[OSSNA] Intro to kernel hacking tutorial

Tobin C. Harding me at tobin.cc
Tue Sep 3 01:49:42 UTC 2019


On Mon, Sep 02, 2019 at 10:08:54AM -0400, Valdis Klētnieks wrote:
> On Mon, 02 Sep 2019 15:42:19 +0300, Anatoly Pugachev said:
> 
> > is it intentionally that you use
> >
> > yes "" | make oldconfig
> >
> > instead of
> >
> > make olddefconfig
> 
> They do something different.  'olddefconfig' just takes the platform or
> architecture defconfig and updates it for any new CONFIG_* variables added
> since the last time the defconfig was updated in the tree.
> 
> yes "" | make oldconfig  does the same updating for new CONFIG_* variables, but
> starts with the most recent .config - which produces wildly different results
> if the .config had previously been minimized by 'make localmodconfig' or other
> similar techniques.

Thanks Valdis, you're the man!


       Tobin


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