ALSA: pci: Constify snd_kcontrol_new items
Most of snd_kcontrol_new definitions are read-only and passed as-is.
Let's declare them as const for further optimization.
There should be no functional changes by this patch.
Link: https://lore.kernel.org/r/20200103081714.9560-38-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c
index ff55257..7f91742e 100644
--- a/sound/pci/cmipci.c
+++ b/sound/pci/cmipci.c
@@ -2256,7 +2256,7 @@ static int snd_cmipci_put_native_mixer_sensitive(struct snd_kcontrol *kcontrol,
}
-static struct snd_kcontrol_new snd_cmipci_mixers[] = {
+static const struct snd_kcontrol_new snd_cmipci_mixers[] = {
CMIPCI_SB_VOL_STEREO("Master Playback Volume", SB_DSP4_MASTER_DEV, 3, 31),
CMIPCI_MIXER_SW_MONO("3D Control - Switch", CM_REG_MIXER1, CM_X3DEN_SHIFT, 0),
CMIPCI_SB_VOL_STEREO("PCM Playback Volume", SB_DSP4_PCM_DEV, 3, 31),
@@ -2567,7 +2567,7 @@ static int snd_cmipci_mic_in_mode_put(struct snd_kcontrol *kcontrol,
}
/* both for CM8338/8738 */
-static struct snd_kcontrol_new snd_cmipci_mixer_switches[] = {
+static const struct snd_kcontrol_new snd_cmipci_mixer_switches[] = {
DEFINE_MIXER_SWITCH("Four Channel Mode", fourch),
{
.name = "Line-In Mode",
@@ -2579,11 +2579,11 @@ static struct snd_kcontrol_new snd_cmipci_mixer_switches[] = {
};
/* for non-multichannel chips */
-static struct snd_kcontrol_new snd_cmipci_nomulti_switch =
+static const struct snd_kcontrol_new snd_cmipci_nomulti_switch =
DEFINE_MIXER_SWITCH("Exchange DAC", exchange_dac);
/* only for CM8738 */
-static struct snd_kcontrol_new snd_cmipci_8738_mixer_switches[] = {
+static const struct snd_kcontrol_new snd_cmipci_8738_mixer_switches[] = {
#if 0 /* controlled in pcm device */
DEFINE_MIXER_SWITCH("IEC958 In Record", spdif_in),
DEFINE_MIXER_SWITCH("IEC958 Out", spdif_out),
@@ -2605,14 +2605,14 @@ static struct snd_kcontrol_new snd_cmipci_8738_mixer_switches[] = {
};
/* only for model 033/037 */
-static struct snd_kcontrol_new snd_cmipci_old_mixer_switches[] = {
+static const struct snd_kcontrol_new snd_cmipci_old_mixer_switches[] = {
DEFINE_MIXER_SWITCH("IEC958 Mix Analog", spdif_dac_out),
DEFINE_MIXER_SWITCH("IEC958 In Phase Inverse", spdi_phase),
DEFINE_MIXER_SWITCH("IEC958 In Select", spdif_in_sel1),
};
/* only for model 039 or later */
-static struct snd_kcontrol_new snd_cmipci_extra_mixer_switches[] = {
+static const struct snd_kcontrol_new snd_cmipci_extra_mixer_switches[] = {
DEFINE_MIXER_SWITCH("IEC958 In Select", spdif_in_sel2),
DEFINE_MIXER_SWITCH("IEC958 In Phase Inverse", spdi_phase2),
{
@@ -2625,14 +2625,14 @@ static struct snd_kcontrol_new snd_cmipci_extra_mixer_switches[] = {
};
/* card control switches */
-static struct snd_kcontrol_new snd_cmipci_modem_switch =
+static const struct snd_kcontrol_new snd_cmipci_modem_switch =
DEFINE_CARD_SWITCH("Modem", modem);
static int snd_cmipci_mixer_new(struct cmipci *cm, int pcm_spdif_device)
{
struct snd_card *card;
- struct snd_kcontrol_new *sw;
+ const struct snd_kcontrol_new *sw;
struct snd_kcontrol *kctl;
unsigned int idx;
int err;