Merge remote-tracking branch 'bonzini/iommu-for-anthony' into staging

# By Paolo Bonzini (2) and others
# Via Paolo Bonzini
* bonzini/iommu-for-anthony:
  exec: fix incorrect assumptions in memory_access_size
  memory: Return -1 again on reads from unsigned regions
  memory: actually set the owner
  exec.c: Pass correct pointer type to qemu_ram_ptr_length

Message-id: 1374264478-23913-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>