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@Belu-cat Belu-cat commented Sep 20, 2025

Scratch in the Linux kernel

Scratch is well-accepted by many to be the best programming language ever. Despite this, the Linux kernel has absolutely no Scratch in it! The advantages to Scratch in the kernel are clear:

  • Accessibility

    With the Linux kernel written in Scratch, more people will be able to contribute to Linux. "Programming" "languages" like C and Rust are based of the assumption that everyone is a dev. This assumption is simply false.

  • Speed

    While Scratch itself is slow, with the help of Turbowarp, it can be BLAZINGLY fast, by compiling Scratch to Javascript. This has the added benefit of allowing web developers to be able to more easily contribute to the kernel.

  • Simplicity

    Scratch is simply cleaner. Code like printf("Hello, world!\n"); is simply bloated. In Scratch, it's as simple as say "Hello, world!". You don't have to worry about anything complex like the "terminal" or "types," whatever those are.

In accordance with these, I have rewritten part of rust/kernel/time.rs in Scratch, and am starting the inclusion of Scratch in the kernel. Perhaps one day, we can rewrite the entire kernel in Scratch, and get all of these benefits without worrying about interoperability with C.

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Hi @Belu-cat!

Thanks for your contribution to the Linux kernel!

Linux kernel development happens on mailing lists, rather than on GitHub - this GitHub repository is a read-only mirror that isn't used for accepting contributions. So that your change can become part of Linux, please email it to us as a patch.

Sending patches isn't quite as simple as sending a pull request, but fortunately it is a well documented process.

Here's what to do:

  • Format your contribution according to kernel requirements
  • Decide who to send your contribution to
  • Set up your system to send your contribution as an email
  • Send your contribution and wait for feedback

How do I format my contribution?

The Linux kernel community is notoriously picky about how contributions are formatted and sent. Fortunately, they have documented their expectations.

Firstly, all contributions need to be formatted as patches. A patch is a plain text document showing the change you want to make to the code, and documenting why it is a good idea.

You can create patches with git format-patch.

Secondly, patches need 'commit messages', which is the human-friendly documentation explaining what the change is and why it's necessary.

Thirdly, changes have some technical requirements. There is a Linux kernel coding style, and there are licensing requirements you need to comply with.

Both of these are documented in the Submitting Patches documentation that is part of the kernel.

Note that you will almost certainly have to modify your existing git commits to satisfy these requirements. Don't worry: there are many guides on the internet for doing this.

Where do I send my contribution?

The Linux kernel is composed of a number of subsystems. These subsystems are maintained by different people, and have different mailing lists where they discuss proposed changes.

If you don't already know what subsystem your change belongs to, the get_maintainer.pl script in the kernel source can help you.

get_maintainer.pl will take the patch or patches you created in the previous step, and tell you who is responsible for them, and what mailing lists are used. You can also take a look at the MAINTAINERS file by hand.

Make sure that your list of recipients includes a mailing list. If you can't find a more specific mailing list, then LKML - the Linux Kernel Mailing List - is the place to send your patches.

It's not usually necessary to subscribe to the mailing list before you send the patches, but if you're interested in kernel development, subscribing to a subsystem mailing list is a good idea. (At this point, you probably don't need to subscribe to LKML - it is a very high traffic list with about a thousand messages per day, which is often not useful for beginners.)

How do I send my contribution?

Use git send-email, which will ensure that your patches are formatted in the standard manner. In order to use git send-email, you'll need to configure git to use your SMTP email server.

For more information about using git send-email, look at the Git documentation or type git help send-email. There are a number of useful guides and tutorials about git send-email that can be found on the internet.

How do I get help if I'm stuck?

Firstly, don't get discouraged! There are an enormous number of resources on the internet, and many kernel developers who would like to see you succeed.

Many issues - especially about how to use certain tools - can be resolved by using your favourite internet search engine.

If you can't find an answer, there are a few places you can turn:

If you get really, really stuck, you could try the owners of this bot, @daxtens and @ajdlinux. Please be aware that we do have full-time jobs, so we are almost certainly the slowest way to get answers!

I sent my patch - now what?

You wait.

You can check that your email has been received by checking the mailing list archives for the mailing list you sent your patch to. Messages may not be received instantly, so be patient. Kernel developers are generally very busy people, so it may take a few weeks before your patch is looked at.

Then, you keep waiting. Three things may happen:

  • You might get a response to your email. Often these will be comments, which may require you to make changes to your patch, or explain why your way is the best way. You should respond to these comments, and you may need to submit another revision of your patch to address the issues raised.
  • Your patch might be merged into the subsystem tree. Code that becomes part of Linux isn't merged into the main repository straight away - it first goes into the subsystem tree, which is managed by the subsystem maintainer. It is then batched up with a number of other changes sent to Linus for inclusion. (This process is described in some detail in the kernel development process guide).
  • Your patch might be ignored completely. This happens sometimes - don't take it personally. Here's what to do:
    • Wait a bit more - patches often take several weeks to get a response; more if they were sent at a busy time.
    • Kernel developers often silently ignore patches that break the rules. Check for obvious violations of the Submitting Patches guidelines, the style guidelines, and any other documentation you can find about your subsystem. Check that you're sending your patch to the right place.
    • Try again later. When you resend it, don't add angry commentary, as that will get your patch ignored. It might also get you silently blacklisted.

Further information

Happy hacking!

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@imeesa imeesa left a comment

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lgtm

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LGTM

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@FireAcidCow FireAcidCow left a comment

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The README looks great, but for the scratch/kernel/time.sb3, it appears to be a zip of the project files and not the project files themselves. Please upload the actual source code files instead of the repository.

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im frothing at the mouth rn

@Belu-cat
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The README looks great, but for the scratch/kernel/time.sb3, it appears to be a zip of the project files and not the project files themselves. Please upload the actual source code files instead of the repository.

The zip file is the source code. To open it, use an online editor (like https://scratch.mit.edu/ or https://turbowarp.org/) or install an offline editor.

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Hi there, thank you for your time, I have went through the scratch file you included and noticed that most custom code blocks are left undefined (image provided below)
image
I am not sure whether or not these are meant to be fixed later or, or if they are calls to external functions. (Given the fact that the "use" custom code block is also left undefined - therefore making it impossible to make calls to external bindings - I am inclined to believe it's the former.)
I request that you fix these functions before merging.

Thanks, Joe Biden.

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The zip file is the source code. To open it, use an online editor (like https://scratch.mit.edu/ or https://turbowarp.org/) or install an offline editor.

The zip file contains the source code. As with the rest of the kernel, there are .c and .rs files that can be opened in a plaintext editor. This would be the same as downloading the zip file of a project on github and adding that as part of the source code. It requires extra steps that are unnecessary. I suggest using this tool to convert the scratch sb3 into something that makes sense in a github repository. It makes it simple to read and see changes without having to download then upload the file to another tool.

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@stella23456789 stella23456789 left a comment

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LGTM!

@imeesa
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imeesa commented Sep 21, 2025

The zip file is the source code. To open it, use an online editor (like https://scratch.mit.edu/ or https://turbowarp.org/) or install an offline editor.

The zip file contains the source code. As with the rest of the kernel, there are .c and .rs files that can be opened in a plaintext editor. This would be the same as downloading the zip file of a project on GitHub and adding that as part of the source code. It requires extra steps that are unnecessary. I suggest using this tool to convert the scratch sb3 into something that makes sense in a GitHub repository. It makes it simple to read and see changes without having to download then upload the file to another tool.

The .sb3 file is the only standard and accepted way to use and distribute Scratch 3.0 source code. Simply having the contents in a folder is not supported by official Scratch development tooling. Additionally, the tooling you suggested requires both GitHub Desktop and M*crosoft W*ndows. This software is not appropriate for Linux Kernel development.

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lacking bytes

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The zip file is the source code. To open it, use an online editor (like https://scratch.mit.edu/ or https://turbowarp.org/) or install an offline editor.

The zip file contains the source code. As with the rest of the kernel, there are .c and .rs files that can be opened in a plaintext editor. This would be the same as downloading the zip file of a project on github and adding that as part of the source code. It requires extra steps that are unnecessary. I suggest using this tool to convert the scratch sb3 into something that makes sense in a github repository. It makes it simple to read and see changes without having to download then upload the file to another tool.

You are lying. Typing this as we speak from this PR, and it run's great. Merge!

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Rewrite in goboscript

@torvalds torvalds closed this Sep 22, 2025
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