docs: clearing-warn-once.txt: add a title for this document

This document misses a title. Add it, in order to follow
the documentation standard.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/clearing-warn-once.txt b/Documentation/clearing-warn-once.txt
index 5b1f5d547be12d965da254a83e6b9cb24272842d..4aa938262d0ea5724db100e42f7a066fcc86b493 100644 (file)
--- a/Documentation/clearing-warn-once.txt
+++ b/Documentation/clearing-warn-once.txt
@@ -1,3 +1,5 @@
+Clearing WARN_ONCE
+------------------
 
 WARN_ONCE / WARN_ON_ONCE only print a warning once.