tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/core head: 16e3771198641cfafced3a439f7a4a9e884d3c10 commit: 16e3771198641cfafced3a439f7a4a9e884d3c10 [10/10] lockdep: report broken irq restoration config: s390-randconfig-r032-20210114 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6077d55381a6aa3e947ef7abdc36a7515c598c8a) 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 # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue locking/core git checkout 16e3771198641cfafced3a439f7a4a9e884d3c10 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 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 >>): s390x-linux-gnu-ld: arch/s390/boot/sclp_early_core.o: in function `sclp_early_cmd': s390x-linux-gnu-ld: arch/s390/boot/sclp_early_core.o: in function `sclp_early_set_event_mask': sclp_early_core.c:(.text+0x376): undefined reference to `warn_bogus_irq_restore' s390x-linux-gnu-ld: arch/s390/boot/sclp_early_core.o: in function `__sclp_early_printk': sclp_early_core.c:(.text+0xa90): undefined reference to `warn_bogus_irq_restore' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org