[tkreuzer] 64585: [NTOSKRNL] Small impovement to NtFreeVirtualMemory to make things clearer

Author: tkreuzer
Date: Wed Oct  8 00:30:37 2014
New Revision: 64585

URL: http://svn.reactos.org/svn/reactos?rev=64585&view=rev
Log:
[NTOSKRNL]
Small impovement to NtFreeVirtualMemory to make things clearer

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/virtual.c

Modified: trunk/reactos/ntoskrnl/mm/ARM3/virtual.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/virtual.c…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/virtual.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/virtual.c	[iso-8859-1] Wed Oct  8 00:30:37 2014
@@ -5134,7 +5134,7 @@
     PMEMORY_AREA MemoryArea;
     SIZE_T PRegionSize;
     PVOID PBaseAddress;
-    LONG_PTR CommitReduction = 0;
+    LONG_PTR AlreadyDecommitted, CommitReduction = 0;
     ULONG_PTR StartingAddress, EndingAddress;
     PMMVAD Vad;
     NTSTATUS Status;
@@ -5530,13 +5530,15 @@
     // Decommit the PTEs for the range plus the actual backing pages for the
     // range, then reduce that amount from the commit charge in the VAD
     //
+    AlreadyDecommitted = MiDecommitPages((PVOID)StartingAddress,
+                                         MiAddressToPte(EndingAddress),
+                                         Process,
+                                         Vad);
     CommitReduction = MiAddressToPte(EndingAddress) -
                       MiAddressToPte(StartingAddress) +
                       1 -
-                      MiDecommitPages((PVOID)StartingAddress,
-                                      MiAddressToPte(EndingAddress),
-                                      Process,
-                                      Vad);
+                      AlreadyDecommitted;
+
     ASSERT(CommitReduction >= 0);
     Vad->u.VadFlags.CommitCharge -= CommitReduction;
     ASSERT(Vad->u.VadFlags.CommitCharge >= 0);