[tip: timers/core] time/kunit: Use is_leap_year() helper

["tip-bot2 for Jinjie Ruan" <tip-bot2@linutronix.de>]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     3d431a106947a4a18ff5d3ba270a25df6a136e2f
Gitweb:        https://git.kernel.org/tip/3d431a106947a4a18ff5d3ba270a25df6a136e2f
Author:        Jinjie Ruan <ruanjinjie@huawei.com>
AuthorDate:    Fri, 23 Jan 2026 16:09:40 +08:00
Committer:     Thomas Gleixner <tglx@kernel.org>
CommitterDate: Mon, 26 Jan 2026 16:05:09 +01:00

time/kunit: Use is_leap_year() helper

Use the is_leap_year() helper from rtc.h instead of open coding it.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260123080940.335474-1-ruanjinjie@huawei.com
---
 kernel/time/time_test.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/kernel/time/time_test.c b/kernel/time/time_test.c
index 2889763..7c2fb5f 100644
--- a/kernel/time/time_test.c
+++ b/kernel/time/time_test.c
@@ -2,14 +2,7 @@
 
 #include <kunit/test.h>
 #include <linux/time.h>
-
-/*
- * Traditional implementation of leap year evaluation.
- */
-static bool is_leap(long year)
-{
-	return year % 4 == 0 && (year % 100 != 0 || year % 400 == 0);
-}
+#include <linux/rtc.h>
 
 /*
  * Gets the last day of a month.
@@ -17,7 +10,7 @@ static bool is_leap(long year)
 static int last_day_of_month(long year, int month)
 {
 	if (month == 2)
-		return 28 + is_leap(year);
+		return 28 + is_leap_year(year);
 	if (month == 4 || month == 6 || month == 9 || month == 11)
 		return 30;
 	return 31;