[kbuild-all] [mingo-tip:sched/headers 168/2384] include/linux/sched/affinity.h:32:9: error: incomplete definition of type 'struct task_struct'

tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers head: 4c707c1c0de83967079b4e385012fa5b00e2cd11 commit: 92675dd8b872d91539f60f7dc7ddf7e2a1c70361 [168/2384] headers/deps: Move CPU affinity APIs from <linux/sched.h> to <linux/sched/affinity.h> config: i386-randconfig-a014-20220109 (https://download.01.org/0day-ci/archive/20220117/202201171113.5k8tKBGY-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5f782d25a742302d25ef3c8b84b54f7483c2deb9) 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/mingo/tip.git/commit/?id=... git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git git fetch --no-tags mingo-tip sched/headers git checkout 92675dd8b872d91539f60f7dc7ddf7e2a1c70361 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the mingo-tip/sched/headers HEAD 4c707c1c0de83967079b4e385012fa5b00e2cd11 builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): In file included from lib/syscall.c:2: if (src->user_cpus_ptr) ~~~^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ if (src->user_cpus_ptr) ~~~^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ if (src->user_cpus_ptr) ~~~^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ include/linux/sched/affinity.h:38:11: error: incomplete definition of type 'struct task_struct' WARN_ON(p->user_cpus_ptr); ~^ include/asm-generic/bug.h:121:25: note: expanded from macro 'WARN_ON' int __ret_warn_on = !!(condition); \ ^~~~~~~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ 4 errors generated. -- return set_cpus_allowed_ptr(p, new_mask); ^ kernel/sched/core.c:3571:9: note: did you mean '__set_cpus_allowed_ptr'? kernel/sched/core.c:3567:19: note: '__set_cpus_allowed_ptr' declared here static inline int __set_cpus_allowed_ptr(struct task_struct *p, ^ retval = dl_task_check_affinity(p, new_mask); ^ kernel/sched/core.c:9369:13: warning: no previous prototype for function 'per_task_init' [-Wmissing-prototypes] void __init per_task_init(void) ^ kernel/sched/core.c:9369:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init per_task_init(void) ^ static 1 warning and 2 errors generated. -- In file included from arch/x86/kernel/cpu/resctrl/pseudo_lock.c:14: if (src->user_cpus_ptr) ~~~^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ if (src->user_cpus_ptr) ~~~^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ if (src->user_cpus_ptr) ~~~^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ include/linux/sched/affinity.h:38:11: error: incomplete definition of type 'struct task_struct' WARN_ON(p->user_cpus_ptr); ~^ include/asm-generic/bug.h:121:25: note: expanded from macro 'WARN_ON' int __ret_warn_on = !!(condition); \ ^~~~~~~~~ include/linux/sched/affinity.h:8:8: note: forward declaration of 'struct task_struct' struct task_struct; ^ In file included from arch/x86/kernel/cpu/resctrl/pseudo_lock.c:20: include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero] _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mman.h:136:21: note: expanded from macro '_calc_vm_trans' : ((x) & (bit1)) / ((bit1) / (bit2)))) ^ ~~~~~~~~~~~~~~~~~ 1 warning and 4 errors generated. vim +32 include/linux/sched/affinity.h 9 10 extern int cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial); 11 extern int task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed); 12 #ifdef CONFIG_SMP 13 extern void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask); 14 extern int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask); 15 extern int dup_user_cpus_ptr(struct task_struct *dst, struct task_struct *src, int node); 16 extern void release_user_cpus_ptr(struct task_struct *p); 17 extern int dl_task_check_affinity(struct task_struct *p, const struct cpumask *mask); 18 extern void force_compatible_cpus_allowed_ptr(struct task_struct *p); 19 extern void relax_compatible_cpus_allowed_ptr(struct task_struct *p); 20 #else 21 static inline void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) 22 { 23 } 24 static inline int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask) 25 { 26 if (!cpumask_test_cpu(0, new_mask)) 27 return -EINVAL; 28 return 0; 29 } 30 static inline int dup_user_cpus_ptr(struct task_struct *dst, struct task_struct *src, int node) 31 { 33 return -EINVAL; 34 return 0; 35 } 36 static inline void release_user_cpus_ptr(struct task_struct *p) 37 { 38 WARN_ON(p->user_cpus_ptr); 39 } 40 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org