Android Kernel Download

Main Google Android Kernels
The main Google repository with Android source code is at: http://android.git.kernel.org/

There are (as of September 2009) 4 main separate kernel repositories at that site:
 * common
 * experimental
 * msm
 * omap

To download one of these and use it directly, you can use git. For example: git clone git://android.git.kernel.org/kernel/common.git kernel

To preserve your sanity, it's probably worth downloading this into a 'kernel' directory in your overall Android source directory scheme

To add one of these to your overall Android repository scheme, you add the appropriate kernel repository to your local_manifest.xml file. (???)

Note that when you download the rest of the Android source code, using the 'repo' command, you do NOT automatically get a kernel tree included. (That is, a kernel git tree is not referenced in the default Android manifest file, when you use repo following the instructions at http://source.android.com/download

For more about repo, see http://source.android.com/download/using-repo

Other Repositories with Android-specific changes

 * Linux kernel for omap and beagle-board, by Embinux: http://labs.embinux.org/git/cgit.cgi/repo/kernel.git
 * clone with: git clone git://labs.embinux.org/repo/kernel.git kernel

'Raw' Android kernel patches
I do not know of any freely available patches for the Linux kernel with the Android fixes, as of November 2009. I have, however, heard of multiple efforts to extract the patches to make it easier to port the Android kernel features onto newer Linux kernels.

Here is a way of extracting raw Android patches at a certain point in time, though this may be dated:

git clone git://android.git.kernel.org/kernel/common.git android-kernel cd android-kernel git checkout --track -b android-2.6.32 origin/android-2.6.32 git fetch --tags git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6.32.y.git git shortlog v2.6.32.9..HEAD git format-patch v2.6.32.9..HEAD

Sum total 173 patches for the 2.6.32.9 kernel as of writing.

If anyone knows where raw android kernel patches are available, please add a link here. See also the Android Kernel Features page for more information about individual kernel features.