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Kernel: Use an IntrusiveRedBlackTree for kernel regions

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We were already using a non-intrusive RedBlackTree, and since the kernel
regions tree is non-owning, this is a trivial conversion that makes a
bunch of the tree operations infallible (by being allocation-free.) :^)
This commit is contained in:
Andreas Kling 2022-01-16 13:10:05 +01:00
parent 66e72ed5e6
commit df34f7b90b
3 changed files with 13 additions and 12 deletions
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7
Kernel/Memory/Region.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -8,6 +8,7 @@
#include <AK/EnumBits.h>
#include <AK/IntrusiveList.h>
#include <AK/IntrusiveRedBlackTree.h>
#include <AK/Weakable.h>
#include <Kernel/Forward.h>
#include <Kernel/KString.h>
@ -219,11 +220,11 @@ private:
bool m_stack : 1 { false };
bool m_mmap : 1 { false };
bool m_syscall_region : 1 { false };
IntrusiveListNode<Region> m_memory_manager_list_node;
IntrusiveRedBlackTreeNode<FlatPtr, Region, RawPtr<Region>> m_tree_node;
IntrusiveListNode<Region> m_vmobject_list_node;
public:
using ListInMemoryManager = IntrusiveList<&Region::m_memory_manager_list_node>;
using ListInVMObject = IntrusiveList<&Region::m_vmobject_list_node>;
};