[mingo-tip:sched/headers 2295/2340] include/linux/device/driver.h:191:1: warning: data definition has no type or storage class

From: kernel test robot
Date: Wed Feb 23 2022 - 18:01:59 EST

tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head: 97c5eeb4de3ad324ed2a4656b46465299cfd010a
commit: 35386c8cd35ff67eacebac84ab12ca7a39c2d488 [2295/2340] headers/deps: driver/core: Optimize <linux/device/driver.h> dependencies, remove <linux/module.h> inclusion
config: mips-xway_defconfig (https://download.01.org/0day-ci/archive/20220224/202202240638.032BHfiI-lkp@xxxxxxxxx/config)
compiler: mips-linux-gcc (GCC) 11.2.0
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/mingo/tip.git/commit/?id=35386c8cd35ff67eacebac84ab12ca7a39c2d488
git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
git fetch --no-tags mingo-tip sched/headers
git checkout 35386c8cd35ff67eacebac84ab12ca7a39c2d488
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/lantiq/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h:12,
from arch/mips/lantiq/xway/dcdc.c:12:
arch/mips/lantiq/xway/dcdc.c: In function 'dcdc_probe':
arch/mips/include/asm/mach-lantiq/lantiq.h:18:33: error: implicit declaration of function '__raw_readb'; did you mean '__raw_emt'? [-Werror=implicit-function-declaration]
18 | #define ltq_r8(reg) __raw_readb(reg)
| ^~~~~~~~~~~
arch/mips/lantiq/xway/dcdc.c:20:25: note: in expansion of macro 'ltq_r8'
20 | #define dcdc_r8(x) ltq_r8(dcdc_membase + (x))
| ^~~~~~
include/linux/dev_printk.h:114:37: note: in expansion of macro 'dcdc_r8'
114 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
include/linux/dev_printk.h:154:9: note: in expansion of macro 'dev_printk_index_wrap'
154 | dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~
arch/mips/lantiq/xway/dcdc.c:33:9: note: in expansion of macro 'dev_info'
33 | dev_info(&pdev->dev, "Core Voltage : %d mV\n",
| ^~~~~~~~
arch/mips/lantiq/xway/dcdc.c: At top level:
arch/mips/lantiq/xway/dcdc.c:52:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'dcdc_init'
52 | int __init dcdc_init(void)
| ^~~~~~~~~
>> arch/mips/lantiq/xway/dcdc.c:61:1: warning: data definition has no type or storage class
61 | arch_initcall(dcdc_init);
| ^~~~~~~~~~~~~
arch/mips/lantiq/xway/dcdc.c:61:1: error: type defaults to 'int' in declaration of 'arch_initcall' [-Werror=implicit-int]
>> arch/mips/lantiq/xway/dcdc.c:61:1: warning: parameter names (without types) in function declaration
arch/mips/lantiq/xway/dcdc.c:44:31: warning: 'dcdc_driver' defined but not used [-Wunused-variable]
44 | static struct platform_driver dcdc_driver = {
| ^~~~~~~~~~~
cc1: some warnings being treated as errors
--
arch/mips/lantiq/xway/vmmc.c:16:15: warning: no previous prototype for 'ltq_get_cp1_base' [-Wmissing-prototypes]
16 | unsigned int *ltq_get_cp1_base(void)
| ^~~~~~~~~~~~~~~~
In file included from include/linux/platform_device.h:14,
from include/linux/of_device.h:7,
from include/linux/of_platform.h:12,
from arch/mips/lantiq/xway/vmmc.c:8:
arch/mips/lantiq/xway/vmmc.c:64:25: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'vmmc_driver_init'
64 | builtin_platform_driver(vmmc_driver);
| ^~~~~~~~~~~
include/linux/device/driver.h:187:19: note: in definition of macro 'builtin_driver'
187 | static int __init __driver##_init(void) \
| ^~~~~~~~
arch/mips/lantiq/xway/vmmc.c:64:1: note: in expansion of macro 'builtin_platform_driver'
64 | builtin_platform_driver(vmmc_driver);
| ^~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/device/driver.h:191:1: warning: data definition has no type or storage class
191 | device_initcall(__driver##_init);
| ^~~~~~~~~~~~~~~
include/linux/platform_device.h:263:9: note: in expansion of macro 'builtin_driver'
263 | builtin_driver(__platform_driver, platform_driver_register)
| ^~~~~~~~~~~~~~
arch/mips/lantiq/xway/vmmc.c:64:1: note: in expansion of macro 'builtin_platform_driver'
64 | builtin_platform_driver(vmmc_driver);
| ^~~~~~~~~~~~~~~~~~~~~~~
include/linux/device/driver.h:191:1: error: type defaults to 'int' in declaration of 'device_initcall' [-Werror=implicit-int]
191 | device_initcall(__driver##_init);
| ^~~~~~~~~~~~~~~
include/linux/platform_device.h:263:9: note: in expansion of macro 'builtin_driver'
263 | builtin_driver(__platform_driver, platform_driver_register)
| ^~~~~~~~~~~~~~
arch/mips/lantiq/xway/vmmc.c:64:1: note: in expansion of macro 'builtin_platform_driver'
64 | builtin_platform_driver(vmmc_driver);
| ^~~~~~~~~~~~~~~~~~~~~~~
>> arch/mips/lantiq/xway/vmmc.c:64:25: warning: parameter names (without types) in function declaration
64 | builtin_platform_driver(vmmc_driver);
| ^~~~~~~~~~~
include/linux/device/driver.h:187:19: note: in definition of macro 'builtin_driver'
187 | static int __init __driver##_init(void) \
| ^~~~~~~~
arch/mips/lantiq/xway/vmmc.c:64:1: note: in expansion of macro 'builtin_platform_driver'
64 | builtin_platform_driver(vmmc_driver);
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/mips/lantiq/xway/vmmc.c:57:31: warning: 'vmmc_driver' defined but not used [-Wunused-variable]
57 | static struct platform_driver vmmc_driver = {
| ^~~~~~~~~~~
cc1: some warnings being treated as errors


vim +191 include/linux/device/driver.h

4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 170
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 171 /**
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 172 * builtin_driver() - Helper macro for drivers that don't do anything
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 173 * special in init and have no exit. This eliminates some boilerplate.
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 174 * Each driver may only use this macro once, and calling it replaces
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 175 * device_initcall (or in some cases, the legacy __initcall). This is
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 176 * meant to be a direct parallel of module_driver() above but without
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 177 * the __exit stuff that is not used for builtin cases.
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 178 *
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 179 * @__driver: driver name
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 180 * @__register: register function for this driver type
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 181 * @...: Additional arguments to be passed to __register
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 182 *
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 183 * Use this macro to construct bus specific macros for registering
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 184 * drivers, and do not use it on its own.
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 185 */
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 186 #define builtin_driver(__driver, __register, ...) \
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 187 static int __init __driver##_init(void) \
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 188 { \
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 189 return __register(&(__driver) , ##__VA_ARGS__); \
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 190 } \
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 @191 device_initcall(__driver##_init);
4c002c978b7f2f Greg Kroah-Hartman 2019-12-09 192

:::::: The code at line 191 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