On Wed, 2011-05-18 at 21:07 -0700, Will Drewry wrote:

Do event_* that return non-void exist in the tree at all now?  I've
looked at the various tracepoint macros as well as some of the other
handlers (trace_function, perf_tp_event, etc) and I'm not seeing any
places where a return value is honored nor could be.  At best, the
perf_tp_event can be short-circuited it in the hlist_for_each, but
it'd still need a way to bubble up a failure and result in not calling
the trace/event that the hook precedes.

No, none of the current trace hooks have return values. That was what I
was talking about how to implement in my previous emails.

-- Steve