Hi Michal, FYI, the error/warning still remains. tree: https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.4 head: bb8c1c9c0b132b50f6199d2e8cfcf0157544e9cc commit: af0c19b6f15388c554317280433100fd9f3d7d0a [1277/1452] gpio: xilinx: Use xilinx tested gpio driver config: alpha-randconfig-r034-20200812 (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 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 git checkout af0c19b6f15388c554317280433100fd9f3d7d0a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 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 >>): drivers/gpio/gpio-xilinx.c:68:25: error: field 'mmchip' has incomplete type 68 | struct of_mm_gpio_chip mmchip; | ^~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_get': drivers/gpio/gpio-xilinx.c:94:34: error: implicit declaration of function 'to_of_mm_gpio_chip' [-Werror=implicit-function-declaration] 94 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:94:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] In file included from arch/alpha/include/asm/compiler.h:11, from arch/alpha/include/asm/bitops.h:9, from include/linux/bitops.h:26, from drivers/gpio/gpio-xilinx.c:15: include/linux/kernel.h:994:32: error: dereferencing pointer to incomplete type 'struct of_mm_gpio_chip' 994 | BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ | ^~~~~~ include/linux/compiler.h:330:9: note: in definition of macro '__compiletime_assert' 330 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/kernel.h:994:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' 994 | BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ | ^~~~~~~~~~~~~~~~ include/linux/kernel.h:994:20: note: in expansion of macro '__same_type' 994 | BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ | ^~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:96:6: note: in expansion of macro 'container_of' 96 | container_of(mm_gc, struct xgpio_instance, mmchip); | ^~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_set': drivers/gpio/gpio-xilinx.c:115:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 115 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_set_multiple': drivers/gpio/gpio-xilinx.c:147:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 147 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_dir_in': drivers/gpio/gpio-xilinx.c:187:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 187 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_dir_out': drivers/gpio/gpio-xilinx.c:218:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 218 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_xlate': drivers/gpio/gpio-xilinx.c:274:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 274 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ 277 | if (gc->of_gpio_n_cells == 3 && flags) | ^~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_irq_mask': drivers/gpio/gpio-xilinx.c:315:12: warning: conversion from 'long unsigned int' to 'u32' {aka 'unsigned int'} changes value from '18446744071562067967' to '2147483647' [-Woverflow] 315 | ~XGPIO_GIER_IE); drivers/gpio/gpio-xilinx.c:50:51: note: in definition of macro 'xgpio_writereg' 50 | # define xgpio_writereg(offset, val) __raw_writel(val, offset) | ^~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_to_irq': drivers/gpio/gpio-xilinx.c:392:34: warning: initialization of 'struct of_mm_gpio_chip *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 392 | struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); | ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c: In function 'xgpio_remove': drivers/gpio/gpio-xilinx.c:576:2: error: implicit declaration of function 'of_mm_gpiochip_remove'; did you mean 'gpiochip_remove'? [-Werror=implicit-function-declaration] 576 | of_mm_gpiochip_remove(&chip->mmchip); | ^~~~~~~~~~~~~~~~~~~~~ | gpiochip_remove drivers/gpio/gpio-xilinx.c: In function 'xgpio_of_probe': drivers/gpio/gpio-xilinx.c:676:11: error: implicit declaration of function 'of_mm_gpiochip_add'; did you mean 'gpiochip_add'? [-Werror=implicit-function-declaration] 676 | status = of_mm_gpiochip_add(np, &chip->mmchip); | ^~~~~~~~~~~~~~~~~~ | gpiochip_add cc1: some warnings being treated as errors vim +277 drivers/gpio/gpio-xilinx.c 261 262 /** 263 * xgpio_xlate - Translate gpio_spec to the GPIO number and flags 264 * @gc: Pointer to gpio_chip device structure. 265 * @gpiospec: gpio specifier as found in the device tree 266 * @flags: A flags pointer based on binding 267 * 268 * Return: 269 * irq number otherwise -EINVAL 270 */ 271 static int xgpio_xlate(struct gpio_chip *gc, 272 const struct of_phandle_args *gpiospec, u32 *flags) 273 { 274 struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); 275 struct xgpio_instance *chip = container_of(mm_gc, struct xgpio_instance, 276 mmchip); 278 *flags = gpiospec->args[2]; 279 280 if (gpiospec->args[1] == chip->offset) 281 return gpiospec->args[0]; 282 283 return -EINVAL; 284 } 285 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org