tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/module head: b35af90d7fadf374ae145713872d354b02f23125 commit: 58083deac365c2b72e52ba993b5754e4aee167b0 [3/5] x86,module: Detect VMX vs SLD conflicts config: um-defconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout 58083deac365c2b72e52ba993b5754e4aee167b0 # save the attached .config to linux build tree make ARCH=um 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 <<): /usr/bin/ld: arch/x86/um/../kernel/module.o: in function `decode_module': module.c:(.text+0x25): undefined reference to `split_lock_enabled' /usr/bin/ld: module.c:(.text+0x37): undefined reference to `insn_init' /usr/bin/ld: module.c:(.text+0x69): undefined reference to `insn_get_length' /usr/bin/ld: module.c:(.text+0x14e): undefined reference to `insn_get_prefixes' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org