linux-kernel - Re: [PATCH 8/8] ALSA: add new 32-bit layout for snd_pcm_mmap

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Date:   Thu, 26 Apr 2018 13:31:17 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     kbuild test robot <lkp@...el.com>
Cc:     Baolin Wang <baolin.wang@...aro.org>, kbuild-all@...org,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Takashi Sakamoto <o-takashi@...amocchi.jp>,
        Ingo Molnar <mingo@...nel.org>,
        SF Markus Elfring <elfring@...rs.sourceforge.net>,
        Dan Carpenter <dan.carpenter@...cle.com>, jeeja.kp@...el.com,
        Vinod Koul <vinod.koul@...el.com>,
        Guneshwor Singh <guneshwor.o.singh@...el.com>,
        subhransu.s.prusty@...el.com, Bhumika Goyal <bhumirks@...il.com>,
        gudishax.kranthikumar@...el.com, Naveen M <naveen.m@...el.com>,
        hardik.t.shah@...el.com, Arvind Yadav <arvind.yadav.cs@...il.com>,
        Fabian Frederick <fabf@...net.be>, alsa-devel@...a-project.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 8/8] ALSA: add new 32-bit layout for snd_pcm_mmap_status/control

On Thu, Apr 26, 2018 at 1:25 PM, kbuild test robot <lkp@...el.com> wrote:
> Hi Arnd,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on v4.17-rc2]
> [cannot apply to sound/for-next asoc/for-next arm-soc/for-next next-20180426]
> [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/Baolin-Wang/Fix-year-2038-issue-for-sound-subsystem/20180426-010145
> reproduce:
>         # apt-get install sparse
>         make ARCH=x86_64 allmodconfig
>         make C=1 CF=-D__CHECK_ENDIAN__
>
>
> sparse warnings: (new ones prefixed by >>)
>
>    sound/firewire/motu/motu-pcm.c:35:29: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:35:29: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:36:29: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:36:29: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:65:32: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:65:32: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:66:32: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:66:32: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:92:36: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:92:36: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:93:36: sparse: expression using sizeof(void)
>    sound/firewire/motu/motu-pcm.c:93:36: sparse: expression using sizeof(void)
>>> sound/firewire/motu/motu-pcm.c:204:50: sparse: restricted snd_pcm_state_t degrades to integer
>    sound/firewire/motu/motu-pcm.c:223:50: sparse: restricted snd_pcm_state_t degrades to integer
>    sound/firewire/motu/motu-pcm.c:238:50: sparse: restricted snd_pcm_state_t degrades to integer
>    sound/firewire/motu/motu-pcm.c:254:50: sparse: restricted snd_pcm_state_t degrades to integer

>From what I can tell, these are all existing driver problems, no idea why we now
have one more warning than before.

       Arnd