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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Thorsten Leemhuis <regressions@leemhuis.info>,
	Alexey Kardashevskiy <aik@ozlabs.ru>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"regressions@lists.linux.dev" <regressions@lists.linux.dev>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)
Date: Thu, 10 Mar 2022 11:22:21 +0000	[thread overview]
Message-ID: <1367d2de-bc44-fb96-c1ef-fd4cf0fb82f4@csgroup.eu> (raw)
In-Reply-To: <831731e2-6769-3d36-0cdf-721437452fcc@leemhuis.info>

Hi,

Le 10/03/2022 à 11:39, Thorsten Leemhuis a écrit :
> Hi, this is your Linux kernel regression tracker.
> 
> I noticed a regression report in bugzilla.kernel.org that afaics nobody
> acted upon since it was reported about a week ago, that's why I decided
> to forward it to the lists and a few relevant people to the CC. To quote
> from the ticket:

I already looked at it when the ticket was opened and that's a bit puzzling.

With v5.16.12 and the config file in the bug report I have no such problem:

   CC      arch/powerpc/mm/fault.o
   CC      arch/powerpc/mm/mem.o
   CC      arch/powerpc/mm/pgtable.o
   CC      arch/powerpc/mm/mmap.o
   CC      arch/powerpc/mm/maccess.o
   CC      arch/powerpc/mm/pageattr.o
   CC      arch/powerpc/mm/init_32.o
   CC      arch/powerpc/mm/pgtable_32.o
   CC      arch/powerpc/mm/pgtable-frag.o
   CC      arch/powerpc/mm/ioremap.o
   CC      arch/powerpc/mm/ioremap_32.o
   CC      arch/powerpc/mm/init-common.o
   CC      arch/powerpc/mm/drmem.o
   CC      arch/powerpc/mm/cacheflush.o
   CC      arch/powerpc/mm/book3s32/mmu.o
   CC      arch/powerpc/mm/book3s32/mmu_context.o
   AS      arch/powerpc/mm/book3s32/hash_low.o
   CC      arch/powerpc/mm/book3s32/tlb.o
   CC      arch/powerpc/mm/book3s32/kuep.o
   CC      arch/powerpc/mm/book3s32/kuap.o
   AR      arch/powerpc/mm/book3s32/built-in.a
   CC      arch/powerpc/mm/ptdump/ptdump.o
   CC      arch/powerpc/mm/ptdump/shared.o
   AR      arch/powerpc/mm/ptdump/built-in.a
   CC      arch/powerpc/mm/mmu_context.o
   AR      arch/powerpc/mm/built-in.a


The bug is puzzling because it says the problem is introduced by commit 
d51f86cfd8e3 ("powerpc/mm: Switch obsolete dssall to .long") whereas the 
purpose of that commit is exactly to fix the issue you are reporting.

And as far as I can see that commit is not in v5.16.12, so my feeling is 
that somethings wrong with the bug report.

By the way I think that cherry-picking that commit into v5.16.12 should 
fix it.

Christophe


> 
>> 5.16.12 kernel build for my G4 DP on my Talos II fails with:
>>
>> [...]
>>    CC      arch/powerpc/mm/init_32.o
>>    CC      arch/powerpc/mm/pgtable_32.o
>>    CC      arch/powerpc/mm/pgtable-frag.o
>>    CC      arch/powerpc/mm/ioremap.o
>>    CC      arch/powerpc/mm/ioremap_32.o
>>    CC      arch/powerpc/mm/init-common.o
>>    CC      arch/powerpc/mm/mmu_context.o
>> {standard input}: Assembler messages:
>> {standard input}:30: Error: unrecognized opcode: `dssall'
>> make[2]: *** [scripts/Makefile.build:287: arch/powerpc/mm/mmu_context.o] Fehler 1
>> make[1]: *** [scripts/Makefile.build:549: arch/powerpc/mm] Fehler 2
>> make: *** [Makefile:1846: arch/powerpc] Error 2
>>
>> This seems to have been introduced by commit d51f86cfd8e378d4907958db77da3074f6dce3ba "powerpc/mm: Switch obsolete dssall to .long"
>>
>> Reverting this commit fixes the build for my G4.
> 
> Could somebody take a look into this? Or was this discussed somewhere
> else already? Or even fixed?
> 
> Anyway, to get this tracked:
> 
> #regzbot introduced: d51f86cfd8e378d4907958db77da3074f6dce3ba
> #regzbot from: Erhard F <erhard_f@mailbox.org>
> #regzbot title:  arch/powerpc/mm/mmu_context.o Assembler messages:
> Error: unrecognized opcode: `dssall' (PowerMac G4)
> #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215658
> 
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> 
> P.S.: As the Linux kernel's regression tracker I'm getting a lot of
> reports on my table. I can only look briefly into most of them and lack
> knowledge about most of the areas they concern. I thus unfortunately
> will sometimes get things wrong or miss something important. I hope
> that's not the case here; if you think it is, don't hesitate to tell me
> in a public reply, it's in everyone's interest to set the public record
> straight.
> 

  reply	other threads:[~2022-03-10 11:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-10 10:39 Bug 215658 - arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4) Thorsten Leemhuis
2022-03-10 11:22 ` Christophe Leroy [this message]
2022-03-10 12:22   ` Thorsten Leemhuis
2022-03-10 18:15     ` Thorsten Leemhuis

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