diff --git a/Documentation/SubmitChecklist b/Documentation/SubmitChecklist
index bd23dc0..6491b2c 100644
--- a/Documentation/SubmitChecklist
+++ b/Documentation/SubmitChecklist
@@ -80,3 +80,7 @@
 23: Tested after it has been merged into the -mm patchset to make sure
     that it still works with all of the other queued patches and various
     changes in the VM, VFS, and other subsystems.
+
+24: Avoid whitespace damage such as indenting with spaces or whitespace
+    at the end of lines.  You can test this by feeding the patch to
+    "git apply --check --whitespace=error-all"