linux-kernel - Re: [PATCH 2/3] powerpc: Make it possible to safely select CONFIG_FRAME

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Message-ID: <20090205013023.GA31417@oksana.dev.rtsoft.ru>
Date:	Thu, 5 Feb 2009 04:30:23 +0300
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Steven Rostedt <srostedt@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Paul Mackerras <paulus@...ba.org>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org
Subject: Re: [PATCH 2/3] powerpc: Make it possible to safely select
	CONFIG_FRAME_POINTER

On Thu, Feb 05, 2009 at 12:15:31PM +1100, Benjamin Herrenschmidt wrote:
> On Wed, 2009-02-04 at 19:35 -0500, Steven Rostedt wrote:
> > On Thu, 2009-02-05 at 11:31 +1100, Benjamin Herrenschmidt wrote:
> > > On Wed, 2009-02-04 at 18:08 +0300, Anton Vorontsov wrote:
> > > > Remove -fno-omit-frame-pointer flag from CFLAGS.
> > > > Remove -fno-omit-frame-pointer workarounds.
> > > 
> > > But what about -pg -requires -fno-omit-frame-pointer ?
> > 
> > I don't think it requires -fno-omit-frame-pointer. It is just
> > incompatible with -fomit-frame-pointer.
> 
> From a quick test, you seem to be right.
> 
> Now the question of course is whether -pg will internally trigger
> the bug for which we need the workaround tho...

According to http://marc.info/?l=linux-kernel&m=121958694215835&w=4
just removing -fno-omit-frame-pointer solved the problem.

But I'll double check that on the actual hardware.

Thanks,

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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