LED_SET_BRIGHTNESS
set_bit(LED_SET_BRIGHTNESS, &led_cdev->work_flags);
if (test_and_clear_bit(LED_SET_BRIGHTNESS, &led_cdev->work_flags))
if (test_bit(LED_SET_BRIGHTNESS, &led_cdev->work_flags) ||
set_bit(LED_SET_BRIGHTNESS, &led_cdev->work_flags);
set_bit(LED_SET_BRIGHTNESS, &led_cdev->work_flags);
clear_bit(LED_SET_BRIGHTNESS, &led_cdev->work_flags);