The conversion between struct timespec and jiffies is not year 2038 safe on 32bit systems. Introduce timespec64_to_jiffies() and jiffies_to_timespec64() functions which use struct timespec64 to make it ready for 2038 issue.
Signed-off-by: Baolin Wang baolin.wang@linaro.org --- include/linux/jiffies.h | 21 ++++++++++++++++++--- kernel/time/time.c | 11 ++++++----- 2 files changed, 24 insertions(+), 8 deletions(-)
diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h index 3bde5eb..be37eae 100644 --- a/include/linux/jiffies.h +++ b/include/linux/jiffies.h @@ -363,9 +363,24 @@ static inline unsigned long msecs_to_jiffies(const unsigned int m) }
extern unsigned long usecs_to_jiffies(const unsigned int u); -extern unsigned long timespec_to_jiffies(const struct timespec *value); -extern void jiffies_to_timespec(const unsigned long jiffies, - struct timespec *value); +extern unsigned long __timespec_to_jiffies(unsigned long sec, long nsec); +extern unsigned long timespec64_to_jiffies(const struct timespec64 *value); +extern void jiffies_to_timespec64(const unsigned long jiffies, + struct timespec64 *value); +static inline unsigned long timespec_to_jiffies(const struct timespec *value) +{ + return __timespec_to_jiffies(value->tv_sec, value->tv_nsec); +} + +static inline void jiffies_to_timespec(const unsigned long jiffies, + struct timespec *value) +{ + struct timespec64 ts; + + jiffies_to_timespec64(jiffies, &ts); + *value = timespec64_to_timespec(ts); +} + extern unsigned long timeval_to_jiffies(const struct timeval *value); extern void jiffies_to_timeval(const unsigned long jiffies, struct timeval *value); diff --git a/kernel/time/time.c b/kernel/time/time.c index 5aefe2d..8318cab 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -552,7 +552,7 @@ EXPORT_SYMBOL(usecs_to_jiffies); * The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec * value to a scaled second value. */ -static unsigned long +unsigned long __timespec_to_jiffies(unsigned long sec, long nsec) { nsec = nsec + TICK_NSEC - 1; @@ -566,17 +566,18 @@ __timespec_to_jiffies(unsigned long sec, long nsec) (NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC;
} +EXPORT_SYMBOL(__timespec_to_jiffies);
unsigned long -timespec_to_jiffies(const struct timespec *value) +timespec64_to_jiffies(const struct timespec64 *value) { return __timespec_to_jiffies(value->tv_sec, value->tv_nsec); }
-EXPORT_SYMBOL(timespec_to_jiffies); +EXPORT_SYMBOL(timespec64_to_jiffies);
void -jiffies_to_timespec(const unsigned long jiffies, struct timespec *value) +jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) { /* * Convert jiffies to nanoseconds and separate with @@ -587,7 +588,7 @@ jiffies_to_timespec(const unsigned long jiffies, struct timespec *value) NSEC_PER_SEC, &rem); value->tv_nsec = rem; } -EXPORT_SYMBOL(jiffies_to_timespec); +EXPORT_SYMBOL(jiffies_to_timespec64);
/* * We could use a similar algorithm to timespec_to_jiffies (with a
-
Baolin Wang