backlight_register_notifier  415 drivers/acpi/video_detect.c 		if (backlight_register_notifier(&backlight_nb) == 0)
backlight_register_notifier  497 drivers/video/backlight/backlight.c EXPORT_SYMBOL(backlight_register_notifier);
backlight_register_notifier  190 include/linux/backlight.h extern int backlight_register_notifier(struct notifier_block *nb);