uvm_mapent_alloc
new = uvm_mapent_alloc(map, flags);
struct vm_map_entry *uvm_mapent_alloc(struct vm_map*, int);
entry = uvm_mapent_alloc(map, flags);
tmp = uvm_mapent_alloc(map, 0);
tmp = uvm_mapent_alloc(map, 0);
entry = uvm_mapent_alloc(map, flags);
new = uvm_mapent_alloc(map, flags);