[src/trunk]: src/sys/net Don't take KERNEL_LOCK in looutput if NET_MPSAFE

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4638834c740a
branches:  trunk
changeset: 827854:4638834c740a
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Wed Nov 15 04:08:02 2017 +0000

description:
Don't take KERNEL_LOCK in looutput if NET_MPSAFE

We can perhaps get rid of KERNEL_LOCK from looutput, but for now
keep it for safe.

diffstat:

 sys/net/if_loop.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (38 lines):

diff -r a4731a91adab -r 4638834c740a sys/net/if_loop.c
--- a/sys/net/if_loop.c Wed Nov 15 02:13:33 2017 +0000
+++ b/sys/net/if_loop.c Wed Nov 15 04:08:02 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_loop.c,v 1.96 2017/10/23 09:32:00 msaitoh Exp $     */
+/*     $NetBSD: if_loop.c,v 1.97 2017/11/15 04:08:02 ozaki-r Exp $     */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -65,7 +65,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_loop.c,v 1.96 2017/10/23 09:32:00 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_loop.c,v 1.97 2017/11/15 04:08:02 ozaki-r Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -247,7 +247,9 @@
 
        MCLAIM(m, ifp->if_mowner);
 
+#ifndef NET_MPSAFE
        KERNEL_LOCK(1, NULL);
+#endif
 
        if ((m->m_flags & M_PKTHDR) == 0)
                panic("looutput: no header mbuf");
@@ -373,7 +375,9 @@
        schednetisr(isr);
        splx(s);
 out:
+#ifndef NET_MPSAFE
        KERNEL_UNLOCK_ONE(NULL);
+#endif
        return error;
 }