linux-kernel - [PATCH v5 04/24] time: Introduce do_sys

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Message-Id: <e52f24edbeabdaa87ae8d999c0a367eca920d32b.1434079262.git.baolin.wang@linaro.org>
Date:	Fri, 12 Jun 2015 15:44:47 +0800
From:	Baolin Wang <baolin.wang@...aro.org>
To:	tglx@...utronix.de
Cc:	arnd@...db.de, john.stultz@...aro.org, pang.xunlei@...aro.org,
	mingo@...nel.org, peterz@...radead.org,
	linux-kernel@...r.kernel.org, baolin.wang@...aro.org,
	y2038@...ts.linaro.org
Subject: [PATCH v5 04/24] time: Introduce do_sys_settimeofday64()

Due to the do_sys_settimeofday() with timespec type is not year 2038
safe on 32bit systems, and it should introduce the do_sys_settimeofday64()
function with timespec64 type to make it is ready for 2038 issue.

For removing the old do_sys_settimeofday() function with timespec type
conveniently in future, it should move the do_sys_settimeofday() function
to the timekeeping.h file as a 'static inline' helper that just calls
do_sys_settimeofday64().

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 include/linux/timekeeping.h |   11 +++++++++--
 kernel/time/time.c          |    8 ++++----
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index f886bdb..2dcc86b 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -11,8 +11,15 @@ 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 = 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 972e3bb..5aefe2d 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -160,15 +160,15 @@ 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;
 
-	if (tv && !timespec_valid(tv))
+	if (tv && !timespec64_valid(tv))
 		return -EINVAL;
 
-	error = security_settime(tv, tz);
+	error = security_settime64(tv, tz);
 	if (error)
 		return error;
 
@@ -186,7 +186,7 @@ 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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