tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git modules/WIP head: f0d1d7d9b12e1f351715255a8569d2afde739a34 commit: 764e7a2977acd71af7da72e661b2152a5e9d4e4f [22/23] ftrace: Merge ftrace_module_{init,enable}() config: i386-allyesconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout 764e7a2977acd71af7da72e661b2152a5e9d4e4f # save the attached .config to linux build tree make ARCH=i386 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 <<): ld: kernel/module.o: in function `__ia32_sys_delete_module': ld: kernel/module.o: in function `load_module': module.c:(.text+0x58e0): undefined reference to `ftrace_module_release' ld: kernel/module.o: in function `do_init_module': module.c:(.text.unlikely+0x35f): undefined reference to `ftrace_module_release' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org