problems with lttng for powerpc and kernel 2.6.21

Hi all, 
I patched the linux-2.6.21 kernel tree with the
patch-2.6.21-lttng-0.9.5.tar.bz2 patch. This works without problems.
Then I try to make a kernel config for the MPC8272ADS board (ppc). This
causes trouble I get the following warnings: 
ltt/Kconfig:245:warning: 'select' used by config symbol
'LTT_PROBE_LOCKING' refer to undefined symbol 'TRACE_IRQFLAGS_SUPPORT'
ltt/Kconfig:246:warning: 'select' used by config symbol
'LTT_PROBE_LOCKING' refer to undefined symbol 'STACKTRACE_SUPPORT'
ltt/Kconfig:247:warning: 'select' used by config symbol
'LTT_PROBE_LOCKING' refer to undefined symbol 'LOCKDEP_SUPPORT'
ltt/Kconfig:271:warning: 'select' used by config symbol
'LTT_PROCESS_STACK' refer to undefined symbol 'UNWIND_INFO'
ltt/Kconfig:272:warning: 'select' used by config symbol
'LTT_PROCESS_STACK' refer to undefined symbol 'STACK_UNWIND'

And the ltt can not be found in the "Instrumentation Support" section of
menuconfig. Some stuff seems not to be ported to powerpc in this tree.
Can anybody give me a hint how to go further?
Is there another kernel tree which is better supported for PPC? 
Is there a already patched kernel tree available to test lttng?

I am new on this topic and try to get a good starting point. 

Many thanks in advance 
Holger