docs: add how-to for rebuilding a single kernel module#113
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Migrates and modernises the content from the deprecated Ubuntu wiki page at https://wiki.ubuntu.com/Kernel/Dev/KernelModuleRebuild into the kernel-docs how-to structure. Changes from the original wiki content: - Replace the deprecated SUBDIRS= make parameter with the current M= form (SUBDIRS was removed in Linux 3.8; M= / KBUILD_EXTMOD is the correct modern equivalent). - Add a 'make O=... M=scripts' step that produces the scripts/mod/ helpers required for building external modules. - Add explicit modprobe -r / modprobe load-and-test steps. - Add a note guiding readers toward DKMS for sustained cross-upgrade use. - Format the guide consistently with the MyST/Sphinx conventions used elsewhere in kernel-docs (code-block directives, note/important admonitions, cross-references to related pages). The new page is placed at how-to/develop-customise/build-kernel-module.md, alongside the existing build-kernel.md and build-kernel-snap.md guides, and is linked into the toctree and body of how-to/index.md. Signed-off-by: Tim Whisonant <tim.whisonant@canonical.com>
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Migrates and modernises the content from the deprecated Ubuntu wiki page at https://wiki.ubuntu.com/Kernel/Dev/KernelModuleRebuild into the kernel-docs how-to structure.
Changes from the original wiki content:
The new page is placed at how-to/develop-customise/build-kernel-module.md, alongside the existing build-kernel.md and build-kernel-snap.md guides, and is linked into the toctree and body of how-to/index.md.