Hi Jing, Thank you for the patch! Yet something to improve: [auto build test ERROR on 39be2e28180a2e87af5fbb8d83643812e1a3b371] url: https://github.com/0day-ci/linux/commits/Jing-Zhang/Remove-duplicated-sta... base: 39be2e28180a2e87af5fbb8d83643812e1a3b371 config: s390-randconfig-r022-20210615 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) 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://github.com/0day-ci/linux/commit/2145147a4e85c8196c004804d103c1a3d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jing-Zhang/Remove-duplicated-stats-definitions-for-debugfs/20210616-151523 git checkout 2145147a4e85c8196c004804d103c1a3d7adeffe # 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 >>): In file included from arch/s390/kvm/kvm-s390.c:23: In file included from include/linux/kvm_host.h:35: In file included from include/linux/kvm_para.h:5: In file included from include/uapi/linux/kvm_para.h:37: In file included from arch/s390/include/asm/kvm_para.h:25: In file included from arch/s390/include/asm/diag.h:12: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from arch/s390/kvm/kvm-s390.c:23: In file included from include/linux/kvm_host.h:35: In file included from include/linux/kvm_para.h:5: In file included from include/uapi/linux/kvm_para.h:37: In file included from arch/s390/include/asm/kvm_para.h:25: In file included from arch/s390/include/asm/diag.h:12: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__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:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from arch/s390/kvm/kvm-s390.c:23: In file included from include/linux/kvm_host.h:35: In file included from include/linux/kvm_para.h:5: In file included from include/uapi/linux/kvm_para.h:37: In file included from arch/s390/include/asm/kvm_para.h:25: In file included from arch/s390/include/asm/diag.h:12: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: 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:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: 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:617:20: 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:625:20: 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:634:21: 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:643:21: 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:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ STATS_DESC_COUNTR(VM, inject_io), ^ STATS_DESC_COUNTR(VM, inject_io), ^ STATS_DESC_COUNTR(VM, inject_io), ^ arch/s390/kvm/kvm-s390.c:64:20: error: use of undeclared identifier 'VM' STATS_DESC_COUNTR(VM, inject_float_mchk), ^ STATS_DESC_COUNTR(VM, inject_float_mchk), ^ arch/s390/kvm/kvm-s390.c:65:20: error: use of undeclared identifier 'VM' STATS_DESC_COUNTR(VM, inject_pfault_done), ^ STATS_DESC_COUNTR(VM, inject_pfault_done), ^ arch/s390/kvm/kvm-s390.c:66:20: error: use of undeclared identifier 'VM' STATS_DESC_COUNTR(VM, inject_service_signal), ^ STATS_DESC_COUNTR(VM, inject_service_signal), ^ arch/s390/kvm/kvm-s390.c:67:20: error: use of undeclared identifier 'VM' STATS_DESC_COUNTR(VM, inject_virtio) ^ STATS_DESC_COUNTR(VM, inject_virtio) ^ static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE' #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) ^ include/linux/build_bug.h:77:50: note: expanded from macro 'static_assert' #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:78:56: note: expanded from macro '__static_assert' #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) ^~~~ arch/s390/kvm/kvm-s390.c:75:12: error: invalid application of 'sizeof' to an incomplete type 'struct _kvm_stats_desc []' .count = ARRAY_SIZE(kvm_vm_stats_desc), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE' #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) ^~~~~ arch/s390/kvm/kvm-s390.c:78:10: error: invalid application of 'sizeof' to an incomplete type 'struct _kvm_stats_desc []' sizeof(kvm_vm_stats_desc), ^~~~~~~~~~~~~~~~~~~ 12 warnings and 14 errors generated. vim +/STATS_DESC_COUNTR +63 arch/s390/kvm/kvm-s390.c 55 56 #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ 57 #define LOCAL_IRQS 32 58 #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ 59 (KVM_MAX_VCPUS + LOCAL_IRQS)) 60 61 struct _kvm_stats_desc kvm_vm_stats_desc[] = { 62 KVM_GENERIC_VM_STATS(), 68 }; 70 sizeof(struct kvm_vm_stat) / sizeof(u64)); 71 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org