diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-12 22:17:48 +0900 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-12 22:17:48 +0900 |
commit | 03d3602a833715f83ea53b9feb078b9c4c5f6c1a (patch) | |
tree | 7b63ec6753dd65e61392017e1aba2ee1e6b4bcd1 /arch/x86/vdso/vclock_gettime.c | |
parent | 0588f1f934791b79d0a1e9b327be9b6eb361d2b8 (diff) | |
parent | 5b3900cd409466c0070b234d941650685ad0c791 (diff) |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer core update from Thomas Gleixner:
- Bug fixes (one for a longstanding dead loop issue)
- Rework of time related vsyscalls
- Alarm timer updates
- Jiffies updates to remove compile time dependencies
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timekeeping: Cast raw_interval to u64 to avoid shift overflow
timers: Fix endless looping between cascade() and internal_add_timer()
time/jiffies: bring back unconditional LATCH definition
time: Convert x86_64 to using new update_vsyscall
time: Only do nanosecond rounding on GENERIC_TIME_VSYSCALL_OLD systems
time: Introduce new GENERIC_TIME_VSYSCALL
time: Convert CONFIG_GENERIC_TIME_VSYSCALL to CONFIG_GENERIC_TIME_VSYSCALL_OLD
time: Move update_vsyscall definitions to timekeeper_internal.h
time: Move timekeeper structure to timekeeper_internal.h for vsyscall changes
jiffies: Remove compile time assumptions about CLOCK_TICK_RATE
jiffies: Kill unused TICK_USEC_TO_NSEC
alarmtimer: Rename alarmtimer_remove to alarmtimer_dequeue
alarmtimer: Remove unused helpers & defines
alarmtimer: Use hrtimer per-alarm instead of per-base
alarmtimer: Implement minimum alarm interval for allowing suspend
Diffstat (limited to 'arch/x86/vdso/vclock_gettime.c')
-rw-r--r-- | arch/x86/vdso/vclock_gettime.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c index 885eff49d6ab..4df6c373421a 100644 --- a/arch/x86/vdso/vclock_gettime.c +++ b/arch/x86/vdso/vclock_gettime.c @@ -80,7 +80,7 @@ notrace static long vdso_fallback_gtod(struct timeval *tv, struct timezone *tz) } -notrace static inline long vgetns(void) +notrace static inline u64 vgetsns(void) { long v; cycles_t cycles; @@ -91,21 +91,24 @@ notrace static inline long vgetns(void) else return 0; v = (cycles - gtod->clock.cycle_last) & gtod->clock.mask; - return (v * gtod->clock.mult) >> gtod->clock.shift; + return v * gtod->clock.mult; } /* Code size doesn't matter (vdso is 4k anyway) and this is faster. */ notrace static int __always_inline do_realtime(struct timespec *ts) { - unsigned long seq, ns; + unsigned long seq; + u64 ns; int mode; + ts->tv_nsec = 0; do { seq = read_seqcount_begin(>od->seq); mode = gtod->clock.vclock_mode; ts->tv_sec = gtod->wall_time_sec; - ts->tv_nsec = gtod->wall_time_nsec; - ns = vgetns(); + ns = gtod->wall_time_snsec; + ns += vgetsns(); + ns >>= gtod->clock.shift; } while (unlikely(read_seqcount_retry(>od->seq, seq))); timespec_add_ns(ts, ns); @@ -114,15 +117,18 @@ notrace static int __always_inline do_realtime(struct timespec *ts) notrace static int do_monotonic(struct timespec *ts) { - unsigned long seq, ns; + unsigned long seq; + u64 ns; int mode; + ts->tv_nsec = 0; do { seq = read_seqcount_begin(>od->seq); mode = gtod->clock.vclock_mode; ts->tv_sec = gtod->monotonic_time_sec; - ts->tv_nsec = gtod->monotonic_time_nsec; - ns = vgetns(); + ns = gtod->monotonic_time_snsec; + ns += vgetsns(); + ns >>= gtod->clock.shift; } while (unlikely(read_seqcount_retry(>od->seq, seq))); timespec_add_ns(ts, ns); |