tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2021.07.27b
head:   11e66439ec35a4e59ab0bafdc33b56f395cc3b49
commit: 32cf354ee4ee0de2f8869d5b579bd3eed27ec7c2 [31/57] EXP: cpu: Convert timings from jiffies to ktime_get_mono_fast_ns()
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=32cf354ee4ee0de2f8869d5b579bd3eed27ec7c2
        git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
        git fetch --no-tags rcu dev.2021.07.27b
        git checkout 32cf354ee4ee0de2f8869d5b579bd3eed27ec7c2
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 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@intel.com>

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: kernel/cpu.o: in function `cpuhp_invoke_callback':
>> cpu.c:(.text+0x1860): undefined reference to `__aeabi_uldivmod'
>> arm-linux-gnueabi-ld: cpu.c:(.text+0x18c0): undefined reference to `__aeabi_uldivmod'
   arm-linux-gnueabi-ld: cpu.c:(.text+0x19f0): undefined reference to `__aeabi_uldivmod'
   arm-linux-gnueabi-ld: cpu.c:(.text+0x1c90): undefined reference to `__aeabi_uldivmod'
   arm-linux-gnueabi-ld: kernel/cpu.o: in function `cpuhp_up_callbacks':
   cpu.c:(.text+0x21f0): undefined reference to `__aeabi_uldivmod'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org