tree: https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.10 head: e14d4574ca81a569ee6d07e03271f2ae2dad38e4 commit: 4302b1e69c7e8d751f04a08592c5e2bfa7b12d4f [1686/1761] regulator: da9121: Sync with mainline version config: s390-randconfig-r012-20210812 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 767496d19cb9a1fbba57ff08095faa161998ee36) 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/Xilinx/linux-xlnx/commit/4302b1e69c7e8d751f04a08592c5e... git remote add xlnx https://github.com/Xilinx/linux-xlnx git fetch --no-tags xlnx xlnx_rebase_v5.10 git checkout 4302b1e69c7e8d751f04a08592c5e2bfa7b12d4f # 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 warnings (new ones prefixed by >>): In file included from include/linux/gpio/driver.h:7: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ ^ In file included from drivers/regulator/da9121-regulator.c:17: In file included from include/linux/of_gpio.h:14: In file included from include/linux/gpio/driver.h:7: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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: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 drivers/regulator/da9121-regulator.c:17: In file included from include/linux/of_gpio.h:14: In file included from include/linux/gpio/driver.h:7: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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: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 drivers/regulator/da9121-regulator.c:17: In file included from include/linux/of_gpio.h:14: In file included from include/linux/gpio/driver.h:7: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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:120:12: note: expanded from macro '__swab32' __fswab32(x)) ^ In file included from drivers/regulator/da9121-regulator.c:17: In file included from include/linux/of_gpio.h:14: In file included from include/linux/gpio/driver.h:7: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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); ~~~~~~~~~~ ^ static const struct of_device_id da9121_dt_ids[] = { ^ 21 warnings generated. vim +/da9121_dt_ids +1001 drivers/regulator/da9121-regulator.c 4c466d2eb34056 Raviteja Narayanam 2020-11-09 1000 4c466d2eb34056 Raviteja Narayanam 2020-11-09 @1001 static const struct of_device_id da9121_dt_ids[] = { 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1002 { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 }, 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1003 { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 }, 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1004 { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 }, 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1005 { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 }, 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1006 { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 }, 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1007 { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 }, 4302b1e69c7e8d Raviteja Narayanam 2021-05-10 1008 { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 }, 4c466d2eb34056 Raviteja Narayanam 2020-11-09 1009 { } 4c466d2eb34056 Raviteja Narayanam 2020-11-09 1010 }; 4c466d2eb34056 Raviteja Narayanam 2020-11-09 1011 MODULE_DEVICE_TABLE(of, da9121_dt_ids); 4c466d2eb34056 Raviteja Narayanam 2020-11-09 1012 :::::: The code at line 1001 was first introduced by commit :::::: 4c466d2eb340560878447bfc19c68310c1a5f292 drivers: regulator: Add driver for DA9121 family of devices :::::: TO: Raviteja Narayanam <raviteja.narayanam(a)xilinx.com&gt; :::::: CC: Michal Simek <michal.simek(a)xilinx.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org