1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 3551c5cb7094..9d948bccafaf 100644
--- a/drivers/serial/atmel_serial.c
+++ b/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;