In

http://svnweb.freebsd.org/changeset/base/258221
I introduced a bug which initialized global locks
whenever the SCTP stack initialized. This was fixed in
http://svnweb.freebsd.org/changeset/base/258574
by rodrigc@. He just initialized the locks for
the default vnet. This fix reverts to the old
behaviour before r258221, which explicitly makes
sure it is only called once, because this works also on
other platforms.
MFC after: 3 days
X-MFC with: r258574.

sys/netinet/sctp_bsd_addr.c

@@ -100,6 +100,9 @@ sctp_startup_iterator(void)
 		/* You only get one */
 		return;
 	}
+	/* Initialize global locks here, thus only once. */
+	SCTP_ITERATOR_LOCK_INIT();
+	SCTP_IPI_ITERATOR_WQ_INIT();
 	TAILQ_INIT(&sctp_it_ctl.iteratorhead);
 	kproc_create(sctp_iterator_thread,
 	    (void *)NULL,

sys/netinet/sctp_pcb.c

@@ -5864,14 +5864,6 @@ sctp_pcb_init()
 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 		LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
 	}
-	/*
-	 * Only initialize non-VNET global mutexes for the
-	 * default instance.
-	 */
-	if (IS_DEFAULT_VNET(curvnet)) {
-		SCTP_ITERATOR_LOCK_INIT();
-		SCTP_IPI_ITERATOR_WQ_INIT();
-	}
 	sctp_startup_iterator();
 
 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)