pcm_playback_efx_substream 1767 include/sound/emu10k1.h 	struct snd_pcm_substream *pcm_playback_efx_substream;
pcm_playback_efx_substream 1104 sound/pci/emu10k1/emupcm.c 	emu->pcm_playback_efx_substream = substream;