From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Mon, 17 Oct 2011 14:34:36 +0000 (-0400)
Subject: Fix dummy node insertion bug
X-Git-Tag: v0.7.0~43^2~88
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=194fdbd18a42d2c23f4a53cc692f1fa03d31ec64;p=urcu.git

Fix dummy node insertion bug

dummy node is the first node of the identical-hash-value chain

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/rculfhash.c b/rculfhash.c
index 6e07878..a736b86 100644
--- a/rculfhash.c
+++ b/rculfhash.c
@@ -887,6 +887,9 @@ struct cds_lfht_node *_cds_lfht_add(struct cds_lfht *ht,
 				goto insert;
 			if (likely(clear_flag(iter)->p.reverse_hash > node->p.reverse_hash))
 				goto insert;
+			/* dummy node is the first node of the identical-hash-value chain */
+			if (dummy && clear_flag(iter)->p.reverse_hash == node->p.reverse_hash)
+				goto insert;
 			next = rcu_dereference(clear_flag(iter)->p.next);
 			if (unlikely(is_removed(next)))
 				goto gc_node;