From 108991a6fbae487218812350b1a984887dab084f Mon Sep 17 00:00:00 2001
From: Pierre Schweitzer <pierre@reactos.org>
Date: Tue, 18 Sep 2018 21:42:01 +0200
Subject: [PATCH] [NTOSKRNL] Stub IoInitializeCrashDump()

Also call it from NtCreatePagingFile() when we have successfully created
a paging file on the system boot partition.
---
 ntoskrnl/include/internal/io.h | 6 ++++++
 ntoskrnl/io/iomgr/iomgr.c      | 8 ++++++++
 ntoskrnl/mm/pagefile.c         | 7 +++++++
 3 files changed, 21 insertions(+)

diff --git a/ntoskrnl/include/internal/io.h b/ntoskrnl/include/internal/io.h
index f47768d4a1a..83fe7ce3c7b 100644
--- a/ntoskrnl/include/internal/io.h
+++ b/ntoskrnl/include/internal/io.h
@@ -797,6 +797,12 @@ IopVerifyDiskSignature(
     OUT PULONG Signature
 );
 
+BOOLEAN
+NTAPI
+IoInitializeCrashDump(
+    IN HANDLE PageFileHandle
+);
+
 //
 // Device/Volume Routines
 //
diff --git a/ntoskrnl/io/iomgr/iomgr.c b/ntoskrnl/io/iomgr/iomgr.c
index 47defcab70e..292c947036d 100644
--- a/ntoskrnl/io/iomgr/iomgr.c
+++ b/ntoskrnl/io/iomgr/iomgr.c
@@ -651,4 +651,12 @@ IoInitSystem(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
     return TRUE;
 }
 
+BOOLEAN
+NTAPI
+IoInitializeCrashDump(IN HANDLE PageFileHandle)
+{
+    UNIMPLEMENTED;
+    return FALSE;
+}
+
 /* EOF */
diff --git a/ntoskrnl/mm/pagefile.c b/ntoskrnl/mm/pagefile.c
index 0649f0f2c2f..d05580bfbd3 100644
--- a/ntoskrnl/mm/pagefile.c
+++ b/ntoskrnl/mm/pagefile.c
@@ -89,6 +89,8 @@ C_ASSERT(FILE_FROM_ENTRY(0xffffffff) < MAX_PAGING_FILES);
 
 static BOOLEAN MmSwapSpaceMessage = FALSE;
 
+static BOOLEAN MmSystemPageFileLocated = FALSE;
+
 /* FUNCTIONS *****************************************************************/
 
 VOID
@@ -804,6 +806,11 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
 
     MmSwapSpaceMessage = FALSE;
 
+    if (!MmSystemPageFileLocated && BooleanFlagOn(FileObject->DeviceObject->Flags, DO_SYSTEM_BOOT_PARTITION))
+    {
+        MmSystemPageFileLocated = IoInitializeCrashDump(FileHandle);
+    }
+
     return STATUS_SUCCESS;
 }