diff --git a/[refs] b/[refs]
index afd6cad16635..cc7bb0cc1bb3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4e0d13cbb71de2b1baf71ddd3c14f7ba8da810e5
+refs/heads/master: bef67c5a7d3a9c45e091e36625c09c0c811e2672
diff --git a/trunk/Documentation/cgroups.txt b/trunk/Documentation/cgroups.txt
index 824fc0274471..d9014aa0eb68 100644
--- a/trunk/Documentation/cgroups.txt
+++ b/trunk/Documentation/cgroups.txt
@@ -390,6 +390,10 @@ If you have several tasks to attach, you have to do it one after another:
 	...
 # /bin/echo PIDn > tasks
 
+You can attach the current shell task by echoing 0:
+
+# echo 0 > tasks
+
 3. Kernel API
 =============