linux-kernel - Re: [PATCH] ARM: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer

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Message-Id: <a40df1e3-ed92-4662-bb9e-106becce63d7@app.fastmail.com>
Date:   Mon, 30 Jan 2023 19:19:28 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "kernel test robot" <lkp@...el.com>,
        "Nathan Chancellor" <nathan@...nel.org>,
        "Russell King" <linux@...linux.org.uk>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        "Nick Desaulniers" <ndesaulniers@...gle.com>,
        "Tom Rix" <trix@...hat.com>, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: Re: [PATCH] ARM: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer

On Mon, Jan 30, 2023, at 19:10, kernel test robot wrote:
> Hi Nathan,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on 5dc4c995db9eb45f6373a956eb1f69460e69e6d4]
>
> url:    
> https://github.com/intel-lab-lkp/linux/commits/Nathan-Chancellor/ARM-Allow-pre-ARMv5-builds-with-ld-lld-16-0-0-and-newer/20230119-032402
> base:   5dc4c995db9eb45f6373a956eb1f69460e69e6d4
>>> arch/arm/mach-sa1100/pm.c:122:12: warning: no previous prototype for function 'sa11x0_pm_init' [-Wmissing-prototypes]
>    int __init sa11x0_pm_init(void)
>               ^
>    arch/arm/mach-sa1100/pm.c:122:1: note: declare 'static' if the 
> function is not intended to be used outside of this translation unit
>    int __init sa11x0_pm_init(void)
>    ^
>    static 
>    1 warning generated.
> --


For refernece, these are all known problems, the patch just allowed
the code to be built by clang/lld when that was previously not
possible.

After the 6.3 merge window, we can probably go through the much
smaller set of board files are address most of the W=1 warnings that
were previously overwhelming.

      Arnd