On Thu, Jan 28 2021 at 16:29, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git > locking/core > head: 997acaf6b4b59c6a9c259740312a69ea549cc684 > commit: 997acaf6b4b59c6a9c259740312a69ea549cc684 [10/10] lockdep: report > broken irq restoration > config: s390-randconfig-r035-20210128 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project > 48bdd676a1d1338c10541460bf5beb69ac17e451) > 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/tip/tip.git/commit/?id=997acaf6b4b59c6a9c259740312a69ea549cc684 > git remote add tip > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git > git fetch --no-tags tip locking/core > git checkout 997acaf6b4b59c6a9c259740312a69ea549cc684 > # 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 <l...@intel.com> > > All errors (new ones prefixed by >>): > > s390x-linux-gnu-ld: arch/s390/boot/sclp_early_core.o: in function > `sclp_early_cmd': >>> sclp_early_core.c:(.text+0x18c): undefined reference to >>> `warn_bogus_irq_restore' > 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' >>> s390x-linux-gnu-ld: sclp_early_core.c:(.text+0xa9a): undefined reference to >>> `warn_bogus_irq_restore'
That's S390 early boot code which lacks a stub function ....
