Hi Andy, I love your patch! Yet something to improve: [auto build test ERROR on balbi-usb/next] [also build test ERROR on mkp-scsi/for-next linus/master asm-generic/master v5.6-rc5 next-20200312] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/asm-generic-Prov... base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next config: s390-randconfig-a001-20200312 (attached as .config) compiler: s390-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from ./arch/s390/include/generated/asm/unaligned.h:1, from lib/decompress_unlz4.c:19: include/asm-generic/unaligned.h: In function 'get_unaligned_be24': 51 | return (u32)p[0] << 16 | (u32)p[1] << 8 | (u32)p[2]; | ^ | up include/asm-generic/unaligned.h:51:14: note: each undeclared identifier is reported only once for each function it appears in -- In file included from ./arch/s390/include/generated/asm/unaligned.h:1, from lib/sha1.c:13: include/asm-generic/unaligned.h: In function 'get_unaligned_be24': 51 | return (u32)p[0] << 16 | (u32)p[1] << 8 | (u32)p[2]; | ^ include/asm-generic/unaligned.h:51:14: note: each undeclared identifier is reported only once for each function it appears in vim +/p +51 include/asm-generic/unaligned.h 48 49 static inline u32 get_unaligned_be24(const u8 *buf) 50 { 52 } 53 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org