rtc: Update rtc-dev to use y2038-safe time interfaces

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@linaro.org>
Cc: Arnd Bergmann <arnd.bergmann@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index d049393692517bfea7229f6f0c673de3d5f57847..799c34bcb26f3b54cfc45100775990918727bb53 100644 (file)
--- 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;