Re: [PATCH 0/3] x86 bugfixes for LTO

[Andi Kleen]

On Fri, Feb 09, 2018 at 10:24:33PM +0000, Chris Wilson wrote:
> Quoting Arnd Bergmann (2018-02-02 14:54:28)
> > Here are three bugfixes for x86 that I needed to get LTO-enabled
> > kernels to build reliably. I'm not sure abouto that first one
> > though.
> 
> Is there a howto on how to build LTO kernels? I tried Andi's lto-415-2
> branch, but linking fails with lots of arcane PIE-vs-PIC errors. We are
> wanting to investigate how we can use LTO to reduce our (i915.ko) module
> size (by e.g. supporting a subset of chipsets).

What are the errors? Kernel shouldn't use PIE or PIC

-Andi