diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2014-07-16 21:05:04 +0000 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2014-07-23 15:01:49 -0700 |
| commit | f519b1a2e08c913375324a927992bb328387f169 (patch) | |
| tree | 0a4ccfd703fc4bed1da94cf9f1ed355f0eda0a60 /kernel/time | |
| parent | 2044fdb03eb4e511d5028be0917899931f17461f (diff) | |
| download | linux-f519b1a2e08c913375324a927992bb328387f169.tar.gz linux-f519b1a2e08c913375324a927992bb328387f169.tar.bz2 linux-f519b1a2e08c913375324a927992bb328387f169.zip | |
timekeeping: Provide ktime_get_raw()
Provide a ktime_t based interface for raw monotonic time.
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 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 118e91e3071c..af8051f4420d 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -305,6 +305,9 @@ static inline void tk_update_ktime_data(struct timekeeper *tk) nsec *= NSEC_PER_SEC; nsec += tk->wall_to_monotonic.tv_nsec; tk->base_mono = ns_to_ktime(nsec); + + /* Update the monotonic raw base */ + tk->base_raw = timespec64_to_ktime(tk->raw_time); } /* must hold timekeeper_lock */ @@ -467,6 +470,27 @@ ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs) EXPORT_SYMBOL_GPL(ktime_mono_to_any); /** + * ktime_get_raw - Returns the raw monotonic time in ktime_t format + */ +ktime_t ktime_get_raw(void) +{ + struct timekeeper *tk = &tk_core.timekeeper; + unsigned int seq; + ktime_t base; + s64 nsecs; + + do { + seq = read_seqcount_begin(&tk_core.seq); + base = tk->base_raw; + nsecs = timekeeping_get_ns_raw(tk); + + } while (read_seqcount_retry(&tk_core.seq, seq)); + + return ktime_add_ns(base, nsecs); +} +EXPORT_SYMBOL_GPL(ktime_get_raw); + +/** * ktime_get_ts64 - get the monotonic clock in timespec64 format * @ts: pointer to timespec variable * @@ -878,6 +902,7 @@ void __init timekeeping_init(void) tk_set_xtime(tk, &now); tk->raw_time.tv_sec = 0; tk->raw_time.tv_nsec = 0; + tk->base_raw.tv64 = 0; if (boot.tv_sec == 0 && boot.tv_nsec == 0) boot = tk_xtime(tk); |