tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 49afce6d47fe05ee01f1a41129b835fe4cca7eea commit: 0b0617e5a610fe12b3e6ecd9d64b107dbd24a9ee [6920/8210] ARM: 8918/1: only build return_address() if needed config: arm-bcm2835_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 0b0617e5a610fe12b3e6ecd9d64b107dbd24a9ee # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/trace/trace_sched_wakeup.o: In function `probe_wakeup': trace_sched_wakeup.c:(.text+0x7a0): undefined reference to `return_address' kernel/trace/trace_sched_wakeup.o: In function `probe_wakeup_sched_switch': trace_sched_wakeup.c:(.text+0x874): undefined reference to `return_address' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation