Commit-ID: f09cb9a1808e35ad7502ea39b6bfb443c7fa0f19 Gitweb: http://git.kernel.org/tip/f09cb9a1808e35ad7502ea39b6bfb443c7fa0f19 Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Thu, 19 Mar 2015 09:39:08 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Fri, 27 Mar 2015 09:45:09 +0100
time: Introduce tk_fast_raw Add the NMI safe CLOCK_MONOTONIC_RAW accessor.. Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Acked-by: John Stultz <john.stu...@linaro.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/20150319093400.562746...@infradead.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- include/linux/timekeeping.h | 1 + kernel/time/timekeeping.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 3eaae47..f36b1ed 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -220,6 +220,7 @@ static inline u64 ktime_get_raw_ns(void) } extern u64 ktime_get_mono_fast_ns(void); +extern u64 ktime_get_raw_fast_ns(void); /* * Timespec interfaces utilizing the ktime based ones diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 278373e..c3fcff0 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); } /** -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
