Hi Lai, kernel test robot noticed the following build errors: [auto build test ERROR on paulmck-rcu/dev] [also build test ERROR on tip/locking/core tip/sched/core tip/x86/asm tip/master linus/master v6.9-rc1 next-20240328] [cannot apply to tip/x86/core tip/auto-latest] [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/Lai-Jiangshan/lib-Use-rcu_preempt_depth-to-replace-current-rcu_read_lock_nesting/20240328-155513 base: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev patch link: https://lore.kernel.org/r/20240328075318.83039-11-jiangshanlai%40gmail.com patch subject: [PATCH 10/10] x86/rcu: Add THUNK rcu_read_unlock_special_thunk config: i386-alldefconfig (https://download.01.org/0day-ci/archive/20240329/202403292233.1m5tWJY5-lkp@xxxxxxxxx/config) compiler: gcc-12 (Ubuntu 12.3.0-9ubuntu2) 12.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240329/202403292233.1m5tWJY5-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202403292233.1m5tWJY5-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: init/main.o: in function `rest_init': >> main.c:(.ref.text+0x96): undefined reference to `rcu_read_unlock_special_thunk' >> ld: main.c:(.ref.text+0x9d): undefined reference to `rcu_read_unlock_special_thunk' ld: arch/x86/events/intel/ds.o: in function `intel_pmu_drain_bts_buffer': >> ds.c:(.text+0x2cd9): undefined reference to `rcu_read_unlock_special_thunk' ld: arch/x86/kernel/nmi.o: in function `nmi_handle': >> nmi.c:(.text+0x2e9): undefined reference to `rcu_read_unlock_special_thunk' ld: arch/x86/kernel/alternative.o: in function `__text_poke': >> alternative.c:(.text+0x531): undefined reference to `rcu_read_unlock_special_thunk' ld: arch/x86/mm/init.o:init.c:(.init.text+0xf1): more undefined references to `rcu_read_unlock_special_thunk' follow -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
