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Date: Fri, 1 Feb 2019 02:31:36 +0000
From: Christopher Lameter <>
To: Thomas Garnier <>
cc: Kernel Hardening <>,, Andy Lutomirski <>, 
    Thomas Gleixner <>, Ingo Molnar <>, 
    Borislav Petkov <>, "H. Peter Anvin" <>, 
    the arch/x86 maintainers <>, Dennis Zhou <>, 
    Tejun Heo <>, Boris Ostrovsky <>, 
    Juergen Gross <>, 
    Stefano Stabellini <>, 
    Andrew Morton <>, Andi Kleen <>, 
    "Kirill A. Shutemov" <>, 
    Michal Hocko <>, Mike Rapoport <>, 
    Stephen Rothwell <>, 
    Cao jin <>, Brijesh Singh <>, 
    Masahiro Yamada <>, 
    Joerg Roedel <>, Peter Zijlstra <>, 
    Kees Cook <>, 
    Mathieu Desnoyers <>, 
    LKML <>, 
    xen-devel <>
Subject: Re: [PATCH v6 14/27] x86/percpu: Adapt percpu for PIE support

On Thu, 31 Jan 2019, Thomas Garnier wrote:

> The per-cpu symbols are in a section that is zero based to create
> offsets. The compiler doesn't see them as offsets but as relative
> symbol and try to relocate them. Given the distance between zero and
> the mapped kernel is much larger than the instruction offset range, it
> fails to do it.

We switch that off in the linker. If that does not work with your
modifications then you need to figure out how to update the link

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