uvm_unmap1
uvm_unmap1(map, addr, addr + size, UVM_FLAG_VAONLY);
uvm_unmap1(map, vm_map_min(map), vm_map_max(map), flags);
void uvm_unmap1(struct vm_map *, vaddr_t, vaddr_t, int);
#define uvm_unmap(map, s, e) uvm_unmap1((map), (s), (e), 0)