return change;
 }
 
-static struct snd_kcontrol_new snd_gus_joystick_control = {
+static const struct snd_kcontrol_new snd_gus_joystick_control = {
        .iface = SNDRV_CTL_ELEM_IFACE_CARD,
        .name = "Joystick Speed",
        .info = snd_gus_joystick_info,
 
        return change;
 }
 
-static struct snd_kcontrol_new snd_gf1_pcm_volume_control =
+static const struct snd_kcontrol_new snd_gf1_pcm_volume_control =
 {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "PCM Playback Volume",
        .put = snd_gf1_pcm_volume_put
 };
 
-static struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
+static const struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
 {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "GPCM Playback Volume",
 
        return change;
 }
 
-static struct snd_kcontrol_new snd_sb_qsound_switch = {
+static const struct snd_kcontrol_new snd_sb_qsound_switch = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "3D Control - Switch",
        .info = snd_sb_qsound_switch_info,
        .put = snd_sb_qsound_switch_put
 };
 
-static struct snd_kcontrol_new snd_sb_qsound_space = {
+static const struct snd_kcontrol_new snd_sb_qsound_space = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "3D Control - Space",
        .info = snd_sb_qsound_space_info,
 
        return change;
 }
 
-static struct snd_kcontrol_new snd_sb16_dma_control = {
+static const struct snd_kcontrol_new snd_sb16_dma_control = {
        .iface = SNDRV_CTL_ELEM_IFACE_CARD,
        .name = "16-bit DMA Allocation",
        .info = snd_sb16_dma_control_info,
 
        return change;
 }
 
-static struct snd_kcontrol_new midi_mixer_ctl = {
+static const struct snd_kcontrol_new midi_mixer_ctl = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "MIDI",
        .info = sscape_midi_info,