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Message-ID: <201701041819.w6aBqgFn%fengguang.wu@intel.com>
Date:   Wed, 4 Jan 2017 18:18:36 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>
Subject: include/linux/device.h:1350:1: error: type defaults to 'int' in
 declaration of 'module_init'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0f64df30124018de92c7f22a044b975da8dd52cc
commit: d47529b2e9fe0ec2eb1f072afad8849f52e385c4 gpio: don't include module.h in shared driver header
date:   4 months ago
config: mips-xway_defconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout d47529b2e9fe0ec2eb1f072afad8849f52e385c4
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   drivers/mtd/nand/xway_nand.c:235:1: warning: data definition has no type or storage class
    MODULE_DEVICE_TABLE(of, xway_nand_match);
    ^~~~~~~~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:235:1: error: type defaults to 'int' in declaration of 'MODULE_DEVICE_TABLE' [-Werror=implicit-int]
   drivers/mtd/nand/xway_nand.c:235:1: warning: parameter names (without types) in function declaration
   In file included from include/linux/mtd/mtd.h:26:0,
                    from include/linux/mtd/nand.h:23,
                    from drivers/mtd/nand/xway_nand.c:10:
   include/linux/device.h:1350:1: warning: data definition has no type or storage class
    module_init(__driver##_init); \
    ^
   include/linux/platform_device.h:228:2: note: in expansion of macro 'module_driver'
     module_driver(__platform_driver, platform_driver_register, \
     ^~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
>> include/linux/device.h:1350:1: error: type defaults to 'int' in declaration of 'module_init' [-Werror=implicit-int]
    module_init(__driver##_init); \
    ^
   include/linux/platform_device.h:228:2: note: in expansion of macro 'module_driver'
     module_driver(__platform_driver, platform_driver_register, \
     ^~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/linkage.h:6:0,
                    from include/linux/kernel.h:6,
                    from include/linux/list.h:8,
                    from include/linux/wait.h:6,
                    from include/linux/mtd/nand.h:21,
                    from drivers/mtd/nand/xway_nand.c:10:
   include/linux/export.h:36:30: warning: parameter names (without types) in function declaration
    #define THIS_MODULE ((struct module *)0)
                                 ^
   include/linux/platform_device.h:198:34: note: in expansion of macro 'THIS_MODULE'
     __platform_driver_register(drv, THIS_MODULE)
                                     ^~~~~~~~~~~
   include/linux/device.h:1348:9: note: in expansion of macro 'platform_driver_register'
     return __register(&(__driver) , ##__VA_ARGS__); \
            ^~~~~~~~~~
   include/linux/platform_device.h:228:2: note: in expansion of macro 'module_driver'
     module_driver(__platform_driver, platform_driver_register, \
     ^~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/mtd/mtd.h:26:0,
                    from include/linux/mtd/nand.h:23,
                    from drivers/mtd/nand/xway_nand.c:10:
   include/linux/device.h:1355:1: warning: data definition has no type or storage class
    module_exit(__driver##_exit);
    ^
   include/linux/platform_device.h:228:2: note: in expansion of macro 'module_driver'
     module_driver(__platform_driver, platform_driver_register, \
     ^~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
>> include/linux/device.h:1355:1: error: type defaults to 'int' in declaration of 'module_exit' [-Werror=implicit-int]
    module_exit(__driver##_exit);
    ^
   include/linux/platform_device.h:228:2: note: in expansion of macro 'module_driver'
     module_driver(__platform_driver, platform_driver_register, \
     ^~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/linkage.h:6:0,
                    from include/linux/kernel.h:6,
                    from include/linux/list.h:8,
                    from include/linux/wait.h:6,
                    from include/linux/mtd/nand.h:21,
                    from drivers/mtd/nand/xway_nand.c:10:
   include/linux/export.h:36:30: warning: parameter names (without types) in function declaration
    #define THIS_MODULE ((struct module *)0)
                                 ^
   include/linux/platform_device.h:198:34: note: in expansion of macro 'THIS_MODULE'
     __platform_driver_register(drv, THIS_MODULE)
                                     ^~~~~~~~~~~
   include/linux/device.h:1348:9: note: in expansion of macro 'platform_driver_register'
     return __register(&(__driver) , ##__VA_ARGS__); \
            ^~~~~~~~~~
   include/linux/platform_device.h:228:2: note: in expansion of macro 'module_driver'
     module_driver(__platform_driver, platform_driver_register, \
     ^~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
   drivers/mtd/nand/xway_nand.c:248:16: error: expected declaration specifiers or '...' before string constant
    MODULE_LICENSE("GPL");
                   ^~~~~
   In file included from include/linux/mtd/mtd.h:26:0,
                    from include/linux/mtd/nand.h:23,
                    from drivers/mtd/nand/xway_nand.c:10:
   drivers/mtd/nand/xway_nand.c:246:24: warning: 'xway_nand_driver_init' defined but not used [-Wunused-function]
    module_platform_driver(xway_nand_driver);
                           ^
   include/linux/device.h:1346:19: note: in definition of macro 'module_driver'
    static int __init __driver##_init(void) \
                      ^~~~~~~~
   drivers/mtd/nand/xway_nand.c:246:1: note: in expansion of macro 'module_platform_driver'
    module_platform_driver(xway_nand_driver);
    ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +1350 include/linux/device.h

907d0ed1 Lars-Peter Clausen 2011-11-16  1344   */
cd494618 Lars-Peter Clausen 2012-02-25  1345  #define module_driver(__driver, __register, __unregister, ...) \
907d0ed1 Lars-Peter Clausen 2011-11-16  1346  static int __init __driver##_init(void) \
907d0ed1 Lars-Peter Clausen 2011-11-16  1347  { \
cd494618 Lars-Peter Clausen 2012-02-25  1348  	return __register(&(__driver) , ##__VA_ARGS__); \
907d0ed1 Lars-Peter Clausen 2011-11-16  1349  } \
907d0ed1 Lars-Peter Clausen 2011-11-16 @1350  module_init(__driver##_init); \
907d0ed1 Lars-Peter Clausen 2011-11-16  1351  static void __exit __driver##_exit(void) \
907d0ed1 Lars-Peter Clausen 2011-11-16  1352  { \
cd494618 Lars-Peter Clausen 2012-02-25  1353  	__unregister(&(__driver) , ##__VA_ARGS__); \
907d0ed1 Lars-Peter Clausen 2011-11-16  1354  } \
907d0ed1 Lars-Peter Clausen 2011-11-16 @1355  module_exit(__driver##_exit);
907d0ed1 Lars-Peter Clausen 2011-11-16  1356  
f309d444 Paul Gortmaker     2015-05-01  1357  /**
f309d444 Paul Gortmaker     2015-05-01  1358   * builtin_driver() - Helper macro for drivers that don't do anything

:::::: The code at line 1350 was first introduced by commit
:::::: 907d0ed1c84114d4e8dafd66af982515d3739c90 drivercore: Generalize module_platform_driver

:::::: TO: Lars-Peter Clausen <lars@...afoo.de>
:::::: CC: Greg Kroah-Hartman <gregkh@...e.de>

---
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