snd_pcm_plugin_build_io 940 sound/core/oss/pcm_oss.c if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { snd_pcm_plugin_build_io 100 sound/core/oss/pcm_plugin.h int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle,