tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git modules/WIP head: 65d09e3e7c7d4248e4695f27ae0c12fe63e1c45e commit: ed632ce9e1b239cfbf4da24d8a40b997ab6ffdbb [23/24] ftrace: Merge ftrace_module_{init,enable}() config: x86_64-rhel (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout ed632ce9e1b239cfbf4da24d8a40b997ab6ffdbb # save the attached .config to linux build tree make ARCH=x86_64 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 >>): ld: kernel/module.o: in function `__do_sys_delete_module': kernel/module.c:1033: undefined reference to `ftrace_module_release' ld: kernel/module.o: in function `load_module': kernel/module.c:3936: undefined reference to `ftrace_module_release' ld: kernel/module.o: in function `do_init_module': kernel/module.c:3641: 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