diff --git a/[refs] b/[refs]
index 824a37a40e49..4c1ef5c211e2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8c8c143cdc95ebe50fd962917556e25e8912997b
+refs/heads/master: bad1cac28a707c69301a4d0612da9ccbecd51953
diff --git a/trunk/arch/x86/kernel/amd_iommu.c b/trunk/arch/x86/kernel/amd_iommu.c
index ebc1c8443926..6ffb3e637657 100644
--- a/trunk/arch/x86/kernel/amd_iommu.c
+++ b/trunk/arch/x86/kernel/amd_iommu.c
@@ -530,8 +530,7 @@ static int iommu_map_page(struct protection_domain *dom,
 	bus_addr  = PAGE_ALIGN(bus_addr);
 	phys_addr = PAGE_ALIGN(phys_addr);
 
-	/* only support 512GB address spaces for now */
-	if (bus_addr > IOMMU_MAP_SIZE_L3 || !(prot & IOMMU_PROT_MASK))
+	if (!(prot & IOMMU_PROT_MASK))
 		return -EINVAL;
 
 	pte = alloc_pte(dom, bus_addr, NULL, GFP_KERNEL);