linux-kernel - [PATCH v3 14/22] time:Introduce the do_sys_settimeofday64() function with timespec64 type

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Message-Id: <1431343162-29918-1-git-send-email-baolin.wang@linaro.org>
Date:	Mon, 11 May 2015 19:19:22 +0800
From:	Baolin Wang <baolin.wang@...aro.org>
To:	tglx@...utronix.de
Cc:	arnd@...db.de, john.stultz@...aro.org, heenasirwani@...il.com,
	pang.xunlei@...aro.org, linux-kernel@...r.kernel.org,
	baolin.wang@...aro.org, y2038@...ts.linaro.org
Subject: [PATCH v3 14/22] time:Introduce the do_sys_settimeofday64() function with timespec64 type

This patch introduces the do_sys_settimeofday64() function with timespec64
type, that makes this function ready for 2038 issue when setting the time of day.
And moves the do_sys_settimeofday() function to the timekeeping.h file.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 include/linux/timekeeping.h |   12 ++++++++++--
 kernel/time/time.c          |   10 ++++++----
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index c6d5ae9..89beb62 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -11,8 +11,16 @@ extern int timekeeping_suspended;
  */
 extern void do_gettimeofday(struct timeval *tv);
 extern int do_settimeofday64(const struct timespec64 *ts);
-extern int do_sys_settimeofday(const struct timespec *tv,
-			       const struct timezone *tz);
+extern int do_sys_settimeofday64(const struct timespec64 *tv,
+				 const struct timezone *tz);
+static inline int do_sys_settimeofday(const struct timespec *tv,
+				      const struct timezone *tz)
+{
+	struct timespec64 ts64;
+
+	ts64 = timespec_to_timespec64(*tv);
+	return do_sys_settimeofday64(&ts64, tz);
+}
 
 /*
  * Kernel time accessors
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 2c85b77..f43011b 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -160,15 +160,17 @@ static inline void warp_clock(void)
  * various programs will get confused when the clock gets warped.
  */
 
-int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
+int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz)
 {
 	static int firsttime = 1;
 	int error = 0;
+	struct timespec ts;
 
-	if (tv && !timespec_valid(tv))
+	if (tv && !timespec64_valid(tv))
 		return -EINVAL;
 
-	error = security_settime(tv, tz);
+	ts = timespec64_to_timespec(*tv);
+	error = security_settime(&ts, tz);
 	if (error)
 		return error;
 
@@ -182,7 +184,7 @@ int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
 		}
 	}
 	if (tv)
-		return do_settimeofday(tv);
+		return do_settimeofday64(tv);
 	return 0;
 }
 
-- 
1.7.9.5

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