- write_lock(&vmlist_lock);
- area = __find_vm_area(ret);
- area->flags |= VM_USERMAP;
- write_unlock(&vmlist_lock);
-
+ if (ret) {
+ write_lock(&vmlist_lock);
+ area = __find_vm_area(ret);
+ area->flags |= VM_USERMAP;
+ write_unlock(&vmlist_lock);
+ }