Pre-compiled modules ==================== Some modules are pre-compiled due to needing cross-compilers present on the build/dev machine which is inconvenient. Makefile is ready to compile them again in case they are missing: 1) Prepare the linux kernel trees to build external modules, i.e.: kernel $ make ARCH=<arch> CROSS_COMPILER=<cross-compiler-prefix> defconfig kernel $ make ARCH=<arch> CROSS_COMPILER=<cross-compiler-prefix> modules_prepare For each architecture. See the Makefile to check which are the supported architectures. 2) Export the variables below to point to the right place: KDIR_<arch>: for each architecture it needs to point to a kernel tree configured as in (1) CROSS_COMPILER_<arch: for each architecture it needs to point to the correct toolchain prefix. Leave it blank if a cross-compiler is not needed (example: you are building a 32b module with a multilib compiler). 3) Remove every %-<arch>.ko. After this the build system will recreate them.