tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git modules/WIP head: 5d1d829c46e1fc74ab3cfbaec73ca14e2bbf3642 commit: 7e54f0ea9397718057e43653496fc89fd42b986e [21/22] ftrace: Merge ftrace_module_{init,enable}() config: x86_64-lkp (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 7e54f0ea9397718057e43653496fc89fd42b986e # save the attached .config to linux build tree make W=1 ARCH=x86_64 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 >>): ld: kernel/module.o: in function `__do_sys_delete_module': ld: kernel/module.o: in function `do_init_module': kernel/module.c:3670: undefined reference to `ftrace_module_release' ld: kernel/module.o: in function `load_module': kernel/module.c:3965: undefined reference to `ftrace_module_release' vim +1036 kernel/module.c 972 973 SYSCALL_DEFINE2(delete_module, const char __user *, name_user, 974 unsigned int, flags) 975 { 976 struct module *mod; 977 char name[MODULE_NAME_LEN]; 978 int ret, forced = 0; 979 980 if (!capable(CAP_SYS_MODULE) || modules_disabled) 981 return -EPERM; 982 983 if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) 984 return -EFAULT; 985 name[MODULE_NAME_LEN-1] = '\0'; 986 987 audit_log_kern_module(name); 988 989 if (mutex_lock_interruptible(&module_mutex) != 0) 990 return -EINTR; 991 992 mod = find_module(name); 993 if (!mod) { 994 ret = -ENOENT; 995 goto out; 996 } 997 998 if (!list_empty(&mod->source_list)) { 999 /* Other modules depend on us: get rid of them first. */ 1000 ret = -EWOULDBLOCK; 1001 goto out; 1002 } 1003 1004 /* Doing init or already dying? */ 1005 if (mod->state != MODULE_STATE_LIVE) { 1006 /* FIXME: if (force), slam module count damn the torpedoes */ 1007 pr_debug("%s already dying\n", mod->name); 1008 ret = -EBUSY; 1009 goto out; 1010 } 1011 1012 /* If it has an init func, it must have an exit func to unload */ 1013 if (mod->init && !mod->exit) { 1014 forced = try_force_unload(flags); 1015 if (!forced) { 1016 /* This module can't be removed */ 1017 ret = -EBUSY; 1018 goto out; 1019 } 1020 } 1021 1022 /* Stop the machine so refcounts can't move and disable module. */ 1023 ret = try_stop_module(mod, flags, &forced); 1024 if (ret != 0) 1025 goto out; 1026 1027 mutex_unlock(&module_mutex); 1028 /* Final destruction now no one is using it. */ 1029 if (mod->exit != NULL) 1030 mod->exit(); 1031 blocking_notifier_call_chain(&module_notify_list, 1032 MODULE_STATE_GOING, mod); 1033 klp_module_going(mod); 1034 blocking_notifier_call_chain(&module_notify_list, 1035 MODULE_STATE_GONE, mod); 1037 1038 async_synchronize_full(); 1039 1040 /* Store the name of the last unloaded module for diagnostic purposes */ 1041 strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); 1042 1043 free_module(mod); 1044 /* someone could wait for the module in add_unformed_module() */ 1045 wake_up_all(&module_wq); 1046 return 0; 1047 out: 1048 mutex_unlock(&module_mutex); 1049 return ret; 1050 } 1051 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org