Bug 215658

Summary: arch/powerpc/mm/mmu_context.o Assembler messages: Error: unrecognized opcode: `dssall' (PowerMac G4)
Product: Platform Specific/Hardware Reporter: Erhard F. (erhard_f)
Component: PPC-32Assignee: platform_ppc-32
Severity: normal CC: aik, christophe.leroy
Priority: P1    
Hardware: PPC-32   
OS: Linux   
Kernel Version: 5.16.12 Tree: Mainline
Regression: Yes
Attachments: kernel .config (5.16.12, PowerMac G4 DP)

Description Erhard F. 2022-03-04 08:07:56 UTC
Created attachment 300528 [details]
kernel .config (5.16.12, PowerMac G4 DP)

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.
Comment 1 Christophe Leroy 2022-03-10 11:23:47 UTC
This description is puzzling.

Commit d51f86cfd8e3 ("powerpc/mm: Switch obsolete dssall to .long") is not in v5.16.12

For me, applying that commit to v5.16.12 should fix your problem, not the reverse.
Comment 2 Erhard F. 2022-03-10 13:25:32 UTC
This was Gentoo Sources v5.16.12 not upstream sources. But now I am not able to reproduce it which is even more strange... Also Gentoos' v5.16.13 builds ok.

What I did in the meantime was downgrading to binutils 2.37 (had 2.38 before) and rebuilding the toolchain afterwards.

So this probably was never a bug but an issue with my setup. ;) Closing here.