linux-kernel - Re: [PATCH] [RFC] x86: avoid -mtune=atom for objtool warnings

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Message-ID: <20170301143135.arushx2c7q7bnyna@treble>
Date:   Wed, 1 Mar 2017 08:31:35 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Denys Vlasenko <dvlasenk@...hat.com>
Subject: Re: [PATCH] [RFC] x86: avoid -mtune=atom for objtool warnings

On Wed, Mar 01, 2017 at 10:34:42AM +0100, Arnd Bergmann wrote:
> On Tue, Oct 11, 2016 at 10:38 PM, Arnd Bergmann <arnd@...db.de> wrote:
> > On Tuesday, October 11, 2016 10:51:46 AM CEST Josh Poimboeuf wrote:
> >>
> >> 3) 0xFC244C03-config:
> >> drivers/scsi/fnic/fnic_main.o: warning: objtool: fnic_log_q_error() falls through to next function fnic_handle_link_event()
> >> drivers/scsi/snic/snic_res.o: warning: objtool: .text: unexpected end of section
> >>
> >> These look like another bad gcc bug which is truncating functions:
> >
> > Same bug for both of them?
> 
> I ran into this one again today, after updating to the latest gcc-7.0.1:
> 
> drivers/infiniband/sw/rxe/rxe_resp.o: warning: objtool:
> rxe_responder()+0xfe: sibling call from callable instruction with
> changed frame pointer
> 
> Josh, did you get around to updating objtool the last time I reported it, or
> is it still the same problem? If this is a new variation, I can provide more
> details about the failure, otherwise I'll just ignore it for now.

This one should have been fixed with:

  3732710ff6f2 ("objtool: Improve rare switch jump table pattern detection")

Can you attach the object file?

-- 
Josh