linux-kernel - Re: objtool warnings in prerelease clang-9

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Message-ID: <20190711000447.5btnvuzc45zjrcb4@treble>
Date:   Wed, 10 Jul 2019 19:04:47 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Kees Cook <keescook@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Craig Topper <craig.topper@...el.com>,
        Alexander Potapenko <glider@...gle.com>,
        Bill Wendling <morbo@...gle.com>,
        Stephen Hines <srhines@...gle.com>
Subject: Re: objtool warnings in prerelease clang-9

On Wed, Jul 10, 2019 at 04:42:43PM -0700, Nick Desaulniers wrote:
>       7e: 0f 85 00 00 00 00            jne 0
> <x86_early_init_platform_quirks+0x84>
> 0000000000000080:  R_X86_64_PC32 __x86_indirect_thunk_r11-4
>       84: c3                            retq
> 
> I've sent you the .o file off thread as well.  Thanks for taking a
> look into this. :D

Ah, right.  I forgot it was a retpoline jump.  I had a patch for that as
well, will test with the .o and post tomorrow-ish.

-- 
Josh