[bootlin/training-materials updates] master: Embedded Linux: misc updates (bedb5c32)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/bedb5c322458c1041583a2a1fd27ed0fd2b877c7

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

commit bedb5c322458c1041583a2a1fd27ed0fd2b877c7
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Fri Feb 26 16:40:07 2021 +0100

    Embedded Linux: misc updates
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


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

bedb5c322458c1041583a2a1fd27ed0fd2b877c7
 slides/sysdev-block-filesystems/sysdev-block-filesystems.tex | 7 +++++--
 slides/sysdev-flash-filesystems/sysdev-flash-filesystems.tex | 4 ++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/slides/sysdev-block-filesystems/sysdev-block-filesystems.tex b/slides/sysdev-block-filesystems/sysdev-block-filesystems.tex
index 9b663ca0..4f32153d 100644
--- a/slides/sysdev-block-filesystems/sysdev-block-filesystems.tex
+++ b/slides/sysdev-block-filesystems/sysdev-block-filesystems.tex
@@ -103,7 +103,7 @@ major minor #blocks name
   \end{itemize}
 \end{frame}
 
-\subsection{Available filesystems}
+\subsection{Available block filesystems}
 
 \begin{frame}{Standard Linux filesystem format: ext2, ext3, ext4}
   \begin{itemize}
@@ -152,6 +152,8 @@ major minor #blocks name
       shutdown are clearly identified
     \item Does not mean that the latest writes made it to the storage:
       this depends on syncing the changes to the filesystem.
+    \item What matters is to avoid filesystem corruption and be able
+      to boot autonomously.
     \end{itemize}
     See \url{https://en.wikipedia.org/wiki/Journaling_file_system}
     for further details.
@@ -337,7 +339,8 @@ major minor #blocks name
     \end{itemize}
   \item Mounting a squashfs filesystem:
     \begin{itemize}
-    \item \code{mount -t squashfs /dev/<device> /mnt}
+    \item \code{mount -o loop rootfs.sqfs /mnt} (filesystem image)
+    \item \code{mount /dev/<device> /mnt} (after copy to device)
     \end{itemize}
   \end{itemize}
 \end{frame}
diff --git a/slides/sysdev-flash-filesystems/sysdev-flash-filesystems.tex b/slides/sysdev-flash-filesystems/sysdev-flash-filesystems.tex
index 127c9700..59019087 100644
--- a/slides/sysdev-flash-filesystems/sysdev-flash-filesystems.tex
+++ b/slides/sysdev-flash-filesystems/sysdev-flash-filesystems.tex
@@ -925,8 +925,8 @@ Device 0 bad blocks:
      on UBIFS, the UBI volume used as root filesystem, and the MTD
      partition attached to UBI. Example:\\
      {\footnotesize \code{setenv bootargs_base console=ttyS0 rootfstype=ubifs root=ubi0:rootfs ubi.mtd=UBI}}
-  \item Define the boot command sequence, loading the U-Boot partition
-     definitions, loading kernel and DTB images from UBI partitions,
+  \item Define the boot command sequence, initializing UBI,
+     loading kernel and DTB images from UBI partitions,
      and adding \code{mtdparts} to the kernel command
      line. Example:\\
      \code{setenv bootcmd 'ubi part UBI; ubi readvol