K 10
svn:author
V 7
attilio
K 8
svn:date
V 27
2011-10-03T14:23:00.436183Z
K 7
svn:log
V 466
Add some improvements in the idle table callbacks:
- Replace instances of manual assembly instruction "hlt" call
  with halt() function calling.
- In cpu_idle_mwait() avoid races in check to sched_runnable() using
  the same pattern used in cpu_idle_hlt() with the 'hlt' instruction.
- Add comments explaining the logic behind the pattern used in
  cpu_idle_hlt() and other idle callbacks.

In collabouration with:	jhb, mav
Reviewed by:	adri, kib
MFC after:	3 weeks

END