[reactos] 02/04: [NTOS:MM] Increment Prcb->MmDemandZeroCount while holding the Pfn lock

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=2eff510074aec9c843e19…

commit 2eff510074aec9c843e196364f0f9b4bd7ce3d61
Author: Timo Kreuzer <timo.kreuzer(a)reactos.org>
AuthorDate: Wed Dec 27 15:09:39 2017 +0100

    [NTOS:MM] Increment Prcb->MmDemandZeroCount while holding the Pfn lock
---
 ntoskrnl/mm/ARM3/pagfault.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/ntoskrnl/mm/ARM3/pagfault.c b/ntoskrnl/mm/ARM3/pagfault.c
index b2dd08cdda..f37fa458d2 100644
--- a/ntoskrnl/mm/ARM3/pagfault.c
+++ b/ntoskrnl/mm/ARM3/pagfault.c
@@ -669,6 +669,9 @@ MiResolveDemandZeroFault(IN PVOID Address,
     /* Initialize it */
     MiInitializePfn(PageFrameNumber, PointerPte, TRUE);
 
+    /* Increment demand zero faults */
+    KeGetCurrentPrcb()->MmDemandZeroCount++;
+
     /* Do we have the lock? */
     if (HaveLock)
     {
@@ -679,9 +682,6 @@ MiResolveDemandZeroFault(IN PVOID Address,
         if (Process > HYDRA_PROCESS) Process->NumberOfPrivatePages++;
     }
 
-    /* Increment demand zero faults */
-    InterlockedIncrement(&KeGetCurrentPrcb()->MmDemandZeroCount);
-
     /* Zero the page if need be */
     if (NeedZero) MiZeroPfn(PageFrameNumber);
 
@@ -2297,14 +2297,14 @@ UserFault:
             /* Initialize the PFN entry now */
             MiInitializePfn(PageFrameIndex, PointerPte, 1);
 
-            /* And we're done with the lock */
-            MiReleasePfnLock(OldIrql);
-
             /* Increment the count of pages in the process */
             CurrentProcess->NumberOfPrivatePages++;
 
             /* One more demand-zero fault */
-            InterlockedIncrement(&KeGetCurrentPrcb()->MmDemandZeroCount);
+            KeGetCurrentPrcb()->MmDemandZeroCount++;
+
+            /* And we're done with the lock */
+            MiReleasePfnLock(OldIrql);
 
             /* Fault on user PDE, or fault on user PTE? */
             if (PointerPte <= MiHighestUserPte)