CONFIG_UNUSED_SYMBOLS: Enable unused/obsolete exported symbols

General informations

The Linux kernel configuration item CONFIG_UNUSED_SYMBOLS has multiple definitions:

Enable unused/obsolete exported symbols found in init/Kconfig

The configuration item CONFIG_UNUSED_SYMBOLS:

• prompt: Enable unused/obsolete exported symbols
• type: bool
• depends on: CONFIG_X86
• defined in init/Kconfig
• found in Linux kernels: 5.4–5.11

Help text

Unused but exported symbols make the kernel needlessly bigger. For that reason most of these unused exports will soon be removed. This option is provided temporarily to provide a transition period in case some external kernel module needs one of these symbols anyway. If you encounter such a case in your module, consider if you are actually using the right API. (rationale: since nobody in the kernel is using this in a module, there is a pretty good chance it's actually the wrong interface to use). If you really need the symbol, please send a mail to the linux kernel mailing list mentioning the symbol and why you really need it, and what the merge plan to the mainline kernel for your module is.

Enable unused/obsolete exported symbols found in lib/Kconfig.debug

The configuration item CONFIG_UNUSED_SYMBOLS:

• prompt: Enable unused/obsolete exported symbols
• type: bool
• depends on: CONFIG_X86
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.18–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.3

Help text

Unused but exported symbols make the kernel needlessly bigger. For that reason most of these unused exports will soon be removed. This option is provided temporarily to provide a transition period in case some external kernel module needs one of these symbols anyway. If you encounter such a case in your module, consider if you are actually using the right API. (rationale: since nobody in the kernel is using this in a module, there is a pretty good chance it's actually the wrong interface to use). If you really need the symbol, please send a mail to the linux kernel mailing list mentioning the symbol and why you really need it, and what the merge plan to the mainline kernel for your module is.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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