Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
blink driver power saving
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 <shemminger@linux-foundation.org>
[ We should really just delete the whole thing. The blink driver is
broken in many other ways too -Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
Stephen Hemminger
and committed by
Linus Torvalds
0f4915b9
4710bcce
+20
-2
+20
-2
drivers/misc/blink.c
+20
-2
drivers/misc/blink.c
···
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add_timer(&blink_timer);
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}
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-
static int blink_init(void)
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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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-
printk(KERN_INFO "Enabling keyboard blinking\n");
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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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+
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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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+
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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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+
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module_init(blink_init);
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module_exit(blink_remove);
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