Now that access to the page's "act_count" field is synchronized by the page lock instead of the object lock, there is no reason for vm_page_activate() to assert that the object is locked for either read or write access. (The "VPO_UNMANAGED" flag never changes after page allocation.)
Now that access to the page's "act_count" field is synchronized by the page
lock instead of the object lock, there is no reason for vm_page_activate()
to assert that the object is locked for either read or write access.
(The "VPO_UNMANAGED" flag never changes after page allocation.)

Sponsored by:	EMC / Isilon Storage Division

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