This patch is in regard to bugme.osdl.org bug 619, link here:

http://bugme.osdl.org/show_bug.cgi?id=619

This is the second of two patches to fix this bug.  This patch fills in 
include/linux/topology.h (created in the last patch) with a couple 
#defines.  The patch also creates a generic_hweight64() in 
include/linux/bitops.h, which we've been lacking for a while.  It then 
uses these new macros in sched.c to ensure that if a node has no CPUs, 
it is not used in scheduling decisions.

[mcd@arrakis src]$ diffstat ~/patches/node_online.patch
  include/linux/bitops.h   |   27 +++++++++++++++++++++++++++
  include/linux/topology.h |    7 +++++++
  kernel/sched.c           |    2 +-
  3 files changed, 35 insertions(+), 1 deletion(-)

Cheers!

-Matt