linux-kernel - Re: [Bug #13185] New x86 warning

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Message-ID: <20090426093103.GA19267@elte.hu>
Date:	Sun, 26 Apr 2009 11:31:03 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>, Jeff Garzik <jeff@...zik.org>
Subject: Re: [Bug #13185] New x86 warning


* Rafael J. Wysocki <rjw@...k.pl> wrote:

> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.29.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=13185
> Subject		: New x86 warning
> Submitter	: Jeff Garzik <jeff@...zik.org>
> Date		: 2009-04-22 6:46 (4 days old)
> References	: http://marc.info/?l=linux-kernel&m=124038280020950&w=4

I saw this warning with certain GCC versions for several kernel 
cycles, so it's not any recent change that triggers this and it is 
not a regression.

GCC is simply wrong here - i have posted a workaround for that but 
it is too ugly to be merged upstream.

> Handled-By	: Andi Kleen <andi@...stfloor.org>
> Patch		: http://patchwork.kernel.org/patch/19330/
> 		  http://patchwork.kernel.org/patch/19406/

This patch regresses on older GCC versions and doesnt really address 
the GCC false positive warning either, it just removes the inline 
function that triggers the warning.

	Ingo
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