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net/netfilter/ipset/ip_set_hash_netiface.c: use rbtree postorder iteration instead of opencoding 

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 <cody@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cody P Schafer 2014-01-23 15:56:07 -08:00 committed by Linus Torvalds
parent 964fe94d71
commit b182837ac1
1 changed files with 4 additions and 23 deletions
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27
net/netfilter/ipset/ip_set_hash_netiface.c
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@ -46,31 +46,12 @@ 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