The new Power7 processor has 4 way SMT.  This 4 way SMT benefits from
dynamic power updates that arch_scale_smt_power was designed to provide.
The first patch fixes a generic scheduler bug necessary for arch_scale_smt
to properly function.  The second patch implements arch_scale_smt_power 
for powerpc, and in particular for Power7 processors.

Version 2 changes:
- Drop Patch 1 from the original series since it's in the -tip tree now
- Move enabling the cpu feature into it's own patch (now patch 1)
- Add stubbing out broken x86 implementation to patch 1
- clean up coding style in patch 2

Version 3 changes:
- Added a comment to Patch 2

---
Joel Schopp (2):
powerpc: implement arch_scale_smt_power for Power7
sched: enable ARCH_POWER

 arch/powerpc/include/asm/cputable.h |    3 +
 arch/powerpc/kernel/smp.c           |   56
++++++++++++++++++++++++++++++++++++
 arch/x86/kernel/cpu/sched.c         |    6 +--
 kernel/sched_features.h             |    2 -
 4 files changed, 61 insertions(+), 6 deletions(-)