stable/for-linus-3.5-rc0-tag

 * Extend the APIC ops implementation and add IRQ_WORKER vector support so that 'perf' can work properly.
 * Fix self-ballooning code, and balloon logic when booting as initial domain.
 * Move array printing code to generic debugfs
 * Support XenBus domains.
 * Lazily free grants when a domain is dead/non-existent.
 * In M2P code use batching calls
Bug-fixes:
 * Fix NULL dereference in allocation failure path (hvc_xen)
 * Fix unbinding of IRQ_WORKER vector during vCPU hot-unplug
 * Fix HVM guest resume - we would leak an PIRQ value instead of reusing the existing one.