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Kernel: Remove "supervisor" bit from PhysicalPage

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Instead of each PhysicalPage knowing whether it comes from the
supervisor pages or from the user pages, we can just check in both
sets when freeing a page.

It's just a handful of pointer range checks, nothing expensive.
This commit is contained in:
Andreas Kling 2021-07-11 23:12:32 +02:00
parent ac78f1e812
commit c2792212f4
9 changed files with 39 additions and 53 deletions
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5
Kernel/VM/PhysicalPage.h
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@ -32,7 +32,7 @@ public:
free_this();
}
static NonnullRefPtr<PhysicalPage> create(PhysicalAddress, bool supervisor, bool may_return_to_freelist = true);
static NonnullRefPtr<PhysicalPage> create(PhysicalAddress, bool may_return_to_freelist = true);
u32 ref_count() const { return m_ref_count.load(AK::memory_order_consume); }
@ -40,14 +40,13 @@ public:
bool is_lazy_committed_page() const;
private:
PhysicalPage(bool supervisor, bool may_return_to_freelist = true);
explicit PhysicalPage(bool may_return_to_freelist = true);
~PhysicalPage() = default;
void free_this();
Atomic<u32> m_ref_count { 1 };
bool m_may_return_to_freelist { true };
bool m_supervisor { false };
};
struct PhysicalPageEntry {