This patch introduces some functions for converting cputime to timespec64 and back, that repalce the timespec type with timespec64 type, as well as for arch/s390 and arch/powerpc architecture.
And these new methods will replace the old cputime_to_timespec/timespec_to_cputime function to ready for 2038 issue. The cputime_to_timespec/timespec_to_cputime functions are moved to include/linux/cputime.h file for removing conveniently.
Signed-off-by: Baolin Wang baolin.wang@linaro.org --- arch/powerpc/include/asm/cputime.h | 6 +++--- arch/s390/include/asm/cputime.h | 8 ++++---- include/asm-generic/cputime_jiffies.h | 10 +++++----- include/linux/cputime.h | 15 +++++++++++++++ include/linux/jiffies.h | 3 +++ kernel/time/time.c | 21 +++++++++++++++++++++ 6 files changed, 51 insertions(+), 12 deletions(-)
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h index e245255..5dda5c0 100644 --- a/arch/powerpc/include/asm/cputime.h +++ b/arch/powerpc/include/asm/cputime.h @@ -154,9 +154,9 @@ static inline cputime_t secs_to_cputime(const unsigned long sec) }
/* - * Convert cputime <-> timespec + * Convert cputime <-> timespec64 */ -static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p) +static inline void cputime_to_timespec64(const cputime_t ct, struct timespec64 *p) { u64 x = (__force u64) ct; unsigned int frac; @@ -168,7 +168,7 @@ static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p) p->tv_nsec = x; }
-static inline cputime_t timespec_to_cputime(const struct timespec *p) +static inline cputime_t timespec64_to_cputime(const struct timespec64 *p) { u64 ct;
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h index b91e960..1266697 100644 --- a/arch/s390/include/asm/cputime.h +++ b/arch/s390/include/asm/cputime.h @@ -89,16 +89,16 @@ static inline cputime_t secs_to_cputime(const unsigned int s) }
/* - * Convert cputime to timespec and back. + * Convert cputime to timespec64 and back. */ -static inline cputime_t timespec_to_cputime(const struct timespec *value) +static inline cputime_t timespec64_to_cputime(const struct timespec64 *value) { unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC; return (__force cputime_t)(ret + __div(value->tv_nsec * CPUTIME_PER_USEC, NSEC_PER_USEC)); }
-static inline void cputime_to_timespec(const cputime_t cputime, - struct timespec *value) +static inline void cputime_to_timespec64(const cputime_t cputime, + struct timespec64 *value) { unsigned long long __cputime = (__force unsigned long long) cputime; #ifndef CONFIG_64BIT diff --git a/include/asm-generic/cputime_jiffies.h b/include/asm-generic/cputime_jiffies.h index fe386fc..ec77c0b 100644 --- a/include/asm-generic/cputime_jiffies.h +++ b/include/asm-generic/cputime_jiffies.h @@ -44,12 +44,12 @@ typedef u64 __nocast cputime64_t; #define secs_to_cputime(sec) jiffies_to_cputime((sec) * HZ)
/* - * Convert cputime to timespec and back. + * Convert cputime to timespec64 and abck. */ -#define timespec_to_cputime(__val) \ - jiffies_to_cputime(timespec_to_jiffies(__val)) -#define cputime_to_timespec(__ct,__val) \ - jiffies_to_timespec(cputime_to_jiffies(__ct),__val) +#define timespec64_to_cputime(__val) \ + jiffies_to_cputime(timespec64_to_jiffies(__val)) +#define cputime_to_timespec64(__ct,__val) \ + jiffies_to_timespec64(cputime_to_jiffies(__ct),__val)
/* * Convert cputime to timeval and back. diff --git a/include/linux/cputime.h b/include/linux/cputime.h index f2eb2ee..f01896f 100644 --- a/include/linux/cputime.h +++ b/include/linux/cputime.h @@ -13,4 +13,19 @@ usecs_to_cputime((__nsecs) / NSEC_PER_USEC) #endif
+static inline cputime_t timespec_to_cputime(const struct timespec *ts) +{ + struct timespec64 ts64 = timespec_to_timespec64(*ts); + return timespec64_to_cputime(&ts64); +} + +static inline void cputime_to_timespec(const cputime_t cputime, + struct timespec *value) +{ + struct timespec64 *ts64; + + *ts64 = timespec_to_timespec64(*value); + cputime_to_timespec64(cputime, ts64); +} + #endif /* __LINUX_CPUTIME_H */ diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h index c367cbd..dbaa4ee 100644 --- a/include/linux/jiffies.h +++ b/include/linux/jiffies.h @@ -293,6 +293,9 @@ 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 timespec64_to_jiffies(const struct timespec64 *value); +extern void jiffies_to_timespec64(const unsigned long jiffies, + struct timespec64 *value); 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 2c85b77..d5978c5 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -606,6 +606,27 @@ jiffies_to_timespec(const unsigned long jiffies, struct timespec *value) } EXPORT_SYMBOL(jiffies_to_timespec);
+unsigned long +timespec64_to_jiffies(const struct timespec64 *value) +{ + return __timespec_to_jiffies(value->tv_sec, value->tv_nsec); +} +EXPORT_SYMBOL(timespec64_to_jiffies); + +void +jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) +{ + /* + * Convert jiffies to nanoseconds and separate with + * one divide. + */ + u32 rem; + value->tv_sec = div_u64_rem((u64)jiffies * TICK_NSEC, + NSEC_PER_SEC, &rem); + value->tv_nsec = rem; +} +EXPORT_SYMBOL(jiffies_to_timespec64); + /* * We could use a similar algorithm to timespec_to_jiffies (with a * different multiplier for usec instead of nsec). But this has a