DMAbuf_getwrbuffer 252 sound/oss/audio.c if ((err = DMAbuf_getwrbuffer(dev, &dma_buf, &buf_size, !!(file->f_flags & O_NONBLOCK))) < 0) DMAbuf_getwrbuffer 7 sound/oss/sound_calls.h int DMAbuf_getwrbuffer(int dev, char **buf, int *size, int dontblock);