diff --git a/[refs] b/[refs]
index 5f20cc22db9e..f69cf4ef4ce5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 376ae4752e3a387d41a2ba9c9ea45c2df625e6e4
+refs/heads/master: e05ef9bdb899e2f3798be74691842fc597d8ce60
diff --git a/trunk/arch/s390/mm/pgtable.c b/trunk/arch/s390/mm/pgtable.c
index 19338d228c9b..0c719c61972e 100644
--- a/trunk/arch/s390/mm/pgtable.c
+++ b/trunk/arch/s390/mm/pgtable.c
@@ -449,6 +449,8 @@ int s390_enable_sie(void)
 	tsk->mm = tsk->active_mm = mm;
 	preempt_disable();
 	update_mm(mm, tsk);
+	atomic_inc(&mm->context.attach_count);
+	atomic_dec(&old_mm->context.attach_count);
 	cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
 	preempt_enable();
 	task_unlock(tsk);