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| author |   DengChao <chao.deng@linaro.org> | 2015-12-13 12:24:19 +0800 |
|---|---|---|
| committer |   John Stultz <john.stultz@linaro.org> | 2015-12-16 16:50:55 -0800 |
| commit | 0af864651b459afb0435ee8786a19cbe5a044cdb (patch) | |
| tree | 9be604ee45f8f9ef891c5dd1783b2b6b2d2bb463 /kernel/time/ntp.c | |
| parent | timekeeping: Provide internal function __ktime_get_real_seconds (diff) | |
| download | linux-dev-0af864651b459afb0435ee8786a19cbe5a044cdb.tar.xz linux-dev-0af864651b459afb0435ee8786a19cbe5a044cdb.zip | |
ntp: Change time_reftime to time64_t and utilize 64bit __ktime_get_real_seconds
The type of static variant "time_reftime" and the call of
get_seconds in ntp are both not y2038 safe.
So change the type of time_reftime to time64_t and replace
get_seconds with __ktime_get_real_seconds.
The local variant "secs" in ntp_update_offset represents
seconds between now and last ntp adjustment, it seems impossible
that this time will last more than 68 years, so keep its type as
"long".
Reviewed-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: DengChao <chao.deng@linaro.org>
[jstultz: Tweaked commit message]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time/ntp.c')
| -rw-r--r-- | kernel/time/ntp.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index 4073c9550af9..e947bfddd2c2 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -18,6 +18,8 @@ #include <linux/rtc.h> #include "ntp_internal.h" +#include "timekeeping_internal.h" + /* * NTP timekeeping variables: @@ -70,7 +72,7 @@ static long time_esterror = NTP_PHASE_LIMIT; static s64 time_freq; /* time at last adjustment (secs): */ -static long time_reftime; +static time64_t time_reftime; static long time_adjust; @@ -313,11 +315,11 @@ static void ntp_update_offset(long offset) * Select how the frequency is to be controlled * and in which mode (PLL or FLL). */ - secs = get_seconds() - time_reftime; + secs = (long)(__ktime_get_real_seconds() - time_reftime); if (unlikely(time_status & STA_FREQHOLD)) secs = 0; - time_reftime = get_seconds(); + time_reftime = __ktime_get_real_seconds(); offset64 = offset; freq_adj = ntp_update_offset_fll(offset64, secs); @@ -592,7 +594,7 @@ static inline void process_adj_status(struct timex *txc, struct timespec64 *ts) * reference time to current time. */ if (!(time_status & STA_PLL) && (txc->status & STA_PLL)) - time_reftime = get_seconds(); + time_reftime = __ktime_get_real_seconds(); /* only set allowed bits */ time_status &= STA_RONLY; |