The blink driver wakes up every jiffies which wastes power unnecessarily.
Using a notifier gives same effect. Also add ability to unload module.
Signed-off-by: Stephen Hemminger <[email protected]>
--- a/drivers/misc/blink.c 2007-06-29 22:56:20.000000000 -0400
+++ b/drivers/misc/blink.c 2007-07-01 12:44:37.000000000 -0400
@@ -16,12 +16,30 @@ static void do_blink(unsigned long data)
add_timer(&blink_timer);
}
-static int blink_init(void)
+static int blink_panic_event(struct notifier_block *blk,
+ unsigned long event, void *arg)
{
- printk(KERN_INFO "Enabling keyboard blinking\n");
do_blink(0);
return 0;
}
+static struct notifier_block blink_notify = {
+ .notifier_call = blink_panic_event,
+};
+
+static __init int blink_init(void)
+{
+ printk(KERN_INFO "Enabling keyboard blinking\n");
+ atomic_notifier_chain_register(&panic_notifier_list, &blink_notify);
+ return 0;
+}
+
+static __exit void blink_remove(void)
+{
+ del_timer_sync(&blink_timer);
+ atomic_notifier_chain_unregister(&panic_notifier_list, &blink_notify);
+}
+
module_init(blink_init);
+module_exit(blink_remove);
-
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