tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.4 head: 54c764fdd34196bcea7e02985cac4e4dc801593e commit: 544bc70072f2f0d2d0aeee6999a00b1bfcd47b4a [16/34] BACKPORT: UPSTREAM: ASoC: max98357a: use mdelay for sdmode-delay config: nios2-allyesconfig (attached as .config) compiler: nios2-linux-gcc (GCC) 7.5.0 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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-4.4 git checkout 544bc70072f2f0d2d0aeee6999a00b1bfcd47b4a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross W=1 ARCH=nios2 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the chrome-os/chromeos-4.4 HEAD 54c764fdd34196bcea7e02985cac4e4dc801593e builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): In file included from sound/soc/codecs/max98357a.c:25:0: include/sound/pcm.h: In function 'snd_pcm_chmap_substream': include/sound/pcm.h:1372:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s->number == idx) ^~ sound/soc/codecs/max98357a.c: In function 'max98357a_daiops_trigger': mdelay(max98357a->sdmode_delay); ^~~~~~ cc1: some warnings being treated as errors vim +/mdelay +47 sound/soc/codecs/max98357a.c 34 35 static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, 36 int cmd, struct snd_soc_dai *dai) 37 { 38 struct max98357a_priv *max98357a = snd_soc_dai_get_drvdata(dai); 39 40 if (!max98357a->sdmode) 41 return 0; 42 43 switch (cmd) { 44 case SNDRV_PCM_TRIGGER_START: 45 case SNDRV_PCM_TRIGGER_RESUME: 46 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 48 gpiod_set_value(max98357a->sdmode, 1); 49 break; 50 case SNDRV_PCM_TRIGGER_STOP: 51 case SNDRV_PCM_TRIGGER_SUSPEND: 52 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 53 gpiod_set_value(max98357a->sdmode, 0); 54 break; 55 } 56 57 return 0; 58 } 59 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org