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Bug#885245: linux: FTBFS on powerpcspe: sstep.c: ptesync unrecognized



Control: severity -1 normal

On Mon, 2017-12-25 at 22:32 -0500, Aaron M. Ucko wrote:
> Source: linux
> Version: 4.14.7-1
> Severity: important
> Tags: upstream
> Justification: fails to build from source (but built successfully in the past)
> User: debian-powerpc@lists.debian.org
> Usertags: powerpcspe
> 
> Builds of linux for powerpcspe (admittedly not a release architecture)
> have been failing lately:
> 
>   {standard input}: Assembler messages:
>   {standard input}:5854: Error: unrecognized opcode: `ptesync'
>   /<<PKGBUILDDIR>>/scripts/Makefile.build:319: recipe for target 'arch/powerpc/lib/sstep.o' failed
>   make[6]: *** [arch/powerpc/lib/sstep.o] Error 1
> 
> Could you please take a look?

I would welcome a powerpcspe porter to join the kernel team, but until
that happens you should not expect any fixes from our side.  (If you
had a porterbox available, this might be a more reasonable request.)

The breaking commit appears to be:

commit 3cdfcbfd32b9d1c0d4a6fa80ee9c390927aab948
Author: Paul Mackerras <paulus@ozlabs.org>
Date:   Wed Aug 30 14:12:25 2017 +1000

    powerpc: Change analyse_instr so it doesn't modify *regs

The other reference to ptesync in this file is guarded by
"#ifdef __powerpc64__", so most likely that's needed around the new
use.  But I don't know whether a fix is as simple as that.

The upstream address to contact is linuxppc-dev@lists.ozlabs.org.

Ben.

-- 
Ben Hutchings
The world is coming to an end.	Please log off.

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