tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: bf9f243f23e6623f310ba03fbb14e10ec3a61290 commit: a8b62fd0850503cf1e557d7e5a98d3f1f5c25eef stop_machine: Add function and caller debug info date: 10 months ago config: i386-randconfig-r032-20210910 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout a8b62fd0850503cf1e557d7e5a98d3f1f5c25eef # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:6: In file included from include/linux/stop_machine.h:5: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: include/linux/device.h:630:46: warning: unused parameter 'dev' [-Wunused-parameter] static inline int dev_to_node(struct device *dev) ^ include/linux/device.h:634:48: warning: unused parameter 'dev' [-Wunused-parameter] static inline void set_dev_node(struct device *dev, int node) ^ include/linux/device.h:634:57: warning: unused parameter 'node' [-Wunused-parameter] static inline void set_dev_node(struct device *dev, int node) ^ include/linux/device.h:639:74: warning: unused parameter 'dev' [-Wunused-parameter] static inline struct irq_domain *dev_get_msi_domain(const struct device *dev) ^ include/linux/device.h:648:54: warning: unused parameter 'dev' [-Wunused-parameter] static inline void dev_set_msi_domain(struct device *dev, struct irq_domain *d) ^ include/linux/device.h:648:78: warning: unused parameter 'd' [-Wunused-parameter] static inline void dev_set_msi_domain(struct device *dev, struct irq_domain *d) ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:6: In file included from include/linux/stop_machine.h:5: In file included from include/linux/cpu.h:17: include/linux/node.h:72:48: warning: unused parameter 'nid' [-Wunused-parameter] static inline void node_add_cache(unsigned int nid, ^ include/linux/node.h:73:32: warning: unused parameter 'cache_attrs' [-Wunused-parameter] struct node_cache_attrs *cache_attrs) ^ include/linux/node.h:77:53: warning: unused parameter 'nid' [-Wunused-parameter] static inline void node_set_perf_attrs(unsigned int nid, ^ include/linux/node.h:78:36: warning: unused parameter 'hmem_attrs' [-Wunused-parameter] struct node_hmem_attrs *hmem_attrs, ^ include/linux/node.h:79:21: warning: unused parameter 'access' [-Wunused-parameter] unsigned access) ^ include/linux/node.h:106:42: warning: unused parameter 'nid' [-Wunused-parameter] static inline void link_mem_sections(int nid, unsigned long start_pfn, ^ include/linux/node.h:106:61: warning: unused parameter 'start_pfn' [-Wunused-parameter] static inline void link_mem_sections(int nid, unsigned long start_pfn, ^ include/linux/node.h:107:24: warning: unused parameter 'end_pfn' [-Wunused-parameter] unsigned long end_pfn, ^ include/linux/node.h:108:31: warning: unused parameter 'context' [-Wunused-parameter] enum meminit_context context) ^ include/linux/node.h:152:43: warning: unused parameter 'nid' [-Wunused-parameter] static inline int __register_one_node(int nid) ^ include/linux/node.h:156:41: warning: unused parameter 'nid' [-Wunused-parameter] static inline int register_one_node(int nid) ^ include/linux/node.h:160:43: warning: unused parameter 'nid' [-Wunused-parameter] static inline int unregister_one_node(int nid) ^ include/linux/node.h:164:56: warning: unused parameter 'cpu' [-Wunused-parameter] static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:164:74: warning: unused parameter 'nid' [-Wunused-parameter] static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:168:58: warning: unused parameter 'cpu' [-Wunused-parameter] static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:168:76: warning: unused parameter 'nid' [-Wunused-parameter] static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:172:77: warning: unused parameter 'mem_blk' [-Wunused-parameter] static inline void unregister_memory_block_under_nodes(struct memory_block *mem_blk) ^ include/linux/node.h:176:74: warning: unused parameter 'reg' [-Wunused-parameter] static inline void register_hugetlbfs_with_node(node_registration_func_t reg, ^ include/linux/node.h:177:32: warning: unused parameter 'unreg' [-Wunused-parameter] node_registration_func_t unreg) ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:6: In file included from include/linux/stop_machine.h:5: In file included from include/linux/cpu.h:20: include/linux/cpuhotplug.h:409:55: warning: unused parameter 'state' [-Wunused-parameter] static inline void cpuhp_online_idle(enum cpuhp_state state) { } ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:6: In file included from include/linux/stop_machine.h:5: include/linux/cpu.h:138:59: warning: unused parameter 'primary_cpu' [-Wunused-parameter] static inline void smp_shutdown_nonboot_cpus(unsigned int primary_cpu) { } ^ include/linux/cpu.h:221:41: warning: unused parameter 'force' [-Wunused-parameter] static inline void cpu_smt_disable(bool force) { } ^ include/linux/cpu.h:225:60: warning: unused parameter 'ctrlval' [-Wunused-parameter] static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { return 0; } ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:6: static inline void print_stop_info(const char *log_lvl, struct task_struct *task) { } ^ static inline void print_stop_info(const char *log_lvl, struct task_struct *task) { } ^ include/linux/stop_machine.h:132:30: warning: unused parameter 'cpus' [-Wunused-parameter] const struct cpumask *cpus) ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:13: In file included from drivers/gpu/drm/i915/gt/intel_gt.h:9: In file included from drivers/gpu/drm/i915/gt/intel_engine_types.h:21: In file included from drivers/gpu/drm/i915/i915_gem.h:29: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:5: include/linux/context_tracking_state.h:51:53: warning: unused parameter 'cpu' [-Wunused-parameter] static inline bool context_tracking_enabled_cpu(int cpu) { return false; } ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:13: In file included from drivers/gpu/drm/i915/gt/intel_gt.h:9: In file included from drivers/gpu/drm/i915/gt/intel_engine_types.h:21: In file included from drivers/gpu/drm/i915/i915_gem.h:29: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:9: include/linux/vtime.h:54:53: warning: unused parameter 'cpu' [-Wunused-parameter] static inline bool vtime_accounting_enabled_cpu(int cpu) {return false; } ^ include/linux/vtime.h:56:58: warning: unused parameter 'prev' [-Wunused-parameter] static inline void vtime_task_switch(struct task_struct *prev) { } ^ include/linux/vtime.h:67:61: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_account_kernel(struct task_struct *tsk) { } ^ include/linux/vtime.h:78:57: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_user_enter(struct task_struct *tsk) { } ^ include/linux/vtime.h:79:56: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_user_exit(struct task_struct *tsk) { } ^ include/linux/vtime.h:80:58: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_guest_enter(struct task_struct *tsk) { } ^ include/linux/vtime.h:81:57: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_guest_exit(struct task_struct *tsk) { } ^ include/linux/vtime.h:82:56: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } ^ include/linux/vtime.h:82:65: warning: unused parameter 'cpu' [-Wunused-parameter] static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } ^ include/linux/vtime.h:94:64: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_account_irq_enter(struct task_struct *tsk) { } ^ include/linux/vtime.h:95:63: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_account_irq_exit(struct task_struct *tsk) { } ^ include/linux/vtime.h:96:52: warning: unused parameter 'tsk' [-Wunused-parameter] static inline void vtime_flush(struct task_struct *tsk) { } ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:13: In file included from drivers/gpu/drm/i915/gt/intel_gt.h:9: In file included from drivers/gpu/drm/i915/gt/intel_engine_types.h:21: In file included from drivers/gpu/drm/i915/i915_gem.h:29: In file included from include/linux/interrupt.h:20: In file included from arch/x86/include/asm/sections.h:7: include/asm-generic/sections.h:70:53: warning: unused parameter 'addr' [-Wunused-parameter] static inline int arch_is_kernel_text(unsigned long addr) ^ include/asm-generic/sections.h:77:53: warning: unused parameter 'addr' [-Wunused-parameter] static inline int arch_is_kernel_data(unsigned long addr) ^ In file included from drivers/gpu/drm/i915/gt/intel_ggtt.c:13: In file included from drivers/gpu/drm/i915/gt/intel_gt.h:9: In file included from drivers/gpu/drm/i915/gt/intel_engine_types.h:21: In file included from drivers/gpu/drm/i915/i915_gem.h:29: include/linux/interrupt.h:367:49: warning: unused parameter 'irq' [-Wunused-parameter] static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m) ^ include/linux/interrupt.h:367:76: warning: unused parameter 'm' [-Wunused-parameter] static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m) ^ include/linux/interrupt.h:372:51: warning: unused parameter 'irq' [-Wunused-parameter] static inline int irq_force_affinity(unsigned int irq, const struct cpumask *cpumask) ^ include/linux/interrupt.h:372:78: warning: unused parameter 'cpumask' [-Wunused-parameter] static inline int irq_force_affinity(unsigned int irq, const struct cpumask *cpumask) ^ include/linux/interrupt.h:377:53: warning: unused parameter 'irq' [-Wunused-parameter] static inline int irq_can_set_affinity(unsigned int irq) ^ include/linux/interrupt.h:382:52: warning: unused parameter 'irq' [-Wunused-parameter] static inline int irq_select_affinity(unsigned int irq) { return 0; } ^ include/linux/interrupt.h:384:54: warning: unused parameter 'irq' [-Wunused-parameter] static inline int irq_set_affinity_hint(unsigned int irq, ^ include/linux/interrupt.h:385:28: warning: unused parameter 'm' [-Wunused-parameter] const struct cpumask *m) ^ include/linux/interrupt.h:391:40: warning: unused parameter 'irq' [-Wunused-parameter] irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify) ^ include/linux/interrupt.h:391:73: warning: unused parameter 'notify' [-Wunused-parameter] -- In file included from drivers/gpu/drm/i915/gt/intel_reset.c:8: In file included from include/linux/stop_machine.h:5: In file included from include/linux/cpu.h:17: In file included from include/linux/node.h:18: include/linux/device.h:630:46: warning: unused parameter 'dev' [-Wunused-parameter] static inline int dev_to_node(struct device *dev) ^ include/linux/device.h:634:48: warning: unused parameter 'dev' [-Wunused-parameter] static inline void set_dev_node(struct device *dev, int node) ^ include/linux/device.h:634:57: warning: unused parameter 'node' [-Wunused-parameter] static inline void set_dev_node(struct device *dev, int node) ^ include/linux/device.h:639:74: warning: unused parameter 'dev' [-Wunused-parameter] static inline struct irq_domain *dev_get_msi_domain(const struct device *dev) ^ include/linux/device.h:648:54: warning: unused parameter 'dev' [-Wunused-parameter] static inline void dev_set_msi_domain(struct device *dev, struct irq_domain *d) ^ include/linux/device.h:648:78: warning: unused parameter 'd' [-Wunused-parameter] static inline void dev_set_msi_domain(struct device *dev, struct irq_domain *d) ^ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:8: In file included from include/linux/stop_machine.h:5: In file included from include/linux/cpu.h:17: include/linux/node.h:72:48: warning: unused parameter 'nid' [-Wunused-parameter] static inline void node_add_cache(unsigned int nid, ^ include/linux/node.h:73:32: warning: unused parameter 'cache_attrs' [-Wunused-parameter] struct node_cache_attrs *cache_attrs) ^ include/linux/node.h:77:53: warning: unused parameter 'nid' [-Wunused-parameter] static inline void node_set_perf_attrs(unsigned int nid, ^ include/linux/node.h:78:36: warning: unused parameter 'hmem_attrs' [-Wunused-parameter] struct node_hmem_attrs *hmem_attrs, ^ include/linux/node.h:79:21: warning: unused parameter 'access' [-Wunused-parameter] unsigned access) ^ include/linux/node.h:106:42: warning: unused parameter 'nid' [-Wunused-parameter] static inline void link_mem_sections(int nid, unsigned long start_pfn, ^ include/linux/node.h:106:61: warning: unused parameter 'start_pfn' [-Wunused-parameter] static inline void link_mem_sections(int nid, unsigned long start_pfn, ^ include/linux/node.h:107:24: warning: unused parameter 'end_pfn' [-Wunused-parameter] unsigned long end_pfn, ^ include/linux/node.h:108:31: warning: unused parameter 'context' [-Wunused-parameter] enum meminit_context context) ^ include/linux/node.h:152:43: warning: unused parameter 'nid' [-Wunused-parameter] static inline int __register_one_node(int nid) ^ include/linux/node.h:156:41: warning: unused parameter 'nid' [-Wunused-parameter] static inline int register_one_node(int nid) ^ include/linux/node.h:160:43: warning: unused parameter 'nid' [-Wunused-parameter] static inline int unregister_one_node(int nid) ^ include/linux/node.h:164:56: warning: unused parameter 'cpu' [-Wunused-parameter] static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:164:74: warning: unused parameter 'nid' [-Wunused-parameter] static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:168:58: warning: unused parameter 'cpu' [-Wunused-parameter] static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:168:76: warning: unused parameter 'nid' [-Wunused-parameter] static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) ^ include/linux/node.h:172:77: warning: unused parameter 'mem_blk' [-Wunused-parameter] static inline void unregister_memory_block_under_nodes(struct memory_block *mem_blk) ^ include/linux/node.h:176:74: warning: unused parameter 'reg' [-Wunused-parameter] static inline void register_hugetlbfs_with_node(node_registration_func_t reg, ^ include/linux/node.h:177:32: warning: unused parameter 'unreg' [-Wunused-parameter] node_registration_func_t unreg) ^ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:8: In file included from include/linux/stop_machine.h:5: In file included from include/linux/cpu.h:20: include/linux/cpuhotplug.h:409:55: warning: unused parameter 'state' [-Wunused-parameter] static inline void cpuhp_online_idle(enum cpuhp_state state) { } ^ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:8: In file included from include/linux/stop_machine.h:5: include/linux/cpu.h:138:59: warning: unused parameter 'primary_cpu' [-Wunused-parameter] static inline void smp_shutdown_nonboot_cpus(unsigned int primary_cpu) { } ^ include/linux/cpu.h:221:41: warning: unused parameter 'force' [-Wunused-parameter] static inline void cpu_smt_disable(bool force) { } ^ include/linux/cpu.h:225:60: warning: unused parameter 'ctrlval' [-Wunused-parameter] static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { return 0; } ^ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:8: static inline void print_stop_info(const char *log_lvl, struct task_struct *task) { } ^ static inline void print_stop_info(const char *log_lvl, struct task_struct *task) { } ^ include/linux/stop_machine.h:132:30: warning: unused parameter 'cpus' [-Wunused-parameter] const struct cpumask *cpus) ^ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:10: In file included from drivers/gpu/drm/i915/display/intel_display_types.h:30: In file included from include/linux/i2c.h:13: In file included from include/linux/acpi.h:13: In file included from include/linux/irqdomain.h:35: include/linux/of.h:1018:54: warning: unused parameter 'device' [-Wunused-parameter] static inline int of_node_to_nid(struct device_node *device) ^ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:10: In file included from drivers/gpu/drm/i915/display/intel_display_types.h:30: In file included from include/linux/i2c.h:13: In file included from include/linux/acpi.h:14: In file included from include/linux/resource_ext.h:11: In file included from include/linux/slab.h:19: include/linux/percpu-refcount.h:205:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_add(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:509:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:379:11: note: expanded from macro '__pcpu_size_call' case 4: stem##4(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:79:1: note: expanded from here this_cpu_add_4 ^ arch/x86/include/asm/percpu.h:268:34: note: expanded from macro 'this_cpu_add_4' #define this_cpu_add_4(pcp, val) percpu_add_op(4, volatile, (pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:127:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:10: In file included from drivers/gpu/drm/i915/display/intel_display_types.h:30: In file included from include/linux/i2c.h:13: In file included from include/linux/acpi.h:14: In file included from include/linux/resource_ext.h:11: In file included from include/linux/slab.h:19: include/linux/percpu-refcount.h:244:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_add(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:509:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:379:11: note: expanded from macro '__pcpu_size_call' case 4: stem##4(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:110:1: note: expanded from here this_cpu_add_4 ^ arch/x86/include/asm/percpu.h:268:34: note: expanded from macro 'this_cpu_add_4' #define this_cpu_add_4(pcp, val) percpu_add_op(4, volatile, (pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:127:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:10: In file included from drivers/gpu/drm/i915/display/intel_display_types.h:30: In file included from include/linux/i2c.h:13: In file included from include/linux/acpi.h:14: In file included from include/linux/resource_ext.h:11: In file included from include/linux/slab.h:19: include/linux/percpu-refcount.h:320:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_sub(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:519:33: note: expanded from macro 'this_cpu_sub' #define this_cpu_sub(pcp, val) this_cpu_add(pcp, -(typeof(pcp))(val)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:509:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:379:11: note: expanded from macro '__pcpu_size_call' case 4: stem##4(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:172:1: note: expanded from here this_cpu_add_4 ^ arch/x86/include/asm/percpu.h:268:34: note: expanded from macro 'this_cpu_add_4' #define this_cpu_add_4(pcp, val) percpu_add_op(4, volatile, (pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:127:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from drivers/gpu/drm/i915/gt/intel_reset.c:10: In file included from drivers/gpu/drm/i915/display/intel_display_types.h:30: In file included from include/linux/i2c.h:13: In file included from include/linux/acpi.h:14: In file included from include/linux/resource_ext.h:11: In file included from include/linux/slab.h:136: include/linux/kasan.h:106:54: warning: unused parameter 'address' [-Wunused-parameter] static inline void kasan_unpoison_shadow(const void *address, size_t size) {} ^ include/linux/kasan.h:106:70: warning: unused parameter 'size' [-Wunused-parameter] static inline void kasan_unpoison_shadow(const void *address, size_t size) {} ^ .. vim +/log_lvl +86 include/linux/stop_machine.h 85 87 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org