46 lines
972 B
C
46 lines
972 B
C
#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/jiffies.h>
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static void do_blink(unsigned long data);
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static DEFINE_TIMER(blink_timer, do_blink, 0 ,0);
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static void do_blink(unsigned long data)
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{
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static long count;
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if (panic_blink)
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panic_blink(count++);
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blink_timer.expires = jiffies + msecs_to_jiffies(1);
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add_timer(&blink_timer);
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}
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static int blink_panic_event(struct notifier_block *blk,
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unsigned long event, void *arg)
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{
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do_blink(0);
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return 0;
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}
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static struct notifier_block blink_notify = {
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.notifier_call = blink_panic_event,
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};
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static __init int blink_init(void)
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{
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printk(KERN_INFO "Enabling keyboard blinking\n");
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atomic_notifier_chain_register(&panic_notifier_list, &blink_notify);
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return 0;
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}
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static __exit void blink_remove(void)
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{
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del_timer_sync(&blink_timer);
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atomic_notifier_chain_unregister(&panic_notifier_list, &blink_notify);
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}
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module_init(blink_init);
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module_exit(blink_remove);
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