[chrome-os:chromeos-4.4 16/34] sound/soc/codecs/max98357a.c:47:3: error: implicit declaration of function 'mdelay'

[chrome-os:chromeos-4.4 16/34] sound/soc/codecs/max98357a.c:47:3: error: implicit declaration of function 'mdelay'

[kernel test robot]

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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@intel.com>

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':
>> sound/soc/codecs/max98357a.c:47:3: error: implicit declaration of function 'mdelay' [-Werror=implicit-function-declaration]
      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:
  > 47			mdelay(max98357a->sdmode_delay);
    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(a)lists.01.org

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