DEV_CLOSE
DEV_CLOSE(f->f_dev)(f);
derr = DEV_CLOSE(f->f_dev)(f);
DEV_CLOSE(f->f_dev)(f);
err2 = DEV_CLOSE(f->f_dev)(f);
if (DEV_CLOSE(f->f_dev) != NULL)
(void)DEV_CLOSE(f->f_dev)(f);
int (DEV_CLOSE(unused))(struct open_file *);