[sound:for-next 127/148] sound/drivers/aloop.c:313: undefined reference to `snd_timer_close'

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
head:   9314e44f455c8b46d08b2d379cb9e8fba5767207
commit: 26c53379f98d22d6a3e50bb146651dc7824334d7 [127/148] ALSA: aloop: Support selection of snd_timer instead of jiffies
config: i386-randconfig-f001-20191124 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        git checkout 26c53379f98d22d6a3e50bb146651dc7824334d7
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   ld: sound/drivers/aloop.o: in function `loopback_snd_timer_close_cable':
>> sound/drivers/aloop.c:313: undefined reference to `snd_timer_close'
>> ld: sound/drivers/aloop.c:314: undefined reference to `snd_timer_instance_free'
   ld: sound/drivers/aloop.o: in function `loopback_snd_timer_stop':
>> sound/drivers/aloop.c:276: undefined reference to `snd_timer_stop'
   ld: sound/drivers/aloop.o: in function `loopback_snd_timer_start':
>> sound/drivers/aloop.c:237: undefined reference to `snd_timer_start'
   ld: sound/drivers/aloop.o: in function `loopback_snd_timer_open':
>> sound/drivers/aloop.c:1129: undefined reference to `snd_timer_instance_new'
>> ld: sound/drivers/aloop.c:1164: undefined reference to `snd_timer_open'
   ld: sound/drivers/aloop.c:1173: undefined reference to `snd_timer_instance_free'

vim +313 sound/drivers/aloop.c

   227	
   228	/* call in cable->lock */
   229	static int loopback_snd_timer_start(struct loopback_pcm *dpcm)
   230	{
   231		struct loopback_cable *cable = dpcm->cable;
   232		int err;
   233	
   234		/* Loopback device has to use same period as timer card. Therefore
   235		 * wake up for each snd_pcm_period_elapsed() call of timer card.
   236		 */
 > 237		err = snd_timer_start(cable->snd_timer.instance, 1);
   238		if (err < 0) {
   239			/* do not report error if trying to start but already
   240			 * running. For example called by opposite substream
   241			 * of the same cable
   242			 */
   243			if (err == -EBUSY)
   244				return 0;
   245	
   246			pcm_err(dpcm->substream->pcm,
   247				"snd_timer_start(%d,%d,%d) failed with %d",
   248				cable->snd_timer.id.card,
   249				cable->snd_timer.id.device,
   250				cable->snd_timer.id.subdevice,
   251				err);
   252		}
   253	
   254		return err;
   255	}
   256	
   257	/* call in cable->lock */
   258	static inline int loopback_jiffies_timer_stop(struct loopback_pcm *dpcm)
   259	{
   260		del_timer(&dpcm->timer);
   261		dpcm->timer.expires = 0;
   262	
   263		return 0;
   264	}
   265	
   266	/* call in cable->lock */
   267	static int loopback_snd_timer_stop(struct loopback_pcm *dpcm)
   268	{
   269		struct loopback_cable *cable = dpcm->cable;
   270		int err;
   271	
   272		/* only stop if both devices (playback and capture) are not running */
   273		if (cable->running ^ cable->pause)
   274			return 0;
   275	
 > 276		err = snd_timer_stop(cable->snd_timer.instance);
   277		if (err < 0) {
   278			pcm_err(dpcm->substream->pcm,
   279				"snd_timer_stop(%d,%d,%d) failed with %d",
   280				cable->snd_timer.id.card,
   281				cable->snd_timer.id.device,
   282				cable->snd_timer.id.subdevice,
   283				err);
   284		}
   285	
   286		return err;
   287	}
   288	
   289	static inline int loopback_jiffies_timer_stop_sync(struct loopback_pcm *dpcm)
   290	{
   291		del_timer_sync(&dpcm->timer);
   292	
   293		return 0;
   294	}
   295	
   296	/* call in loopback->cable_lock */
   297	static int loopback_snd_timer_close_cable(struct loopback_pcm *dpcm)
   298	{
   299		struct loopback_cable *cable = dpcm->cable;
   300	
   301		/* snd_timer was not opened */
   302		if (!cable->snd_timer.instance)
   303			return 0;
   304	
   305		/* wait till drain tasklet has finished if requested */
   306		tasklet_kill(&cable->snd_timer.event_tasklet);
   307	
   308		/* will only be called from free_cable() when other stream was
   309		 * already closed. Other stream cannot be reopened as long as
   310		 * loopback->cable_lock is locked. Therefore no need to lock
   311		 * cable->lock;
   312		 */
 > 313		snd_timer_close(cable->snd_timer.instance);
 > 314		snd_timer_instance_free(cable->snd_timer.instance);
   315		memset(&cable->snd_timer, 0, sizeof(cable->snd_timer));
   316	
   317		return 0;
   318	}
   319	

---
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