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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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5
Kernel/Memory/MemoryManager.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/Concepts.h>
#include <AK/HashTable.h>
#include <AK/IntrusiveRedBlackTree.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtrVector.h>
#include <Kernel/Forward.h>
@ -293,7 +294,7 @@ private:
PhysicalPageEntry* m_physical_page_entries { nullptr };
size_t m_physical_page_entries_count { 0 };
RedBlackTree<FlatPtr, Region*> m_kernel_regions;
IntrusiveRedBlackTree<&Region::m_tree_node> m_kernel_regions;
Vector<UsedMemoryRange> m_used_memory_ranges;
Vector<PhysicalMemoryRange> m_physical_memory_ranges;