AK: Move fence functions to AK/Fences.h

AK/Atomic.h

@@ -12,16 +12,6 @@
 
 namespace AK {
 
-static inline void atomic_signal_fence(MemoryOrder order) noexcept
-{
-    return __atomic_signal_fence(order);
-}
-
-static inline void atomic_thread_fence(MemoryOrder order) noexcept
-{
-    return __atomic_thread_fence(order);
-}
-
 template<typename T>
 static inline T atomic_exchange(T volatile* var, T desired, MemoryOrder order = memory_order_seq_cst) noexcept
 {

AK/Fences.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2026, Sönke Holz <[email protected]>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+
+namespace AK {
+
+static inline void atomic_signal_fence(MemoryOrder order) noexcept
+{
+    return __atomic_signal_fence(order);
+}
+
+static inline void atomic_thread_fence(MemoryOrder order) noexcept
+{
+    return __atomic_thread_fence(order);
+}
+
+}

Kernel/Arch/MemoryFences.h

@@ -10,7 +10,7 @@
 
 // This header provides architecture-agnostic abstractions for memory fences.
 // These fences should only be used to enforce memory ordering constraints when interacting with device memory.
-// When no device memory is involved, use atomic_thread_fence() from <AK/Atomic.h>.
+// When no device memory is involved, use atomic_thread_fence() from <AK/Fences.h>.
 // atomic_thread_fence() is generally not strong enough when interacting with device memory.
 
 namespace Kernel {

Kernel/Arch/SafeMem.h

@@ -6,7 +6,7 @@
 
 #pragma once
 
-#include <AK/Atomic.h>
+#include <AK/Fences.h>
 #include <AK/Optional.h>
 #include <AK/Types.h>
 

Kernel/Syscalls/futex.cpp

@@ -5,6 +5,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/Fences.h>
 #include <AK/Singleton.h>
 #include <Kernel/Debug.h>
 #include <Kernel/Memory/InodeVMObject.h>

Kernel/Tasks/AtomicEdgeAction.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include <AK/Atomic.h>
+#include <AK/Fences.h>
 #include <Kernel/Arch/Processor.h>
 
 namespace Kernel {