Merge remote-tracking branch 'quintela/tags/migration/20140113' into staging

migration.next for 20140113

# gpg: Signature made Mon 13 Jan 2014 09:38:27 AM PST using RSA key ID 5872D723
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* quintela/tags/migration/20140113: (49 commits)
  migration: synchronize memory bitmap 64bits at a time
  ram: split function that synchronizes a range
  memory: syncronize kvm bitmap using bitmaps operations
  memory: move bitmap synchronization to its own function
  kvm: refactor start address calculation
  kvm: use directly cpu_physical_memory_* api for tracking dirty pages
  memory: unfold memory_region_test_and_clear()
  memory: split cpu_physical_memory_* functions to its own include
  memory: cpu_physical_memory_set_dirty_tracking() should return void
  memory: make cpu_physical_memory_reset_dirty() take a length parameter
  memory: s/dirty/clean/ in cpu_physical_memory_is_dirty()
  memory: cpu_physical_memory_clear_dirty_range() now uses bitmap operations
  memory: cpu_physical_memory_set_dirty_range() now uses bitmap operations
  memory: use find_next_bit() to find dirty bits
  memory: s/mask/clear/ cpu_physical_memory_mask_dirty_range
  memory: cpu_physical_memory_get_dirty() is used as returning a bool
  memory: make cpu_physical_memory_get_dirty() the main function
  memory: unfold cpu_physical_memory_set_dirty_flag()
  memory: unfold cpu_physical_memory_set_dirty() in its only user
  memory: unfold cpu_physical_memory_clear_dirty_flag() in its only user
  ...

Message-id: 1389634834[email protected]
Signed-off-by: Anthony Liguori <[email protected]>