Merge pull request #248 from essensium-mind/sysdev-kernel-building-im…

…provements

Sysdev kernel building improvements

slides/sysdev-kernel-building/sysdev-kernel-building.tex

@@ -151,10 +151,14 @@ \subsection{Kernel configuration}
         \code{make savedefconfig}
       \item Save this default configuration in the right directory:\\
         \code{mv defconfig arch/<arch>/configs/myown_defconfig}
+      \item Add this file to Git.
       \end{itemize}
     \item This way, you can share a reference configuration inside
       the kernel sources and other developers can now get the same
       \code{.config} as you by running \code{make myown_defconfig}
+    \item When you use an embedded build system (Buildroot, OpenEmbedded)
+      use its specific commands. E.g. \code{make linux-menuconfig} and
+      \code{make linux-update-defconfig} in Buildroot.
   \end{itemize}
 \end{frame}
 
@@ -267,6 +271,7 @@ \subsection{Kernel configuration}
       \item Simple text file, \code{CONFIG_PARAM=value}
       \item Options are grouped by sections and are prefixed with
         \code{CONFIG_}
+      \item "No" value is encoded as \code{# CONFIG_FOO is not set}
       \item Included by the top-level kernel Makefile
       \item Typically not edited by hand because of the dependencies
       \end{itemize}