snd_pcm_group 372 include/sound/pcm.h struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ snd_pcm_group 373 include/sound/pcm.h struct snd_pcm_group *group; /* pointer to current group */ snd_pcm_group 1612 sound/core/pcm_native.c substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);