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I have the source of Linux 3.4.0 to which I added some modifications. I know that here (ftp://ftp.kernel.org/pub/linux/kernel/v3.x/) I can find all the 107 patches that need to be applied to my source to update it to the 3.4.107 version.

I read that I have to apply them one by one: first the 3.4.1, then the 3.4.2, then the 3.4.3 etc.

But my doubt is: can I apply directly the 3.4.107 patch?

I opened the 3.4.107 patch file and noticed that it changes SUBLEVEL = 0 in Makefile to SUBLEVEL = 107, so I thought that this means that it is meant to be used by devs who still have got the 3.4.0 source. What's more, I also noticed that the size of the patch files increases from 3.4.1 to 3.4.107, this seems to confirm my idea that every patch contains:

  • all the changes that are included in the previous patches
  • its new fixes.

Can you tell me whether I'm right or not?

  • Why not just do a make oldconf? – SailorCire Jun 2 '15 at 17:51
  • I have 3.4.0 source and I want to update it to 3.4.107 with patches (I've seen many devs doing this). This is why I asked my question. – Tomoms Jun 2 '15 at 18:05
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    Just a suggestion: If you're modifying it, use a git clone instead. That should make your life much easier in general. – derobert Jun 2 '15 at 18:44
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Each patch in https://www.kernel.org/pub/linux/kernel/v3.x/ applies to the first release of the corresponding series, so you should apply https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.4.107.xz directly to your 3.4.0 source tree. Incremental patches are available, but they're stored separately, in https://www.kernel.org/pub/linux/kernel/v3.x/incr/; you would use these to patch an already-patched tree (e.g. if you want to upgrade your 3.4.107 tree to a future 3.4.108).

As derobert suggests, you'll find keeping up with kernel changes much easier if you work in a copy of the corresponding git stable repository; that will allow you to rebase your patches onto new releases as they come, and benefit from the merge tools available in that context.

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