tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers head: 4c707c1c0de83967079b4e385012fa5b00e2cd11 commit: 358c0016c619cb96065fc10b25be736053481392 [195/2384] headers/deps: kcsan: Move task_struct::kcsan_ctx to per_task() config: x86_64-randconfig-c007 (https://download.01.org/0day-ci/archive/20220117/202201170819.f8ENBRJK-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c63a3175c2947e8c1a2d3bbe16a8586600705c54) 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 358c0016c619cb96065fc10b25be736053481392 # 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=x86_64 SHELL=/bin/bash 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 >>): init/main.c:790:20: warning: no previous prototype for function 'mem_encrypt_init' [-Wmissing-prototypes] void __init __weak mem_encrypt_init(void) { } ^ init/main.c:790:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init __weak mem_encrypt_init(void) { } ^ static per_task(&init_task, kcsan_ctx).scoped_addresses.next = LIST_POISON1; ^~~~~~~~~~~~~~~~ scoped_accesses include/linux/kcsan.h:55:19: note: 'scoped_accesses' declared here struct list_head scoped_accesses; ^ init/main.c:891:13: warning: no previous prototype for function 'init_per_task_early' [-Wmissing-prototypes] void __init init_per_task_early(void) ^ init/main.c:891:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init init_per_task_early(void) ^ static 2 warnings and 1 error generated. vim +947 init/main.c 890 891 void __init init_per_task_early(void) 892 { 893 #ifdef CONFIG_POSIX_TIMERS 894 per_task(&init_task, posix_cputimers) = (struct posix_cputimers) __INIT_CPU_TIMERS(init_task); 895 #endif 896 task_thread(&init_task) = (struct thread_struct) INIT_THREAD; 897 898 INIT_LIST_HEAD(&per_task(&init_task, rt).run_list); 899 per_task(&init_task, rt).time_slice = RR_TIMESLICE; 900 901 INIT_LIST_HEAD(&per_task(&init_task, se).group_node); 902 903 per_task(&init_task, stack) = init_stack; 904 905 refcount_set(&per_task(&init_task, usage), 2); 906 #ifdef CONFIG_THREAD_INFO_IN_TASK 907 refcount_set(&per_task(&init_task, stack_refcount), 1); 908 #endif 909 #ifdef CONFIG_CGROUP_SCHED 910 per_task(&init_task, sched_task_group) = &root_task_group; 911 #endif 912 #ifdef CONFIG_TASKS_RCU 913 per_task(&init_task, rcu_tasks_idle_cpu) = -1; 914 INIT_LIST_HEAD(&per_task(&init_task, rcu_tasks_holdout_list)); 915 #endif 916 #ifdef CONFIG_CPUSETS 917 per_task(&init_task, mems_allowed_seq) = (seqcount_spinlock_t) SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, 918 &per_task(&init_task, alloc_lock)); 919 #endif 920 per_task(&init_task, restart_block).fn = do_no_restart_syscall; 921 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 922 seqcount_init(&per_task(&init_task, vtime).seqcount); 923 per_task(&init_task, vtime).state = VTIME_SYS; 924 #endif 925 #ifdef CONFIG_PERF_EVENTS 926 mutex_init(&per_task(&init_task, perf_event_mutex)); 927 INIT_LIST_HEAD(&per_task(&init_task, perf_event_list)); 928 #endif 929 #ifdef CONFIG_SMP 930 plist_node_init(&per_task(&init_task, pushable_tasks), MAX_PRIO); 931 #endif 932 #ifdef CONFIG_AUDIT 933 per_task(&init_task, loginuid) = INVALID_UID; 934 #endif 935 per_task(&init_task, cpus_mask) = CPU_MASK_ALL; 936 per_task(&init_task, cpus_ptr) = &per_task(&init_task, cpus_mask); 937 INIT_LIST_HEAD(&per_task(&init_task, pending).list); 938 #ifdef CONFIG_RT_MUTEXES 939 per_task(&init_task, pi_waiters) = RB_ROOT_CACHED; 940 #endif 941 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 942 raw_spin_lock_init(&per_task(&init_task, prev_cputime).lock); 943 #endif 944 spin_lock_init(&per_task(&init_task, alloc_lock)); 945 raw_spin_lock_init(&per_task(&init_task, pi_lock)); 946 #ifdef CONFIG_KCSAN 948 #endif 949 } 950 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org