If we want to dedup anon shared memory we need to call page_in_parent.
So we need to make it extern.
Also in case of anon shared mem we have only 1 bit per page so we have to
change page_in_parent signature.
Signed-off-by: Fyodor Bocharov <fbocharov@yandex.ru>
Signed-off-by: Eugene Batalov <eabatalov89@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>