diff options
Diffstat (limited to 'kernel/trace/trace_clock.c')
| -rw-r--r-- | kernel/trace/trace_clock.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c index aa8f5f48dae..57b67b1f24d 100644 --- a/kernel/trace/trace_clock.c +++ b/kernel/trace/trace_clock.c @@ -57,6 +57,17 @@ u64 notrace trace_clock(void) return local_clock(); } +/* + * trace_jiffy_clock(): Simply use jiffies as a clock counter. + * Note that this use of jiffies_64 is not completely safe on + * 32-bit systems. But the window is tiny, and the effect if + * we are affected is that we will have an obviously bogus + * timestamp on a trace event - i.e. not life threatening. + */ +u64 notrace trace_clock_jiffies(void) +{ + return jiffies_64_to_clock_t(jiffies_64 - INITIAL_JIFFIES); +} /* * trace_clock_global(): special globally coherent trace clock |