Rebuilding A Kernel Module On The Fly(Build a kernel module without rebuilding kernel)

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本文提供了一种在不重建整个内核的情况下即时重构内核模块的方法，通过一系列步骤操作，帮助开发者快速验证修复，节省时间。

https://wiki.ubuntu.com/Kernel/Dev/KernelModuleRebuild

This wiki page outlines a process that can be used to rebuild a kernel module on-the-fly versus having to rebuild an entire kernel to quickly verify a fix. If this trick saved you time, buy manjo a beer.

Do the following in your home directory.

Overview

In your home directory (or chose your working directory).

$ sudo apt-get install linux-source
$ tar xjf /usr/src/linux-source-<version>.tar.bz2

$ mkdir build_module
$ cd ./linux-source-<version>
$ patch -p1 < </path to patch/xxx.patch>
$ make mrproper

From your home directory do
$ cp /lib/modules/`uname -r`/build/.config ./build_module/
$ cp /lib/modules/`uname -r`/build/Module.symvers ./build_module/
$ cp /lib/modules/`uname -r`/build/Makefile ./build_module/

$ cd ./linux-source-<version>
$ make O=../build_module outputmakefile
$ make O=../build_module archprepare
(If you encounter an error at this stage, run make mrproper and return to the last cp above and continue again from there)
$ make O=../build_module prepare
$ make O=../build_module modules SUBDIRS=scripts
$ make O=../build_module modules SUBDIRS=drivers/<patch to driver>/
$cd 

$ sudo cp ./build_module/drivers/<path>/<driver>.ko /lib/modules/`uname -r`/kernel/drivers/<path>/