In light of some proposed changes in the sched_domains code, I coded up
this little ditty that simply creates and populates a cpu_sibling_map for
PPC64 machines.  The patch just checks the CPU flags to determine if the
CPU supports SMT (aka Hyper-Threading aka Multi-Threading aka ...) and
fills in a mask of the siblings for each CPU in the system.  This should
allow us to build sched_domains for PPC64 with generic code in
kernel/sched.c for the SMT systems.  SMT is becoming more popular and is
turning up in more and more architectures.  I don't think it will be too
long until this feature is supported by most arches...
Signed-off-by: Matthew Dobson <colpatch@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>