ke: export Mutex

src/ex/init.zig

@@ -8,7 +8,7 @@ const ps = r.ps;
 const amd64 = @import("arch");
 const turnstile = ke.private.turnstile;
 
-var mtx: ke.private.mutex.Mutex = .init();
+var mtx: ke.Mutex = .init();
 var shared_counter: usize = 0;
 
 var work_item: ex.WorkItem = undefined;

src/kern/root.zig

@@ -19,6 +19,7 @@ pub const ExportedCpuLocal = p.cpu.ExportedCpuLocal;
 pub const CpuMask = p.cpu.CpuMask;
 pub const Event = p.event.Event;
 pub const Queue = p.queue.Queue;
+pub const Mutex = p.mutex.Mutex;
 
 // === Exported Interfaces ===
 pub const panic = p.panic.panic;