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| author | Peter Zijlstra <peterz@infradead.org> | 2015-03-19 09:39:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-27 09:45:09 +0100 |
| commit | f09cb9a1808e35ad7502ea39b6bfb443c7fa0f19 (patch) | |
| tree | 1a172f02117de052a2de202b8db41e32e76b1d15 /kernel/time/timekeeping.c | |
| parent | 4498e7467e9e441c18ca12f1ca08460356e0508a (diff) | |
| download | talos-obmc-linux-f09cb9a1808e35ad7502ea39b6bfb443c7fa0f19.tar.gz talos-obmc-linux-f09cb9a1808e35ad7502ea39b6bfb443c7fa0f19.zip | |
time: Introduce tk_fast_raw
Add the NMI safe CLOCK_MONOTONIC_RAW accessor..
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150319093400.562746929@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/timekeeping.c')
| -rw-r--r-- | kernel/time/timekeeping.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 278373edb472..c3fcff06d30a 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -59,6 +59,7 @@ struct tk_fast { }; static struct tk_fast tk_fast_mono ____cacheline_aligned; +static struct tk_fast tk_fast_raw ____cacheline_aligned; /* flag for if timekeeping is suspended */ int __read_mostly timekeeping_suspended; @@ -434,6 +435,12 @@ u64 ktime_get_mono_fast_ns(void) } EXPORT_SYMBOL_GPL(ktime_get_mono_fast_ns); +u64 ktime_get_raw_fast_ns(void) +{ + return __ktime_get_fast_ns(&tk_fast_raw); +} +EXPORT_SYMBOL_GPL(ktime_get_raw_fast_ns); + /* Suspend-time cycles value for halted fast timekeeper. */ static cycle_t cycles_at_suspend; @@ -461,6 +468,11 @@ static void halt_fast_timekeeper(struct timekeeper *tk) cycles_at_suspend = tkr->read(tkr->clock); tkr_dummy.read = dummy_clock_read; update_fast_timekeeper(&tkr_dummy, &tk_fast_mono); + + tkr = &tk->tkr_raw; + memcpy(&tkr_dummy, tkr, sizeof(tkr_dummy)); + tkr_dummy.read = dummy_clock_read; + update_fast_timekeeper(&tkr_dummy, &tk_fast_raw); } #ifdef CONFIG_GENERIC_TIME_VSYSCALL_OLD @@ -592,6 +604,7 @@ static void timekeeping_update(struct timekeeper *tk, unsigned int action) sizeof(tk_core.timekeeper)); update_fast_timekeeper(&tk->tkr_mono, &tk_fast_mono); + update_fast_timekeeper(&tk->tkr_raw, &tk_fast_raw); } /** |
