---
 drivers/acpi/atomicio.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

--- a/drivers/acpi/atomicio.c
+++ b/drivers/acpi/atomicio.c
@@ -306,11 +306,18 @@ static int acpi_atomic_read_mem(u64 padd
 	case 32:
 		*val = readl(addr);
 		break;
-#ifdef readq
 	case 64:
+#ifdef readq
 		*val = readq(addr);
-		break;
+#else
+		{
+			u64 h;
+			*val = readl(addr);
+			h = readl(addr+4);
+			*val = *val + (h << 32);
+		}
 #endif
+		break;
 	default:
 		return -EINVAL;
 	}