From 0f6f0fe19a6278edc6b2acd73628b1c59a3cc995 Mon Sep 17 00:00:00 2001
From: Dmitry Gorbachev <gorbachev@reactos.org>
Date: Sun, 15 Mar 2009 01:23:47 +0000
Subject: [PATCH] Trying to use r39938 variant again...

svn path=/trunk/; revision=40020
---
 reactos/ntoskrnl/mm/hypermap.c | 36 ++++++----------------------------
 1 file changed, 6 insertions(+), 30 deletions(-)

diff --git a/reactos/ntoskrnl/mm/hypermap.c b/reactos/ntoskrnl/mm/hypermap.c
index fbdc03e32a7..448e1189631 100644
--- a/reactos/ntoskrnl/mm/hypermap.c
+++ b/reactos/ntoskrnl/mm/hypermap.c
@@ -139,7 +139,6 @@ MiMapPageToZeroInHyperSpace(IN PFN_NUMBER Page)
 {
     MMPTE TempPte;
     PMMPTE PointerPte;
-    PFN_NUMBER Offset;
     PVOID Address; 
 
     //
@@ -154,47 +153,24 @@ MiMapPageToZeroInHyperSpace(IN PFN_NUMBER Page)
     TempPte.u.Hard.PageFrameNumber = Page;
 
     //
-    // Pick the first zeroing PTE
+    // Get the Zero PTE and its address
     //
-    PointerPte = MmFirstReservedZeroingPte;
+    PointerPte = MiAddressToPte(MI_ZERO_PTE);
+    Address = (PVOID)((ULONG_PTR)PointerPte << 10);
 
     //
-    // Now get the first free PTE
+    // Invalidate the old address
     //
-    Offset = PFN_FROM_PTE(PointerPte);
-    if (!Offset)
-    {
-        //
-        // Reset the PTEs
-        //
-        Offset = MI_ZEROING_PTES;
-        KeFlushProcessTb();
-    }
-
-    //
-    // Prepare the next PTE
-    //
-    PointerPte->u.Hard.PageFrameNumber = Offset - 1;
+    __invlpg(Address);
 
     //
     // Write the current PTE
     //
-    PointerPte += Offset;
+    TempPte.u.Hard.PageFrameNumber = Page;
     *PointerPte = TempPte;
 
     //
     // Return the address
     //
-    Address = (PVOID)((ULONG_PTR)PointerPte << 10);
     return Address;
 }
-
-VOID
-NTAPI
-MiUnmapPageInZeroSpace(IN PVOID Address)
-{
-    //
-    // Blow away the mapping
-    //
-    MiAddressToPte(Address)->u.Long = 0;
-}