linux-kernel - [PATCH 5/8] rtc: Update rtc-dev to use y2038-safe time interfaces

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Date:	Fri, 23 Jan 2015 17:43:57 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Xunlei Pang <pang.xunlei@...aro.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH 5/8] rtc: Update rtc-dev to use y2038-safe time interfaces

From: Xunlei Pang <pang.xunlei@...aro.org>

Currently, rtc-dev.c uses y2038 problematic rtc_tm_to_time()
and rtc_time_to_tm(). So replace them with their corresponding
y2038-safe versions: rtc_tm_to_time64() and rtc_time64_to_tm().

Cc: pang.xunlei <pang.xunlei@...aro.org>
Cc: Arnd Bergmann <arnd.bergmann@...aro.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Xunlei Pang <pang.xunlei@...aro.org>
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
 drivers/rtc/rtc-dev.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index d049393..799c34b 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -304,12 +304,12 @@ static long rtc_dev_ioctl(struct file *file,
 		 * Not supported here.
 		 */
 		{
-			unsigned long now, then;
+			time64_t now, then;
 
 			err = rtc_read_time(rtc, &tm);
 			if (err < 0)
 				return err;
-			rtc_tm_to_time(&tm, &now);
+			now = rtc_tm_to_time64(&tm);
 
 			alarm.time.tm_mday = tm.tm_mday;
 			alarm.time.tm_mon = tm.tm_mon;
@@ -317,11 +317,11 @@ static long rtc_dev_ioctl(struct file *file,
 			err  = rtc_valid_tm(&alarm.time);
 			if (err < 0)
 				return err;
-			rtc_tm_to_time(&alarm.time, &then);
+			then = rtc_tm_to_time64(&alarm.time);
 
 			/* alarm may need to wrap into tomorrow */
 			if (then < now) {
-				rtc_time_to_tm(now + 24 * 60 * 60, &tm);
+				rtc_time64_to_tm(now + 24 * 60 * 60, &tm);
 				alarm.time.tm_mday = tm.tm_mday;
 				alarm.time.tm_mon = tm.tm_mon;
 				alarm.time.tm_year = tm.tm_year;
-- 
1.9.1

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