The following commit has been merged into the timers/urgent branch of tip:
Commit-ID: 2c33d775ef4c25c0e1e1cc0fd5496d02f76bfa20 Gitweb: https://git.kernel.org/tip/2c33d775ef4c25c0e1e1cc0fd5496d02f76bfa20 Author: Kurt Kanzenbach kurt@linutronix.de AuthorDate: Thu, 28 Apr 2022 08:24:32 +02:00 Committer: Thomas Gleixner tglx@linutronix.de CommitterDate: Fri, 29 Apr 2022 00:07:53 +02:00
timekeeping: Mark NMI safe time accessors as notrace
Mark the CLOCK_MONOTONIC fast time accessors as notrace. These functions are used in tracing to retrieve timestamps, so they should not recurse.
Fixes: 4498e7467e9e ("time: Parametrize all tk_fast_mono users") Fixes: f09cb9a1808e ("time: Introduce tk_fast_raw") Reported-by: Steven Rostedt rostedt@goodmis.org Signed-off-by: Kurt Kanzenbach kurt@linutronix.de Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220426175338.3807ca4f@gandalf.local.home/ Link: https://lore.kernel.org/r/20220428062432.61063-1-kurt@linutronix.de --- kernel/time/timekeeping.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index dcdcb85..3b1398f 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -482,7 +482,7 @@ static __always_inline u64 __ktime_get_fast_ns(struct tk_fast *tkf) * of the following timestamps. Callers need to be aware of that and * deal with it. */ -u64 ktime_get_mono_fast_ns(void) +u64 notrace ktime_get_mono_fast_ns(void) { return __ktime_get_fast_ns(&tk_fast_mono); } @@ -494,7 +494,7 @@ EXPORT_SYMBOL_GPL(ktime_get_mono_fast_ns); * Contrary to ktime_get_mono_fast_ns() this is always correct because the * conversion factor is not affected by NTP/PTP correction. */ -u64 ktime_get_raw_fast_ns(void) +u64 notrace ktime_get_raw_fast_ns(void) { return __ktime_get_fast_ns(&tk_fast_raw); }