Em Wed, Jan 15, 2014 at 11:18:39AM -0500, Steven Rostedt escreveu:
> On Wed, 15 Jan 2014 10:45:29 +0900
> Namhyung Kim <namhy...@kernel.org> wrote:
>
> > pr_stat("overriding event (%d) %s:%s with new print handler",
> > event->id, event->system, event->name);
> > @@ -5637,6 +5649,79 @@ int pevent_register_event_handler(struct pevent
> > *pevent, int id,
> > return -1;
> > }
> >
> > +static int handle_matches(struct event_handler *handler, int id,
> > + const char *sys_name, const char *event_name,
> > + pevent_event_handler_func func, void *context)
> > +{
> > + if (id >= 0 && id != handler->id)
> > + return 0;
> > +
> > + if (event_name && (strcmp(event_name, handler->event_name) != 0))
> > + return 0;
> > +
> > + if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
> > + return 0;
> > +
> > + if (func != handler->func || context != handler->context)
> > + return 0;
> > +
> > + return 1;
> > +}
> > +
> > +/**
> > + * pevent_unregister_event_handler - unregister an existing event handler
> > + * @pevent: the handle to the pevent
> > + * @id: the id of the event to unregister
> > + * @sys_name: the system name the handler belongs to
> > + * @event_name: the name of the event handler
> > + * @func: the function to call to parse the event information
> > + * @context: the data to be passed to @func
> > + *
> > + * This function removes existing event handler (parser).
> > + *
> > + * If @id is >= 0, then it is used to find the event.
> > + * else @sys_name and @event_name are used.
> > + *
> > + * Returns 0 if handler was removed successfully, -1 if event was not
> > found.
> > + */
> > +int pevent_unregister_event_handler(struct pevent *pevent, int id,
> > + const char *sys_name, const char
> > *event_name,
> > + pevent_event_handler_func func, void
> > *context)
> > +{
> > + struct event_format *event;
> > + struct event_handler *handle;
> > + struct event_handler **next;
> > +
> > + event = pevent_search_event(pevent, id, sys_name, event_name);
> > + if (event == NULL)
> > + goto not_found;
> > +
> > + if (event->handler == func && event->context == context) {
> > + pr_stat("overriding event (%d) %s:%s with default print
> > handler",
>
> Should we use the word "overriding" again? Perhaps saying:
>
> "removing override print handler (%d) %s:%s. Going back to default handler."
>
> Or something?
Applied up to the patch just before this one, waiting for a resolution.
> -- Steve
>
> > + event->id, event->system, event->name);
> > +
> > + event->handler = NULL;
> > + event->context = NULL;
> > + return 0;
> > + }
> > +
> > +not_found:
> > + for (next = &pevent->handlers; *next; next = &(*next)->next) {
> > + handle = *next;
> > + if (handle_matches(handle, id, sys_name, event_name,
> > + func, context))
> > + break;
> > + }
> > +
> > + if (!(*next))
> > + return -1;
> > +
> > + *next = handle->next;
> > + free_handler(handle);
> > +
> > + return 0;
> > +}
> > +
--
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