vm_page_grab_unlocked
m = vm_page_grab_unlocked(sc->s_swap.object, i,
ma[i] = vm_page_grab_unlocked(object, ma[i]->pindex,
ma[i] = vm_page_grab_unlocked(obj, atop(off),
vm_page_t vm_page_grab_unlocked(vm_object_t, vm_pindex_t, int);