tree: https://github.com/zen-kernel/zen-kernel 5.12/muqss head: a80522ac87ce290e80c283fa17988a4a0e57fd04 commit: 17886fe82995e8dbfe595e1d5de8717f3ffc73ed [9/16] Make hrtimer granularity and minimum hrtimeout configurable in sysctl. Set default granularity to 100us and min timeout to 500us. config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/zen-kernel/zen-kernel/commit/17886fe82995e8dbfe595e1d5... git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen-kernel-zen-kernel 5.12/muqss git checkout 17886fe82995e8dbfe595e1d5de8717f3ffc73ed # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: kernel/time/hrtimer.o: in function `schedule_min_hrtimeout': (.sched.text+0x978): undefined reference to `hrtimer_granularity_us' arm-linux-gnueabi-ld: kernel/trace/bpf_trace.o: in function `bpf_trace_run12': (.text+0x8b9c): undefined reference to `__cant_migrate' arm-linux-gnueabi-ld: kernel/trace/bpf_trace.o: in function `bpf_trace_run1': (.text+0x965c): undefined reference to `__cant_migrate' arm-linux-gnueabi-ld: kernel/trace/bpf_trace.o: in function `bpf_trace_run2': (.text+0xa288): undefined reference to `__cant_migrate' arm-linux-gnueabi-ld: kernel/trace/bpf_trace.o: in function `bpf_trace_run3': (.text+0xad9c): undefined reference to `__cant_migrate' arm-linux-gnueabi-ld: kernel/trace/bpf_trace.o: in function `bpf_trace_run4': (.text+0xb8bc): undefined reference to `__cant_migrate' arm-linux-gnueabi-ld: kernel/trace/bpf_trace.o:(.text+0xc3b4): more undefined references to `__cant_migrate' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org