* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> On Mon, 2011-05-16 at 18:52 +0200, Ingo Molnar wrote:
> > * Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> >
> > > I'm a bit nervous about the 'active' role of (trace_)events, because of the
> > > way multiple callbacks can be registered. How would:
> > >
> > > err = event_x();
> > > if (err == -EACCESS) {
> > >
> > > be handled? [...]
> >
> > The default behavior would be something obvious: to trigger all callbacks and
> > use the first non-zero return value.
>
> But how do we know which callback that was from? There's no ordering of what
> callbacks are called first.
We do not have to know that - nor do the calling sites care in general. Do you
have some specific usecase in mind where the identity of the callback that
generates a match matters?
Thanks,
Ingo
