From 9eca2ffd412b2552e153692c31a934c59078de5a Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Mon, 31 Dec 2018 20:25:42 +0100
Subject: [PATCH] Make PhysicalPage eternally allocated.

---
 Kernel/MemoryManager.cpp | 5 +++++
 Kernel/MemoryManager.h   | 8 +++-----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/Kernel/MemoryManager.cpp b/Kernel/MemoryManager.cpp
index fb0e929474..283b5aaf7d 100644
--- a/Kernel/MemoryManager.cpp
+++ b/Kernel/MemoryManager.cpp
@@ -655,6 +655,11 @@ Region::~Region()
     MM.unregister_region(*this);
 }
 
+PhysicalPage::PhysicalPage(PhysicalAddress paddr)
+    : m_paddr(paddr)
+{
+}
+
 void PhysicalPage::return_to_freelist()
 {
     InterruptDisabler disabler;
diff --git a/Kernel/MemoryManager.h b/Kernel/MemoryManager.h
index 3d59789e8a..3c0a6f6408 100644
--- a/Kernel/MemoryManager.h
+++ b/Kernel/MemoryManager.h
@@ -20,10 +20,10 @@ enum class PageFaultResponse {
 };
 
 class PhysicalPage {
+    AK_MAKE_ETERNAL
     friend class MemoryManager;
     friend class PageDirectory;
 public:
-    ~PhysicalPage() { }
     PhysicalAddress paddr() const { return m_paddr; }
 
     void retain()
@@ -42,10 +42,8 @@ public:
     unsigned retain_count() const { return m_retain_count; }
 
 private:
-    PhysicalPage(PhysicalAddress paddr)
-        : m_paddr(paddr)
-    {
-    }
+    explicit PhysicalPage(PhysicalAddress paddr);
+    ~PhysicalPage() = delete;
 
     void return_to_freelist();