Function config_intrhook_establish

freebsd/kern/subr_autoconf.c:183–211

* Register a hook that will be called after "cold" * autoconfiguration is complete and interrupts can * be used to complete initialization. */

 * be used to complete initialization.
 */
int
config_intrhook_establish(struct intr_config_hook *hook)
{
	struct intr_config_hook *hook_entry;

	TSHOLD("config hooks");
	mtx_lock(&intr_config_hook_lock);
	TAILQ_FOREACH(hook_entry, &intr_config_hook_list, ich_links)
		if (hook_entry == hook)
			break;
	if (hook_entry != NULL) {
		mtx_unlock(&intr_config_hook_lock);
		printf("config_intrhook_establish: establishing an "
		       "already established hook.\n");
		return (1);
	}
	TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
	if (next_to_notify == NULL)
		next_to_notify = hook;
	mtx_unlock(&intr_config_hook_lock);
	if (cold == 0)
		/*
		 * XXX Call from a task since not all drivers expect
		 *     to be re-entered at the time a hook is established.
		 */
		/* XXX Sufficient for modules loaded after initial config??? */
		run_interrupt_driven_config_hooks();	
	return (0);
}

/*
 * Register a hook function that is automatically unregistered after it runs.