[U-Boot] [PATCH v1 02/11] include: time.h: define time64_t

[AKASHI Takahiro]

Adding time64_t definition will help improve portability of linux kernel
code (in my case, lib/crypto/x509_cert_parser.c).

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
---
 include/linux/time.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/linux/time.h b/include/linux/time.h
index b8d298eb4d68..6186985856d7 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -150,4 +150,28 @@ _DEFUN (ctime_r, (tim_p, result),
     return asctime_r (localtime_r (tim_p, &tm), result);
 }
 
+/* from <linux>/kernel/time/time.c */
+typedef __s64 time64_t;
+
+inline time64_t mktime64(const unsigned int year0, const unsigned int mon0,
+			 const unsigned int day, const unsigned int hour,
+			 const unsigned int min, const unsigned int sec)
+{
+	unsigned int mon = mon0, year = year0;
+
+	/* 1..12 -> 11,12,1..10 */
+	mon -= 2;
+	if (0 >= (int)mon) {
+		mon += 12;	/* Puts Feb last since it has leap day */
+		year -= 1;
+	}
+
+	return ((((time64_t)
+		  (year / 4 - year / 100 + year / 400 + 367 * mon / 12 + day) +
+		  year * 365 - 719499
+	  ) * 24 + hour /* now have hours - midnight tomorrow handled here */
+	  ) * 60 + min /* now have minutes */
+	) * 60 + sec; /* finally seconds */
+}
+
 #endif
-- 
2.21.0