[PATCH] ia64: Reduce TLB flushing during process migration

[PATCH] ia64: Reduce TLB flushing during process migration

This patch adds an architecture-specific callout after explicit
processor migrations.  The callout allows architectures (or platforms)
to update TLB specific information (ex., cpu_vm_mask).

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: David Mosberger <davidm@hpl.hp.com>