diff options
| author | David Gwynne <dlg@cvs.openbsd.org> | 2021-07-09 01:22:06 +0000 |
|---|---|---|
| committer | David Gwynne <dlg@cvs.openbsd.org> | 2021-07-09 01:22:06 +0000 |
| commit | f5ad72e36ef9b3578db456cad0b1aeb5edd63fe3 (patch) | |
| tree | 2ad931b35db14f276156b80c51f4e13ed2069a43 /sys/net | |
| parent | 8f03d357d0d9a7b038fbd4dffba99fb011e06174 (diff) | |
ifq_hdatalen can return 0 if ifq_empty is true, which avoids locks.
Diffstat (limited to 'sys/net')
| -rw-r--r-- | sys/net/ifq.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/net/ifq.c b/sys/net/ifq.c index 51eaaf44343..d61e5934624 100644 --- a/sys/net/ifq.c +++ b/sys/net/ifq.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ifq.c,v 1.43 2021/02/20 04:37:26 dlg Exp $ */ +/* $OpenBSD: ifq.c,v 1.44 2021/07/09 01:22:05 dlg Exp $ */ /* * Copyright (c) 2015 David Gwynne <dlg@openbsd.org> @@ -500,6 +500,9 @@ ifq_hdatalen(struct ifqueue *ifq) struct mbuf *m; int len = 0; + if (ifq_empty(ifq)) + return (0); + m = ifq_deq_begin(ifq); if (m != NULL) { len = m->m_pkthdr.len; |