Messages in this thread Patch in this message |  | | From | Jonghwa Lee <> | Subject | [PATCH] rtc: Modify leap year test for more simpler way | Date | Wed, 06 Feb 2013 20:22:55 +0900 |
| |
Leap year which is multiple of 4, just needed 2 LSB for verifying. A year with zero for all thease two bits means that it is leap year.
Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> --- include/linux/rtc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/rtc.h b/include/linux/rtc.h index 9531845..d662b8d 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -181,7 +181,7 @@ void rtc_timer_do_work(struct work_struct *work); static inline bool is_leap_year(unsigned int year) { - return (!(year % 4) && (year % 100)) || !(year % 400); + return !(year & 0x3); } #ifdef CONFIG_RTC_HCTOSYS_DEVICE -- 1.7.9.5
|  |