From 3e1f57f67cb15fb88571715e119efc20dc70fda0 Mon Sep 17 00:00:00 2001
From: Aiken Harris <harraiken91@gmail.com>
Date: Tue, 3 Mar 2026 08:51:22 +0100
Subject: [PATCH] Improve type safety of physical page boundaries
 initialization

---
 xtoskrnl/mm/pfn.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/xtoskrnl/mm/pfn.cc b/xtoskrnl/mm/pfn.cc
index e88ee22..be4cdc3 100644
--- a/xtoskrnl/mm/pfn.cc
+++ b/xtoskrnl/mm/pfn.cc
@@ -1146,9 +1146,9 @@ MM::Pfn::ScanMemoryDescriptors(VOID)
     PLOADER_MEMORY_DESCRIPTOR MemoryDescriptor;
     PFN_NUMBER FreePages;
 
-    /* Initialize the lowest and highest physical page numbers */
-    LowestPhysicalPage = ~0;
-    HighestPhysicalPage = 0;
+    /* Initialize the highest and lowest physical page numbers */
+    HighestPhysicalPage = (ULONG_PTR)0;
+    LowestPhysicalPage = (ULONG_PTR)~0;
 
     /* Initially, set number of free pages to 0 */
     FreePages = 0;