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-rw-r--r--lib/prio_tree.c38
1 files changed, 14 insertions, 24 deletions
diff --git a/lib/prio_tree.c b/lib/prio_tree.c
index 888e8b3a97e..928482bb838 100644
--- a/lib/prio_tree.c
+++ b/lib/prio_tree.c
@@ -94,43 +94,33 @@ static inline unsigned long prio_tree_maxindex(unsigned int bits)
static struct prio_tree_node *prio_tree_expand(struct prio_tree_root *root,
struct prio_tree_node *node, unsigned long max_heap_index)
{
- struct prio_tree_node *first = NULL, *prev, *last = NULL;
+ struct prio_tree_node *prev;
if (max_heap_index > prio_tree_maxindex(root->index_bits))
root->index_bits++;
+ prev = node;
+ INIT_PRIO_TREE_NODE(node);
+
while (max_heap_index > prio_tree_maxindex(root->index_bits)) {
+ struct prio_tree_node *tmp = root->prio_tree_node;
+
root->index_bits++;
if (prio_tree_empty(root))
continue;
- if (first == NULL) {
- first = root->prio_tree_node;
- prio_tree_remove(root, root->prio_tree_node);
- INIT_PRIO_TREE_NODE(first);
- last = first;
- } else {
- prev = last;
- last = root->prio_tree_node;
- prio_tree_remove(root, root->prio_tree_node);
- INIT_PRIO_TREE_NODE(last);
- prev->left = last;
- last->parent = prev;
- }
- }
-
- INIT_PRIO_TREE_NODE(node);
+ prio_tree_remove(root, root->prio_tree_node);
+ INIT_PRIO_TREE_NODE(tmp);
- if (first) {
- node->left = first;
- first->parent = node;
- } else
- last = node;
+ prev->left = tmp;
+ tmp->parent = prev;
+ prev = tmp;
+ }
if (!prio_tree_empty(root)) {
- last->left = root->prio_tree_node;
- last->left->parent = last;
+ prev->left = root->prio_tree_node;
+ prev->left->parent = prev;
}
root->prio_tree_node = node;