pcm_call_notify   863 sound/core/pcm.c 		pcm_call_notify(pcm, n_unregister);
pcm_call_notify  1079 sound/core/pcm.c 	pcm_call_notify(pcm, n_register);
pcm_call_notify  1112 sound/core/pcm.c 	pcm_call_notify(pcm, n_disconnect);