[chrome-os:chromeos-4.14 17/19] drivers/gpu/drm/evdi/evdi_drv.c:95:6: error: no previous prototype for 'evdi_platform_device_link'

[chrome-os:chromeos-4.14 17/19] drivers/gpu/drm/evdi/evdi_drv.c:95:6: error: no previous prototype for 'evdi_platform_device_link'

[kernel test robot]

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tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.14
head:   6f8992e59d85c46b0273cd2a3a9ab9cea8ddb4a1
commit: 999225d0e44ef997ab7f8965b2ffb262864dae35 [17/19] CHROMIUM: drm/evdi: Create sysfs link from evdi to its parent device and unlink on detach
config: arm64-chromiumos-arm64-customedconfig-chrome-os:chromeos-4.14:1bf13820918c8ea2f8d01d646008dbc3c1cb5bee (attached as .config)
compiler: aarch64-linux-gcc (GCC) 7.5.0
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 remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel
        git fetch --no-tags chrome-os chromeos-4.14
        git checkout 999225d0e44ef997ab7f8965b2ffb262864dae35
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=arm64 

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/gpu/drm/evdi/evdi_drv.c:83:6: error: no previous prototype for 'evdi_platform_device_is_free' [-Werror=missing-prototypes]
    bool evdi_platform_device_is_free(struct platform_device *pdev)
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/evdi/evdi_drv.c:95:6: error: no previous prototype for 'evdi_platform_device_link' [-Werror=missing-prototypes]
    void evdi_platform_device_link(struct platform_device *pdev,
         ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/evdi/evdi_drv.c: In function 'add_device_with_usb_path':
   drivers/gpu/drm/evdi/evdi_drv.c:442:8: error: variable 'itf_token' set but not used [-Werror=unused-but-set-variable]
     char *itf_token = NULL;
           ^~~~~~~~~
   cc1: all warnings being treated as errors


vim +/evdi_platform_device_link +95 drivers/gpu/drm/evdi/evdi_drv.c

    82	
  > 83	bool evdi_platform_device_is_free(struct platform_device *pdev)
    84	{
    85		struct evdi_platform_device_data *data =
    86			(struct evdi_platform_device_data *)platform_get_drvdata(pdev);
    87		struct evdi_device *evdi = data->drm_dev->dev_private;
    88	
    89		if (evdi && !evdi_painter_is_connected(evdi) &&
    90		    !data->symlinked)
    91			return true;
    92		return false;
    93	}
    94	
  > 95	void evdi_platform_device_link(struct platform_device *pdev,
    96					      struct device *parent)
    97	{
    98		struct evdi_platform_device_data *data = NULL;
    99		int ret = 0;
   100	
   101		if (!parent || !pdev)
   102			return;
   103	
   104		data = (struct evdi_platform_device_data *)platform_get_drvdata(pdev);
   105		if (!evdi_platform_device_is_free(pdev)) {
   106			EVDI_FATAL("Device is already attached can't symlink again\n");
   107			return;
   108		}
   109	
   110		ret = sysfs_create_link(&pdev->dev.kobj, &parent->kobj, "device");
   111		if (ret) {
   112			EVDI_FATAL("Failed to create sysfs link to parent device\n");
   113		} else {
   114			data->symlinked = true;
   115			data->parent = parent;
   116		}
   117	}
   118	

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

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