Hi Ye, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on lee-mfd/for-mfd-next] [also build test WARNING on lee-mfd/for-mfd-fixes wsa/i2c/for-next broonie-spi/for-next linus/master v6.2-rc8 next-20230217] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ye-Xiang/mfd-Add-support-for-Intel-LJCA-device/20230220-023253 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next patch link: https://lore.kernel.org/r/20230219183059.1029525-4-xiang.ye%40intel.com patch subject: [PATCH 3/5] i2c: Add support for Intel LJCA USB I2C driver config: hexagon-randconfig-r016-20230220 (https://download.01.org/0day-ci/archive/20230220/202302200400.mEwj4pGt-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f) 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 # https://github.com/intel-lab-lkp/linux/commit/9faeca641d7d776bbd8158b606a77830eddde590 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Ye-Xiang/mfd-Add-support-for-Intel-LJCA-device/20230220-023253 git checkout 9faeca641d7d776bbd8158b606a77830eddde590 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/i2c/busses/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202302200400.mEwj4pGt-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/i2c/busses/i2c-ljca.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/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/hexagon/include/asm/io.h:334: include/asm-generic/io.h:547:31: 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:560:61: 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:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from drivers/i2c/busses/i2c-ljca.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/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/hexagon/include/asm/io.h:334: include/asm-generic/io.h:573:61: 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:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from drivers/i2c/busses/i2c-ljca.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/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/hexagon/include/asm/io.h:334: include/asm-generic/io.h:584:33: 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:594:59: 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:604:59: 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); ~~~~~~~~~~ ^ >> drivers/i2c/busses/i2c-ljca.c:78:63: warning: operator '?:' has lower precedence than '|'; '|' will be evaluated first [-Wbitwise-conditional-parentheses] return (slave_addr << 1) | (type == LJCA_I2C_READ_XFER_TYPE) ? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ drivers/i2c/busses/i2c-ljca.c:78:63: note: place parentheses around the '|' expression to silence this warning return (slave_addr << 1) | (type == LJCA_I2C_READ_XFER_TYPE) ? ^ ( ) drivers/i2c/busses/i2c-ljca.c:78:63: note: place parentheses around the '?:' expression to evaluate it first return (slave_addr << 1) | (type == LJCA_I2C_READ_XFER_TYPE) ? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ >> drivers/i2c/busses/i2c-ljca.c:339:40: warning: unused variable 'ljca_i2c_id' [-Wunused-const-variable] static const struct platform_device_id ljca_i2c_id[] = { ^ 8 warnings generated. vim +78 drivers/i2c/busses/i2c-ljca.c 75 76 static u8 ljca_i2c_format_slave_addr(u8 slave_addr, u8 type) 77 { > 78 return (slave_addr << 1) | (type == LJCA_I2C_READ_XFER_TYPE) ? 79 LJCA_I2C_SLAVE_TRANSFER_READ : 80 LJCA_I2C_SLAVE_TRANSFER_WRITE; 81 } 82 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
