d58095712a Ard Biesheuvel 2018-08-21 210 * otherwise, or eliminated entirely due to lack of references that are 7290d58095712a Ard Biesheuvel 2018-08-21 211 * visible to the compiler. 7290d58095712a Ard Biesheuvel 2018-08-21 212 */ 92efda8eb15295 Sami Tolvanen 2022-09-08 213 #define ___ADDRESSABLE(sym, __attrs) \ 92efda8eb15295 Sami Tolvanen 2022-09-08 214 static void * __used __attrs \ 563a02b0c9704f Josh Poimboeuf 2020-08-18 @215 __UNIQUE_ID(__PASTE(__addressable_,sym)) = (void *)&sym; 92efda8eb15295 Sami Tolvanen 2022-09-08 216 #define __ADDRESSABLE(sym) \ 92efda8eb15295 Sami Tolvanen 2022-09-08 217 ___ADDRESSABLE(sym, __section(".discard.addressable")) 7290d58095712a Ard Biesheuvel 2018-08-21 218 :::::: The code at line 215 was first introduced by commit :::::: 563a02b0c9704f69c0364befedd451f57fe88092 compiler.h: Make __ADDRESSABLE() symbol truly unique :::::: TO: Josh Poimboeuf <jpoimboe@redhat.com> :::::: CC: Ingo Molnar <mingo@kernel.org> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki