A Yocto Cheatsheet

Use external kernel source

Add the following lines to local.conf file.

INHERIT += "externalsrc"
EXTERNALSRC:pn-linux-raspberrypi = "/path/to/linux-kernel"

Add extra tasks in recipe file

do_reloc_what_you_want() {
    // specific jobs
}
addtask reloc_what_you_want before do_configure after do_prepare_recipe_sysroot