linux-kernel - Re: include/uapi/sound/asound.h:562:14: error: conflicting types for '__pad_before

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Message-ID: <CAK8P3a1DKu4YyAFY_kFjietDj=kcP=5FqCnE+hn_0m1O3PCUyg@mail.gmail.com>
Date:   Tue, 3 Nov 2020 10:57:20 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Arnd Bergmann <arnd@...db.de>, kbuild-all@...ts.01.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Baolin Wang <baolin.wang@...aro.org>,
        "open list:RALINK MIPS ARCHITECTURE" <linux-mips@...ux-mips.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: Re: include/uapi/sound/asound.h:562:14: error: conflicting types for '__pad_before_uframe'

On Mon, Nov 2, 2020 at 3:15 PM kernel test robot <lkp@...el.com> wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   3cea11cd5e3b00d91caf0b4730194039b45c5891
> commit: 80fe7430c7085951d1246d83f638cc17e6c0be36 ALSA: add new 32-bit layout for snd_pcm_mmap_status/control
> date:   11 months ago
> config: mips-randconfig-r006-20201102 (attached as .config)
> compiler: mips-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=80fe7430c7085951d1246d83f638cc17e6c0be36
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 80fe7430c7085951d1246d83f638cc17e6c0be36
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>    In file included from arch/mips/include/uapi/asm/byteorder.h:13,
>                     from arch/mips/include/asm/bitops.h:20,
>                     from include/linux/bitops.h:26,
>                     from include/linux/kernel.h:12,
>                     from include/asm-generic/bug.h:19,
>                     from arch/mips/include/asm/bug.h:42,
>                     from include/linux/bug.h:5,
>                     from include/linux/mmdebug.h:5,
>                     from include/linux/gfp.h:5,
>                     from include/linux/slab.h:15,
>                     from sound/core/oss/pcm_oss.c:15:
>    include/linux/byteorder/big_endian.h:8:2: warning: #warning inconsistent configuration, needs CONFIG_CPU_BIG_ENDIAN [-Wcpp]
>        8 | #warning inconsistent configuration, needs CONFIG_CPU_BIG_ENDIAN
>          |  ^~~~~~~
>    In file included from include/sound/asound.h:24,
>                     from include/sound/pcm.h:11,
>                     from sound/core/oss/pcm_oss.c:25:
> >> include/uapi/sound/asound.h:562:14: error: conflicting types for '__pad_before_uframe'
>      562 | typedef char __pad_before_uframe[0];
>          |              ^~~~~~~~~~~~~~~~~~~
>    include/uapi/sound/asound.h:557:14: note: previous declaration of '__pad_before_uframe' was here
>      557 | typedef char __pad_before_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
>          |              ^~~~~~~~~~~~~~~~~~~

This is unrelated to my patch, and a preexisting problem with the jazz platform
when no specific machine is selected and neither big-endian nor little-endian
CPUs are enabled. Since all three machines do allow little-endian kernels,
selecting that option one level higher fixes the problem.

Signed-off-by: Arnd Bergmann <arnd@...db.de>

--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -406,6 +406,7 @@ config MACH_JAZZ
        select SYS_SUPPORTS_32BIT_KERNEL
        select SYS_SUPPORTS_64BIT_KERNEL
        select SYS_SUPPORTS_100HZ
+       select SYS_SUPPORTS_LITTLE_ENDIAN
        help
          This a family of machines based on the MIPS R4030 chipset which was
          used by several vendors to build RISC/os and Windows NT workstations.