xfern 2845 sound/core/pcm_native.c struct snd_xfern xfern; xfern 2856 sound/core/pcm_native.c if (copy_from_user(&xfern, _xfern, sizeof(xfern))) xfern 2859 sound/core/pcm_native.c bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels); xfern 2863 sound/core/pcm_native.c result = snd_pcm_lib_writev(substream, bufs, xfern.frames); xfern 2865 sound/core/pcm_native.c result = snd_pcm_lib_readv(substream, bufs, xfern.frames);