[PATCH] efi/arm: fix absolute relocation detection for older toolchains

[Ard Biesheuvel]

On 4 October 2016 at 22:30, Matt Fleming <matt at codeblueprint.co.uk> wrote:
> On Tue, 04 Oct, at 11:34:31AM, Ard Biesheuvel wrote:
>>
>> These relocations are harmless, since the debug ones are only
>> interpreted by the debugger, and the ones generated by
>> EXPORT_SYMBOL(sort) will never be referenced, since the symbols they
>> contain are either renamed to __efistub_xxx (arm64), or they are not
>> part of the kernel proper (arm)
>>
>> So both cases are false positives, but the diagnostic is important,
>> and so breaking the build is appropriate for any other absolute
>> relocation that may appear.
>>
>> The effect of the patch is not that the diagnostic is ignored, but
>> that these relocations are not generated in the first place (-g0) or
>> removed explicitly (ksymtab/krcrctab+sort) rather than via a wildcard.
>> So other than not breaking the build, this patch should have no user
>> observeable differences.
>
> Thanks Ard, sounds reasonable. Feel free to take this through
> whichever tree you think is best.
>
> Reviewed-by: Matt Fleming <matt at codeblueprint.co.uk>

Thanks Matt.

Arnd: could you take this on top of the patch that adds CONFIG_EFI to
multi_v7_defconfig? That would minimize the breakage, I think.