Hi Wenyou, I love your patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v4.14-rc7 next-20171018] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Wenyou-Yang/media-i2c-Add-the-ov7740-image-sensor-driver/20171030-140347 base: git://linuxtv.org/media_tree.git master config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=sh All warnings (new ones prefixed by >>): >> drivers/media/i2c/ov7740.c:57:0: warning: "REG_REG15" redefined #define REG_REG15 0x15 In file included from arch/sh/include/asm/ptrace_32.h:4:0, from arch/sh/include/uapi/asm/ptrace.h:30, from arch/sh/include/asm/ptrace.h:13, from include/linux/irq.h:28, from include/linux/gpio/driver.h:6, from include/asm-generic/gpio.h:12, from arch/sh/include/asm/gpio.h:23, from include/linux/gpio.h:48, from drivers/media/i2c/ov7740.c:16: arch/sh/include/uapi/asm/ptrace_32.h:20:0: note: this is the location of the previous definition #define REG_REG15 15 In file included from drivers/media/i2c/ov7740.c:21:0: drivers/media/i2c/ov7740.c: In function 'ov7740_set_ctrl': include/linux/regmap.h:73:2: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] regmap_update_bits_base(map, reg, mask, val, NULL, false, false) ^~~~~~~~~~~~~~~~~~~~~~~ drivers/media/i2c/ov7740.c:512:5: note: 'val' was declared here u8 val; ^~~ vim +/REG_REG15 +57 drivers/media/i2c/ov7740.c 55 56 #define REG_REG14 0x14 > 57 #define REG_REG15 0x15 58 #define REG15_GAIN_MSB 0x03 59 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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