tree: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git gpiochip-no-driver-h head: 3357a6b5d4c178fcbe95eb72c4e653b3a5b41569 commit: 3357a6b5d4c178fcbe95eb72c4e653b3a5b41569 [2/2] See what explodes if we apply this patch config: arm-randconfig-r002-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7776b19eed44906e9973bfb240b6279d6feaab41) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git/com... git remote add gpio https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git git fetch --no-tags gpio gpiochip-no-driver-h git checkout 3357a6b5d4c178fcbe95eb72c4e653b3a5b41569 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/media/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from drivers/media/dvb-frontends/cxd2820r_core.c:9: In file included from drivers/media/dvb-frontends/cxd2820r_priv.h:16: In file included from include/linux/gpio.h:59: In file included from arch/arm/include/asm/gpio.h:10: include/asm-generic/gpio.h:58:9: error: implicit declaration of function 'gpiod_to_chip' [-Werror,-Wimplicit-function-declaration] return gpiod_to_chip(gpio_to_desc(gpio)); ^ include/asm-generic/gpio.h:58:9: note: did you mean 'gpio_to_chip'? include/asm-generic/gpio.h:56:33: note: 'gpio_to_chip' declared here static inline struct gpio_chip *gpio_to_chip(unsigned gpio) ^ include/asm-generic/gpio.h:58:9: warning: incompatible integer to pointer conversion returning 'int' from a function with result type 'struct gpio_chip *' [-Wint-conversion] return gpiod_to_chip(gpio_to_desc(gpio)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/media/dvb-frontends/cxd2820r_core.c:9: struct gpio_chip gpio_chip; ^ include/asm-generic/gpio.h:56:22: note: forward declaration of 'struct gpio_chip' static inline struct gpio_chip *gpio_to_chip(unsigned gpio) ^ struct cxd2820r_priv *priv = gpiochip_get_data(chip); ^ struct cxd2820r_priv *priv = gpiochip_get_data(chip); ^ ~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/dvb-frontends/cxd2820r_core.c:438:31: error: implicit declaration of function 'gpiochip_get_data' [-Werror,-Wimplicit-function-declaration] struct cxd2820r_priv *priv = gpiochip_get_data(chip); ^ drivers/media/dvb-frontends/cxd2820r_core.c:438:24: warning: incompatible integer to pointer conversion initializing 'struct cxd2820r_priv *' with an expression of type 'int' [-Wint-conversion] struct cxd2820r_priv *priv = gpiochip_get_data(chip); ^ ~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/dvb-frontends/cxd2820r_core.c:454:31: error: implicit declaration of function 'gpiochip_get_data' [-Werror,-Wimplicit-function-declaration] struct cxd2820r_priv *priv = gpiochip_get_data(chip); ^ drivers/media/dvb-frontends/cxd2820r_core.c:454:24: warning: incompatible integer to pointer conversion initializing 'struct cxd2820r_priv *' with an expression of type 'int' [-Wint-conversion] struct cxd2820r_priv *priv = gpiochip_get_data(chip); ^ ~~~~~~~~~~~~~~~~~~~~~~~ ret = gpiochip_add_data(&priv->gpio_chip, priv); ^ gpiochip_remove(&priv->gpio_chip); ^ 4 warnings and 7 errors generated. -- In file included from drivers/media/dvb-frontends/cxd2820r_c.c:9: In file included from drivers/media/dvb-frontends/cxd2820r_priv.h:16: In file included from include/linux/gpio.h:59: In file included from arch/arm/include/asm/gpio.h:10: include/asm-generic/gpio.h:58:9: error: implicit declaration of function 'gpiod_to_chip' [-Werror,-Wimplicit-function-declaration] return gpiod_to_chip(gpio_to_desc(gpio)); ^ include/asm-generic/gpio.h:58:9: note: did you mean 'gpio_to_chip'? include/asm-generic/gpio.h:56:33: note: 'gpio_to_chip' declared here static inline struct gpio_chip *gpio_to_chip(unsigned gpio) ^ include/asm-generic/gpio.h:58:9: warning: incompatible integer to pointer conversion returning 'int' from a function with result type 'struct gpio_chip *' [-Wint-conversion] return gpiod_to_chip(gpio_to_desc(gpio)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/media/dvb-frontends/cxd2820r_c.c:9: struct gpio_chip gpio_chip; ^ include/asm-generic/gpio.h:56:22: note: forward declaration of 'struct gpio_chip' static inline struct gpio_chip *gpio_to_chip(unsigned gpio) ^ 1 warning and 2 errors generated. vim +46 drivers/media/dvb-frontends/cxd2820r_priv.h fcd09f6592cc1d drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-08 27 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 28 struct cxd2820r_priv { 07fdf7d9f19fb6 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 29 struct i2c_client *client[2]; 43e2ea63eb9781 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-13 30 struct regmap *regmap[2]; 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 31 struct i2c_adapter *i2c; 14c038627e275f drivers/media/dvb/frontends/cxd2820r_priv.h Manu Abraham 2011-11-24 32 struct dvb_frontend fe; 07fdf7d9f19fb6 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 33 u8 ts_mode; 07fdf7d9f19fb6 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 34 bool ts_clk_inv; 07fdf7d9f19fb6 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 35 bool if_agc_polarity; 07fdf7d9f19fb6 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 36 bool spec_inv; 07fdf7d9f19fb6 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 37 4aa4fd86bca576 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-09 38 u64 post_bit_error_prev_dvbv3; 2832fd3177d7d9 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2016-08-08 39 u64 post_bit_error; 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 40 1d44ccb9ea7fc0 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-05-25 41 bool ber_running; 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 42 1e8f31f3172614 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2012-07-19 43 #define GPIO_COUNT 3 1e8f31f3172614 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2012-07-19 44 u8 gpio[GPIO_COUNT]; 1e8f31f3172614 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2012-07-19 45 #ifdef CONFIG_GPIOLIB 1e8f31f3172614 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2012-07-19 @46 struct gpio_chip gpio_chip; 1e8f31f3172614 drivers/media/dvb-frontends/cxd2820r_priv.h Antti Palosaari 2012-07-19 47 #endif 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 48 0df289a209e02f drivers/media/dvb-frontends/cxd2820r_priv.h Mauro Carvalho Chehab 2015-06-07 49 enum fe_delivery_system delivery_system; 1d44ccb9ea7fc0 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-05-25 50 bool last_tune_failed; /* for switch between T and T2 tune */ 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 51 }; 27cfc85e3dae18 drivers/media/dvb/frontends/cxd2820r_priv.h Antti Palosaari 2011-04-07 52 :::::: The code at line 46 was first introduced by commit :::::: 1e8f31f31726148c27de1ff4692c76c9bcff9860 [media] cxd2820r: use Kernel GPIO for GPIO access :::::: TO: Antti Palosaari <crope(a)iki.fi&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org