linux-kernel - Re: [PATCH 04/10] ARM: ftrace: allow building without frame pointers

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Message-ID: <1268842609.15804.7.camel@e102109-lin.cambridge.arm.com>
Date:	Wed, 17 Mar 2010 16:16:49 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Rabin Vincent <rabin@....in>,
	Abhishek Sagar <sagar.abhishek@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 04/10] ARM: ftrace: allow building without frame
 pointers

On Sun, 2010-03-14 at 16:56 +0000, Steven Rostedt wrote:
> On Sat, 2010-03-13 at 12:19 +0530, Rabin Vincent wrote:
> > With a new enough GCC, ARM function tracing can be supported without the
> > need for frame pointers.  This is essential for Thumb-2 support, since
> > frame pointers aren't available then.
> >
> > Signed-off-by: Rabin Vincent <rabin@....in>
> 
> > diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> > index 13e13d4..e10519f 100644
> > --- a/kernel/trace/Kconfig
> > +++ b/kernel/trace/Kconfig
> > @@ -124,7 +124,7 @@ if FTRACE
> >  config FUNCTION_TRACER
> >       bool "Kernel Function Tracer"
> >       depends on HAVE_FUNCTION_TRACER
> > -     select FRAME_POINTER
> > +     select FRAME_POINTER if (!ARM_UNWIND)
> 
> I'm fine with this if the ARM maintainers are.
> 
> Acked-by: Steven Rostedt <rostedt@...dmis.org>

I think we did this already in other places, so:

Acked-by: Catalin Marinas <catalin.marinas@....com>

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