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

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Message-ID: <CAK8P3a3pSgmRXfd9WvfvLD6ptDS1NDS5rnqnNhQM77-4Qb+pMQ@mail.gmail.com>
Date:   Wed, 1 Mar 2017 16:21:36 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
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 1, 2017 at 3:31 PM, Josh Poimboeuf <jpoimboe@...hat.com> wrote:
> 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")

It was on the current linux-next, so that commit should certainly be included.

> Can you attach the object file?

done.

    Arnd

Download attachment "rxe_resp.o" of type "application/x-object" (20248 bytes)