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Date:   Sat, 23 May 2020 19:30:20 +0200
From:   Christophe Leroy <>
To:     Larry Finger <>
Cc:     Benjamin Herrenschmidt <>,
        Michael Ellerman <>,
        Paul Mackerras <>,
        ppc-dev <>,
        LKML <>
Subject: Re: Kernel bug in 5.7 for PPC32 on PowerBook G4 - bisected to commit

Hi Larry,

Le 23/05/2020 à 19:24, Larry Finger a écrit :
> Hi Christophe,
> Although kernel 5.7.0-rc2 appeared to boot cleanly, it failed on my G4 
> when I tried to generate a new kernel. The following BUG message is logged:


> This problem was bisected to commit 697ece7 ("powerpc/32s: reorder Linux 
> PTE bits to better match Hash PTE bits").

Being reversed in new -rc , see

> If I had done more rigorous tests earlier, I would have found the bug 
> with more time to fix it before release of 5.7, but every other problem 
> I have found happened at boot, not when the machine had to swap.
> Thanks,
> Larry


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