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Revert "time: Handle negative seconds correctly in timespec64_to_ns()"
This reverts commit656f343d72
which is commit39ff83f2f6
upstream. Arnd reports that this needs more review before being merged into all of the trees. Link: https://lore.kernel.org/r/CAK8P3a0z5jE=Z3Ps5bFTCFT7CHZR1JQ8VhdntDJAfsUxSPCcEw@mail.gmail.com Reported-by: Arnd Bergmann <arnd@kernel.org> Cc: Lukas Hannen <lukas.hannen@opensource.tttech-industrial.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 2 additions and 7 deletions
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@ -25,9 +25,7 @@ struct itimerspec64 {
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#define TIME64_MIN (-TIME64_MAX - 1)
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#define KTIME_MAX ((s64)~((u64)1 << 63))
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#define KTIME_MIN (-KTIME_MAX - 1)
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#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
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#define KTIME_SEC_MIN (KTIME_MIN / NSEC_PER_SEC)
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/*
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* Limits for settimeofday():
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@ -126,13 +124,10 @@ static inline bool timespec64_valid_settod(const struct timespec64 *ts)
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*/
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static inline s64 timespec64_to_ns(const struct timespec64 *ts)
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{
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/* Prevent multiplication overflow / underflow */
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if (ts->tv_sec >= KTIME_SEC_MAX)
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/* Prevent multiplication overflow */
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if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
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return KTIME_MAX;
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if (ts->tv_sec <= KTIME_SEC_MIN)
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return KTIME_MIN;
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return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
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}
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