tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git modules/WIP head: d4334fbbfc2d716f1e9f8002d51c40a681f047ba commit: 1a3729608e2468f1f559b7584281e4fe07e9c3ee [22/23] ftrace: Merge ftrace_module_{init,enable}() config: s390-randconfig-s002-20200519 (attached as .config) reproduce: # apt-get install sparse # sparse version: v0.6.1-193-gb8fad4bc-dirty git checkout 1a3729608e2468f1f559b7584281e4fe07e9c3ee # save the attached .config to linux build tree make C=1 ARCH=s390 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): s390-linux-ld: kernel/module.o: in function `__do_sys_delete_module': s390-linux-ld: kernel/module.o: in function `do_init_module': kernel/module.c:3641: undefined reference to `ftrace_module_release' s390-linux-ld: kernel/module.o: in function `load_module': kernel/module.c:3936: undefined reference to `ftrace_module_release' vim +1033 kernel/module.c 969 970 SYSCALL_DEFINE2(delete_module, const char __user *, name_user, 971 unsigned int, flags) 972 { 973 struct module *mod; 974 char name[MODULE_NAME_LEN]; 975 int ret, forced = 0; 976 977 if (!capable(CAP_SYS_MODULE) || modules_disabled) 978 return -EPERM; 979 980 if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) 981 return -EFAULT; 982 name[MODULE_NAME_LEN-1] = '\0'; 983 984 audit_log_kern_module(name); 985 986 if (mutex_lock_interruptible(&module_mutex) != 0) 987 return -EINTR; 988 989 mod = find_module(name); 990 if (!mod) { 991 ret = -ENOENT; 992 goto out; 993 } 994 995 if (!list_empty(&mod->source_list)) { 996 /* Other modules depend on us: get rid of them first. */ 997 ret = -EWOULDBLOCK; 998 goto out; 999 } 1000 1001 /* Doing init or already dying? */ 1002 if (mod->state != MODULE_STATE_LIVE) { 1003 /* FIXME: if (force), slam module count damn the torpedoes */ 1004 pr_debug("%s already dying\n", mod->name); 1005 ret = -EBUSY; 1006 goto out; 1007 } 1008 1009 /* If it has an init func, it must have an exit func to unload */ 1010 if (mod->init && !mod->exit) { 1011 forced = try_force_unload(flags); 1012 if (!forced) { 1013 /* This module can't be removed */ 1014 ret = -EBUSY; 1015 goto out; 1016 } 1017 } 1018 1019 /* Stop the machine so refcounts can't move and disable module. */ 1020 ret = try_stop_module(mod, flags, &forced); 1021 if (ret != 0) 1022 goto out; 1023 1024 mutex_unlock(&module_mutex); 1025 /* Final destruction now no one is using it. */ 1026 if (mod->exit != NULL) 1027 mod->exit(); 1028 blocking_notifier_call_chain(&module_notify_list, 1029 MODULE_STATE_GOING, mod); 1030 klp_module_going(mod); 1031 blocking_notifier_call_chain(&module_notify_list, 1032 MODULE_STATE_GONE, mod); 1034 1035 async_synchronize_full(); 1036 1037 /* Store the name of the last unloaded module for diagnostic purposes */ 1038 strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); 1039 1040 free_module(mod); 1041 /* someone could wait for the module in add_unformed_module() */ 1042 wake_up_all(&module_wq); 1043 return 0; 1044 out: 1045 mutex_unlock(&module_mutex); 1046 return ret; 1047 } 1048 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org