Index: uspace/lib/ext4/src/ops.c
===================================================================
--- uspace/lib/ext4/src/ops.c	(revision 7bdedb533b13ce9dbb7e08b5e88ce029dbf6f6b3)
+++ uspace/lib/ext4/src/ops.c	(revision 78a71936030962dcd5ed19c056644d59e3c7d9d1)
@@ -101,7 +101,7 @@
 } node_key_t;
 
-static size_t open_nodes_key_hash(void *key_arg)
-{
-	node_key_t *key = (node_key_t *)key_arg;
+static size_t open_nodes_key_hash(const void *key_arg)
+{
+	const node_key_t *key = key_arg;
 	return hash_combine(key->service_id, key->index);
 }
@@ -113,7 +113,7 @@
 }
 
-static bool open_nodes_key_equal(void *key_arg, const ht_link_t *item)
-{
-	node_key_t *key = (node_key_t *)key_arg;
+static bool open_nodes_key_equal(const void *key_arg, const ht_link_t *item)
+{
+	const node_key_t *key = key_arg;
 	ext4_node_t *enode = hash_table_get_inst(item, ext4_node_t, link);