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authorXunlei Pang <pang.xunlei@linaro.org>2015-04-01 20:34:23 -0700
committerIngo Molnar <mingo@kernel.org>2015-04-03 08:18:20 +0200
commit3c00a1fe8496ff29ab62764bb3f4ce4b48089004 (patch)
tree1d0ebcd277eb8e7bede0f7e4d8ef26a04285e30b /kernel/time/ntp.c
parent2ee966320028ac846654eba5344540eeb4dc228d (diff)
downloadop-kernel-dev-3c00a1fe8496ff29ab62764bb3f4ce4b48089004.zip
op-kernel-dev-3c00a1fe8496ff29ab62764bb3f4ce4b48089004.tar.gz
time: Add y2038 safe update_persistent_clock64()
As part of addressing in-kernel y2038 issues, this patch adds update_persistent_clock64() and replaces all the call sites of update_persistent_clock() with this function. This is a __weak implementation, which simply calls the existing y2038 unsafe update_persistent_clock(). This allows architecture specific implementations to be converted independently, and eventually y2038-unsafe update_persistent_clock() can be removed after all its architecture specific implementations have been converted to update_persistent_clock64(). Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org> Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1427945681-29972-4-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/ntp.c')
-rw-r--r--kernel/time/ntp.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 9ad60d0..7a68100 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -458,6 +458,16 @@ out:
return leap;
}
+#ifdef CONFIG_GENERIC_CMOS_UPDATE
+int __weak update_persistent_clock64(struct timespec64 now64)
+{
+ struct timespec now;
+
+ now = timespec64_to_timespec(now64);
+ return update_persistent_clock(now);
+}
+#endif
+
#if defined(CONFIG_GENERIC_CMOS_UPDATE) || defined(CONFIG_RTC_SYSTOHC)
static void sync_cmos_clock(struct work_struct *work);
@@ -493,8 +503,9 @@ static void sync_cmos_clock(struct work_struct *work)
if (persistent_clock_is_local)
adjust.tv_sec -= (sys_tz.tz_minuteswest * 60);
#ifdef CONFIG_GENERIC_CMOS_UPDATE
- fail = update_persistent_clock(timespec64_to_timespec(adjust));
+ fail = update_persistent_clock64(adjust);
#endif
+
#ifdef CONFIG_RTC_SYSTOHC
if (fail == -ENODEV)
fail = rtc_set_ntp_time(adjust);
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