CONFIG_PREVENT_FIRMWARE_BUILD: Disable drivers features which enable custom firmware building

General informations

The Linux kernel configuration item CONFIG_PREVENT_FIRMWARE_BUILD has multiple definitions:

Disable drivers features which enable custom firmware building found in drivers/base/Kconfig

The configuration item CONFIG_PREVENT_FIRMWARE_BUILD:

• prompt: Disable drivers features which enable custom firmware building
• type: bool
• depends on: (none)
• defined in drivers/base/Kconfig
• found in Linux kernels: 4.18–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

Say yes to disable driver features which enable building a custom driver firmware at kernel build time. These drivers do not use the kernel firmware API to load firmware (FW_LOADER), instead they use their own custom loading mechanism. The required firmware is usually shipped with the driver, building the driver firmware should only be needed if you have an updated firmware source.

Firmware should not be being built as part of kernel, these days you should always prevent this and say Y here. There are only two old drivers which enable building of its firmware at kernel build time:

o WANXL through WANXL_BUILD_FIRMWARE o SCSI_AIC79XX through AIC79XX_BUILD_FIRMWARE

Prevent firmware from being built found in drivers/base/Kconfig

The configuration item CONFIG_PREVENT_FIRMWARE_BUILD:

• prompt: Prevent firmware from being built
• type: bool
• depends on: (none)
• defined in drivers/base/Kconfig
• found in Linux kernels: 2.6.8–2.6.39, 3.0–3.19, 4.0–4.17

Help text

Say yes to avoid building firmware. Firmware is usually shipped with the driver and only when updating the firmware should a rebuild be made. If unsure, say Y here.

Hardware

LKDDb

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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