diff --git a/[refs] b/[refs]
index 650c1d7cd98c..86ae9561314e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e53252d97e670a38b1d2e9723b48077bba11ddda
+refs/heads/master: a0a9983509f45b2225ca87fdcf7b40ea916834ed
diff --git a/trunk/Documentation/gpio.txt b/trunk/Documentation/gpio.txt
index 36af58eba136..218a8650f48d 100644
--- a/trunk/Documentation/gpio.txt
+++ b/trunk/Documentation/gpio.txt
@@ -75,6 +75,9 @@ using the include file:
 If you stick to this convention then it'll be easier for other developers to
 see what your code is doing, and help maintain it.
 
+Note that these operations include I/O barriers on platforms which need to
+use them; drivers don't need to add them explicitly.
+
 
 Identifying GPIOs
 -----------------