diff --git a/[refs] b/[refs]
index 0ed8965e5d95..9de14bd53bfe 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d64495366ff78fdbd5bd3176a7ada2f0c2cbfba6
+refs/heads/master: d0312b2142ac7665031755c1cc3dba827d4eb711
diff --git a/trunk/arch/x86/kernel/amd_iommu_init.c b/trunk/arch/x86/kernel/amd_iommu_init.c
index 0f5a9115a694..0124995c7b5d 100644
--- a/trunk/arch/x86/kernel/amd_iommu_init.c
+++ b/trunk/arch/x86/kernel/amd_iommu_init.c
@@ -394,17 +394,15 @@ static int __init find_last_devid_acpi(struct acpi_table_header *table)
  */
 static u8 * __init alloc_command_buffer(struct amd_iommu *iommu)
 {
-	u8 *cmd_buf = (u8 *)__get_free_pages(GFP_KERNEL,
+	u8 *cmd_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
 			get_order(CMD_BUFFER_SIZE));
-	u64 entry = 0;
+	u64 entry;
 
 	if (cmd_buf == NULL)
 		return NULL;
 
 	iommu->cmd_buf_size = CMD_BUFFER_SIZE;
 
-	memset(cmd_buf, 0, CMD_BUFFER_SIZE);
-
 	entry = (u64)virt_to_phys(cmd_buf);
 	entry |= MMIO_CMD_SIZE_512;
 	memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,