From: Cody P Schafer Subject: [PATCH v2 04/11] net ipset: use rbtree postorder iteration instead of opencoding Date: Wed, 6 Nov 2013 17:42:33 -0800 Message-ID: <1383788572-25938-5-git-send-email-cody@linux.vnet.ibm.com> References: <1383788572-25938-1-git-send-email-cody@linux.vnet.ibm.com> Cc: LKML , Cody P Schafer , coreteam@netfilter.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, netfilter@vger.kernel.org, Patrick McHardy To: Andrew Morton , EXT4 , Jan Kara , rostedt@goodmis.org, "David S. Miller" , Florian Westphal , Jozsef Kadlecsik , Pablo Neira Ayuso , YOSHIFUJI Hideaki Return-path: In-Reply-To: <1383788572-25938-1-git-send-email-cody@linux.vnet.ibm.com> Sender: netdev-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead of opencoding an alternate postorder iteration that modifies the tree Signed-off-by: Cody P Schafer --- net/netfilter/ipset/ip_set_hash_netiface.c | 27 ++++----------------------- 1 file changed, 4 insertions(+), 23 deletions(-) diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c index 7d798d5..99dba4c 100644 --- a/net/netfilter/ipset/ip_set_hash_netiface.c +++ b/net/netfilter/ipset/ip_set_hash_netiface.c @@ -45,31 +45,12 @@ struct iface_node { static void rbtree_destroy(struct rb_root *root) { - struct rb_node *p, *n = root->rb_node; - struct iface_node *node; - - /* Non-recursive destroy, like in ext3 */ - while (n) { - if (n->rb_left) { - n = n->rb_left; - continue; - } - if (n->rb_right) { - n = n->rb_right; - continue; - } - p = rb_parent(n); - node = rb_entry(n, struct iface_node, node); - if (!p) - *root = RB_ROOT; - else if (p->rb_left == n) - p->rb_left = NULL; - else if (p->rb_right == n) - p->rb_right = NULL; + struct iface_node *node, *next; + rbtree_postorder_for_each_entry_safe(node, next, root, node) kfree(node); - n = p; - } + + *root = RB_ROOT; } static int -- 1.8.4.2