From 47670a47a3d7e0ec027043a572a638c70f4e7308 Mon Sep 17 00:00:00 2001
From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Date: Tue, 3 Jul 2012 14:31:43 +0800
Subject: [PATCH] --- yaml --- r: 311673 b: refs/heads/master c:
 85b7059169e128c57a3a8a3e588fb89cb2031da1 h: refs/heads/master i:   311671:
 a4828a6b13e3af4d5dbd37fa48662d12ba633846 v: v3

---
 [refs]                   | 2 +-
 trunk/arch/x86/kvm/mmu.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 4306d4a0e963..e6c3b03695d1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f411930442e01f9cf1bf4df41ff7e89476575c4d
+refs/heads/master: 85b7059169e128c57a3a8a3e588fb89cb2031da1
diff --git a/trunk/arch/x86/kvm/mmu.c b/trunk/arch/x86/kvm/mmu.c
index be3cea4407ff..57e168e27b5b 100644
--- a/trunk/arch/x86/kvm/mmu.c
+++ b/trunk/arch/x86/kvm/mmu.c
@@ -3934,6 +3934,9 @@ static void kvm_mmu_remove_some_alloc_mmu_pages(struct kvm *kvm,
 {
 	struct kvm_mmu_page *page;
 
+	if (list_empty(&kvm->arch.active_mmu_pages))
+		return;
+
 	page = container_of(kvm->arch.active_mmu_pages.prev,
 			    struct kvm_mmu_page, link);
 	kvm_mmu_prepare_zap_page(kvm, page, invalid_list);