Goto error recovery

int __init my_init_function(void)
{
    int err;

    /* registration takes a pointer and a name */
    err = register_this(ptr1, "skull");
    if (err) goto fail_this;
    err = register_that(ptr2, "skull");
    if (err) goto fail_that;
    err = register_those(ptr3, "skull");
    if (err) goto fail_those;

    return 0; /* success */

    fail_those: unregister_that(ptr2, "skull");
    fail_that: unregister_this(ptr1, "skull");
    fail_this: return err; /* propagate the error */
}