[FE training-materials-updates] Fix broken link about container_of()

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git
On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=a53746b7316dd9275e48830e75eb31cb9bf83a7c

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commit a53746b7316dd9275e48830e75eb31cb9bf83a7c
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Mon Dec 11 15:34:26 2017 +0100

    Fix broken link about container_of()
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


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

a53746b7316dd9275e48830e75eb31cb9bf83a7c
 labs/kernel-serial-output/kernel-serial-output.tex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/labs/kernel-serial-output/kernel-serial-output.tex b/labs/kernel-serial-output/kernel-serial-output.tex
index 25ceaa0..03ca661 100644
--- a/labs/kernel-serial-output/kernel-serial-output.tex
+++ b/labs/kernel-serial-output/kernel-serial-output.tex
@@ -105,7 +105,7 @@ struct feserial_dev *dev =
 	container_of(file->private_data, struct feserial_dev, miscdev);
 \end{verbatim}
 
-See \url{http://linuxwell.com/2012/11/10/magical-container_of-macro/}
+See \url{http://radek.io/2012/11/10/magical-container_of-macro/}
 for interesting implementation details about this macro.
 
 This wouldn't have been possible if the \code{miscdevice} structure