linux-kernel - Re: [PATCH][GIT PULL][v2.6.32] tracing/x86: Add check to detect GCC messing with mcount prologue

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Message-ID: <20091122090531.GA21833@elte.hu>
Date:	Sun, 22 Nov 2009 10:05:31 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	feng.tang@...el.com, Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	David Daney <ddaney@...iumnetworks.com>,
	Andrew Haley <aph@...hat.com>,
	Richard Guenther <richard.guenther@...il.com>,
	jakub@...hat.com, gcc <gcc@....gnu.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH][GIT PULL][v2.6.32] tracing/x86: Add check to detect GCC
 messing with mcount prologue


* Steven Rostedt <rostedt@...dmis.org> wrote:

> Ingo, Thomas and Linus,
> 
> I know Thomas did a patch to force the -mtune=generic, but just in 
> case gcc decides to do something crazy again, this patch will catch 
> it.
> 
> Should we try to get this in now?

Very nice example of defensive coding - i like this. I've queued it up 
for .33 (unless anyone objects) as i think it's too late for .32.

	Ingo
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