Hi Meghana, [auto build test WARNING on v4.14-rc3] [also build test WARNING on next-20171009] [cannot apply to drm/drm-next backlight/for-backlight-next drm-exynos/exynos-drm/for-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Meghana-Madhyastha/Move-backlight-helper-functions-from-tinydrm-helpers-to-linux-backlight/20171013-062032 config: i386-randconfig-x001-201741 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): drivers/video/backlight/backlight.c: In function 'backlight_get': >> drivers/video/backlight/backlight.c:609:39: warning: character constant too long for its type np = of_parse_phandle(dev->of_node, 'backlight', 0); ^~~~~~~~~~~ >> drivers/video/backlight/backlight.c:609:39: warning: passing argument 2 of 'of_parse_phandle' makes pointer from integer without a cast [-Wint-conversion] In file included from include/linux/irqdomain.h:34:0, from include/linux/i2c.h:34, from include/uapi/linux/fb.h:5, from include/linux/fb.h:5, from include/linux/backlight.h:12, from drivers/video/backlight/backlight.c:13: include/linux/of.h:358:28: note: expected 'const char *' but argument is of type 'int' extern struct device_node *of_parse_phandle(const struct device_node *np, ^~~~~~~~~~~~~~~~ vim +609 drivers/video/backlight/backlight.c 582 583 /** 584 * backlight_get - Get backlight device 585 * @dev: Device 586 * 587 * This function looks for a property named 'backlight' on the DT node 588 * connected to @dev and looks up the backlight device. 589 * 590 * Call backlight_put() to drop the reference on the backlight device. 591 * 592 * Returns: 593 * A pointer to the backlight device if found. 594 * Error pointer -EPROBE_DEFER if the DT property is set, but no backlight 595 * device is found. 596 * NULL if there's no backlight property. 597 */ 598 599 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) 600 struct backlight_device *backlight_get(struct device *dev) 601 { 602 struct backlight_device *bd = NULL; 603 struct device_node *np; 604 605 if (!dev) 606 return NULL; 607 608 if (IS_ENABLED(CONFIG_OF) && dev->of_node) { > 609 np = of_parse_phandle(dev->of_node, 'backlight', 0); 610 if (np) { 611 bd = of_find_backlight_by_node(np); 612 of_node_put(np); 613 if (!bd) 614 return ERR_PTR(-EPROBE_DEFER); 615 } 616 } 617 618 return bd; 619 } 620 EXPORT_SYMBOL(backlight_get); 621 #endif 622 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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