linux-kernel - Re: [PATCH v4 1/6] arm64: ftrace: adjust callsite addresses examined by stack tracer

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Message-ID: <20151102182928.GJ2684@leverpostej>
Date:	Mon, 2 Nov 2015 18:29:28 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Will Deacon <will.deacon@....com>, jungseoklee85@...il.com,
	catalin.marinas@....com, linux-kernel@...r.kernel.org,
	AKASHI Takahiro <takahiro.akashi@...aro.org>,
	broonie@...nel.org, david.griego@...aro.org, olof@...om.net,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 1/6] arm64: ftrace: adjust callsite addresses examined
 by stack tracer

On Mon, Nov 02, 2015 at 01:20:43PM -0500, Steven Rostedt wrote:
> On Fri, 30 Oct 2015 11:16:19 +0000
> Will Deacon <will.deacon@....com> wrote:
> 
> > On Fri, Oct 30, 2015 at 02:25:36PM +0900, AKASHI Takahiro wrote:
> > > On arm64, no PC values returned by save_stack_trace() will match to LR
> > > values saved in stack frames on a stack after the following commit:
> > >     commit e306dfd06fcb ("ARM64: unwind: Fix PC calculation")
> > > As a result, the output from stack tracer will be messed up.
> > 
> > FWIW, we've decided to revert that patch for the moment. We're the only
> > architecture making that kind of adjustment, so we should fix that before
> > building on top of it.
> > 
> >
> 
> What is the status of this patch set. I'm currently pulling in last
> minute patches for 4.3 and should the ftrace patch in this series be
> applied? (I still need to review it too).

The revert Will mentioned is in v4.3 (see commit 9702970c7bd3e2d6), so
this series needs a respin to account for that.

Thanks,
Mark.
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