[tfaber] 74235: [NTOS:KE] - Make sure to disable interrupts each iteration of the idle loop, since IdleFunction can leave them enabled. CORE-12985 #resolve

Author: tfaber
Date: Mon Mar 27 20:16:59 2017
New Revision: 74235

URL: http://svn.reactos.org/svn/reactos?rev=74235&view=rev
Log:
[NTOS:KE]
- Make sure to disable interrupts each iteration of the idle loop, since IdleFunction can
leave them enabled.
CORE-12985 #resolve

Modified:
    trunk/reactos/ntoskrnl/ke/i386/thrdini.c

Modified: trunk/reactos/ntoskrnl/ke/i386/thrdini.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/i386/thrdini.c…
==============================================================================
--- trunk/reactos/ntoskrnl/ke/i386/thrdini.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/i386/thrdini.c	[iso-8859-1] Mon Mar 27 20:16:59 2017
@@ -270,15 +270,15 @@
     PKPRCB Prcb = KeGetCurrentPrcb();
     PKTHREAD OldThread, NewThread;
 
-    /* Initialize the idle loop: disable interrupts */
-    _enable();
-    YieldProcessor();
-    YieldProcessor();
-    _disable();
-
     /* Now loop forever */
     while (TRUE)
     {
+        /* Start of the idle loop: disable interrupts */
+        _enable();
+        YieldProcessor();
+        YieldProcessor();
+        _disable();
+
         /* Check for pending timers, pending DPCs, or pending ready threads */
         if ((Prcb->DpcData[0].DpcQueueDepth) ||
             (Prcb->TimerRequest) ||
@@ -310,12 +310,6 @@
 
             /* Switch away from the idle thread */
             KiSwapContext(APC_LEVEL, OldThread);
-
-            /* We are back in the idle thread -- disable interrupts again */
-            _enable();
-            YieldProcessor();
-            YieldProcessor();
-            _disable();
         }
         else
         {