deprecate ifiq_barrier.

drivers don't need to call it because the stack runs work in ifiqs.
again, only the stack has to care about waiting for pending work
when shutting down, not drivers. ifiq_destroy already does a task_del
and task_barrier dance, so we don't need ifiq_barrier.

2 files changed, 2 insertions, 10 deletions

diff --git a/sys/net/ifq.c b/sys/net/ifq.c
index a43716563e5..9e17c229eb1 100644
--- a/sys/net/ifq.c
+++ b/sys/net/ifq.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ifq.c,v 1.28 2019/03/04 21:57:16 dlg Exp $ */
+/*	$OpenBSD: ifq.c,v 1.29 2019/03/29 04:12:55 dlg Exp $ */
 
 /*
  * Copyright (c) 2015 David Gwynne <dlg@openbsd.org>
@@ -545,13 +545,6 @@ ifiq_add_data(struct ifiqueue *ifiq, struct if_data *data)
 	mtx_leave(&ifiq->ifiq_mtx);
 }
 
-void
-ifiq_barrier(struct ifiqueue *ifiq)
-{
-	if (!task_del(ifiq->ifiq_softnet, &ifiq->ifiq_task))
-		taskq_barrier(ifiq->ifiq_softnet);
-}
-
 int
 ifiq_enqueue(struct ifiqueue *ifiq, struct mbuf *m)
 {
diff --git a/sys/net/ifq.h b/sys/net/ifq.h
index fdbfc170314..664a483950e 100644
--- a/sys/net/ifq.h
+++ b/sys/net/ifq.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ifq.h,v 1.23 2019/03/01 04:47:33 dlg Exp $ */
+/*	$OpenBSD: ifq.h,v 1.24 2019/03/29 04:12:55 dlg Exp $ */
 
 /*
  * Copyright (c) 2015 David Gwynne <dlg@openbsd.org>
@@ -477,7 +477,6 @@ void		 ifiq_destroy(struct ifiqueue *);
 int		 ifiq_input(struct ifiqueue *, struct mbuf_list *);
 int		 ifiq_enqueue(struct ifiqueue *, struct mbuf *);
 void		 ifiq_add_data(struct ifiqueue *, struct if_data *);
-void		 ifiq_barrier(struct ifiqueue *);
 
 #define	ifiq_len(_ifiq)			ml_len(&(_ifiq)->ifiq_ml)
 #define	ifiq_empty(_ifiq)		ml_empty(&(_ifiq)->ifiq_ml)