apple_bl_registered  219 drivers/video/backlight/apple_bl.c static atomic_t apple_bl_registered = ATOMIC_INIT(0);
apple_bl_registered  223 drivers/video/backlight/apple_bl.c 	if (atomic_xchg(&apple_bl_registered, 1) == 0)
apple_bl_registered  232 drivers/video/backlight/apple_bl.c 	if (atomic_xchg(&apple_bl_registered, 0) == 1)