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doc: remove misleading kernel.features explanation

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At this point kernel.features is more of an implementation detail and
normal users should not come into contact with it.
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Julian Stecklina 2023-12-02 15:31:03 +01:00 committed by Alyssa Ross
parent 3581265259
commit 1b7e43471f
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doc/packages/linux.section.md
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@ -12,20 +12,6 @@ Both functions have an argument `kernelPatches` which should be a list of `{name
The kernel derivation created with `pkgs.buildLinux` exports an attribute `features` specifying whether optional functionality is or isn’t enabled. This is used in NixOS to implement kernel-specific behaviour. The kernel derivation created with `pkgs.buildLinux` exports an attribute `features` specifying whether optional functionality is or isn’t enabled. This is used in NixOS to implement kernel-specific behaviour.
:::{.example #ex-skip-package-from-kernel-feature}
# Skipping an external package because of a kernel feature
For instance, if the kernel has the `iwlwifi` feature (i.e., has built-in support for Intel wireless chipsets), then NixOS doesn’t have to build the external `iwlwifi` package:
```nix
modulesTree = [kernel]
++ pkgs.lib.optional (!kernel.features ? iwlwifi) kernelPackages.iwlwifi
++ ...;
```
:::
If you are using a kernel packaged in Nixpkgs, you can customize it by overriding its arguments. For details on how each argument affects the generated kernel, refer to [the `pkgs.buildLinux` source code](https://github.com/NixOS/nixpkgs/blob/d77bda728d5041c1294a68fb25c79e2d161f62b9/pkgs/os-specific/linux/kernel/generic.nix). If you are using a kernel packaged in Nixpkgs, you can customize it by overriding its arguments. For details on how each argument affects the generated kernel, refer to [the `pkgs.buildLinux` source code](https://github.com/NixOS/nixpkgs/blob/d77bda728d5041c1294a68fb25c79e2d161f62b9/pkgs/os-specific/linux/kernel/generic.nix).
:::{.example #ex-overriding-kernel-derivation} :::{.example #ex-overriding-kernel-derivation}