[FE training-materials-updates] Add some more infos about ION

[Maxime Ripard]

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

On branch  : jelly-bean
Link       : http://git.free-electrons.com/training-materials/commit/?id=2da952330c3b5a79c3025a493db5276fdedba5a1

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commit 2da952330c3b5a79c3025a493db5276fdedba5a1
Author: Maxime Ripard <maxime.ripard at free-electrons.com>
Date:   Thu Oct 17 15:05:12 2013 +0200

    Add some more infos about ION
    
    Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>


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

2da952330c3b5a79c3025a493db5276fdedba5a1
 .../android-kernel-changes-ion.tex                 |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/slides/android-kernel-changes-ion/android-kernel-changes-ion.tex b/slides/android-kernel-changes-ion/android-kernel-changes-ion.tex
index d23a625..8a9fa5a 100644
--- a/slides/android-kernel-changes-ion/android-kernel-changes-ion.tex
+++ b/slides/android-kernel-changes-ion/android-kernel-changes-ion.tex
@@ -53,6 +53,10 @@
     \item Its userspace API also allows to allocate and share buffers
       from the userspace, which is not possible right now in mainline
       kernel
+    \item This API is also used to set the allocation constraints
+      devices might have (for example, when one particular device can
+      only access a subset of the memory, or when it needs to setup an
+      IOMMU)
     \end{itemize}
   \end{itemize}
 \end{frame}