[src/trunk]: src/sys/netinet Use IFQ_LOCK instead of splnet for if_snd

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

details:   https://anonhg.NetBSD.org/src/rev/85b6b8edb5fe
branches:  trunk
changeset: 821681:85b6b8edb5fe
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Mon Feb 13 04:06:39 2017 +0000

description:
Use IFQ_LOCK instead of splnet for if_snd

diffstat:

 sys/netinet/ip_output.c |  9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diffs (43 lines):

diff -r 2f45a0c97dd0 -r 85b6b8edb5fe sys/netinet/ip_output.c
--- a/sys/netinet/ip_output.c   Mon Feb 13 04:05:58 2017 +0000
+++ b/sys/netinet/ip_output.c   Mon Feb 13 04:06:39 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ip_output.c,v 1.269 2017/01/16 15:14:16 christos Exp $ */
+/*     $NetBSD: ip_output.c,v 1.270 2017/02/13 04:06:39 ozaki-r Exp $  */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -91,7 +91,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip_output.c,v 1.269 2017/01/16 15:14:16 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip_output.c,v 1.270 2017/02/13 04:06:39 ozaki-r Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -794,7 +794,6 @@
        struct mbuf **mnext;
        int sw_csum = m->m_pkthdr.csum_flags;
        int fragments = 0;
-       int s;
        int error = 0;
 
        ip = mtod(m, struct ip *);
@@ -901,14 +900,14 @@
         * any of them.
         */
        if (ifp != NULL) {
-               s = splnet();
+               IFQ_LOCK(&ifp->if_snd);
                if (ifp->if_snd.ifq_maxlen - ifp->if_snd.ifq_len < fragments &&
                    error == 0) {
                        error = ENOBUFS;
                        IP_STATINC(IP_STAT_ODROPPED);
                        IFQ_INC_DROPS(&ifp->if_snd);
                }
-               splx(s);
+               IFQ_UNLOCK(&ifp->if_snd);
        }
        if (error) {
                for (m = m0; m; m = m0) {