linux-kernel - Re: TRACE_BRANCH_PROFILING breaks gcc warnings

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Message-ID: <20090415081253.GE18192@elte.hu>
Date:	Wed, 15 Apr 2009 10:12:53 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Steven Rostedt <srostedt@...hat.com>,
	Johannes Berg <johannes@...solutions.net>,
	Ingo Molnar <mingo@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: TRACE_BRANCH_PROFILING breaks gcc warnings


* Sam Ravnborg <sam@...nborg.org> wrote:

> > > This has been mentioned before, and I've asked about sending a 
> > > patch that would prevent TRACE_BRANCH_PROFILING from being 
> > > selected with an allyesconfig.
> > > 
> > > It is easy to do. I could make it a selection and not a 
> > > boolean and it will not select it as default, even for 
> > > allyes/modconfig
> 
> We should have a symbol that is only set for allyesconfig builds.
> 
> Then we could do something like:
> 
> config TRACE_BRANCH_PROFILING
> 	depends on !ALLYESCONFIG
> 
> The advantage is that it is obvious why we have defiend it like 
> this rather than some inverse symbols.
> 
> I looked at generating such symbol in kconfig long time ago but 
> never finished it.

ah, nice idea! Should be fairly simple to do, right?

The other option is to disable/remove the branch profiler 
altogether.

	Ingo
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