Do not seroize a struct needed for RTM_RESOLVE in the hot path.

ok phessler@, bluhm@, tedu@, natano@

diff --git a/sys/net/route.c b/sys/net/route.c
index c170dda..1758bb3 100644 (file)
--- a/sys/net/route.c
+++ b/sys/net/route.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: route.c,v 1.314 2016/08/16 09:01:14 mpi Exp $ */
+/*     $OpenBSD: route.c,v 1.315 2016/08/19 07:12:54 mpi Exp $ */
 /*     $NetBSD: route.c,v 1.14 1996/02/13 22:00:46 christos Exp $      */
 
 /*
@@ -236,17 +236,19 @@ struct rtentry *
 rt_match(struct sockaddr *dst, uint32_t *src, int flags, unsigned int tableid)
 {
        struct rtentry          *rt0, *rt = NULL;
-       struct rt_addrinfo       info;
        int                      s, error = 0;
 
-       bzero(&info, sizeof(info));
-       info.rti_info[RTAX_DST] = dst;
-
        s = splsoftnet();
        rt = rtable_match(tableid, dst, src);
        if (rt != NULL) {
                if ((rt->rt_flags & RTF_CLONING) && ISSET(flags, RT_RESOLVE)) {
+                       struct rt_addrinfo       info;
+
                        rt0 = rt;
+
+                       memset(&info, 0, sizeof(info));
+                       info.rti_info[RTAX_DST] = dst;
+
                        KERNEL_LOCK();
                        error = rtrequest(RTM_RESOLVE, &info, RTP_DEFAULT,
                            &rt, tableid);