-/* Initializes 'all_dps' and enumerates the names of all known created
- * datapaths, where possible, into it. Returns 0 if successful, otherwise a
- * positive errno value.
+/* Clears 'all_dps' and enumerates the names of all known created datapaths,
+ * where possible, into it. The caller must first initialize 'all_dps'.
+ * Returns 0 if successful, otherwise a positive errno value.