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@intel.com

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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