Hi Matti, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on a38fd8748464831584a19438cbb3082b5a2dab15] url: https://github.com/0day-ci/linux/commits/Matti-Vaittinen/Extend-regulator... base: a38fd8748464831584a19438cbb3082b5a2dab15 config: riscv-randconfig-r032-20210309 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project cd9a69289c7825d54450cb6829fef2c8e0f1963a) 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://github.com/0day-ci/linux/commit/a14d17e4af6d54f4808dff28bf4e8b947... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Matti-Vaittinen/Extend-regulator-notification-support/20210310-211246 git checkout a14d17e4af6d54f4808dff28bf4e8b9471fdf81e # 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 include/linux/hardirq.h:10: 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:149: include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return inw(addr); ^~~~~~~~~ arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw' #define inw(c) ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu' #define readw_cpu(c) ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; }) ^ 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/regulator/stpmic1_regulator.c:5: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: 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:149: include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return inl(addr); ^~~~~~~~~ arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl' #define inl(c) ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu' #define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; }) ^ 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/regulator/stpmic1_regulator.c:5: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: 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:149: include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] outb(value, addr); ^~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb' #define outb(v,c) ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu' #define writeb_cpu(v, c) ((void)__raw_writeb((v), (c))) ^ In file included from drivers/regulator/stpmic1_regulator.c:5: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: 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:149: include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] outw(value, addr); ^~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw' #define outw(v,c) ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu' #define writew_cpu(v, c) ((void)__raw_writew((__force u16)cpu_to_le16(v), (c))) ^ In file included from drivers/regulator/stpmic1_regulator.c:5: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: 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:149: include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] outl(value, addr); ^~~~~~~~~~~~~~~~~ arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl' #define outl(v,c) ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) ~~~~~~~~~~ ^ arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu' #define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c))) ^ In file included from drivers/regulator/stpmic1_regulator.c:5: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:10: 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:149: include/asm-generic/io.h:1005:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ .set_over_current_protection = stpmic1_set_icc, ^~~~~~~~~~~~~~~ drivers/regulator/stpmic1_regulator.c:152:33: error: incompatible function pointer types initializing 'int (*)(struct regulator_dev *, int, int, bool)' (aka 'int (*)(struct regulator_dev *, int, int, _Bool)') with an expression of type 'int (struct regulator_dev *)' [-Werror,-Wincompatible-function-pointer-types] .set_over_current_protection = stpmic1_set_icc, ^~~~~~~~~~~~~~~ drivers/regulator/stpmic1_regulator.c:159:33: error: incompatible function pointer types initializing 'int (*)(struct regulator_dev *, int, int, bool)' (aka 'int (*)(struct regulator_dev *, int, int, _Bool)') with an expression of type 'int (struct regulator_dev *)' [-Werror,-Wincompatible-function-pointer-types] .set_over_current_protection = stpmic1_set_icc, ^~~~~~~~~~~~~~~ drivers/regulator/stpmic1_regulator.c:173:33: error: incompatible function pointer types initializing 'int (*)(struct regulator_dev *, int, int, bool)' (aka 'int (*)(struct regulator_dev *, int, int, _Bool)') with an expression of type 'int (struct regulator_dev *)' [-Werror,-Wincompatible-function-pointer-types] .set_over_current_protection = stpmic1_set_icc, ^~~~~~~~~~~~~~~ drivers/regulator/stpmic1_regulator.c:186:33: error: incompatible function pointer types initializing 'int (*)(struct regulator_dev *, int, int, bool)' (aka 'int (*)(struct regulator_dev *, int, int, _Bool)') with an expression of type 'int (struct regulator_dev *)' [-Werror,-Wincompatible-function-pointer-types] .set_over_current_protection = stpmic1_set_icc, ^~~~~~~~~~~~~~~ drivers/regulator/stpmic1_regulator.c:193:33: error: incompatible function pointer types initializing 'int (*)(struct regulator_dev *, int, int, bool)' (aka 'int (*)(struct regulator_dev *, int, int, _Bool)') with an expression of type 'int (struct regulator_dev *)' [-Werror,-Wincompatible-function-pointer-types] .set_over_current_protection = stpmic1_set_icc, ^~~~~~~~~~~~~~~ drivers/regulator/stpmic1_regulator.c:494:12: error: conflicting types for 'stpmic1_set_icc' static int stpmic1_set_icc(struct regulator_dev *rdev, int lim, int severity, ^ drivers/regulator/stpmic1_regulator.c:35:12: note: previous declaration is here static int stpmic1_set_icc(struct regulator_dev *rdev); ^ 7 warnings and 7 errors generated. vim +139 drivers/regulator/stpmic1_regulator.c ca55b7185b74e7 pascal paillet 2018-10-08 130 7c027c66f2b529 Axel Lin 2019-01-23 131 static const struct regulator_ops stpmic1_ldo_ops = { ca55b7185b74e7 pascal paillet 2018-10-08 132 .list_voltage = regulator_list_voltage_linear_range, ca55b7185b74e7 pascal paillet 2018-10-08 133 .map_voltage = regulator_map_voltage_linear_range, ca55b7185b74e7 pascal paillet 2018-10-08 134 .is_enabled = regulator_is_enabled_regmap, ca55b7185b74e7 pascal paillet 2018-10-08 135 .enable = regulator_enable_regmap, ca55b7185b74e7 pascal paillet 2018-10-08 136 .disable = regulator_disable_regmap, ca55b7185b74e7 pascal paillet 2018-10-08 137 .get_voltage_sel = regulator_get_voltage_sel_regmap, ca55b7185b74e7 pascal paillet 2018-10-08 138 .set_voltage_sel = regulator_set_voltage_sel_regmap, ca55b7185b74e7 pascal paillet 2018-10-08 @139 .set_over_current_protection = stpmic1_set_icc, ca55b7185b74e7 pascal paillet 2018-10-08 140 }; ca55b7185b74e7 pascal paillet 2018-10-08 141 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org