[reactos] 10/12: [NTOS:KE] Explicitly use IOPM_SIZE for initializing the IO map, that is indeed also equal to PAGE_SIZE * 2 but is self-documented.

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=03a9ccce651b2803f5866…

commit 03a9ccce651b2803f5866ba3b8b2a4746a9c5ccf
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Sun Nov 24 22:56:55 2019 +0100
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Mon Nov 25 00:41:54 2019 +0100

    [NTOS:KE] Explicitly use IOPM_SIZE for initializing the IO map, that is indeed also
equal to PAGE_SIZE * 2 but is self-documented.
---
 ntoskrnl/ke/amd64/kiinit.c | 6 +++---
 ntoskrnl/ke/i386/kiinit.c  | 4 ++--
 ntoskrnl/ke/i386/v86vdm.c  | 6 +++---
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/ntoskrnl/ke/amd64/kiinit.c b/ntoskrnl/ke/amd64/kiinit.c
index adeac8fdf5a..74623c1a2ca 100644
--- a/ntoskrnl/ke/amd64/kiinit.c
+++ b/ntoskrnl/ke/amd64/kiinit.c
@@ -75,12 +75,12 @@ KiInitMachineDependent(VOID)
 
 //        /* Allocate the IOPM save area */
 //        Ki386IopmSaveArea = ExAllocatePoolWithTag(PagedPool,
-//                                                  PAGE_SIZE * 2,
-//                                                  TAG('K', 'e', '
', ' '));
+//                                                  IOPM_SIZE,
+//                                                  '  eK');
 //        if (!Ki386IopmSaveArea)
 //        {
 //            /* Bugcheck. We need this for V86/VDM support. */
-//            KeBugCheckEx(NO_PAGES_AVAILABLE, 2, PAGE_SIZE * 2, 0, 0);
+//            KeBugCheckEx(NO_PAGES_AVAILABLE, 2, IOPM_SIZE, 0, 0);
 //        }
 
 }
diff --git a/ntoskrnl/ke/i386/kiinit.c b/ntoskrnl/ke/i386/kiinit.c
index 230ee5235fb..7fc38067730 100644
--- a/ntoskrnl/ke/i386/kiinit.c
+++ b/ntoskrnl/ke/i386/kiinit.c
@@ -590,12 +590,12 @@ KiInitializeKernel(IN PKPROCESS InitProcess,
 
         /* Allocate the IOPM save area */
         Ki386IopmSaveArea = ExAllocatePoolWithTag(PagedPool,
-                                                  PAGE_SIZE * 2,
+                                                  IOPM_SIZE,
                                                   '  eK');
         if (!Ki386IopmSaveArea)
         {
             /* Bugcheck. We need this for V86/VDM support. */
-            KeBugCheckEx(NO_PAGES_AVAILABLE, 2, PAGE_SIZE * 2, 0, 0);
+            KeBugCheckEx(NO_PAGES_AVAILABLE, 2, IOPM_SIZE, 0, 0);
         }
     }
 
diff --git a/ntoskrnl/ke/i386/v86vdm.c b/ntoskrnl/ke/i386/v86vdm.c
index d1c030acc0c..e629f8bb44e 100644
--- a/ntoskrnl/ke/i386/v86vdm.c
+++ b/ntoskrnl/ke/i386/v86vdm.c
@@ -668,8 +668,8 @@ Ke386CallBios(IN ULONG Int,
     /* Make sure there's space for two IOPMs, then copy & clear the current */
     ASSERT(((PKIPCR)KeGetPcr())->GDT[KGDT_TSS / 8].LimitLow >=
             (0x2000 + IOPM_OFFSET - 1));
-    RtlCopyMemory(Ki386IopmSaveArea, &Tss->IoMaps[0].IoMap, PAGE_SIZE * 2);
-    RtlZeroMemory(&Tss->IoMaps[0].IoMap, PAGE_SIZE * 2);
+    RtlCopyMemory(Ki386IopmSaveArea, &Tss->IoMaps[0].IoMap, IOPM_SIZE);
+    RtlZeroMemory(&Tss->IoMaps[0].IoMap, IOPM_SIZE);
 
     /* Save the old offset and base, and set the new ones */
     OldOffset = Process->IopmOffset;
@@ -681,7 +681,7 @@ Ke386CallBios(IN ULONG Int,
     Ki386SetupAndExitToV86Mode(VdmTeb);
 
     /* Restore IOPM */
-    RtlCopyMemory(&Tss->IoMaps[0].IoMap, Ki386IopmSaveArea, PAGE_SIZE * 2);
+    RtlCopyMemory(&Tss->IoMaps[0].IoMap, Ki386IopmSaveArea, IOPM_SIZE);
     Process->IopmOffset = OldOffset;
     Tss->IoMapBase = OldBase;