refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.

1 files changed, 0 insertions, 61 deletions

diff --git a/na/kernel/sync/spinlock.h b/na/kernel/sync/spinlock.h
deleted file mode 100644
index a1369d1..0000000
--- a/na/kernel/sync/spinlock.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-#pragma once
-
-/*
- * Spinlock & LockGuard
- *
- * Provides mutual exclusion for SMP kernels using TTAS
- * (Test-and-Test-and-Set) with acquire/release memory ordering.
- * Interrupt disable/enable is managed automatically via push_intr/pop_intr.
- *
- * Reference: docs/specs/spinlock.md
- */
-
-#include <lume/atomic.h>
-#include <lume/types.h>
-#include "cpu_state.h"
-
-class Spinlock {
-public:
-    // Default: BSS zero is safe. Call init() to give the lock a name.
-    Spinlock() = default;
-
-    // Explicit initialization (for global objects or Placement New)
-    void init(const char* name);
-
-    // Non-copyable, non-movable (lock identity is its address)
-    Spinlock(const Spinlock&) = delete;
-    Spinlock& operator=(const Spinlock&) = delete;
-    Spinlock(Spinlock&&) = delete;
-    Spinlock& operator=(Spinlock&&) = delete;
-
-    void acquire();
-    void release();
-    bool is_held_by_current_cpu() const;
-
-private:
-    lume::atomic<uint32> locked_;             // 0 = free, 1 = held
-    const char* name_ = "uninit";          // Lock name (for panic messages)
-    uint64 cpu_id_ = sync::kInvalidCpuId;  // Holder CPU ID
-};
-
-class LockGuard {
-public:
-    explicit LockGuard(Spinlock& lock) : lock_(lock) {
-        lock_.acquire();
-    }
-
-    ~LockGuard() {
-        lock_.release();
-    }
-
-    LockGuard(const LockGuard&) = delete;
-    LockGuard& operator=(const LockGuard&) = delete;
-    LockGuard(LockGuard&&) = delete;
-    LockGuard& operator=(LockGuard&&) = delete;
-
-private:
-    Spinlock& lock_;
-};