atmel_serial: fix bad BUILD_BUG_ON() usage

is_power_of_2() appears not to be constant enough for BUILD_BUG_ON()
after the latest rework, so replace it with an open-coded test.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 3551c5cb70940cb9c4733ce645ce81ba1d9f2e3f..9d948bccafafa50bd13534ff330b6535cde29996 100644 (file)
--- 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;