Recent x86-64 sibling map fix for clustered mode by James
(http://linux.bkbits.net:8080/linux-2.6/cset@414b34a6jkiHQ5AnhA269av76y3ZAw?nav=index.html)
is not the recommended way of fixing it.

That patch assumes BIOS for non-clustered systems accept the HW assigned
value.  Why make this assumption when we can fix it in a better
fashion(which is also used by x86 kernel's today)

Basically use HW assigned apic_id's(returned by cpuid) for non clustered
systems and for clustered use BIOS provided apic_id's.  Appended patch does
this.

Note: Similar issue was earlier disussed in context of x86 approx an year
back and James then backed out his changes.
http://www.ussg.iu.edu/hypermail/linux/kernel/0312.2/0167.htmlSigned-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>