defconfig. Generates a new kernel configuration with the default answer being used for all options. The default values are taken from a file located in the arch/$ARCH/defconfig file, where $ARCH refers to the specific architecture for which the kernel is being built.

What is the use of Defconfig file in Linux?

The platform’s defconfig contains all of the Linux kconfig settings required to properly configure the kernel build (features, default system parameters, etc) for that platform. Defconfig files are typically stored in the kernel tree at arch/*/configs/ .

How do you change Defconfig?

Using the default defconfig as a base, configure the Linux Kernel, and then use make menuconfig to change the configuration as desired. After the customization, generate a new defconfig file and replace the default one. Review the change and create a commit, with that commit, create a patch.