rtl: add LinkerSet

src/kern/sched.zig

@@ -384,10 +384,8 @@ pub fn update_priority_locked(td: *ke.Thread, new_prio: u8) void {
 
 }
 
-export const sched_percpu_init linksection(r.percpu_init) = &init_cpu;
-
 /// Initialize a CPU for use by the scheduler.
-fn init_cpu() linksection(r.init) callconv(.c) void {
+fn init_cpu() linksection(r.init) void {
     var cpu = percpu.local();
 
     cpu.* = .{
@@ -421,6 +419,10 @@ fn init_cpu() linksection(r.init) callconv(.c) void {
     }
 }
 
+comptime {
+    _ = r.percpu_init_set.insert(&init_cpu);
+}
+
 /// Called on CPU 0 to initialize load balancing mechanisms.
 pub fn late_init() linksection(r.init) void {
     balance_timer.init();