diff --git a/[refs] b/[refs]
index da0ceaba80a9..5941d5f9e3f7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 92ac4320af6ed4294c2c221dd4ccbfd9026a3aa7
+refs/heads/master: bfd1be1857e5a3385bf146e02e6dc3dd4241bec1
diff --git a/trunk/arch/x86/include/asm/amd_iommu.h b/trunk/arch/x86/include/asm/amd_iommu.h
index f712344329bc..1750e1f85d3c 100644
--- a/trunk/arch/x86/include/asm/amd_iommu.h
+++ b/trunk/arch/x86/include/asm/amd_iommu.h
@@ -27,6 +27,7 @@ extern int amd_iommu_init(void);
 extern int amd_iommu_init_dma_ops(void);
 extern void amd_iommu_detect(void);
 extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
+extern void amd_iommu_flush_all_domains(void);
 #else
 static inline int amd_iommu_init(void) { return -ENODEV; }
 static inline void amd_iommu_detect(void) { }
diff --git a/trunk/arch/x86/kernel/amd_iommu.c b/trunk/arch/x86/kernel/amd_iommu.c
index d9e9dc141a1e..826ad079efc4 100644
--- a/trunk/arch/x86/kernel/amd_iommu.c
+++ b/trunk/arch/x86/kernel/amd_iommu.c
@@ -449,6 +449,17 @@ static void iommu_flush_domain(u16 domid)
 	}
 }
 
+void amd_iommu_flush_all_domains(void)
+{
+	int i;
+
+	for (i = 1; i < MAX_DOMAIN_ID; ++i) {
+		if (!test_bit(i, amd_iommu_pd_alloc_bitmap))
+			continue;
+		iommu_flush_domain(i);
+	}
+}
+
 /****************************************************************************
  *
  * The functions below are used the create the page table mappings for