[PATCH v2 20/22] rtc: sysfs: stop using rtc deprecated functions

From: Benjamin Gaignard
Date: Wed Jul 12 2017 - 04:05:59 EST


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@xxxxxxxxxx>
CC: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
CC: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
CC: rtc-linux@xxxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
---
drivers/rtc/rtc-sysfs.c | 25 +++++++++++++------------
1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index e364550..8b97def 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -72,9 +72,10 @@

retval = rtc_read_time(to_rtc_device(dev), &tm);
if (retval == 0) {
- unsigned long time;
- rtc_tm_to_time(&tm, &time);
- retval = sprintf(buf, "%lu\n", time);
+ unsigned long long time;
+
+ time = rtc_tm_to_time64(&tm);
+ retval = sprintf(buf, "%llu\n", time);
}

return retval;
@@ -132,7 +133,7 @@
wakealarm_show(struct device *dev, struct device_attribute *attr, char *buf)
{
ssize_t retval;
- unsigned long alarm;
+ unsigned long long alarm;
struct rtc_wkalrm alm;

/* Don't show disabled alarms. For uniformity, RTC alarms are
@@ -145,8 +146,8 @@
*/
retval = rtc_read_alarm(to_rtc_device(dev), &alm);
if (retval == 0 && alm.enabled) {
- rtc_tm_to_time(&alm.time, &alarm);
- retval = sprintf(buf, "%lu\n", alarm);
+ alarm = rtc_tm_to_time64(&alm.time);
+ retval = sprintf(buf, "%llu\n", alarm);
}

return retval;
@@ -157,8 +158,8 @@
const char *buf, size_t n)
{
ssize_t retval;
- unsigned long now, alarm;
- unsigned long push = 0;
+ unsigned long long now, alarm;
+ unsigned long long push = 0;
struct rtc_wkalrm alm;
struct rtc_device *rtc = to_rtc_device(dev);
const char *buf_ptr;
@@ -170,7 +171,7 @@
retval = rtc_read_time(rtc, &alm.time);
if (retval < 0)
return retval;
- rtc_tm_to_time(&alm.time, &now);
+ now = rtc_tm_to_time64(&alm.time);

buf_ptr = buf;
if (*buf_ptr == '+') {
@@ -181,7 +182,7 @@
} else
adjust = 1;
}
- retval = kstrtoul(buf_ptr, 0, &alarm);
+ retval = kstrtoull(buf_ptr, 0, &alarm);
if (retval)
return retval;
if (adjust) {
@@ -197,7 +198,7 @@
return retval;
if (alm.enabled) {
if (push) {
- rtc_tm_to_time(&alm.time, &push);
+ push = rtc_tm_to_time64(&alm.time);
alarm += push;
} else
return -EBUSY;
@@ -212,7 +213,7 @@
*/
alarm = now + 300;
}
- rtc_time_to_tm(alarm, &alm.time);
+ rtc_time64_to_tm(alarm, &alm.time);

retval = rtc_set_alarm(rtc, &alm);
return (retval < 0) ? retval : n;
--
1.9.1