linux-kernel - Re: [PATCH v2] zlib: Mark get_unaligned16() as __maybe

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Message-ID: <20170522182738.GK141096@google.com>
Date:   Mon, 22 May 2017 11:27:38 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2] zlib: Mark get_unaligned16() as __maybe_unused

El Mon, May 22, 2017 at 04:57:30PM +0800 kbuild test robot ha dit:

> Hi Matthias,
> 
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.12-rc2 next-20170522]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Matthias-Kaehlcke/zlib-Mark-get_unaligned16-as-__maybe_unused/20170522-112401
> config: powerpc-maple_defconfig (attached as .config)
> compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
>         wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=powerpc 
> 
> All errors (new ones prefixed by >>):
> 
> >> arch/powerpc/boot/inffast.c:6:22: fatal error: compiler.h: No such file or directory
>     #include "compiler.h"
>                          ^
>    compilation terminated.

I was convinced I build tested this, but I can reproduce the error. I
guess we have to use the bare __attribute__((unused)) :/