[mbosma] 23217: remove locking in section.c

Author: mbosma
Date: Sat Jul 22 00:32:51 2006
New Revision: 23217

URL: http://svn.reactos.org/svn/reactos?rev=23217&view=rev
Log:
remove locking in section.c

Modified:
    branches/cache_manager_rewrite/mm/section.c

Modified: branches/cache_manager_rewrite/mm/section.c
URL: http://svn.reactos.org/svn/reactos/branches/cache_manager_rewrite/mm/section...
==============================================================================
--- branches/cache_manager_rewrite/mm/section.c (original)
+++ branches/cache_manager_rewrite/mm/section.c Sat Jul 22 00:32:51 2006
@@ -165,22 +165,6 @@
    KeSetEvent(&PageOp->CompletionEvent, IO_NO_INCREMENT, FALSE);
    MmReleasePageOp(PageOp);
 }
-
-
-/*
- * FUNCTION:  Waits in kernel mode indefinitely for a file object lock.
- * ARGUMENTS: PFILE_OBJECT to wait for.
- * RETURNS:   Status of the wait.
- */
-static NTSTATUS
-MmspWaitForFileLock(PFILE_OBJECT File)
-{
-	if(File->Flags & FO_SYNCHRONOUS_IO)
-		return KeWaitForSingleObject(&File->Lock, 0, KernelMode, FALSE, NULL);
-	else 
-		return 0;
-}
-

VOID
 MmFreePageTablesSectionSegment(PMM_SECTION_SEGMENT Segment)
@@ -3556,18 +3540,6 @@
       RtlZeroMemory(&Segment->PageDirectory, sizeof(SECTION_PAGE_DIRECTORY));

/*
-       * Lock the file
-       */
-      Status = MmspWaitForFileLock(FileObject);
-      if (Status != STATUS_SUCCESS)
-      {
-         ExFreePool(Segment);
-         ObDereferenceObject(Section);
-         ObDereferenceObject(FileObject);
-         return(Status);
-      }
-
-      /*
        * Set the lock before assigning the segment to the file object
        */
       ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&DataSectionObjectLock);
@@ -3601,20 +3573,6 @@
    }
    else
    {
-      /*
-       * Lock the file
-       */
-      Status = MmspWaitForFileLock(FileObject);
-      if (Status != STATUS_SUCCESS)
-      {
-         ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&DataSectionObjectLock);
-         Segment->ReferenceCount--;
-         ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&DataSectionObjectLock);
-         ObDereferenceObject(Section);
-         ObDereferenceObject(FileObject);
-         return(Status);
-      }
-
       Section->Segment = Segment;
       ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&DataSectionObjectLock);
       MmLockSectionSegment(Segment);
@@ -4418,19 +4376,6 @@

Section->ImageSection = ImageSectionObject;
       ASSERT(ImageSectionObject->Segments);
-
-      /*
-       * Lock the file
-       */
-      Status = MmspWaitForFileLock(FileObject);
-      if (!NT_SUCCESS(Status))
-      {
-         ExFreePool(ImageSectionObject->Segments);
-         ExFreePool(ImageSectionObject);
-         ObDereferenceObject(Section);
-         ObDereferenceObject(FileObject);
-         return(Status);
-      }

ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&ImageSectionObjectLock);
       tmpImageSectionObject = InterlockedCompareExchangePointer(&FileObject->SectionObjectPointer->ImageSectionObject,
@@ -4472,20 +4417,6 @@
    }
    else
    {
-      /*
-       * Lock the file
-       */
-      Status = MmspWaitForFileLock(FileObject);
-      if (Status != STATUS_SUCCESS)
-      {
-         ObDereferenceObject(Section);
-         ObDereferenceObject(FileObject);
-         ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&ImageSectionObjectLock);
-         ImageSectionObject->RefCount--;
-         ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&ImageSectionObjectLock);
-         return(Status);
-      }
-
       Section->ImageSection = ImageSectionObject;
       SectionSegments = ImageSectionObject->Segments;