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| author | pang.xunlei <pang.xunlei@linaro.org> | 2014-11-18 14:15:16 +0300 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2014-11-21 22:59:57 +0300 |
| commit | 21f7eca555ad14e7c7b2cb59a6c6252e74ee5c8b (patch) | |
| tree | 1d3beb73efb551aa006118bcf753b1df187ce72c /include/linux/timekeeping.h | |
| parent | 659bc17b80c692e0ccda757e207fc4666d9b3e71 (diff) | |
| download | linux-21f7eca555ad14e7c7b2cb59a6c6252e74ee5c8b.tar.xz | |
time: Provide y2038 safe do_settimeofday() replacement
The kernel uses 32-bit signed value(time_t) for seconds elapsed
1970-01-01:00:00:00, thus it will overflow at 2038-01-19 03:14:08
on 32-bit systems. This is widely known as the y2038 problem.
As part of addressing "y2038 problem" for in-kernel uses, this patch
adds safe do_settimeofday64() using timespec64.
After this patch, do_settimeofday() is deprecated and all its call
sites will be fixed using do_settimeofday64(), after that it can be
removed.
Signed-off-by: pang.xunlei <pang.xunlei@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'include/linux/timekeeping.h')
| -rw-r--r-- | include/linux/timekeeping.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 1caa6b04fdc5..071ad7e0c981 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -10,7 +10,7 @@ extern int timekeeping_suspended; * Get and set timeofday */ extern void do_gettimeofday(struct timeval *tv); -extern int do_settimeofday(const struct timespec *tv); +extern int do_settimeofday64(const struct timespec64 *ts); extern int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz); @@ -33,6 +33,14 @@ extern int __getnstimeofday64(struct timespec64 *tv); extern void getnstimeofday64(struct timespec64 *tv); #if BITS_PER_LONG == 64 +/** + * Deprecated. Use do_settimeofday64(). + */ +static inline int do_settimeofday(const struct timespec *ts) +{ + return do_settimeofday64(ts); +} + static inline int __getnstimeofday(struct timespec *ts) { return __getnstimeofday64(ts); @@ -54,6 +62,17 @@ static inline void ktime_get_real_ts(struct timespec *ts) } #else +/** + * Deprecated. Use do_settimeofday64(). + */ +static inline int do_settimeofday(const struct timespec *ts) +{ + struct timespec64 ts64; + + ts64 = timespec_to_timespec64(*ts); + return do_settimeofday64(&ts64); +} + static inline int __getnstimeofday(struct timespec *ts) { struct timespec64 ts64; |