uvm_mapent_alloc
new_entry = uvm_mapent_alloc(map, 0);
new_entry = uvm_mapent_alloc(map, 0);
new_entry = uvm_mapent_alloc(map, (flags & UVM_FLAG_NOWAIT));
new_entry = uvm_mapent_alloc(map,
uvm_mapent_alloc(struct vm_map *, int);
newentry = uvm_mapent_alloc(dstmap, 0);
new_entry = uvm_mapent_alloc(new_map, 0);