linux-kernel - Re: [RESEND PATCH v1] x86/build: add -fno-builtin flag to prevent shadowing

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Message-ID: <CAKwvOdniSVMOwkBke2EcgONn_Vmv88M+B2FTYL_BKtWawCSLAw@mail.gmail.com>
Date:   Mon, 9 May 2022 12:50:01 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Vincent MAILHOL <mailhol.vincent@...adoo.fr>
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Arnd Bergmann <arnd@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <llvm@...ts.linux.dev>,
        Tom Rix <trix@...hat.com>, Kees Cook <keescook@...omium.org>
Subject: Re: [RESEND PATCH v1] x86/build: add -fno-builtin flag to prevent shadowing

On Mon, May 9, 2022 at 8:01 AM Vincent MAILHOL
<mailhol.vincent@...adoo.fr> wrote:
>
> Instead, I am thinking of just using -fno-builtin-ffs to remove
> the annoying -Wshadow warning. Would that make more sense?

Perhaps a pragma would be the best tool to silence this instance of
-Wshadow?  I understand what GCC is trying to express, but the kernel
does straddle a weird place between -ffreestanding and a "hosted" env.
-- 
Thanks,
~Nick Desaulniers