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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-07-16 21:04:22 +0000 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2014-07-23 10:18:01 -0700 |
| commit | 9a6b51976ea3a326b6de534beec3fd87275f4ef6 (patch) | |
| tree | 4f9eed2b231c527dab091620da6354fff97eae28 /kernel/time | |
| parent | 48064f5f67d58f95094305ac575d5372b58e265f (diff) | |
| download | linux-9a6b51976ea3a326b6de534beec3fd87275f4ef6.tar.gz linux-9a6b51976ea3a326b6de534beec3fd87275f4ef6.tar.bz2 linux-9a6b51976ea3a326b6de534beec3fd87275f4ef6.zip | |
timekeeping: Provide ktime_mono_to_any()
ktime based conversion function to map a monotonic time stamp to a
different CLOCK.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/timekeeping.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index e99350319eec..032e77a54a79 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -451,6 +451,26 @@ ktime_t ktime_get_with_offset(enum tk_offsets offs) EXPORT_SYMBOL_GPL(ktime_get_with_offset); /** + * ktime_mono_to_any() - convert mononotic time to any other time + * @tmono: time to convert. + * @offs: which offset to use + */ +ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs) +{ + ktime_t *offset = offsets[offs]; + unsigned long seq; + ktime_t tconv; + + do { + seq = read_seqcount_begin(&tk_core.seq); + tconv = ktime_add(tmono, *offset); + } while (read_seqcount_retry(&tk_core.seq, seq)); + + return tconv; +} +EXPORT_SYMBOL_GPL(ktime_mono_to_any); + +/** * ktime_get_ts64 - get the monotonic clock in timespec64 format * @ts: pointer to timespec variable * |