tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: d2eeef58809494b0ea811ce578163de7a2478a22 commit: 0c8c2eaf12587ba14280b4e6388198d0183841ca [20/62] FROMLIST: ARM: dts: rockchip: Add marvell BT irq config config: s390-randconfig-r006-20200615 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) 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-s390-linux-gnu git checkout 0c8c2eaf12587ba14280b4e6388198d0183841ca # 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; Note: the chrome-os/chromeos-4.19 HEAD d2eeef58809494b0ea811ce578163de7a2478a22 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>, old ones prefixed by <<): ^ In file included from kernel/cgroup/cgroup.c:35: In file included from include/linux/init_task.h:17: In file included from include/net/net_namespace.h:36: In file included from include/linux/skbuff.h:34: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:79: include/asm-generic/io.h:499:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : ^ include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | ^ In file included from kernel/cgroup/cgroup.c:35: In file included from include/linux/init_task.h:17: In file included from include/net/net_namespace.h:36: In file included from include/linux/skbuff.h:34: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:79: include/asm-generic/io.h:499:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : ^ include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0xff000000UL) >> 24))) ^ In file included from kernel/cgroup/cgroup.c:35: In file included from include/linux/init_task.h:17: In file included from include/net/net_namespace.h:36: In file included from include/linux/skbuff.h:34: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:79: include/asm-generic/io.h:499:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32' __fswab32(x)) ^ In file included from kernel/cgroup/cgroup.c:35: In file included from include/linux/init_task.h:17: In file included from include/net/net_namespace.h:36: In file included from include/linux/skbuff.h:34: In file included from include/linux/dma-mapping.h:11: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:79: include/asm-generic/io.h:510:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:520:46: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew(cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:530:46: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel(cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:592:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:600:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:608:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:626:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:635:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ In file included from kernel/cgroup/cgroup.c:62: In file included from include/trace/events/cgroup.h:155: In file included from include/trace/define_trace.h:96: In file included from include/trace/trace_events.h:20: In file included from include/linux/trace_events.h:7: In file included from include/linux/trace_seq.h:5: include/linux/seq_buf.h:35:12: warning: assigning to 'char *' from 'unsigned char *' converts between pointers to integer types with different sign [-Wpointer-sign] s->buffer = buf; ^ ~~~ 35 warnings generated. /tmp/cgroup-195689.s: Assembler messages: /tmp/cgroup-195689.s:21410: Error: bad expression /tmp/cgroup-195689.s:21410: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:21532: Error: bad expression /tmp/cgroup-195689.s:21532: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:32678: Error: bad expression /tmp/cgroup-195689.s:32678: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:33209: Error: bad expression /tmp/cgroup-195689.s:33209: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:34634: Error: bad expression /tmp/cgroup-195689.s:34634: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:35006: Error: bad expression /tmp/cgroup-195689.s:35006: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:44152: Error: bad expression /tmp/cgroup-195689.s:44152: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:44729: Error: bad expression /tmp/cgroup-195689.s:44729: Error: junk at end of line, first unrecognized character is `r' /tmp/cgroup-195689.s:45850: Error: bad expression /tmp/cgroup-195689.s:45850: Error: junk at end of line, first unrecognized character is `r' clang-11: error: assembler command failed with exit code 1 (use -v to see invocation) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org