diff --git a/[refs] b/[refs]
index 46e2fd75c67e..f0fc06938049 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6a7b95481d49f73991d3dbf8c1e696a24684ac05
+refs/heads/master: 9d09daf8e891e6ed60f96fbaf765ba7bced8bad1
diff --git a/trunk/drivers/serial/atmel_serial.c b/trunk/drivers/serial/atmel_serial.c
index 3551c5cb7094..9d948bccafaf 100644
--- a/trunk/drivers/serial/atmel_serial.c
+++ b/trunk/drivers/serial/atmel_serial.c
@@ -1531,7 +1531,7 @@ static int __devinit atmel_serial_probe(struct platform_device *pdev)
 	void *data;
 	int ret;
 
-	BUILD_BUG_ON(!is_power_of_2(ATMEL_SERIAL_RINGSIZE));
+	BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1));
 
 	port = &atmel_ports[pdev->id];
 	port->backup_imr = 0;