Assuming your kernel was built with the IKCONFIG option, you can use the scripts/extract-ikconfig tool to extract the original .config file. Alternately, you can boot that kernel and find the embedded configuration in /proc/config.gz.
I think you have to do just one command and use the created file as you want to. % make savedefconfig % cp defconfig arch/arm/configs/my_cool_defconfig (Pay attention to the filename template that is used for defconfig) To get all possible targets just run % make help As noted by Adam Miller followed by Jeremy, users … Read more
Motivation The .config file is not simply copied from your defconfig file. The motivation for storing defconfig in such a format is next: in defconfig we can specify only options with non-default values (i.e. options we changed for our board). This way we can keep it small and clear. Every new kernel version brings a … Read more