Kernel: Split the ProcFS core file into smaller components

Author: https://github.com/supercomputer7
Commit: 3906dd3aa3
Pull-request: https://github.com/SerenityOS/serenity/pull/15771
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/bgianfo

Kernel/FileSystem/ProcFS/FileSystem.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Spencer Dixon <spencercdixon@gmail.com>
+ * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/FileSystem/ProcFS/DirectoryInode.h>
+#include <Kernel/FileSystem/ProcFS/FileSystem.h>
+#include <Kernel/ProcessExposed.h>
+
+namespace Kernel {
+
+ErrorOr<NonnullLockRefPtr<FileSystem>> ProcFS::try_create()
+{
+    return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcFS));
+}
+
+ProcFS::ProcFS() = default;
+ProcFS::~ProcFS() = default;
+
+ErrorOr<void> ProcFS::initialize()
+{
+    m_root_inode = static_ptr_cast<ProcFSDirectoryInode>(TRY(ProcFSComponentRegistry::the().root_directory().to_inode(*this)));
+    return {};
+}
+
+Inode& ProcFS::root_inode()
+{
+    return *m_root_inode;
+}
+
+}