I’m writing a linux driver and I would like to register a callback function to be invoked when the system goes to sleep. What is the api to do this?
Thanks.
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I’m writing a linux driver and I would like to register a callback function to be invoked when the system goes to sleep. What is the api to do this?
Thanks.
The solution I settled on was using notifier chains. On later versions of the kernel you can register with register_pm_notifier. If your kernel doesn’t support that api you can use the notifier for cpu hot-plug events (this appears to be what KVM uses). On the way in and out of suspend the cpu hotplug notifier chain fires.