diff --git a/sys/dev/raid/ida/ida.c b/sys/dev/raid/ida/ida.c
--- a/sys/dev/raid/ida/ida.c
+++ b/sys/dev/raid/ida/ida.c
@@ -293,7 +293,7 @@
 	 */
 
 
-	ida_free(ida);
+	ida_free(ida); /* DF-1916: SMP race documented; needs lock refactor */
 	return (error);
 }