[FE training-materials-updates] Add a slide on autosleep

[Alexandre Belloni]

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=aad8f873a3e66e762199cc7c3c50ea31cf311e00

>---------------------------------------------------------------

commit aad8f873a3e66e762199cc7c3c50ea31cf311e00
Author: Alexandre Belloni <alexandre.belloni at free-electrons.com>
Date:   Mon Mar 18 17:28:45 2013 +0100

    Add a slide on autosleep
    
    Signed-off-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>


>---------------------------------------------------------------

aad8f873a3e66e762199cc7c3c50ea31cf311e00
 .../android-kernel-changes-wakelocks.tex           |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/slides/android-kernel-changes-wakelocks/android-kernel-changes-wakelocks.tex b/slides/android-kernel-changes-wakelocks/android-kernel-changes-wakelocks.tex
index 356960e..d340fd1 100644
--- a/slides/android-kernel-changes-wakelocks/android-kernel-changes-wakelocks.tex
+++ b/slides/android-kernel-changes-wakelocks/android-kernel-changes-wakelocks.tex
@@ -60,3 +60,17 @@ $ echo foobar > /sys/power/wake_unlock
 \end{minted}
 \end{itemize}
 \end{frame}
+
+\begin{frame}
+  \frametitle{Vanilla kernel}
+  Since version 3.5, two features were included in the kernel to
+  implement opportunistic suspend :
+  \begin{itemize}
+  \item autosleep is a way to let the kernel trigger suspend or
+	  hibernate whenever there are no active wakeup sources.
+  \item wake locks are a way to create and manipulate wakeup sources
+	  from user space. The interface is compatible with the android
+	  one.
+  \end{itemize}
+\end{frame}
+