[Regression in 7.0] OLPC-XO-1.5 will not boot after commit 157266edcc

[An]

[please keep me in CC, I'm not subscribed]

Hi Ingo,

my OLPC XO-1.5 stopped booting when switching from 6.19 to 7.0

I bisected this to

commit 157266edcc56715323de1bd60e49194b3b66a174
Author: Ingo Molnar <mingo@xxxxxxxxxx>
Date:   Thu May 15 14:05:41 2025 +0200

    x86/boot/e820: Simplify append_e820_table() and remove restriction 
on single-entry tables

The XO boots from a forth environment and is rather quirky.
If I can help with any logs or tests, please let me know.

I'm compiling a 7.0 kernel with the patch reverted,
but it smells like a plain revert isn't the best idea.

Thank you,
An Müller