Hi Jing, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 9f242010c3b46e63bc62f08fff42cef992d3801b] url: https://github.com/0day-ci/linux/commits/Jing-Zhang/KVM-statistics-data-fd-based-binary-interface/20210430-043830 base: 9f242010c3b46e63bc62f08fff42cef992d3801b config: s390-randconfig-r024-20210429 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439) 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/434cb14317623e9908098fc1c3925f2a6dcaa556 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jing-Zhang/KVM-statistics-data-fd-based-binary-interface/20210430-043830 git checkout 434cb14317623e9908098fc1c3925f2a6dcaa556 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from arch/s390/kvm/kvm-s390.c:23: In file included from include/linux/kvm_host.h:33: 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:80: 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:33: 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:80: 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:33: 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:80: 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); ~~~~~~~~~~ ^ >> arch/s390/kvm/kvm-s390.c:154:21: warning: initializer-string for char array is too long [-Wexcess-initializers] STATS_DESC_COUNTER("instruction_sigp_stop_store_status"), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kvm_host.h:1241:24: note: expanded from macro 'STATS_DESC_COUNTER' STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_NONE, \ ^~~~ include/linux/kvm_host.h:1235:13: note: expanded from macro 'STATS_DESC_CUMULATIVE' STATS_DESC(name, KVM_STATS_TYPE_CUMULATIVE, unit, scale, exponent) ^~~~ include/linux/kvm_host.h:1232:39: note: expanded from macro 'STATS_DESC' {type | unit | scale, exponent, 1}, name, \ ^~~~ arch/s390/kvm/kvm-s390.c:156:21: warning: initializer-string for char array is too long [-Wexcess-initializers] STATS_DESC_COUNTER("instruction_sigp_store_adtl_status"), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kvm_host.h:1241:24: note: expanded from macro 'STATS_DESC_COUNTER' STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_NONE, \ ^~~~ include/linux/kvm_host.h:1235:13: note: expanded from macro 'STATS_DESC_CUMULATIVE' STATS_DESC(name, KVM_STATS_TYPE_CUMULATIVE, unit, scale, exponent) ^~~~ include/linux/kvm_host.h:1232:39: note: expanded from macro 'STATS_DESC' {type | unit | scale, exponent, 1}, name, \ ^~~~ 14 warnings generated. vim +154 arch/s390/kvm/kvm-s390.c 77 78 struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { 79 STATS_VCPU_COMMON, 80 STATS_DESC_COUNTER("exit_userspace"), 81 STATS_DESC_COUNTER("exit_null"), 82 STATS_DESC_COUNTER("exit_external_request"), 83 STATS_DESC_COUNTER("exit_io_request"), 84 STATS_DESC_COUNTER("exit_external_interrupt"), 85 STATS_DESC_COUNTER("exit_stop_request"), 86 STATS_DESC_COUNTER("exit_validity"), 87 STATS_DESC_COUNTER("exit_instruction"), 88 STATS_DESC_COUNTER("exit_pei"), 89 STATS_DESC_COUNTER("halt_no_poll_steal"), 90 STATS_DESC_COUNTER("instruction_lctl"), 91 STATS_DESC_COUNTER("instruction_lctlg"), 92 STATS_DESC_COUNTER("instruction_stctl"), 93 STATS_DESC_COUNTER("instruction_stctg"), 94 STATS_DESC_COUNTER("exit_program_interruption"), 95 STATS_DESC_COUNTER("exit_instr_and_program"), 96 STATS_DESC_COUNTER("exit_operation_exception"), 97 STATS_DESC_COUNTER("deliver_ckc"), 98 STATS_DESC_COUNTER("deliver_cputm"), 99 STATS_DESC_COUNTER("deliver_external_call"), 100 STATS_DESC_COUNTER("deliver_emergency_signal"), 101 STATS_DESC_COUNTER("deliver_service_signal"), 102 STATS_DESC_COUNTER("deliver_virtio"), 103 STATS_DESC_COUNTER("deliver_stop_signal"), 104 STATS_DESC_COUNTER("deliver_prefix_signal"), 105 STATS_DESC_COUNTER("deliver_restart_signal"), 106 STATS_DESC_COUNTER("deliver_program"), 107 STATS_DESC_COUNTER("deliver_io"), 108 STATS_DESC_COUNTER("deliver_machine_check"), 109 STATS_DESC_COUNTER("exit_wait_state"), 110 STATS_DESC_COUNTER("inject_ckc"), 111 STATS_DESC_COUNTER("inject_cputm"), 112 STATS_DESC_COUNTER("inject_external_call"), 113 STATS_DESC_COUNTER("inject_emergency_signal"), 114 STATS_DESC_COUNTER("inject_mchk"), 115 STATS_DESC_COUNTER("inject_pfault_init"), 116 STATS_DESC_COUNTER("inject_program"), 117 STATS_DESC_COUNTER("inject_restart"), 118 STATS_DESC_COUNTER("inject_set_prefix"), 119 STATS_DESC_COUNTER("inject_stop_signal"), 120 STATS_DESC_COUNTER("instruction_epsw"), 121 STATS_DESC_COUNTER("instruction_gs"), 122 STATS_DESC_COUNTER("instruction_io_other"), 123 STATS_DESC_COUNTER("instruction_lpsw"), 124 STATS_DESC_COUNTER("instruction_lpswe"), 125 STATS_DESC_COUNTER("instruction_pfmf"), 126 STATS_DESC_COUNTER("instruction_ptff"), 127 STATS_DESC_COUNTER("instruction_sck"), 128 STATS_DESC_COUNTER("instruction_sckpf"), 129 STATS_DESC_COUNTER("instruction_stidp"), 130 STATS_DESC_COUNTER("instruction_spx"), 131 STATS_DESC_COUNTER("instruction_stpx"), 132 STATS_DESC_COUNTER("instruction_stap"), 133 STATS_DESC_COUNTER("instruction_iske"), 134 STATS_DESC_COUNTER("instruction_ri"), 135 STATS_DESC_COUNTER("instruction_rrbe"), 136 STATS_DESC_COUNTER("instruction_sske"), 137 STATS_DESC_COUNTER("instruction_ipte_interlock"), 138 STATS_DESC_COUNTER("instruction_stsi"), 139 STATS_DESC_COUNTER("instruction_stfl"), 140 STATS_DESC_COUNTER("instruction_tb"), 141 STATS_DESC_COUNTER("instruction_tpi"), 142 STATS_DESC_COUNTER("instruction_tprot"), 143 STATS_DESC_COUNTER("instruction_tsch"), 144 STATS_DESC_COUNTER("instruction_sie"), 145 STATS_DESC_COUNTER("instruction_essa"), 146 STATS_DESC_COUNTER("instruction_sthyi"), 147 STATS_DESC_COUNTER("instruction_sigp_sense"), 148 STATS_DESC_COUNTER("instruction_sigp_sense_running"), 149 STATS_DESC_COUNTER("instruction_sigp_external_call"), 150 STATS_DESC_COUNTER("instruction_sigp_emergency"), 151 STATS_DESC_COUNTER("instruction_sigp_cond_emergency"), 152 STATS_DESC_COUNTER("instruction_sigp_start"), 153 STATS_DESC_COUNTER("instruction_sigp_stop"), > 154 STATS_DESC_COUNTER("instruction_sigp_stop_store_status"), 155 STATS_DESC_COUNTER("instruction_sigp_store_status"), 156 STATS_DESC_COUNTER("instruction_sigp_store_adtl_status"), 157 STATS_DESC_COUNTER("instruction_sigp_arch"), 158 STATS_DESC_COUNTER("instruction_sigp_prefix"), 159 STATS_DESC_COUNTER("instruction_sigp_restart"), 160 STATS_DESC_COUNTER("instruction_sigp_init_cpu_reset"), 161 STATS_DESC_COUNTER("instruction_sigp_cpu_reset"), 162 STATS_DESC_COUNTER("instruction_sigp_unknown"), 163 STATS_DESC_COUNTER("diagnose_10"), 164 STATS_DESC_COUNTER("diagnose_44"), 165 STATS_DESC_COUNTER("diagnose_9c"), 166 STATS_DESC_COUNTER("diagnose_9c_ignored"), 167 STATS_DESC_COUNTER("diagnose_258"), 168 STATS_DESC_COUNTER("diagnose_308"), 169 STATS_DESC_COUNTER("diagnose_500"), 170 STATS_DESC_COUNTER("diagnose_other"), 171 STATS_DESC_COUNTER("pfault_sync"), 172 }; 173 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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