linux-kernel - Re: [PATCH 01/13] tracing: Extract duplicate ftrace_raw_init_event

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Date:	Mon, 7 Dec 2009 15:27:05 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/13] tracing: Extract duplicate ftrace_raw_init_event_foo()

2009/12/7 Li Zefan <lizf@...fujitsu.com>:

> +static int ftrace_raw_init_event_##call(struct ftrace_event_call *event_call)\
> +{                                                                      \
> +       int id;                                                         \
> +                                                                       \
> +       id = register_ftrace_event(event_call->event);                  \
> +       if (!id)                                                        \
> +               return -ENODEV;                                         \
> +       event_call->id = id;                                            \
> +       INIT_LIST_HEAD(&event_call->fields);                            \
> +       return 0;                                                       \
>  }


This function doesn't vary anymore in this form.
May be can we define a generic one in trace_event.c and only reference
this one?

Or even better, may be can we drop this callback field and statically call this
code when we intialize an event. IIRC, the syscall raw_init_event has the
same callback, may be it's even the same for kprobes events (I can't
check right now).