Re: [PATCH v4] x86, boot: Make data from decompress_kernel stage live longer

[Yinghai Lu]

On Mon, Mar 16, 2015 at 12:45 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
> * Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
>
>> After commit f47233c2d34f ("x86/mm/ASLR: Propagate base load address
>> calculation"), get warning about setup_data from debugfs for
>> setup_data. Boris found setup_data for kaslr from boot stage become
>> all 0's in kernel stage.
>
> And? What is the high level effect to the user?
>
> 'setup_data for kaslr from boot stage becomes all 0's' is not a high
> level effect. It's a detail of the mechanism of the bug, not a high
> level effect.
>
> Think of a regular Linux user reading your changelogs. The first
> paragraph of bug fixes should be readable to them!

That should be ioremap warning that reported by
http://marc.info/?l=linux-kernel&m=142492905425130&w=2

and later Boris found those all 0's.

Thanks

Yinghai
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