[PATCH 2/5] kern (rbtree_insert_rebalance): rewrite node swap

[Marin Ramesa]

Value of node is never read. Simplify the node swap to one assignment
and remove the temporary variable.

* kern/rbtree.c (rbtree_insert_rebalance): Simplify node swap.

---
 kern/rbtree.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kern/rbtree.c b/kern/rbtree.c
index 0f5eb9a..d90a8bc 100644
--- a/kern/rbtree.c
+++ b/kern/rbtree.c
@@ -147,7 +147,7 @@ static void rbtree_rotate(struct rbtree *tree, struct 
rbtree_node *node,
 void rbtree_insert_rebalance(struct rbtree *tree, struct rbtree_node *parent,
                              int index, struct rbtree_node *node)
 {
-    struct rbtree_node *grand_parent, *uncle, *tmp;
+    struct rbtree_node *grand_parent, *uncle;
     int left, right;
 
     assert(rbtree_check_alignment(parent));
@@ -196,9 +196,7 @@ void rbtree_insert_rebalance(struct rbtree *tree, struct 
rbtree_node *parent,
          */
         if (parent->children[right] == node) {
             rbtree_rotate(tree, parent, left);
-            tmp = node;
-            node = parent;
-            parent = tmp;
+            parent = node;
         }
 
         /*
-- 
1.8.1.4