Hi Zqiang, Thank you for the patch! Yet something to improve: [auto build test ERROR on paulmck-rcu/dev] [also build test ERROR on next-20230209] [cannot apply to linus/master v6.2-rc7] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Zqiang/rcu-Keeping-rcu-related-kthreads-running-on-housekeeping-CPUS/20230209-182311 base: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev patch link: https://lore.kernel.org/r/20230209102730.974465-1-qiang1.zhang%40intel.com patch subject: [PATCH v2] rcu: Keeping rcu-related kthreads running on housekeeping CPUS config: arc-randconfig-r024-20230209 (https://download.01.org/0day-ci/archive/20230209/202302092018.kI8rty7k-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 12.1.0 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/intel-lab-lkp/linux/commit/af15a3ade363b21d823918088623f8564cbd9d08 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Zqiang/rcu-Keeping-rcu-related-kthreads-running-on-housekeeping-CPUS/20230209-182311 git checkout af15a3ade363b21d823918088623f8564cbd9d08 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202302092018.kI8rty7k-lkp@xxxxxxxxx All errors (new ones prefixed by >>): arc-elf-ld: kernel/rcu/srcutiny.o: in function `rcu_kthread_setaffinity': >> srcutiny.c:(.text+0x35c): multiple definition of `rcu_kthread_setaffinity'; kernel/rcu/update.o:update.c:(.text+0x204): first defined here arc-elf-ld: kernel/rcu/tiny.o: in function `rcu_kthread_setaffinity': tiny.c:(.text+0x164): multiple definition of `rcu_kthread_setaffinity'; kernel/rcu/update.o:update.c:(.text+0x204): first defined here -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
