[src/trunk]: src/sys/net Use atomic operations for ifa_refcnt

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

details:   https://anonhg.NetBSD.org/src/rev/ca5d0ad147d5
branches:  trunk
changeset: 836662:ca5d0ad147d5
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Tue Oct 30 05:29:21 2018 +0000

description:
Use atomic operations for ifa_refcnt

diffstat:

 sys/net/if.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (36 lines):

diff -r 5148533a552d -r ca5d0ad147d5 sys/net/if.c
--- a/sys/net/if.c      Tue Oct 30 05:27:51 2018 +0000
+++ b/sys/net/if.c      Tue Oct 30 05:29:21 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if.c,v 1.438 2018/10/30 05:27:51 ozaki-r Exp $ */
+/*     $NetBSD: if.c,v 1.439 2018/10/30 05:29:21 ozaki-r Exp $ */
 
 /*-
  * Copyright (c) 1999, 2000, 2001, 2008 The NetBSD Foundation, Inc.
@@ -90,7 +90,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.438 2018/10/30 05:27:51 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.439 2018/10/30 05:29:21 ozaki-r Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_inet.h"
@@ -1784,7 +1784,7 @@
 ifaref(struct ifaddr *ifa)
 {
 
-       ifa->ifa_refcnt++;
+       atomic_inc_uint(&ifa->ifa_refcnt);
 }
 
 void
@@ -1793,7 +1793,7 @@
        KASSERT(ifa != NULL);
        KASSERT(ifa->ifa_refcnt > 0);
 
-       if (--ifa->ifa_refcnt == 0) {
+       if (atomic_dec_uint_nv(&ifa->ifa_refcnt) == 0) {
                free(ifa, M_IFADDR);
        }
 }