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authorRobert P. J. Day <rpjday@crashcourse.ca>2008-02-06 01:38:42 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:13 -0800
commit9974b6ea7b85a32f34f824443f47aa501c85ee8f (patch)
tree9ba16c56565ea083b663547f4c1c54c3feb87682 /drivers/rtc
parent037e291cc77a4beb0379a8c74e3d82e49a476b84 (diff)
rtc-s3c: Use is_power_of_2() macro for simplicity.
Use is_power_of_2() macro for simplicity. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
-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 e2041b4d0c85..86766f1f2496 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;
}