The default implementation of the event_idx callback (perf_event_idx_default) returns 0. Let's update the comment for the callback to reflect this, as it currently indicates an incorrect value.
Signed-off-by: Andrew Murray <[email protected]> --- include/linux/perf_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index e47ef764f613..27c1cb3cddf1 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -392,7 +392,7 @@ struct pmu { /* * Will return the value for perf_event_mmap_page::index for this event, - * if no implementation is provided it will default to: event->hw.idx + 1. + * if no implementation is provided it will default to: 0. */ int (*event_idx) (struct perf_event *event); /*optional */ -- 2.21.0
