static void __exit
exit_alq(void)
{
if (ald_proc != -1)
kill_proc(ald_proc, SIGKILL, -1);
ald_shutdown(NULL, 0);
printk(KERN_INFO "%s: driver unloaded\n", mod_info);
}
static int
alq_load_handler(module_t mod, int what, void *arg)
{
int ret;
ret = 0;
switch (what) {
case MOD_LOAD:
case MOD_SHUTDOWN:
break;
case MOD_QUIESCE:
ALD_LOCK();
/* Only allow unload if there are no open queues. */
if (BSD_LIST_FIRST(&ald_queues) == NULL) {
ald_shutingdown = 1;
ALD_UNLOCK();
EVENTHANDLER_DEREGISTER(shutdown_pre_sync,
alq_eventhandler_tag);
ald_shutdown(NULL, 0);
mtx_destroy(&ald_mtx);
} else {
ALD_UNLOCK();
ret = EBUSY;
}
break;
case MOD_UNLOAD:
/* If MOD_QUIESCE failed we must fail here too. */
if (ald_shutingdown == 0)
ret = EBUSY;
break;
default:
ret = EINVAL;
break;
}
return (ret);
}
