On Sun, 2012-01-01 at 23:27 +0000, Ben Hutchings wrote:
> On Sun, 2012-01-01 at 21:16 +0000, Thorsten Glaser wrote:
[...]
> > • work and fail
> >
> > This is for debian-68k, linux-68k and debian-kernel:
> >
> > ARAnyM “console” output of a working (3.0) and failing (3.2) boot,
> > for your debugging pleasure. I can run arbitrary tests against the
> > failing kernel, as long as they’re limited to [LILO].Args or make
> > it boot ;-)
>
> This is presumably triggered by enabling CPU topology information in
> sysfs on UP systems. This is a Debian patch for 3.2
> (features/all/topology-Provide-CPU-topology-in-sysfs-in-SMP-configura.patch) but has been accepted upstream for 3.3.
>
> My guess is that on m68k get_cpu_sysdev(0) returns NULL and thus
> topology_add_dev() passes an invalid pointer into sysfs_create_group().
> So either m68k (and maybe some other architectures with no SMP support)
> need to be fixed or the CPU topology code needs to allow for this.
None of these architectures appears to call register_cpu():
c6x frv h8300 m68k microblaze openrisc score um xtensa
and therefore they will all panic at boot following this change (commit
ccbc60d3e19a1b6ae66ca0d89b3da02dde62088b). So either I can try to fix
them or else it must be reverted for now.
Ben.
--
Ben Hutchings
Humour is the best antidote to reality.
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