1 #include <linux/kernel.h>
2 #include <linux/module.h>
3 #include <linux/timer.h>
4 #include <linux/jiffies.h>
6 static void do_blink(unsigned long data);
8 static DEFINE_TIMER(blink_timer, do_blink, 0 ,0);
10 static void do_blink(unsigned long data)
15 blink_timer.expires = jiffies + msecs_to_jiffies(1);
16 add_timer(&blink_timer);
19 static int blink_panic_event(struct notifier_block *blk,
20 unsigned long event, void *arg)
26 static struct notifier_block blink_notify = {
27 .notifier_call = blink_panic_event,
30 static __init int blink_init(void)
32 printk(KERN_INFO "Enabling keyboard blinking\n");
33 atomic_notifier_chain_register(&panic_notifier_list, &blink_notify);
37 static __exit void blink_remove(void)
39 del_timer_sync(&blink_timer);
40 atomic_notifier_chain_unregister(&panic_notifier_list, &blink_notify);
43 module_init(blink_init);
44 module_exit(blink_remove);