static int palinfo_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int hotcpu = (unsigned long)hcpu;
switch (action) {
case CPU_ONLINE:
create_palinfo_proc_entries(hotcpu);
break;
case CPU_DEAD:
remove_palinfo_proc_entries(hotcpu);
break;
}
return NOTIFY_OK;
}
static void __exit
palinfo_exit(void)
{
int i = 0;
/* remove all nodes: depth first pass. Could optimize this */
for_each_online_cpu(i) {
remove_palinfo_proc_entries(i);
}
/*
* Remove the top level entry finally
*/
remove_proc_entry(palinfo_dir->name, NULL);
/*
* Unregister from cpu notifier callbacks
*/
unregister_hotcpu_notifier(&palinfo_cpu_notifier);
}
