foo

arch/x86_64/include/x86_64/percpu.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <zinnia/irq.h>
+#include <zinnia/percpu.h>
 #include <stddef.h>
 #include <x86_64/apic.h>
 #include <x86_64/gdt.h>
@@ -18,3 +19,6 @@ struct arch_percpu {
 };
 
 extern struct arch_percpu arch_data;
+
+// Initializes the calling CPU and makes `cpu` its per-CPU block.
+void x86_64_cpu_setup(struct percpu* cpu);