Kernel: Rename Kernel/VM/ to Kernel/Memory/

This directory isn't just about virtual memory, it's about all kinds
of memory management.

Kernel/Memory/SharedInodeVMObject.cpp

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/FileSystem/Inode.h>
+#include <Kernel/Memory/SharedInodeVMObject.h>
+
+namespace Kernel {
+
+RefPtr<SharedInodeVMObject> SharedInodeVMObject::try_create_with_inode(Inode& inode)
+{
+    size_t size = inode.size();
+    if (auto shared_vmobject = inode.shared_vmobject())
+        return shared_vmobject.release_nonnull();
+    auto vmobject = adopt_ref_if_nonnull(new (nothrow) SharedInodeVMObject(inode, size));
+    if (!vmobject)
+        return nullptr;
+    vmobject->inode().set_shared_vmobject(*vmobject);
+    return vmobject;
+}
+
+RefPtr<VMObject> SharedInodeVMObject::try_clone()
+{
+    return adopt_ref_if_nonnull(new (nothrow) SharedInodeVMObject(*this));
+}
+
+SharedInodeVMObject::SharedInodeVMObject(Inode& inode, size_t size)
+    : InodeVMObject(inode, size)
+{
+}
+
+SharedInodeVMObject::SharedInodeVMObject(SharedInodeVMObject const& other)
+    : InodeVMObject(other)
+{
+}
+
+}