[PATCH v2] Compiler Attributes: remove CONFIG_ENABLE_MUST_CHECK

[Jason A. Donenfeld]

On Sat, Nov 28, 2020 at 9:48 AM Masahiro Yamada <masahiroy at kernel.org> wrote:
>
> Revert commit cebc04ba9aeb ("add CONFIG_ENABLE_MUST_CHECK").
>
> A lot of warn_unused_result wearings existed in 2006, but until now
> they have been fixed thanks to people doing allmodconfig tests.
>
> Our goal is to always enable __must_check where appropriate, so this
> CONFIG option is no longer needed.
>
> I see a lot of defconfig (arch/*/configs/*_defconfig) files having:
>
>     # CONFIG_ENABLE_MUST_CHECK is not set
>
> I did not touch them for now since it would be a big churn. If arch
> maintainers want to clean them up, please go ahead.
>
> While I was here, I also moved __must_check to compiler_attributes.h
> from compiler_types.h

For the wireguard test harness change:

Acked-by: Jason A. Donenfeld <Jason at zx2c4.com>