tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 8d63ee602da381c437c0a4ef7ea882b71d829eb6 commit: 01dbe7129d9ccd5fe940897888645f06327b34ff [7/16] sfc: falcon: Search VPD with pci_vpd_find_ro_info_keyword() config: riscv-randconfig-r014-20210822 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 79b55e5038324e61a3abf4e6a9a949c473edd858) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit... git remote add net-next https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git git fetch --no-tags net-next master git checkout 01dbe7129d9ccd5fe940897888645f06327b34ff # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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/net/ethernet/sfc/falcon/efx.c:9: In file included from include/linux/pci.h:38: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: 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/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from drivers/net/ethernet/sfc/falcon/efx.c:9: In file included from include/linux/pci.h:38: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: 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/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from drivers/net/ethernet/sfc/falcon/efx.c:9: In file included from include/linux/pci.h:38: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: 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:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ drivers/net/ethernet/sfc/falcon/efx.c:2792:13: error: implicit declaration of function 'pci_vpd_alloc' [-Werror,-Wimplicit-function-declaration] vpd_data = pci_vpd_alloc(dev, &vpd_size); ^ drivers/net/ethernet/sfc/falcon/efx.c:2792:11: warning: incompatible integer to pointer conversion assigning to 'u8 *' (aka 'unsigned char *') from 'int' [-Wint-conversion] vpd_data = pci_vpd_alloc(dev, &vpd_size); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size, ^ drivers/net/ethernet/sfc/falcon/efx.c:2798:10: note: did you mean 'pci_vpd_find_info_keyword'? include/linux/pci.h:2349:5: note: 'pci_vpd_find_info_keyword' declared here int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, ^ 8 warnings and 2 errors generated. vim +/pci_vpd_find_ro_info_keyword +2798 drivers/net/ethernet/sfc/falcon/efx.c 2781 2782 /* NIC VPD information 2783 * Called during probe to display the part number of the installed NIC. 2784 */ 2785 static void ef4_probe_vpd_strings(struct ef4_nic *efx) 2786 { 2787 struct pci_dev *dev = efx->pci_dev; 2788 unsigned int vpd_size, kw_len; 2789 u8 *vpd_data; 2790 int start; 2791 2792 vpd_data = pci_vpd_alloc(dev, &vpd_size); 2793 if (IS_ERR(vpd_data)) { 2794 pci_warn(dev, "Unable to read VPD\n"); 2795 return; 2796 } 2797 2799 PCI_VPD_RO_KEYWORD_PARTNO, &kw_len); 2800 if (start < 0) 2801 pci_warn(dev, "Part number not found or incomplete\n"); 2802 else 2803 pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start); 2804 2805 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size, 2806 PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len); 2807 if (start < 0) 2808 pci_warn(dev, "Serial number not found or incomplete\n"); 2809 else 2810 efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL); 2811 2812 kfree(vpd_data); 2813 } 2814 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org