Hi,

I can now confirm that the boot failure is due to the absence of commit 8183d99f4a22 ("powerpc/lib/feature-fixups: use raw_patch_instruction()")

Greg, could you please apply that patch to 4.14 stable ?

Thanks Christophe

Le 17/10/2018 à 18:36, Christophe LEROY a écrit :

Hi,

Yes I discovered the same issue today on MPC8321E, I plan to look at it more closely tomorrow morning (Paris Time).

I think we are missing commit 8183d99f4a22c2abbc543847a588df3666ef0c0c , I didn't realise it when we applied the serie to 4.14, patch_instruction() is called too early without that patch.

If you have opportunity to test now, you are welcome, otherwise I'll test it tomorrow.

Christophe

Le 17/10/2018 à 17:18, David Gounaris a écrit :

...

Hello, I got into troubles when I upgraded to Linux kernel 4.14.76 on boards with MPC8321.

The symptom that I see is that the boot process gets cyclic, and no printouts are seen from the Linux kernel. It seems like it resets.

When I revert the following commits it works again.

af1a8101794dfea897290e057f61086dabfe6c91, powerpc/lib: fix book3s/32 boot failure due to code patching 609fbeddb24c4035d24fc32d82dc08b30ae3dfc0, powerpc: Avoid code patching freed init sections

Any ideas of how to continue?

BR / David Gounaris