snd_pcm_lib_preallocate_free 1178 include/sound/pcm.h void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
snd_pcm_lib_preallocate_free   94 sound/core/pcm_memory.c 			snd_pcm_lib_preallocate_free(substream);