diff --git a/[refs] b/[refs]
index f439d2dedbd5..99206d0ca81f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d85cf93da66977dbc645352be1b2084a659d8a0b
+refs/heads/master: 34b0900d323122113683685b200aae9f9b75e63b
diff --git a/trunk/arch/x86/kernel/paravirt.c b/trunk/arch/x86/kernel/paravirt.c
index dcba6c567a2a..c6520a4e85d4 100644
--- a/trunk/arch/x86/kernel/paravirt.c
+++ b/trunk/arch/x86/kernel/paravirt.c
@@ -273,6 +273,7 @@ void arch_flush_lazy_mmu_mode(void)
 	preempt_disable();
 
 	if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
+		WARN_ON(preempt_count() == 1);
 		arch_leave_lazy_mmu_mode();
 		arch_enter_lazy_mmu_mode();
 	}
@@ -285,6 +286,7 @@ void arch_flush_lazy_cpu_mode(void)
 	preempt_disable();
 
 	if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU) {
+		WARN_ON(preempt_count() == 1);
 		arch_leave_lazy_cpu_mode();
 		arch_enter_lazy_cpu_mode();
 	}