Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Fixes and improvements for perf/core:

. Overhaul the tools/ makefiles, gluing them to the top level Makefile, from
  Borislav Petkov.

. Move the UI files from tools/perf/util/ui/ to tools/perf/ui/. Also move
  the GTK+ browser to tools/perf/ui/gtk/, from Namhyung Kim.

. Only fallback to sw cycles counter on ENOENT for the hw cycles, from
  Robert Richter

. Trivial fixes from Robert Richter

. Handle the autogenerated bison/flex files better, from Namhyung and Jiri Olsa.

. Navigate jump instructions in the annotate browser, just press enter or ->,
  still needs support for a jump navigation history, i.e. to go back.

. Search string in the annotate browser: same keys as vim:
     / forward
     n next backward/forward
     ? backward

. Clarify number of events/samples in the report header, from Ashay Rane

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 22 insertions, 8 deletions

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index c964958ac47..3dcdb81ec3e 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1223,11 +1223,17 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 
 	rt = rt6_get_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev);
 
-	if (rt)
-		neigh = dst_get_neighbour_noref(&rt->dst);
-
+	if (rt) {
+		neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);
+		if (!neigh) {
+			ND_PRINTK0(KERN_ERR
+				   "ICMPv6 RA: %s() got default router without neighbour.\n",
+				   __func__);
+			dst_release(&rt->dst);
+			return;
+		}
+	}
 	if (rt && lifetime == 0) {
-		neigh_clone(neigh);
 		ip6_del_rt(rt);
 		rt = NULL;
 	}
@@ -1244,7 +1250,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			return;
 		}
 
-		neigh = dst_get_neighbour_noref(&rt->dst);
+		neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);
 		if (neigh == NULL) {
 			ND_PRINTK0(KERN_ERR
 				   "ICMPv6 RA: %s() got default router without neighbour.\n",
@@ -1411,7 +1417,7 @@ skip_routeinfo:
 out:
 	if (rt)
 		dst_release(&rt->dst);
-	else if (neigh)
+	if (neigh)
 		neigh_release(neigh);
 }
 
@@ -1506,8 +1512,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 	}
 }
 
-void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
-			 const struct in6_addr *target)
+void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
 {
 	struct net_device *dev = skb->dev;
 	struct net *net = dev_net(dev);
@@ -1566,6 +1571,13 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 		goto release;
 
 	if (dev->addr_len) {
+		struct neighbour *neigh = dst_neigh_lookup(skb_dst(skb), target);
+		if (!neigh) {
+			ND_PRINTK2(KERN_WARNING
+				   "ICMPv6 Redirect: no neigh for target address\n");
+			goto release;
+		}
+
 		read_lock_bh(&neigh->lock);
 		if (neigh->nud_state & NUD_VALID) {
 			memcpy(ha_buf, neigh->ha, dev->addr_len);
@@ -1574,6 +1586,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 			len += ndisc_opt_addr_space(dev);
 		} else
 			read_unlock_bh(&neigh->lock);
+
+		neigh_release(neigh);
 	}
 
 	rd_len = min_t(unsigned int,