Messages in this thread | | | Subject | Re: [PATCH v5 4/4] tracing: Have existing event_command.parse() implementations use helpers | From | Tom Zanussi <> | Date | Sat, 08 Jan 2022 22:23:03 -0600 |
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Hi Steve,
On Sat, 2022-01-08 at 19:54 -0500, Steven Rostedt wrote: > On Tue, 14 Dec 2021 12:57:32 -0600 > Tom Zanussi <zanussi@kernel.org> wrote: > > > index da103826f27e..e6a48e8c79eb 100644 > > --- a/kernel/trace/trace_events_trigger.c > > +++ b/kernel/trace/trace_events_trigger.c > > @@ -973,7 +973,7 @@ int event_trigger_register(struct event_command > > *cmd_ops, > > * @file: The trace_event_file associated with the event > > * @glob: The raw string used to register the trigger > > * @cmd: The cmd portion of the string used to register the > > trigger > > - * @param: The params portion of the string used to register the > > trigger > > + * @param_and_filter: The param and filter portion of the string > > used to register the trigger > > * > > * Common implementation for event command parsing and trigger > > * instantiation. > > @@ -986,94 +986,53 @@ int event_trigger_register(struct > > event_command *cmd_ops, > > static int > > event_trigger_parse(struct event_command *cmd_ops, > > struct trace_event_file *file, > > - char *glob, char *cmd, char *param) > > + char *glob, char *cmd, char *param_and_filter) > > { > > struct event_trigger_data *trigger_data; > > struct event_trigger_ops *trigger_ops; > > - char *trigger = NULL; > > - char *number; > > + char *param, *filter; > > + bool remove; > > int ret; > > > > - /* separate the trigger from the filter (t:n [if filter]) */ > > - if (param && isdigit(param[0])) { > > - trigger = strsep(¶m, " \t"); > > - if (param) { > > - param = skip_spaces(param); > > - if (!*param) > > - param = NULL; > > - } > > - } > > + remove = event_trigger_check_remove(glob); > > > > - trigger_ops = cmd_ops->get_trigger_ops(cmd, trigger); > > Did you mean to remove the assignment of trigger_ops here?
Hmm, yeah, that shouldn't have been removed, but...
> > > + ret = event_trigger_separate_filter(param_and_filter, ¶m, > > &filter, false); > > + if (ret) > > + return ret; > > > > ret = -ENOMEM; > > - trigger_data = kzalloc(sizeof(*trigger_data), GFP_KERNEL); > > + trigger_data = event_trigger_alloc(cmd_ops, cmd, param, file); > > if (!trigger_data) > > goto out; > > > > - trigger_data->count = -1; > > - trigger_data->ops = trigger_ops; > > - trigger_data->cmd_ops = cmd_ops; > > - trigger_data->private_data = file; > > - INIT_LIST_HEAD(&trigger_data->list); > > - INIT_LIST_HEAD(&trigger_data->named_list); > > - > > - if (glob[0] == '!') { > > + if (remove) { > > cmd_ops->unreg(glob+1, trigger_ops, trigger_data, > > file); > > It's still used here and below. > > I get a warning on this.
I'm not getting a warning, and remove should have crashed the testcases, but I'm not seeing that either.
Will have to investigate tomorrow..
Tom
> > Thanks, > > -- Steve > > > kfree(trigger_data);
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