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void led_twinkle_timer_function(unsigned long arg)
{
if (!led_twinkle_status)
{
myled_ioctl_led_on();
//printk(KERN_ALERT"led on \n");
led_twinkle_status = 1;
}
else
{
myled_ioctl_led_off();
//printk(KERN_ALERT"led off \n");
led_twinkle_status = 0;
}
mod_timer(&myled_dev->s_timer, jiffies+HZ);
}