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Subject: Re: [01/24] powerpc/mm: Move exception_enter/exit to a do_page_fault
 wrapper
To: Michael Ellerman <patch-notifications@ellerman.id.au>,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>
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From: Christophe LEROY <christophe.leroy@c-s.fr>
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Date: Mon, 7 Aug 2017 18:37:23 +0200
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Le 07/08/2017 à 12:41, Michael Ellerman a écrit :
> On Wed, 2017-07-19 at 04:49:23 UTC, Benjamin Herrenschmidt wrote:
>> This will allow simplifying the returns from do_page_fault
>>
>> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> 
> Series applied to powerpc next, thanks.
> 
> https://git.kernel.org/powerpc/c/7afad422ac61067473d5f3d20bbd54
> 


Boot failure on the 8xx:

[    6.029556] Failed to execute /init (error -14)
[    6.034623] Starting init: /bin/sh exists but couldn't execute it 
(error -14)
[    6.041489] Kernel panic - not syncing: No working init found.  Try 
passing init= option to kernel. See Linux 
Documentation/admin-guide/init.rst for guidance.
[    6.055518] CPU: 0 PID: 1 Comm: init Not tainted 
4.13.0-rc3-s3k-dev-00143-g7aa62e972a56 #56
[    6.063745] Call Trace:
[    6.066224] [c60f1ed0] [c001a624] panic+0x108/0x250 (unreliable)
[    6.072140] [c60f1f30] [c0002640] rootfs_mount+0x0/0x58
[    6.077311] [c60f1f40] [c000cb80] ret_from_kernel_thread+0x5c/0x64
[    6.083405] Rebooting in 180 seconds..


Bisected to c433ec0455f921eaf8dd0262a718ce6f8ad62ea2 ("powerpc/mm: 
Pre-filter SRR1 bits before do_page_fault()")


Will see tomorrow what's wrong with that.

Christophe