1 files changed, 78 insertions, 0 deletions
diff --git a/Kernel/Arch/aarch64/Spinlock.h b/Kernel/Arch/aarch64/Spinlock.h
new file mode 100644
index 0000000000..5dd711b0d5
--- /dev/null
+++ b/Kernel/Arch/aarch64/Spinlock.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Noncopyable.h>
+#include <AK/Types.h>
+#include <Kernel/Locking/LockRank.h>
+
+namespace Kernel {
+
+class Spinlock {
+    AK_MAKE_NONCOPYABLE(Spinlock);
+    AK_MAKE_NONMOVABLE(Spinlock);
+
+public:
+    Spinlock(LockRank rank = LockRank::None)
+    {
+        (void)rank;
+    }
+
+    ALWAYS_INLINE u32 lock()
+    {
+        return 0;
+    }
+
+    ALWAYS_INLINE void unlock(u32 /*prev_flags*/)
+    {
+    }
+
+    [[nodiscard]] ALWAYS_INLINE bool is_locked() const
+    {
+        return false;
+    }
+
+    ALWAYS_INLINE void initialize()
+    {
+    }
+};
+
+class RecursiveSpinlock {
+    AK_MAKE_NONCOPYABLE(RecursiveSpinlock);
+    AK_MAKE_NONMOVABLE(RecursiveSpinlock);
+
+public:
+    RecursiveSpinlock(LockRank rank = LockRank::None)
+    {
+        (void)rank;
+    }
+
+    ALWAYS_INLINE u32 lock()
+    {
+        return 0;
+    }
+
+    ALWAYS_INLINE void unlock(u32 /*prev_flags*/)
+    {
+    }
+
+    [[nodiscard]] ALWAYS_INLINE bool is_locked() const
+    {
+        return false;
+    }
+
+    [[nodiscard]] ALWAYS_INLINE bool is_locked_by_current_processor() const
+    {
+        return false;
+    }
+
+    ALWAYS_INLINE void initialize()
+    {
+    }
+};
+
+}