Hi Dong, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 3f267ec60b922eff2a5c90d532357a39f155b730 commit: 77d8f3068c63ee0983f0b5ba3207d3f7cce11be4 [1359/2564] clk: imx: scu: add two cells binding support config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=77d8f3068c63ee0983f0b5ba3207d3f7cce11be4 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 77d8f3068c63ee0983f0b5ba3207d3f7cce11be4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from include/linux/device.h:32, from include/linux/of_platform.h:9, from drivers/clk/imx/clk-scu.c:11: include/linux/device/driver.h:290:1: warning: data definition has no type or storage class 290 | device_initcall(__driver##_init); | ^~~~~~~~~~~~~~~ include/linux/platform_device.h:258:2: note: in expansion of macro 'builtin_driver' 258 | builtin_driver(__platform_driver, platform_driver_register) | ^~~~~~~~~~~~~~ drivers/clk/imx/clk-scu.c:477:1: note: in expansion of macro 'builtin_platform_driver' 477 | builtin_platform_driver(imx_clk_scu_driver); | ^~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/device/driver.h:290:1: error: type defaults to 'int' in declaration of 'device_initcall' [-Werror=implicit-int] 290 | device_initcall(__driver##_init); | ^~~~~~~~~~~~~~~ include/linux/platform_device.h:258:2: note: in expansion of macro 'builtin_driver' 258 | builtin_driver(__platform_driver, platform_driver_register) | ^~~~~~~~~~~~~~ drivers/clk/imx/clk-scu.c:477:1: note: in expansion of macro 'builtin_platform_driver' 477 | builtin_platform_driver(imx_clk_scu_driver); | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/clk/imx/clk-scu.c:477:1: warning: parameter names (without types) in function declaration In file included from include/linux/device.h:32, from include/linux/of_platform.h:9, from drivers/clk/imx/clk-scu.c:11: drivers/clk/imx/clk-scu.c:477:25: warning: 'imx_clk_scu_driver_init' defined but not used [-Wunused-function] 477 | builtin_platform_driver(imx_clk_scu_driver); | ^~~~~~~~~~~~~~~~~~ include/linux/device/driver.h:286:19: note: in definition of macro 'builtin_driver' 286 | static int __init __driver##_init(void) \ | ^~~~~~~~ drivers/clk/imx/clk-scu.c:477:1: note: in expansion of macro 'builtin_platform_driver' 477 | builtin_platform_driver(imx_clk_scu_driver); | ^~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +290 include/linux/device/driver.h 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 269 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 270 /** 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 271 * builtin_driver() - Helper macro for drivers that don't do anything 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 272 * special in init and have no exit. This eliminates some boilerplate. 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 273 * Each driver may only use this macro once, and calling it replaces 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 274 * device_initcall (or in some cases, the legacy __initcall). This is 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 275 * meant to be a direct parallel of module_driver() above but without 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 276 * the __exit stuff that is not used for builtin cases. 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 277 * 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 278 * @__driver: driver name 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 279 * @__register: register function for this driver type 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 280 * @...: Additional arguments to be passed to __register 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 281 * 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 282 * Use this macro to construct bus specific macros for registering 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 283 * drivers, and do not use it on its own. 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 284 */ 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 285 #define builtin_driver(__driver, __register, ...) \ 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 286 static int __init __driver##_init(void) \ 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 287 { \ 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 288 return __register(&(__driver) , ##__VA_ARGS__); \ 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 289 } \ 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 @290 device_initcall(__driver##_init); 4c002c978b7f2f2 Greg Kroah-Hartman 2019-12-09 291 :::::: The code at line 290 was first introduced by commit :::::: 4c002c978b7f2f2306d53de051c054504af920a9 device.h: move 'struct driver' stuff out to device/driver.h :::::: TO: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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