Hi "Matthew, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on linux/master] [also build test ERROR on linus/master hnaz-linux-mm/master v5.12-rc6 next-20210407] [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] url: https://github.com/0day-ci/linux/commits/Matthew-Wilcox-Oracle/Add-split_... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e46d1b78a03d52306f21f77a4e4a144b6d31486 config: s390-randconfig-r016-20210407 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 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://github.com/0day-ci/linux/commit/31f96279760e4e4a2abf1d397e5c85fca... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Matthew-Wilcox-Oracle/Add-split_lock/20210408-132535 git checkout 31f96279760e4e4a2abf1d397e5c85fca955d908 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 >>): In file included from drivers/s390/cio/airq.c:21: arch/s390/include/asm/airq.h: In function 'airq_iv_lock': 75 | bit_spin_lock(bit ^ be_to_le, iv->bitlock); | ^~~~~~~~~~~~~ In file included from include/linux/mm.h:22, from include/linux/scatterlist.h:8, from include/linux/iommu.h:10, from arch/s390/include/asm/pci.h:7, from include/linux/pci.h:1823, from arch/s390/include/asm/hw_irq.h:6, from include/linux/irq.h:589, from drivers/s390/cio/airq.c:13: include/linux/bit_spinlock.h:17:20: note: declared here 17 | static inline void bit_spin_lock(int bitnum, unsigned long *addr, | ^~~~~~~~~~~~~ In file included from drivers/s390/cio/airq.c:21: arch/s390/include/asm/airq.h: In function 'airq_iv_unlock': 81 | bit_spin_unlock(bit ^ be_to_le, iv->bitlock); | ^~~~~~~~~~~~~~~ In file included from include/linux/mm.h:22, from include/linux/scatterlist.h:8, from include/linux/iommu.h:10, from arch/s390/include/asm/pci.h:7, from include/linux/pci.h:1823, from arch/s390/include/asm/hw_irq.h:6, from include/linux/irq.h:589, from drivers/s390/cio/airq.c:13: include/linux/bit_spinlock.h:50:20: note: declared here 50 | static inline void bit_spin_unlock(int bitnum, unsigned long *addr, | ^~~~~~~~~~~~~~~ vim +/bit_spin_lock +75 arch/s390/include/asm/airq.h a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 71 a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 72 static inline void airq_iv_lock(struct airq_iv *iv, unsigned long bit) a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 73 { a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 74 const unsigned long be_to_le = BITS_PER_LONG - 1; a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 @75 bit_spin_lock(bit ^ be_to_le, iv->bitlock); a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 76 } a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 77 a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 78 static inline void airq_iv_unlock(struct airq_iv *iv, unsigned long bit) a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 79 { a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 80 const unsigned long be_to_le = BITS_PER_LONG - 1; a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 @81 bit_spin_unlock(bit ^ be_to_le, iv->bitlock); a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 82 } a9a6f0341df9a6 Martin Schwidefsky 2013-06-25 83 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org