[drm:drm-next 1199/1208] drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:198:26: error: redefinition of 'tinydrm_of_find_backlight'

[kbuild test robot]

tree:   git://people.freedesktop.org/~airlied/linux.git drm-next
head:   f81fa767077bbc9ac49c61ed97d28de09f3d069d
commit: 9f69eb5c36a644571cca6b2f8dc5f6a7cba04a8b [1199/1208] drm/tinydrm: Add helper functions
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 9f69eb5c36a644571cca6b2f8dc5f6a7cba04a8b
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:198:26: error: redefinition of 'tinydrm_of_find_backlight'
    struct backlight_device *tinydrm_of_find_backlight(struct device *dev)
                             ^~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:11:0:
   include/drm/tinydrm/tinydrm-helpers.h:53:1: note: previous definition of 'tinydrm_of_find_backlight' was here
    tinydrm_of_find_backlight(struct device *dev)
    ^~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:230:5: error: redefinition of 'tinydrm_enable_backlight'
    int tinydrm_enable_backlight(struct backlight_device *backlight)
        ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:11:0:
   include/drm/tinydrm/tinydrm-helpers.h:58:19: note: previous definition of 'tinydrm_enable_backlight' was here
    static inline int tinydrm_enable_backlight(struct backlight_device *backlight)
                      ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:258:5: error: redefinition of 'tinydrm_disable_backlight'
    int tinydrm_disable_backlight(struct backlight_device *backlight)
        ^~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c:11:0:
   include/drm/tinydrm/tinydrm-helpers.h:64:1: note: previous definition of 'tinydrm_disable_backlight' was here
    tinydrm_disable_backlight(struct backlight_device *backlight)
    ^~~~~~~~~~~~~~~~~~~~~~~~~

vim +/tinydrm_of_find_backlight +198 drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c

   192	 * Returns:
   193	 * NULL if there's no backlight property.
   194	 * Error pointer -EPROBE_DEFER if the DT node is found, but no backlight device
   195	 * is found.
   196	 * If the backlight device is found, a pointer to the structure is returned.
   197	 */
 > 198	struct backlight_device *tinydrm_of_find_backlight(struct device *dev)
   199	{
   200		struct backlight_device *backlight;
   201		struct device_node *np;
   202	
   203		np = of_parse_phandle(dev->of_node, "backlight", 0);
   204		if (!np)
   205			return NULL;
   206	
   207		backlight = of_find_backlight_by_node(np);
   208		of_node_put(np);
   209	
   210		if (!backlight)
   211			return ERR_PTR(-EPROBE_DEFER);
   212	
   213		if (!backlight->props.brightness) {
   214			backlight->props.brightness = backlight->props.max_brightness;
   215			DRM_DEBUG_KMS("Backlight brightness set to %d\n",
   216				      backlight->props.brightness);
   217		}
   218	
   219		return backlight;
   220	}
   221	EXPORT_SYMBOL(tinydrm_of_find_backlight);
   222	
   223	/**
   224	 * tinydrm_enable_backlight - Enable backlight helper
   225	 * @backlight: Backlight device
   226	 *
   227	 * Returns:
   228	 * Zero on success, negative error code on failure.
   229	 */
 > 230	int tinydrm_enable_backlight(struct backlight_device *backlight)
   231	{
   232		unsigned int old_state;
   233		int ret;
   234	
   235		if (!backlight)
   236			return 0;
   237	
   238		old_state = backlight->props.state;
   239		backlight->props.state &= ~BL_CORE_FBBLANK;
   240		DRM_DEBUG_KMS("Backlight state: 0x%x -> 0x%x\n", old_state,
   241			      backlight->props.state);
   242	
   243		ret = backlight_update_status(backlight);
   244		if (ret)
   245			DRM_ERROR("Failed to enable backlight %d\n", ret);
   246	
   247		return ret;
   248	}
   249	EXPORT_SYMBOL(tinydrm_enable_backlight);
   250	
   251	/**
   252	 * tinydrm_disable_backlight - Disable backlight helper
   253	 * @backlight: Backlight device
   254	 *
   255	 * Returns:
   256	 * Zero on success, negative error code on failure.
   257	 */
 > 258	int tinydrm_disable_backlight(struct backlight_device *backlight)
   259	{
   260		unsigned int old_state;
   261		int ret;

---
0-DAY kernel test infrastructure                Open Source Technology Center
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