Index: /trunk/src/VBox/Runtime/r0drv/linux/mpnotification-r0drv-linux.c
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/linux/mpnotification-r0drv-linux.c	(revision 54803)
+++ /trunk/src/VBox/Runtime/r0drv/linux/mpnotification-r0drv-linux.c	(revision 54804)
@@ -154,5 +154,7 @@
         case CPU_ONLINE_FROZEN:
 # endif
+            stac();
             rtMpNotificationDoCallbacks(RTMPEVENT_ONLINE, idCpu);
+            clac();
             break;
 
@@ -162,5 +164,7 @@
         case CPU_DOWN_PREPARE_FROZEN:
 #  endif
+            stac();
             rtMpNotificationDoCallbacks(RTMPEVENT_OFFLINE, idCpu);
+            clac();
             break;
 # endif