doc: Say what to do if submodules are out of date.

Signed-off-by: Tommi Virtanen <tv@inktank.com>

diff --git a/doc/source/clone-source.rst b/doc/source/clone-source.rst
index 87c0cc4e1ce0c36813990af9c7f212a741ab2583..37ab6bc8cec94ff12bd4ec89810804413057a1dd 100644 (file)
--- a/doc/source/clone-source.rst
+++ b/doc/source/clone-source.rst
@@ -20,6 +20,10 @@ repository.
 
        git status
 
+   If they are, run::
+
+        git submodule update
+
 Choose a Branch
 ---------------
 Once you clone the source code and submodules, your Ceph repository