On Wed, Oct 21, 2015 at 03:58:03PM -0700, Alexei Starovoitov wrote:
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 64754bfecd70..0b6333265872 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -3258,7 +3258,7 @@ static inline u64 perf_event_count(struct perf_event
> *event)
> u64 perf_event_read_local(struct perf_event *event)
> {
> unsigned long flags;
> - u64 val;
> + u64 val = -EINVAL;
No, you cannot do this, -EINVAL is a valid count value. You simply must
not call this function on !local events, ever.
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