[chrome-os:chromeos-4.4 10/11] drivers/gpu/drm/evdi/evdi_drv.c:93:6: warning: no previous prototype for 'evdi_platform_device_link'

[chrome-os:chromeos-4.4 10/11] drivers/gpu/drm/evdi/evdi_drv.c:93:6: warning: 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-4.4
head:   6d5e8cb22c2a82dde051b99b44498bbc350c7130
commit: b21837b752bb13dbd2c2da17377c23f2e3cea264 [10/11] CHROMIUM: drm/evdi: Create sysfs link from evdi to its parent device and unlink on detach
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-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-4.4
        git checkout b21837b752bb13dbd2c2da17377c23f2e3cea264
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=xtensa 

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

All warnings (new ones prefixed by >>):

   cc1: warning: include/drm: No such file or directory [-Wmissing-include-dirs]
   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/list.h:4,
                    from include/linux/agp_backend.h:33,
                    from include/drm/drmP.h:35,
                    from drivers/gpu/drm/evdi/evdi_drv.c:10:
   include/linux/scatterlist.h: In function 'sg_set_buf':
   arch/xtensa/include/asm/page.h:175:9: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
            ^
   include/linux/compiler.h:182:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   include/linux/scatterlist.h:140:2: note: in expansion of macro 'BUG_ON'
     BUG_ON(!virt_addr_valid(buf));
     ^~~~~~
   arch/xtensa/include/asm/page.h:183:32: note: in expansion of macro 'pfn_valid'
    #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
                                   ^~~~~~~~~
   include/linux/scatterlist.h:140:10: note: in expansion of macro 'virt_addr_valid'
     BUG_ON(!virt_addr_valid(buf));
             ^~~~~~~~~~~~~~~
   In file included from drivers/gpu/drm/evdi/evdi_drv.h:23:0,
                    from drivers/gpu/drm/evdi/evdi_drv.c:17:
   include/linux/reservation.h: In function 'reservation_object_fini':
   include/linux/reservation.h:122:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for (i = 0; i < fobj->shared_count; ++i)
                    ^
   drivers/gpu/drm/evdi/evdi_drv.c: At top level:
   drivers/gpu/drm/evdi/evdi_drv.c:81:6: warning: no previous prototype for 'evdi_platform_device_is_free' [-Wmissing-prototypes]
    bool evdi_platform_device_is_free(struct platform_device *pdev)
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/evdi/evdi_drv.c:93:6: warning: no previous prototype for 'evdi_platform_device_link' [-Wmissing-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:367:8: warning: variable 'itf_token' set but not used [-Wunused-but-set-variable]
     char *itf_token = NULL;
           ^~~~~~~~~
   drivers/gpu/drm/evdi/evdi_drv.c: In function 'evdi_init':
   drivers/gpu/drm/evdi/evdi_drv.c:555:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for (i = 0; i < ARRAY_SIZE(evdi_device_attributes); i++) {
                    ^
   drivers/gpu/drm/evdi/evdi_drv.c: In function 'evdi_exit':
   drivers/gpu/drm/evdi/evdi_drv.c:574:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for (i = 0; i < ARRAY_SIZE(evdi_device_attributes); i++) {
                    ^


vim +/evdi_platform_device_link +93 drivers/gpu/drm/evdi/evdi_drv.c

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

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

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