[07/51] rtc: ab8500: stop using rtc deprecated functions

Message ID 1497951359-13334-8-git-send-email-benjamin.gaignard@linaro.org
State New
Headers show
Series
  • rtc: stop using rtc deprecated functions
Related show

Commit Message

Benjamin Gaignard June 20, 2017, 9:35 a.m.
rtc_time_to_tm() and rtc_tm_to_time() are deprecated because they
rely on 32bits variables and that will make rtc break in y2038/2016.
Stop using those two functions to safer 64bits ones.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

CC: Linus Walleij <linus.walleij@linaro.org>
CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Alexandre Belloni <alexandre.belloni@free-electrons.com>
CC: rtc-linux@googlegroups.com
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
---
 drivers/rtc/rtc-ab8500.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

-- 
1.9.1

Comments

Linus Walleij June 20, 2017, 4:06 p.m. | #1
On Tue, Jun 20, 2017 at 11:35 AM, Benjamin Gaignard
<benjamin.gaignard@linaro.org> wrote:

> rtc_time_to_tm() and rtc_tm_to_time() are deprecated because they

> rely on 32bits variables and that will make rtc break in y2038/2016.

> Stop using those two functions to safer 64bits ones.

>

> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>

> CC: Linus Walleij <linus.walleij@linaro.org>

> CC: Alessandro Zummo <a.zummo@towertech.it>

> CC: Alexandre Belloni <alexandre.belloni@free-electrons.com>

> CC: rtc-linux@googlegroups.com

> CC: linux-kernel@vger.kernel.org

> CC: linux-arm-kernel@lists.infradead.org


Looks fine.
Acked-by: Linus Walleij <linus.walleij@linaro.org>


Yours,
Linus Walleij
kbuild test robot June 21, 2017, 6:57 a.m. | #2
Hi Benjamin,

[auto build test ERROR on abelloni/rtc-next]
[also build test ERROR on v4.12-rc6 next-20170620]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Benjamin-Gaignard/rtc-stop-using-rtc-deprecated-functions/20170621-044455
base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
config: arm-u8500_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   drivers/built-in.o: In function `ab8540_rtc_set_alarm':
>> drivers/rtc/rtc-ab8500.c:299: undefined reference to `__aeabi_uldivmod'

   drivers/rtc/rtc-ab8500.c:301: undefined reference to `__aeabi_uldivmod'
   drivers/built-in.o: In function `ab8500_rtc_set_time':
   drivers/rtc/rtc-ab8500.c:158: undefined reference to `__aeabi_uldivmod'
   drivers/rtc/rtc-ab8500.c:160: undefined reference to `__aeabi_uldivmod'
   drivers/built-in.o: In function `ab8500_rtc_set_alarm':
   drivers/rtc/rtc-ab8500.c:263: undefined reference to `__aeabi_uldivmod'

vim +299 drivers/rtc/rtc-ab8500.c

45a9f91a Benjamin Gaignard 2017-06-20  293  	secs = rtc_tm_to_time64(&alarm->time);
25d053cf Alexandre Torgue  2013-07-03  294  
25d053cf Alexandre Torgue  2013-07-03  295  	/*
25d053cf Alexandre Torgue  2013-07-03  296  	 * Convert it to the number of seconds since 01-01-2000 00:00:00
25d053cf Alexandre Torgue  2013-07-03  297  	 */
25d053cf Alexandre Torgue  2013-07-03  298  	secs -= get_elapsed_seconds(AB8500_RTC_EPOCH);
25d053cf Alexandre Torgue  2013-07-03 @299  	mins = secs / 60;
25d053cf Alexandre Torgue  2013-07-03  300  
25d053cf Alexandre Torgue  2013-07-03  301  	buf[3] = secs % 60;
25d053cf Alexandre Torgue  2013-07-03  302  	buf[2] = mins & 0xFF;

:::::: The code at line 299 was first introduced by commit
:::::: 25d053cf1040e6430fff679854b3710edb0b7fee drivers/rtc/rtc-ab8500.c: add second resolution to rtc driver

:::::: TO: Alexandre Torgue <alexandre.torgue@st.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Patch

diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 24a0af6..ac131bd 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -71,7 +71,7 @@ 
 /* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */
 static unsigned long get_elapsed_seconds(int year)
 {
-	unsigned long secs;
+	unsigned long long secs;
 	struct rtc_time tm = {
 		.tm_year = year - 1900,
 		.tm_mday = 1,
@@ -81,7 +81,7 @@  static unsigned long get_elapsed_seconds(int year)
 	 * This function calculates secs from 1970 and not from
 	 * 1900, even if we supply the offset from year 1900.
 	 */
-	rtc_tm_to_time(&tm, &secs);
+	secs = rtc_tm_to_time64(&tm);
 	return secs;
 }
 
@@ -89,7 +89,7 @@  static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
 	unsigned long timeout = jiffies + HZ;
 	int retval, i;
-	unsigned long mins, secs;
+	unsigned long long mins, secs;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
 	u8 value;
 
@@ -130,7 +130,7 @@  static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
 	/* Add back the initially subtracted number of seconds */
 	secs += get_elapsed_seconds(AB8500_RTC_EPOCH);
 
-	rtc_time_to_tm(secs, tm);
+	rtc_time64_to_tm(secs, tm);
 	return rtc_valid_tm(tm);
 }
 
@@ -138,7 +138,7 @@  static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
 	int retval, i;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
-	unsigned long no_secs, no_mins, secs = 0;
+	unsigned long long no_secs, no_mins, secs = 0;
 
 	if (tm->tm_year < (AB8500_RTC_EPOCH - 1900)) {
 		dev_dbg(dev, "year should be equal to or greater than %d\n",
@@ -147,7 +147,7 @@  static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	}
 
 	/* Get the number of seconds since 1970 */
-	rtc_tm_to_time(tm, &secs);
+	secs = rtc_tm_to_time64(tm);
 
 	/*
 	 * Convert it to the number of seconds since 01-01-2000 00:00:00, since
@@ -185,7 +185,7 @@  static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	int retval, i;
 	u8 rtc_ctrl, value;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
-	unsigned long secs, mins;
+	unsigned long long secs, mins;
 
 	/* Check if the alarm is enabled or not */
 	retval = abx500_get_register_interruptible(dev, AB8500_RTC,
@@ -214,7 +214,7 @@  static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	/* Add back the initially subtracted number of seconds */
 	secs += get_elapsed_seconds(AB8500_RTC_EPOCH);
 
-	rtc_time_to_tm(secs, &alarm->time);
+	rtc_time64_to_tm(secs, &alarm->time);
 
 	return rtc_valid_tm(&alarm->time);
 }
@@ -230,7 +230,7 @@  static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
 	int retval, i;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
-	unsigned long mins, secs = 0, cursec = 0;
+	unsigned long long mins, secs = 0, cursec = 0;
 	struct rtc_time curtm;
 
 	if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) {
@@ -240,7 +240,7 @@  static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	}
 
 	/* Get the number of seconds since 1970 */
-	rtc_tm_to_time(&alarm->time, &secs);
+	secs = rtc_tm_to_time64(&alarm->time);
 
 	/*
 	 * Check whether alarm is set less than 1min.
@@ -248,7 +248,7 @@  static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	 * return -EINVAL, so UIE EMUL can take it up, incase of UIE_ON
 	 */
 	ab8500_rtc_read_time(dev, &curtm); /* Read current time */
-	rtc_tm_to_time(&curtm, &cursec);
+	cursec = rtc_tm_to_time64(&curtm);
 	if ((secs - cursec) < 59) {
 		dev_dbg(dev, "Alarm less than 1 minute not supported\r\n");
 		return -EINVAL;
@@ -281,7 +281,7 @@  static int ab8540_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
 	int retval, i;
 	unsigned char buf[ARRAY_SIZE(ab8540_rtc_alarm_regs)];
-	unsigned long mins, secs = 0;
+	unsigned long long mins, secs = 0;
 
 	if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) {
 		dev_dbg(dev, "year should be equal to or greater than %d\n",
@@ -290,7 +290,7 @@  static int ab8540_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	}
 
 	/* Get the number of seconds since 1970 */
-	rtc_tm_to_time(&alarm->time, &secs);
+	secs = rtc_tm_to_time64(&alarm->time);
 
 	/*
 	 * Convert it to the number of seconds since 01-01-2000 00:00:00