bitkeeper revision 1.1725 (42b7e4fcombAuDB0AR2i8hfnOEMfOQ)

bitkeeper revision 1.1725 (42b7e4fcombAuDB0AR2i8hfnOEMfOQ)

sched.h, xen.h, schedule.c, dom0_ops.c, hypercall.h, smpboot.c, process.c:
  Extend the CONFIG_HOTPLUG_CPU behavior down into the hypervisor.
  Adds two SCHEDOPS (vcpu_down/vcpu_up) which set/clear VCPU flag VCPU_down.
  The domain_runnable() check now looks at this flag and subsequently the
  vcpu is not scheduled when VCPU_down is set.
Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>