[PATCH 02/15] ARM: limit OABI support to StrongARM CPUs

[Linus Walleij]

On Wed, Dec 4, 2024 at 11:29 AM Arnd Bergmann <arnd at kernel.org> wrote:

> From: Arnd Bergmann <arnd at arndb.de>
>
> As discussed on the mailing lists, there is no way to build OABI userspace
> binaries any more since gcc-4.8, and now support is also getting dropped in
> binutils, which will make it impossible to build pure OABI kernels at some
> point in the future.
>
> I found no evidence of anyone still sing OABI userspace on embedded systems
> that keep getting kernel updates, but there are a few desktop-class machines
> that date back to the 1990s using Intel StrongARM processors that were
> supported by old versions of Debian, Red Hat or the official Corel
> Netwinder distribution.
>
> Add a much stricter Kconfig dependency for both native OABI and OABI_COMPAT
> enabled kernels, only allowing either of them to be selected when building
> a kernel that targets a StrongARM based machine.
>
> Link: https://lore.kernel.org/lkml/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

For
>  arch/arm/configs/versatile_defconfig   |  1 -

Acked-by: Linus Walleij <linus.walleij at linaro.org>


> diff --git a/arch/arm/configs/footbridge_defconfig b/arch/arm/configs/footbridge_defconfig
(...)
>  CONFIG_ARCH_NETWINDER=y
> +# CONFIG_AEABI is not set
>  CONFIG_FPE_NWFPE=y
>  CONFIG_FPE_NWFPE_XP=y
> -# CONFIG_AEABI is not set

Hm why do we need a separate netwinder_defconfig if this defconfig already
supports it?

I am occasionally booting the NetWinder and then I use this defconfig,
the netwinder_defconfig wasn't even working for me.

Do you want to propose a separate patch to delete netwinder_defconfig,
otherwise I can send one. I think everyone (which is like ... 3 people) are
using footbridge_defconfig.

Yours,
Linus Walleij