diff options
Diffstat (limited to 'kernel/time/time.c')
| -rw-r--r-- | kernel/time/time.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c index be115b020..667b9335f 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -160,15 +160,15 @@ static inline void warp_clock(void) * various programs will get confused when the clock gets warped. */ -int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz) +int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz) { static int firsttime = 1; int error = 0; - if (tv && !timespec_valid(tv)) + if (tv && !timespec64_valid(tv)) return -EINVAL; - error = security_settime(tv, tz); + error = security_settime64(tv, tz); if (error) return error; @@ -186,7 +186,7 @@ int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz) } } if (tv) - return do_settimeofday(tv); + return do_settimeofday64(tv); return 0; } @@ -769,3 +769,24 @@ struct timespec timespec_add_safe(const struct timespec lhs, return res; } + +/* + * Add two timespec64 values and do a safety check for overflow. + * It's assumed that both values are valid (>= 0). + * And, each timespec64 is in normalized form. + */ +struct timespec64 timespec64_add_safe(const struct timespec64 lhs, + const struct timespec64 rhs) +{ + struct timespec64 res; + + set_normalized_timespec64(&res, lhs.tv_sec + rhs.tv_sec, + lhs.tv_nsec + rhs.tv_nsec); + + if (unlikely(res.tv_sec < lhs.tv_sec || res.tv_sec < rhs.tv_sec)) { + res.tv_sec = TIME64_MAX; + res.tv_nsec = 0; + } + + return res; +} |