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Kernel: Use RefPtr instead of LockRefPtr for PhysicalPage

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I believe this to be safe, as the main thing that LockRefPtr provides
over RefPtr is safe copying from a shared LockRefPtr instance. I've
inspected the uses of RefPtr<PhysicalPage> and it seems they're all
guarded by external locking. Some of it is less obvious, but this is
an area where we're making continuous headway.
This commit is contained in:
Andreas Kling 2022-08-24 15:56:26 +02:00
parent 5a804b9a1d
commit 2c72d495a3
33 changed files with 141 additions and 138 deletions
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26
Kernel/Memory/SharedFramebufferVMObject.h
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@ -22,15 +22,15 @@ public:
static ErrorOr<NonnullLockRefPtr<FakeWritesFramebufferVMObject>> try_create(Badge<SharedFramebufferVMObject>, SharedFramebufferVMObject const& parent_object);
private:
FakeWritesFramebufferVMObject(SharedFramebufferVMObject const& parent_object, FixedArray<LockRefPtr<PhysicalPage>>&& new_physical_pages)
FakeWritesFramebufferVMObject(SharedFramebufferVMObject const& parent_object, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages)
: VMObject(move(new_physical_pages))
, m_parent_object(parent_object)
{
}
virtual StringView class_name() const override { return "FakeWritesFramebufferVMObject"sv; }
virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override { return Error::from_errno(ENOTIMPL); }
virtual Span<LockRefPtr<PhysicalPage> const> physical_pages() const override { return m_parent_object->fake_sink_framebuffer_physical_pages(); }
virtual Span<LockRefPtr<PhysicalPage>> physical_pages() override { return m_parent_object->fake_sink_framebuffer_physical_pages(); }
virtual Span<RefPtr<PhysicalPage> const> physical_pages() const override { return m_parent_object->fake_sink_framebuffer_physical_pages(); }
virtual Span<RefPtr<PhysicalPage>> physical_pages() override { return m_parent_object->fake_sink_framebuffer_physical_pages(); }
NonnullLockRefPtr<SharedFramebufferVMObject> m_parent_object;
};
@ -39,15 +39,15 @@ public:
static ErrorOr<NonnullLockRefPtr<RealWritesFramebufferVMObject>> try_create(Badge<SharedFramebufferVMObject>, SharedFramebufferVMObject const& parent_object);
private:
RealWritesFramebufferVMObject(SharedFramebufferVMObject const& parent_object, FixedArray<LockRefPtr<PhysicalPage>>&& new_physical_pages)
RealWritesFramebufferVMObject(SharedFramebufferVMObject const& parent_object, FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages)
: VMObject(move(new_physical_pages))
, m_parent_object(parent_object)
{
}
virtual StringView class_name() const override { return "RealWritesFramebufferVMObject"sv; }
virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override { return Error::from_errno(ENOTIMPL); }
virtual Span<LockRefPtr<PhysicalPage> const> physical_pages() const override { return m_parent_object->real_framebuffer_physical_pages(); }
virtual Span<LockRefPtr<PhysicalPage>> physical_pages() override { return m_parent_object->real_framebuffer_physical_pages(); }
virtual Span<RefPtr<PhysicalPage> const> physical_pages() const override { return m_parent_object->real_framebuffer_physical_pages(); }
virtual Span<RefPtr<PhysicalPage>> physical_pages() override { return m_parent_object->real_framebuffer_physical_pages(); }
NonnullLockRefPtr<SharedFramebufferVMObject> m_parent_object;
};
@ -60,14 +60,14 @@ public:
void switch_to_fake_sink_framebuffer_writes(Badge<Kernel::DisplayConnector>);
void switch_to_real_framebuffer_writes(Badge<Kernel::DisplayConnector>);
virtual Span<LockRefPtr<PhysicalPage> const> physical_pages() const override;
virtual Span<LockRefPtr<PhysicalPage>> physical_pages() override;
virtual Span<RefPtr<PhysicalPage> const> physical_pages() const override;
virtual Span<RefPtr<PhysicalPage>> physical_pages() override;
Span<LockRefPtr<PhysicalPage>> fake_sink_framebuffer_physical_pages();
Span<LockRefPtr<PhysicalPage> const> fake_sink_framebuffer_physical_pages() const;
Span<RefPtr<PhysicalPage>> fake_sink_framebuffer_physical_pages();
Span<RefPtr<PhysicalPage> const> fake_sink_framebuffer_physical_pages() const;
Span<LockRefPtr<PhysicalPage>> real_framebuffer_physical_pages();
Span<LockRefPtr<PhysicalPage> const> real_framebuffer_physical_pages() const;
Span<RefPtr<PhysicalPage>> real_framebuffer_physical_pages();
Span<RefPtr<PhysicalPage> const> real_framebuffer_physical_pages() const;
FakeWritesFramebufferVMObject const& fake_writes_framebuffer_vmobject() const { return *m_fake_writes_framebuffer_vmobject; }
FakeWritesFramebufferVMObject& fake_writes_framebuffer_vmobject() { return *m_fake_writes_framebuffer_vmobject; }
@ -76,7 +76,7 @@ public:
RealWritesFramebufferVMObject& real_writes_framebuffer_vmobject() { return *m_real_writes_framebuffer_vmobject; }
private:
SharedFramebufferVMObject(FixedArray<LockRefPtr<PhysicalPage>>&& new_physical_pages, CommittedPhysicalPageSet, AnonymousVMObject& real_framebuffer_vmobject);
SharedFramebufferVMObject(FixedArray<RefPtr<PhysicalPage>>&& new_physical_pages, CommittedPhysicalPageSet, AnonymousVMObject& real_framebuffer_vmobject);
virtual StringView class_name() const override { return "SharedFramebufferVMObject"sv; }