diff -r 2bb754abd467 -r 0ffb4e86fcc9 kernel/eka/memmodel/epoc/flexible/mmu/mpagearray.cpp
--- a/kernel/eka/memmodel/epoc/flexible/mmu/mpagearray.cpp	Mon Jun 21 17:12:14 2010 +0300
+++ b/kernel/eka/memmodel/epoc/flexible/mmu/mpagearray.cpp	Thu Jul 15 20:11:42 2010 +0300
@@ -1158,6 +1158,7 @@
 		return NULL;
 
 	*p = (page & ~EStateMask) | EMoving;
+	s->Lock();
 
 	aPageList.Set(iSegments, aIndex, aIndex+1);