devfs_resolve_or_create_path
struct devfs_node *devfs_resolve_or_create_path(
parent = devfs_resolve_or_create_path(parent, create_path, 1);
parent = devfs_resolve_or_create_path(root, path, 1);
parent = devfs_resolve_or_create_path(parent, create_path, 1);
parent = devfs_resolve_or_create_path(root, create_path, 0);
parent = devfs_resolve_or_create_path(parent, path, 0);