From 1768a553c054b3e4774daaeda6c44f511ca7077a Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Tue, 21 Apr 2026 23:21:23 +0800
Subject: feat: refactor Spinlock implementation to use atomic operations for
 lock management

---
 na/kernel/sync/spinlock.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'na/kernel/sync/spinlock.h')

diff --git a/na/kernel/sync/spinlock.h b/na/kernel/sync/spinlock.h
index b3e3393..cf70a30 100644
--- a/na/kernel/sync/spinlock.h
+++ b/na/kernel/sync/spinlock.h
@@ -14,6 +14,7 @@
  */
 
 #include <lume/types.h>
+#include <lume/atomic.h>
 #include "cpu_state.h"
 
 class Spinlock {
@@ -35,7 +36,7 @@ public:
     bool is_held_by_current_cpu() const;
 
 private:
-    uint32 locked_ = 0;                    // 0 = free, 1 = held
+    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
 };
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