linux-kernel - Re: [PATCH 20/21] Kbuild, lto: Add Link Time Optimization support

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Date:   Sun, 28 Jan 2018 10:33:35 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Andi Kleen <andi@...stfloor.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        samitolvanen@...gle.com, alxmtvv@...il.com,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 20/21] Kbuild, lto: Add Link Time Optimization support

> 
> kallsyms failure: relative symbol value 0xffffffff81000000 out of
> range in relative mode
> 
> I seem to get that all the time here, and have also disabled it for now,
> but it sounds important (and breaks the build).

Need to take a look at it. 

I had some patches that completely revamped kallsyms as part of the single
pass linking, but I dropped them again because they still had too many 
issues.

-Andi