diff --git a/reactos/ntoskrnl/cache/cachesub.c b/reactos/ntoskrnl/cache/cachesub.c
index 6f816cba0dd..b59af8f1f47 100644
--- a/reactos/ntoskrnl/cache/cachesub.c
+++ b/reactos/ntoskrnl/cache/cachesub.c
@@ -143,7 +143,7 @@ _CcpFlushCache(IN PNOCC_CACHE_MAP Map,
     PNOCC_BCB Bcb = NULL;
 	LARGE_INTEGER LowerBound, UpperBound;
 	PLIST_ENTRY ListEntry;
-    IO_STATUS_BLOCK IOSB = { };
+    IO_STATUS_BLOCK IOSB = {0};
 
 	DPRINT1("CcFlushCache (while file) (%s:%d)\n", File, Line);
 
@@ -164,7 +164,7 @@ _CcpFlushCache(IN PNOCC_CACHE_MAP Map,
 	while (ListEntry != &Map->AssociatedBcb)
 	{
 		Bcb = CONTAINING_RECORD(ListEntry, NOCC_BCB, ThisFileList);
-		CcpReferenceCache(Bcb - CcCacheSections);
+		CcpReferenceCache((ULONG)(Bcb - CcCacheSections));
 
 		if (Bcb->FileOffset.QuadPart + Bcb->Length >= LowerBound.QuadPart &&
 			Bcb->FileOffset.QuadPart < UpperBound.QuadPart)
@@ -186,7 +186,7 @@ _CcpFlushCache(IN PNOCC_CACHE_MAP Map,
 			if (Delete && Bcb->RefCount < 2)
 			{
 				Bcb->RefCount = 1;
-				CcpDereferenceCache(Bcb - CcCacheSections, FALSE);
+				CcpDereferenceCache((ULONG)(Bcb - CcCacheSections), FALSE);
 			}
 			else
 				CcpUnpinData(Bcb, TRUE);
@@ -276,9 +276,10 @@ PVOID
 NTAPI
 CcRemapBcb(IN PVOID Bcb)
 {
+	ULONG Number = (ULONG)(((PNOCC_BCB)Bcb) - CcCacheSections);
 	CcpLock();
-	ASSERT(RtlTestBit(CcCacheBitmap, ((PNOCC_BCB)Bcb) - CcCacheSections));
-	CcpReferenceCache(((PNOCC_BCB)Bcb) - CcCacheSections);
+	ASSERT(RtlTestBit(CcCacheBitmap, Number));
+	CcpReferenceCache(Number);
 	CcpUnlock();
     return Bcb;
 }
@@ -315,10 +316,11 @@ VOID
 NTAPI
 CcRepinBcb(IN PVOID Bcb)
 {
+	ULONG Number = (ULONG)(((PNOCC_BCB)Bcb) - CcCacheSections);
 	CcpLock();
-	ASSERT(RtlTestBit(CcCacheBitmap, ((PNOCC_BCB)Bcb) - CcCacheSections));
-	DPRINT("CcRepinBcb(#%x)\n", ((PNOCC_BCB)Bcb) - CcCacheSections);
-	CcpReferenceCache(((PNOCC_BCB)Bcb) - CcCacheSections);
+	ASSERT(RtlTestBit(CcCacheBitmap, Number));
+	DPRINT("CcRepinBcb(#%x)\n", Number);
+	CcpReferenceCache(Number);
 	CcpUnlock();
 }
 
diff --git a/reactos/ntoskrnl/cache/fssup.c b/reactos/ntoskrnl/cache/fssup.c
index 4af45ec85f1..a501c6e6fc5 100644
--- a/reactos/ntoskrnl/cache/fssup.c
+++ b/reactos/ntoskrnl/cache/fssup.c
@@ -297,9 +297,11 @@ CcSetFileSizes(IN PFILE_OBJECT FileObject,
                IN PCC_FILE_SIZES FileSizes)
 {
     PNOCC_CACHE_MAP Map = (PNOCC_CACHE_MAP)FileObject->SectionObjectPointer->SharedCacheMap;
+    PNOCC_BCB Bcb;
+
     if (!Map) return;
     Map->FileSizes = *FileSizes;
-	PNOCC_BCB Bcb = Map->AssociatedBcb.Flink == &Map->AssociatedBcb ? 
+	Bcb = Map->AssociatedBcb.Flink == &Map->AssociatedBcb ?
 		NULL : CONTAINING_RECORD(Map->AssociatedBcb.Flink, NOCC_BCB, ThisFileList);
 	if (!Bcb) return;
 	MmExtendCacheSection(Bcb->SectionObject, &FileSizes->FileSize, FALSE);
diff --git a/reactos/ntoskrnl/cache/pinsup.c b/reactos/ntoskrnl/cache/pinsup.c
index c2a46398306..46605a7fade 100644
--- a/reactos/ntoskrnl/cache/pinsup.c
+++ b/reactos/ntoskrnl/cache/pinsup.c
@@ -318,6 +318,8 @@ CcpMapData
     PMM_CACHE_SECTION_SEGMENT SectionObject = NULL;
     NTSTATUS Status;
 	PNOCC_CACHE_MAP Map = (PNOCC_CACHE_MAP)FileObject->SectionObjectPointer->SharedCacheMap;
+	ULONG SectionSize;
+	ULONG ViewSize = CACHE_STRIPE;
 
 	if (!Map)
 	{
@@ -358,8 +360,6 @@ CcpMapData
 		goto cleanup;
 	}
 
-	ULONG SectionSize;
-	
 	DPRINT("File size %08x%08x\n", Map->FileSizes.ValidDataLength.HighPart, Map->FileSizes.ValidDataLength.LowPart);
 	
 	if (Map->FileSizes.ValidDataLength.QuadPart)
@@ -424,7 +424,6 @@ retry:
     }
 	
     DPRINT("Selected BCB #%x\n", BcbHead);
-	ULONG ViewSize = CACHE_STRIPE;
 
     Bcb = &CcCacheSections[BcbHead];
 	Status = MmMapCacheViewInSystemSpaceAtOffset
diff --git a/reactos/ntoskrnl/cache/section/fault.c b/reactos/ntoskrnl/cache/section/fault.c
index 204c264b579..b655f0745df 100644
--- a/reactos/ntoskrnl/cache/section/fault.c
+++ b/reactos/ntoskrnl/cache/section/fault.c
@@ -266,12 +266,13 @@ MiCowCacheSectionPage
            Region->Protect == PAGE_EXECUTE_READWRITE)
 #endif
        {
+           ULONG Entry;
            DPRINTC("setting non-cow page %x %x:%x offset %x (%x) to writable\n", Segment, Process, PAddress, Offset.u.LowPart, MmGetPfnForProcess(Process, Address));
            if (Segment->FileObject)
            {
                DPRINTC("file %wZ\n", &Segment->FileObject->FileName);
            }
-           ULONG Entry = MiGetPageEntryCacheSectionSegment(Segment, &Offset);
+           Entry = MiGetPageEntryCacheSectionSegment(Segment, &Offset);
            DPRINT("Entry %x\n", Entry);
            if (Entry &&
                !IS_SWAP_FROM_SSE(Entry) &&
@@ -478,7 +479,7 @@ MmpSectionAccessFaultInner
 	  {
 		  if (Thread->ActiveFaultCount > 0)
 		  {
-			  WORK_QUEUE_WITH_CONTEXT Context = { };
+			  WORK_QUEUE_WITH_CONTEXT Context = {0};
 			  DPRINT("Already fault handling ... going to work item (%x)\n", Address);
 			  Context.AddressSpace = AddressSpace;
 			  Context.MemoryArea = MemoryArea;
@@ -659,7 +660,7 @@ MmNotPresentFaultCacheSectionInner
 		{
 			if (Thread->ActiveFaultCount > 1)
 			{
-				WORK_QUEUE_WITH_CONTEXT Context = { };
+				WORK_QUEUE_WITH_CONTEXT Context = {0};
 				DPRINTC("Already fault handling ... going to work item (%x)\n", Address);
 				Context.AddressSpace = AddressSpace;
 				Context.MemoryArea = MemoryArea;
diff --git a/reactos/ntoskrnl/cache/section/newmm.h b/reactos/ntoskrnl/cache/section/newmm.h
index e11db95cf7d..f4671e324f0 100644
--- a/reactos/ntoskrnl/cache/section/newmm.h
+++ b/reactos/ntoskrnl/cache/section/newmm.h
@@ -19,7 +19,7 @@
 #define MEMORY_AREA_CACHE   (2)
 #define MM_SEGMENT_FINALIZE (0x40000000)
 
-#define RMAP_SEGMENT_MASK ~0xff
+#define RMAP_SEGMENT_MASK ~((ULONG_PTR)0xff)
 #define RMAP_IS_SEGMENT(x) (((ULONG_PTR)(x) & RMAP_SEGMENT_MASK) == RMAP_SEGMENT_MASK)
 
 #define MIN(x,y) (((x)<(y))?(x):(y))
diff --git a/reactos/ntoskrnl/cache/section/sptab.c b/reactos/ntoskrnl/cache/section/sptab.c
index 0b71764b865..45098290360 100644
--- a/reactos/ntoskrnl/cache/section/sptab.c
+++ b/reactos/ntoskrnl/cache/section/sptab.c
@@ -107,7 +107,7 @@ MiSectionPageTableGetOrAllocate
         MiSectionPageTableGet(Table, FileOffset);
     if (!PageTableSlice)
     {
-		CACHE_SECTION_PAGE_TABLE SectionZeroPageTable = { };
+		CACHE_SECTION_PAGE_TABLE SectionZeroPageTable = {0};
         SearchFileOffset.QuadPart = ROUND_DOWN(FileOffset->QuadPart, ENTRIES_PER_ELEMENT * PAGE_SIZE);
         SectionZeroPageTable.FileOffset = SearchFileOffset;
         SectionZeroPageTable.Refcount = 1;
diff --git a/reactos/ntoskrnl/cache/section/swapout.c b/reactos/ntoskrnl/cache/section/swapout.c
index 691635dc58d..1e1cc9188e1 100644
--- a/reactos/ntoskrnl/cache/section/swapout.c
+++ b/reactos/ntoskrnl/cache/section/swapout.c
@@ -422,6 +422,8 @@ bail:
 
    if (Segment)
    {
+	   ULONG RefCount;
+
 	   DPRINTC("About to finalize section page %x (%x:%x) Status %x %s\n", Page, Segment, FileOffset.LowPart, Status, Dirty ? "dirty" : "clean");
 
 	   if (!NT_SUCCESS(Status) ||
@@ -438,7 +440,6 @@ bail:
 	   }
 
 	   // Alas, we had the last reference
-	   ULONG RefCount;
 	   if ((RefCount = InterlockedDecrementUL(&Segment->ReferenceCount)) == 0)
 		   MmFinalizeSegment(Segment);
    }
diff --git a/reactos/ntoskrnl/mm/section.c b/reactos/ntoskrnl/mm/section.c
index bde920327c8..00556d82fe9 100644
--- a/reactos/ntoskrnl/mm/section.c
+++ b/reactos/ntoskrnl/mm/section.c
@@ -1290,7 +1290,8 @@ MiReadPage(PMEMORY_AREA MemoryArea,
  *       Page - Variable that receives a page contains the read data.
  */
 {
-   MM_REQUIRED_RESOURCES Resources = { };
+   MM_REQUIRED_RESOURCES Resources = {0};
+   NTSTATUS Status;
 
    Resources.Context = MemoryArea->Data.SectionData.Section->FileObject;
    Resources.FileOffset.QuadPart = SegOffset +
@@ -1300,7 +1301,7 @@ MiReadPage(PMEMORY_AREA MemoryArea,
 
    DPRINT1("%S, offset %x, len %d, page %x\n", ((PFILE_OBJECT)Resources.Context)->FileName.Buffer, Resources.FileOffset.LowPart, Resources.Amount, Resources.Page[0]);
 
-   NTSTATUS Status = MiReadFilePage(NULL, NULL, &Resources);
+   Status = MiReadFilePage(NULL, NULL, &Resources);
    *Page = Resources.Page[0];
    return Status;
 }