/* PCM part */
/* PCM hardware definition */
-static struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
+static const struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |