Save the old irql in ExTryToAcquireFastMutex.
Modified: trunk/reactos/hal/halx86/generic/fmutex.c
Modified: trunk/reactos/ntoskrnl/ex/fmutex.c

Modified: trunk/reactos/hal/halx86/generic/fmutex.c
--- trunk/reactos/hal/halx86/generic/fmutex.c	2005-11-26 16:04:33 UTC (rev 19639)
+++ trunk/reactos/hal/halx86/generic/fmutex.c	2005-11-26 16:08:27 UTC (rev 19640)
@@ -84,6 +84,7 @@
     {
         /* We have, set us as owners */
         FastMutex->Owner = KeGetCurrentThread();
+        FastMutex->OldIrql = OldIrql;
         return TRUE;
     }
     else

Modified: trunk/reactos/ntoskrnl/ex/fmutex.c
--- trunk/reactos/ntoskrnl/ex/fmutex.c	2005-11-26 16:04:33 UTC (rev 19639)
+++ trunk/reactos/ntoskrnl/ex/fmutex.c	2005-11-26 16:08:27 UTC (rev 19640)
@@ -191,6 +191,7 @@
     {
         /* We have, set us as owners */
         FastMutex->Owner = KeGetCurrentThread();
+        FastMutex->OldIrql = OldIrql;
         return TRUE;
     }
     else