Kernel: Extract DeferredCallEntry from Arch/Processor.h

Author: https://github.com/Hendiadyoin1
Commit: https://github.com/SerenityOS/serenity/commit/556b5161829
Pull-request: https://github.com/SerenityOS/serenity/pull/11178

Kernel/Arch/DeferredCallEntry.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020, Tom <tomut@yahoo.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/BitCast.h>
+#include <AK/Function.h>
+
+namespace Kernel {
+
+struct DeferredCallEntry {
+    using HandlerFunction = Function<void()>;
+
+    DeferredCallEntry* next;
+    alignas(HandlerFunction) u8 handler_storage[sizeof(HandlerFunction)];
+    bool was_allocated;
+
+    HandlerFunction& handler_value()
+    {
+        return *bit_cast<HandlerFunction*>(&handler_storage);
+    }
+
+    void invoke_handler()
+    {
+        handler_value()();
+    }
+};
+
+}

Kernel/Arch/Processor.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <AK/Function.h>
+#include <Kernel/Arch/DeferredCallEntry.h>
 
 namespace Kernel {
 
@@ -16,8 +17,6 @@ class PageDirectory;
 }
 
 struct ProcessorMessageEntry;
-struct DeferredCallEntry;
-
 enum class ProcessorSpecificDataID {
     MemoryManager,
     __Count,
@@ -62,24 +61,6 @@ struct ProcessorMessageEntry {
     ProcessorMessage* msg;
 };
 
-struct DeferredCallEntry {
-    using HandlerFunction = Function<void()>;
-
-    DeferredCallEntry* next;
-    alignas(HandlerFunction) u8 handler_storage[sizeof(HandlerFunction)];
-    bool was_allocated;
-
-    HandlerFunction& handler_value()
-    {
-        return *bit_cast<HandlerFunction*>(&handler_storage);
-    }
-
-    void invoke_handler()
-    {
-        handler_value()();
-    }
-};
-
 }
 
 #if ARCH(X86_64) || ARCH(I386)

Kernel/Arch/x86/Processor.h

@@ -11,6 +11,7 @@
 #include <AK/Function.h>
 #include <AK/Types.h>
 
+#include <Kernel/Arch/DeferredCallEntry.h>
 #include <Kernel/Arch/x86/ASM_wrapper.h>
 #include <Kernel/Arch/x86/CPUID.h>
 #include <Kernel/Arch/x86/DescriptorTable.h>