-int arch_register_cpu(int num){
- struct node *parent = NULL;
-
-#ifdef CONFIG_NUMA
- int node = cpu_to_node(num);
- if (node_online(node))
- parent = &node_devices[node].node;
-#endif /* CONFIG_NUMA */
-
- return register_cpu(&cpu_devices[num].cpu, num, parent);
+int arch_register_cpu(int num)
+{
+ /*
+ * CPU0 cannot be offlined due to several
+ * restrictions and assumptions in kernel. This basically
+ * doesnt add a control file, one cannot attempt to offline
+ * BSP.
+ */
+ if (!num)
+ cpu_devices[num].cpu.no_control = 1;
+
+ return register_cpu(&cpu_devices[num].cpu, num);