diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index 15a2a53e77b0e33e8a007f61567d3db113a1608f..38fd5681fade4b5a21ecf748d309eb1c5c3c4831 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst
@@ -190,6 +190,9 @@ function calls GCC directly inserts the code to check the shadow memory.
 This option significantly enlarges kernel but it gives x1.1-x2 performance
 boost over outline instrumented kernel.
 
+Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one
+and the second to last.
+
 Software tag-based KASAN
 ~~~~~~~~~~~~~~~~~~~~~~~~