From: Andi Kleen <ak@linux.intel.com>
Date: Thu, 28 Aug 2008 08:09:54 +0000 (-0700)
Subject: inet_diag: Add empty bucket optimization to inet_diag too
X-Git-Tag: firefly_0821_release~17825^2~387
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6be547a61d6220199826070cda792297c3d15994;p=firefly-linux-kernel-4.4.55.git

inet_diag: Add empty bucket optimization to inet_diag too

Skip quickly over empty buckets in inet_diag.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index c10036e7a463..89cb047ab314 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -782,11 +782,15 @@ skip_listen_ht:
 		struct sock *sk;
 		struct hlist_node *node;
 
+		num = 0;
+
+		if (hlist_empty(&head->chain) && hlist_empty(&head->twchain))
+			continue;
+
 		if (i > s_i)
 			s_num = 0;
 
 		read_lock_bh(lock);
-		num = 0;
 		sk_for_each(sk, node, &head->chain) {
 			struct inet_sock *inet = inet_sk(sk);