From 166afb64511eef08e13331b970c44fe91cea45ef Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 16 Jul 2014 21:03:55 +0000 Subject: [PATCH] ktime: Sanitize ktime_to_us/ms conversion With the plain nanoseconds based ktime_t we can simply use ktime_divns() instead of going through loops and hoops of timespec/timeval conversion. Reported-by: John Stultz Signed-off-by: Thomas Gleixner Signed-off-by: John Stultz --- include/linux/hrtimer.h | 6 ------ include/linux/ktime.h | 12 ++++++++---- kernel/time/hrtimer.c | 1 + 3 files changed, 9 insertions(+), 10 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index e84eb4f228cd..adf5056bd7b3 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -457,12 +457,6 @@ extern void hrtimer_run_pending(void); /* Bootup initialization: */ extern void __init hrtimers_init(void); -#if BITS_PER_LONG < 64 -extern u64 ktime_divns(const ktime_t kt, s64 div); -#else /* BITS_PER_LONG < 64 */ -# define ktime_divns(kt, div) (u64)((kt).tv64 / (div)) -#endif - /* Show pending timers: */ extern void sysrq_timer_list_show(void); diff --git a/include/linux/ktime.h b/include/linux/ktime.h index fbc64f8481b7..74eaba9b3569 100644 --- a/include/linux/ktime.h +++ b/include/linux/ktime.h @@ -157,16 +157,20 @@ static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2) return ktime_compare(cmp1, cmp2) < 0; } +#if BITS_PER_LONG < 64 +extern u64 ktime_divns(const ktime_t kt, s64 div); +#else /* BITS_PER_LONG < 64 */ +# define ktime_divns(kt, div) (u64)((kt).tv64 / (div)) +#endif + static inline s64 ktime_to_us(const ktime_t kt) { - struct timeval tv = ktime_to_timeval(kt); - return (s64) tv.tv_sec * USEC_PER_SEC + tv.tv_usec; + return ktime_divns(kt, NSEC_PER_USEC); } static inline s64 ktime_to_ms(const ktime_t kt) { - struct timeval tv = ktime_to_timeval(kt); - return (s64) tv.tv_sec * MSEC_PER_SEC + tv.tv_usec / USEC_PER_MSEC; + return ktime_divns(kt, NSEC_PER_MSEC); } static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier) diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 19f211051c35..64843a836637 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -280,6 +280,7 @@ u64 ktime_divns(const ktime_t kt, s64 div) return dclc; } +EXPORT_SYMBOL_GPL(ktime_divns); #endif /* BITS_PER_LONG >= 64 */ /* -- 2.20.1