[navaraf] 13357: Hervé Poussineau <[e-mail]>

Hervé Poussineau [e-mail]
Use fast mutexes instead of spin locks because the file system callbacks
shouldn't be called at DISPATCH_LEVEL.
Modified: trunk/reactos/ntoskrnl/io/fs.c
  _____

Modified: trunk/reactos/ntoskrnl/io/fs.c
--- trunk/reactos/ntoskrnl/io/fs.c	2005-01-28 21:04:12 UTC (rev
13356)
+++ trunk/reactos/ntoskrnl/io/fs.c	2005-01-28 21:17:11 UTC (rev
13357)
@@ -1,4 +1,4 @@

-/* $Id:$
+/* $Id$
  * 
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS kernel
@@ -35,7 +35,7 @@
 static ERESOURCE FileSystemListLock;
 static LIST_ENTRY FileSystemListHead;

-static KSPIN_LOCK FsChangeNotifyListLock;
+static FAST_MUTEX FsChangeNotifyListLock;
 static LIST_ENTRY FsChangeNotifyListHead;

#define TAG_FILE_SYSTEM       TAG('F', 'S', 'Y', 'S')
@@ -178,7 +178,7 @@
   ExInitializeResourceLite(&FileSystemListLock);

InitializeListHead(&FsChangeNotifyListHead);
-  KeInitializeSpinLock(&FsChangeNotifyListLock);
+  ExInitializeFastMutex(&FsChangeNotifyListLock);
 }

@@ -709,9 +709,8 @@
 {
   PFS_CHANGE_NOTIFY_ENTRY ChangeEntry;
   PLIST_ENTRY Entry;
-  KIRQL oldlvl;

-  KeAcquireSpinLock(&FsChangeNotifyListLock,&oldlvl);
+  ExAcquireFastMutex(&FsChangeNotifyListLock);
   Entry = FsChangeNotifyListHead.Flink;
   while (Entry != &FsChangeNotifyListHead)
     {
@@ -721,7 +720,7 @@

Entry = Entry->Flink;
     }
-  KeReleaseSpinLock(&FsChangeNotifyListLock,oldlvl);
+  ExReleaseFastMutex(&FsChangeNotifyListLock);
 }

@@ -743,9 +742,10 @@
   Entry->DriverObject = DriverObject;
   Entry->FSDNotificationProc = FSDNotificationProc;

-  ExInterlockedInsertHeadList(&FsChangeNotifyListHead,
-			      &Entry->FsChangeNotifyList,
-			      &FsChangeNotifyListLock);
+  ExAcquireFastMutex(&FsChangeNotifyListLock);
+  InsertHeadList(&FsChangeNotifyListHead,
+			      &Entry->FsChangeNotifyList);
+  ExReleaseFastMutex(&FsChangeNotifyListLock);

return(STATUS_SUCCESS);
 }
@@ -760,7 +760,6 @@
 {
   PFS_CHANGE_NOTIFY_ENTRY ChangeEntry;
   PLIST_ENTRY Entry;
-  KIRQL oldlvl;

Entry = FsChangeNotifyListHead.Flink;
   while (Entry != &FsChangeNotifyListHead)
@@ -769,9 +768,9 @@
       if (ChangeEntry->DriverObject == DriverObject &&
      ChangeEntry->FSDNotificationProc == FSDNotificationProc)
    {
-	  KeAcquireSpinLock(&FsChangeNotifyListLock,&oldlvl);
+	  ExAcquireFastMutex(&FsChangeNotifyListLock);
      RemoveEntryList(Entry);
-	  KeReleaseSpinLock(&FsChangeNotifyListLock,oldlvl);
+	  ExReleaseFastMutex(&FsChangeNotifyListLock);

ExFreePool(Entry);
      return;