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[Xen-devel] [PATCH 0 of 9] (v2) arm: SMP boot

This patch series implements SMP boot for arch/arm, as far as getting
all CPUs up and running the idle loop.

Changes from v1:
 - moved barriers out of loop in udelay()
 - dropped broken GIC change in favour of explanatory comment
 - made the increment of ready_cpus atomic (I couldn't move the 
   increment to before signalling the next CPU because the PT
   switch has to happen between them)
 - Made secondary CPUs come up directly on the idle vcpus' stacks,
   avoiding the whole business of allocating and tracking boot stacks.
 - Added a new patch to do late-boot MMU fixups on secondary CPUs. 



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