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Kernel: Make committed physical page allocation return NonnullRefPtr

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Since we're taking from the committed set of pages, there should never
be a reason for this call to fail.

Also add a Badge to disallow taking committed pages from anywhere but
the Region class.
This commit is contained in:
Andreas Kling 2021-07-22 13:51:40 +02:00
parent d79d768010
commit 0642f8f2c6
3 changed files with 6 additions and 4 deletions
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2
Kernel/VM/AnonymousVMObject.h
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@ -26,7 +26,7 @@ public:
static RefPtr<AnonymousVMObject> try_create_with_physical_pages(Span<NonnullRefPtr<PhysicalPage>>);
virtual RefPtr<VMObject> try_clone() override;
RefPtr<PhysicalPage> allocate_committed_page(size_t);
[[nodiscard]] NonnullRefPtr<PhysicalPage> allocate_committed_page(Badge<Region>, size_t);
PageFaultResponse handle_cow_fault(size_t, VirtualAddress);
size_t cow_pages() const;
bool should_cow(size_t page_index, bool) const;