--- /dev/null
+From 8a904a3caa88118744062e872ae90f37748a8fd8 Mon Sep 17 00:00:00 2001
+From: David Gow <davidgow@google.com>
+Date: Wed, 21 Feb 2024 17:27:18 +0800
+Subject: rtc: test: Fix invalid format specifier.
+
+From: David Gow <davidgow@google.com>
+
+commit 8a904a3caa88118744062e872ae90f37748a8fd8 upstream.
+
+'days' is a s64 (from div_s64), and so should use a %lld specifier.
+
+This was found by extending KUnit's assertion macros to use gcc's
+__printf attribute.
+
+Fixes: 1d1bb12a8b18 ("rtc: Improve performance of rtc_time64_to_tm(). Add tests.")
+Signed-off-by: David Gow <davidgow@google.com>
+Tested-by: Guenter Roeck <linux@roeck-us.net>
+Reviewed-by: Justin Stitt <justinstitt@google.com>
+Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
+Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/rtc/lib_test.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/rtc/lib_test.c
++++ b/drivers/rtc/lib_test.c
+@@ -54,7 +54,7 @@ static void rtc_time64_to_tm_test_date_r
+
+ days = div_s64(secs, 86400);
+
+- #define FAIL_MSG "%d/%02d/%02d (%2d) : %ld", \
++ #define FAIL_MSG "%d/%02d/%02d (%2d) : %lld", \
+ year, month, mday, yday, days
+
+ KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);