[FE training-materials-updates] kernel labs: add details about MMC saveenv

[Michael Opdenacker]

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

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=8468d49e8e4054d066911c3f203a281d43ff2c6d

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commit 8468d49e8e4054d066911c3f203a281d43ff2c6d
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Fri Oct 4 10:28:29 2013 +0200

    kernel labs: add details about MMC saveenv
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


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8468d49e8e4054d066911c3f203a281d43ff2c6d
 labs/kernel-board-setup/kernel-board-setup.tex |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/labs/kernel-board-setup/kernel-board-setup.tex b/labs/kernel-board-setup/kernel-board-setup.tex
index 29ee245..4199f58 100644
--- a/labs/kernel-board-setup/kernel-board-setup.tex
+++ b/labs/kernel-board-setup/kernel-board-setup.tex
@@ -226,6 +226,11 @@ setenv serverip 192.168.0.1
 \end{verbatim}
 
 Save these settings to the MMC card:
+\footnote{The U-boot environment settings are stored in some free space
+between the master boot record (512 bytes, containing the partition
+tables and other stuff), and the beginning of the first partition (often
+at \code{32256}). This is why you won't find any related file in the
+first partition.}
 
 \begin{verbatim}
 saveenv