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-rw-r--r--target/linux/generic/pending-3.18/080-07-fib_trie-Optimize-fib_find_node.patch64
1 files changed, 0 insertions, 64 deletions
diff --git a/target/linux/generic/pending-3.18/080-07-fib_trie-Optimize-fib_find_node.patch b/target/linux/generic/pending-3.18/080-07-fib_trie-Optimize-fib_find_node.patch
deleted file mode 100644
index 0193f758f6..0000000000
--- a/target/linux/generic/pending-3.18/080-07-fib_trie-Optimize-fib_find_node.patch
+++ /dev/null
@@ -1,64 +0,0 @@
-From: Alexander Duyck <alexander.h.duyck@redhat.com>
-Date: Wed, 31 Dec 2014 10:56:00 -0800
-Subject: [PATCH] fib_trie: Optimize fib_find_node
-
-This patch makes use of the same features I made use of for
-fib_table_lookup to streamline fib_find_node. The resultant code should be
-smaller and run faster than the original.
-
-Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
-
---- a/net/ipv4/fib_trie.c
-+++ b/net/ipv4/fib_trie.c
-@@ -892,28 +892,34 @@ static void insert_leaf_info(struct hlis
- }
-
- /* rcu_read_lock needs to be hold by caller from readside */
--
- static struct tnode *fib_find_node(struct trie *t, u32 key)
- {
- struct tnode *n = rcu_dereference_rtnl(t->trie);
-- int pos = 0;
-
-- while (n && IS_TNODE(n)) {
-- if (tkey_sub_equals(n->key, pos, n->pos-pos, key)) {
-- pos = n->pos + n->bits;
-- n = tnode_get_child_rcu(n,
-- tkey_extract_bits(key,
-- n->pos,
-- n->bits));
-- } else
-+ while (n) {
-+ unsigned long index = get_index(key, n);
-+
-+ /* This bit of code is a bit tricky but it combines multiple
-+ * checks into a single check. The prefix consists of the
-+ * prefix plus zeros for the bits in the cindex. The index
-+ * is the difference between the key and this value. From
-+ * this we can actually derive several pieces of data.
-+ * if !(index >> bits)
-+ * we know the value is cindex
-+ * else
-+ * we have a mismatch in skip bits and failed
-+ */
-+ if (index >> n->bits)
-+ return NULL;
-+
-+ /* we have found a leaf. Prefixes have already been compared */
-+ if (IS_LEAF(n))
- break;
-- }
-- /* Case we have found a leaf. Compare prefixes */
-
-- if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key))
-- return n;
-+ n = rcu_dereference_rtnl(n->child[index]);
-+ }
-
-- return NULL;
-+ return n;
- }
-
- static void trie_rebalance(struct trie *t, struct tnode *tn)