kernel compile error, with amd power now k8

[Mart Frauenlob <mart.frauenlob@chello.at>]

Hello,

i get this error when compiling a debian kernel-source:

-------------------------------------------------------
  AR      arch/x86_64/lib/lib.a
  GEN     .version
  CHK     include/linux/compile.h
  UPD     include/linux/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
ld: BFD 2.15 assertion fail ../../bfd/linker.c:619
arch/x86_64/kernel/built-in.o(.init.text+0x767a): In function 
`powernowk8_cpu_init':
: undefined reference to `acpi_processor_register_performance'
arch/x86_64/kernel/built-in.o(.init.text+0x7819): In function 
`powernowk8_cpu_init':
: undefined reference to `acpi_processor_unregister_performance'
arch/x86_64/kernel/built-in.o(.exit.text+0x33): In function 
`powernowk8_cpu_exit':
: undefined reference to `acpi_processor_unregister_performance'
make[1]: *** [.tmp_vmlinux1] Error 1
make[1]: Leaving directory `/usr/src/kernel-source-2.6.8'
make: *** [stamp-build] Error 2
------------------------------------------------------

This only happens if i set AMD PowerNowK8 to be compiled directly into 
the kernel.
LKM compile is not affected.
I tried gcc 3.3 and 3.4.
uname -r
2.6.8-11-amd64-k8

If anybody can reproduce this... a bug in the driver i guess?
Any more info needed?
I dont need PowerNow, but if help is needed i can do some testing.

greets

Mart