Source of led-triggers.c - linux-imx - PHYTEC BitBucket (Stash)

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    }
    /* Add to the list of led triggers */
    list_add_tail(&trig->next_trig, &trigger_list);
    up_write(&triggers_list_lock);
​
    /* Register with any LEDs that have this as a default trigger */
    down_read(&leds_list_lock);
    list_for_each_entry(led_cdev, &leds_list, node) {
        down_write(&led_cdev->trigger_lock);
        if (!led_cdev->trigger && led_cdev->default_trigger &&
                !strcmp(led_cdev->default_trigger, trig->name))
                !strcmp(led_cdev->default_trigger, trig->name)) {
            led_cdev->flags |= LED_INIT_DEFAULT_TRIGGER;
            led_trigger_set(led_cdev, trig);
        }
        up_write(&led_cdev->trigger_lock);
    }
    up_read(&leds_list_lock);
​
    return 0;
}
EXPORT_SYMBOL_GPL(led_trigger_register);
​
void led_trigger_unregister(struct led_trigger *trig)
{