Re: [PATCH v1] drivers: make struct device_driver::remove return void

[kernel test robot <lkp@intel.com>]

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Hi "Uwe,

I love your patch! Yet something to improve:

[auto build test ERROR on 407ab579637ced6dc32cfb2295afb7259cca4b22]

url:    https://github.com/0day-ci/linux/commits/Uwe-Kleine-K-nig/drivers-make-struct-device_driver-remove-return-void/20201110-230939
base:    407ab579637ced6dc32cfb2295afb7259cca4b22
config: mips-randconfig-p002-20201110 (attached as .config)
compiler: mipsel-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
        # https://github.com/0day-ci/linux/commit/b836c14181cf5aab71cd870732f72437811ab228
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Uwe-Kleine-K-nig/drivers-make-struct-device_driver-remove-return-void/20201110-230939
        git checkout b836c14181cf5aab71cd870732f72437811ab228
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

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

All errors (new ones prefixed by >>):

>> drivers/net/fddi/defza.c:1551:13: error: initialization of 'void (*)(struct device *)' from incompatible pointer type 'int (*)(struct device *)' [-Werror=incompatible-pointer-types]
    1551 |   .remove = fza_remove,
         |             ^~~~~~~~~~
   drivers/net/fddi/defza.c:1551:13: note: (near initialization for 'fza_driver.driver.remove')
   cc1: some warnings being treated as errors
--
>> drivers/video/fbdev/tgafb.c:138:14: error: initialization of 'void (*)(struct device *)' from incompatible pointer type 'int (*)(struct device *)' [-Werror=incompatible-pointer-types]
     138 |   .remove  = tgafb_tc_unregister,
         |              ^~~~~~~~~~~~~~~~~~~
   drivers/video/fbdev/tgafb.c:138:14: note: (near initialization for 'tgafb_tc_driver.driver.remove')
   drivers/video/fbdev/tgafb.c: In function 'tgafb_clut_imageblit':
   drivers/video/fbdev/tgafb.c:840:16: warning: variable 'regs_base' set but not used [-Wunused-but-set-variable]
     840 |  void __iomem *regs_base, *fb_base;
         |                ^~~~~~~~~
   cc1: some warnings being treated as errors
--
>> drivers/video/fbdev/pmag-aa-fb.c:281:13: error: initialization of 'void (*)(struct device *)' from incompatible pointer type 'int (*)(struct device *)' [-Werror=incompatible-pointer-types]
     281 |   .remove = pmagaafb_remove,
         |             ^~~~~~~~~~~~~~~
   drivers/video/fbdev/pmag-aa-fb.c:281:13: note: (near initialization for 'pmagaafb_driver.driver.remove')
   cc1: some warnings being treated as errors
--
>> drivers/video/fbdev/pmag-ba-fb.c:271:13: error: initialization of 'void (*)(struct device *)' from incompatible pointer type 'int (*)(struct device *)' [-Werror=incompatible-pointer-types]
     271 |   .remove = pmagbafb_remove,
         |             ^~~~~~~~~~~~~~~
   drivers/video/fbdev/pmag-ba-fb.c:271:13: note: (near initialization for 'pmagbafb_driver.driver.remove')
   cc1: some warnings being treated as errors
--
>> drivers/video/fbdev/pmagb-b-fb.c:389:13: error: initialization of 'void (*)(struct device *)' from incompatible pointer type 'int (*)(struct device *)' [-Werror=incompatible-pointer-types]
     389 |   .remove = pmagbbfb_remove,
         |             ^~~~~~~~~~~~~~~
   drivers/video/fbdev/pmagb-b-fb.c:389:13: note: (near initialization for 'pmagbbfb_driver.driver.remove')
   cc1: some warnings being treated as errors
--
>> drivers/net/ethernet/amd/declance.c:1330:13: error: initialization of 'void (*)(struct device *)' from incompatible pointer type 'int (*)(struct device *)' [-Werror=incompatible-pointer-types]
    1330 |   .remove = dec_lance_tc_remove,
         |             ^~~~~~~~~~~~~~~~~~~
   drivers/net/ethernet/amd/declance.c:1330:13: note: (near initialization for 'dec_lance_tc_driver.driver.remove')
   cc1: some warnings being treated as errors

vim +1551 drivers/net/fddi/defza.c

61414f5ec9834df Maciej W. Rozycki 2018-10-09  1544  
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1545  static struct tc_driver fza_driver = {
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1546  	.id_table	= fza_tc_table,
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1547  	.driver		= {
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1548  		.name	= "defza",
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1549  		.bus	= &tc_bus_type,
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1550  		.probe	= fza_probe,
61414f5ec9834df Maciej W. Rozycki 2018-10-09 @1551  		.remove	= fza_remove,
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1552  	},
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1553  };
61414f5ec9834df Maciej W. Rozycki 2018-10-09  1554  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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