[PATCH v3] kbuild: Show marked Kconfig fragments in "help"

[Michael Ellerman]

Kees Cook <keescook at chromium.org> writes:
> Currently the Kconfig fragments in kernel/configs and arch/*/configs
> that aren't used internally aren't discoverable through "make help",
> which consists of hard-coded lists of config fragments. Instead, list
> all the fragment targets that have a "# Help: " comment prefix so the
> targets can be generated dynamically.
>
> Add logic to the Makefile to search for and display the fragment and
> comment. Add comments to fragments that are intended to be direct targets.
>
> Cc: Nicolas Schier <nicolas at fjasle.eu>
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: Christophe Leroy <christophe.leroy at csgroup.eu>
> Cc: Randy Dunlap <rdunlap at infradead.org>
> Cc: linux-kernel at vger.kernel.org
> Cc: x86 at kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linuxppc-dev at lists.ozlabs.org
> Cc: linux-riscv at lists.infradead.org
> Cc: linux-s390 at vger.kernel.org
> Cc: linux-kbuild at vger.kernel.org
> Cc: linux-hardening at vger.kernel.org
> Signed-off-by: Kees Cook <keescook at chromium.org>
> Co-developed-by: Masahiro Yamada <masahiroy at kernel.org>
> ---
> v3:
> - Use Makefile logic from Masahiro Yamada
> - Use "# Help: " prefix, but only on desired fragment targets
> v2: https://lore.kernel.org/all/20230825194329.gonna.911-kees@kernel.org
> v1: https://lore.kernel.org/all/20230824223606.never.762-kees@kernel.org
> ---
>  Makefile                                   |  1 -
>  arch/arm/configs/dram_0x00000000.config    |  1 +
>  arch/arm/configs/dram_0xc0000000.config    |  1 +
>  arch/arm/configs/dram_0xd0000000.config    |  1 +
>  arch/arm/configs/lpae.config               |  1 +
>  arch/arm64/configs/virt.config             |  1 +
>  arch/powerpc/configs/disable-werror.config |  1 +
>  arch/powerpc/configs/security.config       |  4 +++-
  
Acked-by: Michael Ellerman <mpe at ellerman.id.au> (powerpc)

cheers