linux-kernel - Re: [PATCH v1 1/1] Makefile.extrawarn: Turn off -Werror when extra warnings are enabled

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Date:   Fri, 25 Mar 2022 10:18:06 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v1 1/1] Makefile.extrawarn: Turn off -Werror when extra
 warnings are enabled

On Fri, Mar 25, 2022 at 6:13 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> +#
> +# Turn off -Werror when extra warnings are enabled
> +#
> +ifneq ($(KBUILD_EXTRA_WARN),)
> +       KBUILD_CFLAGS += -Wno-error
> +endif

NAK.

If you enabled CONFIG_WERROR, then you get CONFIG_WERROR.

If you enabled W=1, then you get extra warnings.

If you enabled both, then you get extra warnings and they are errors.

This patch is just stupid.

              Linus