rusefi-1/firmware/chibios
..
boards
ext/fatfs/src
os
create_patch.sh
file.lst
readme.txt
rusefi_chibios.patch

readme.txt

In this folder we have ChibiOS 2.6.1 with rusefi_chibios.patch applied

rusefi_chibios.patch is only about minor improvements to fatal error message - like __FILE__ info and maybe better messages.