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-rw-r--r--drivers/rtc/rtc-s3c.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index e2041b4d0c8..86766f1f249 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -20,6 +20,7 @@
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/clk.h>
+#include <linux/log2.h>
#include <asm/hardware.h>
#include <asm/uaccess.h>
@@ -309,9 +310,7 @@ static int s3c_rtc_ioctl(struct device *dev,
break;
case RTC_IRQP_SET:
- /* check for power of 2 */
-
- if ((arg & (arg-1)) != 0 || arg < 1) {
+ if (!is_power_of_2(arg)) {
ret = -EINVAL;
goto exit;
}