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README.md

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Kernel

The Raspberry Pi kernel is stored in GitHub and can be viewed at github.com/raspberrypi/linux; it follows behind the main Linux kernel.

The main Linux kernel is continuously updating; we take long-term releases of the kernel, which are mentioned on the front page, and integrate the changes into the Raspberry Pi kernel. We then create a 'next' branch which contains an unstable port of the kernel; after extensive testing and discussion, we push this to the main branch.

Getting your code into the kernel

There are many reasons you may want to put something into the kernel:

  • You've written some Raspberry Pi-specific code that you want everyone to benefit from
  • You've written a generic Linux kernel driver for a device and want everyone to use it
  • You've fixed a generic kernel bug
  • You've fixed a Raspberry Pi-specific kernel bug

Initially, you should fork the Linux repository and clone that on your build system; this can be either on the Raspberry Pi or on a Linux machine you're using for cross-compiling. You can then make your changes, test them, and commit them into your fork.

Next, depending upon whether the code is Raspberry Pi-specific or not:

  • For Pi-specific changes or bug fixes, submit a pull request to the kernel.

  • For general Linux kernel changes (i.e. a new driver), these need to be submitted upstream first. Once they've been submitted upstream and accepted, submit the pull request and we'll receive it.