linux-kernel - Re: [PATCH 1/4] tracing/events: fix compile for modules disabled

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Date:	Wed, 15 Apr 2009 12:27:33 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Christoph Hellwig <hch@....de>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Zhaolei <zhaolei@...fujitsu.com>, Li Zefan <lizf@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	"Frank Ch. Eigler" <fche@...stic.org>,
	Tom Zanussi <tzanussi@...il.com>,
	Jiaying Zhang <jiayingz@...gle.com>,
	Michael Rubin <mrubin@...gle.com>,
	Martin Bligh <mbligh@...gle.com>
Subject: Re: [PATCH 1/4] tracing/events: fix compile for modules disabled




On Wed, 15 Apr 2009, Frederic Weisbecker wrote:
> > +#else
> > +static int trace_module_notify(struct notifier_block *self,
> > +			       unsigned long val, void *data)
> 
> 
> 
> I don't remember when you register the module notifier but
> I guess it is on init time, then you can set this func as __init
> if !CONFIG_MODULES.
> 
> 
> > +{
> > +	return 0;
> > +}
> > +#endif /* CONFIG_MODULES */
> >  
> >  struct notifier_block trace_module_nb = {
> >  	.notifier_call = trace_module_notify,
> 
> 
> And then you can set this struct as __initdata_or_module, so
> that you can safely register this module notifier whatever
> config you have, and without consuming any space on the off case.

Good point. I'll update that.

-- Steve

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