[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=bd2906a116ec7bd45e7ef5bb17f61b4f49fc3aae

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

commit bd2906a116ec7bd45e7ef5bb17f61b4f49fc3aae
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>


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

bd2906a116ec7bd45e7ef5bb17f61b4f49fc3aae
 .../android-kernel-changes-wakelocks.tex           |   10 ++++++++++
 1 file changed, 10 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..dcb4b95 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 +60,13 @@ $ 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}
+