bug#25231: Linux-libre 4.9 fails to load modules on i686 (release blocker!)

[Ludovic Courtès]

Hello!

Linux-libre 4.9.0 triggers this problem on i686 (quoting
<https://hydra.gnu.org/build/1713833/nixlog/21/raw>):

--8<---------------cut here---------------start------------->8---
loading kernel modules...
[    6.085552] libahci: disagrees about version of symbol mcount
[    6.085978] libahci: Unknown symbol mcount (err -22)
./gnu/build/linux-modules.scm:195:6: In procedure load-linux-module*:
./gnu/build/linux-modules.scm:195:6: In procedure load-linux-module: Invalid 
argument
--8<---------------cut here---------------end--------------->8---

With 4.8.14, things went well:
<https://hydra.gnu.org/build/1689159/log/raw>.

To reproduce, run, for instance:

  ./pre-inst-env guix system vm gnu/system/install.scm -s i686-linux

<https://patchwork.kernel.org/patch/9380911/> suggests this might be a
4.9 bug.

Mark, any ideas?  Did anyone get 4.9 running on i686?

If not, I suggest reverting the 4.8.14 → 4.9 upgrade for the release.

Ludo’.