diff --git a/sound/soc/sti/sti_uniperif.c b/sound/soc/sti/sti_uniperif.c
index 749e6b294184..83a301f2aa66 100644
--- a/sound/soc/sti/sti_uniperif.c
+++ b/sound/soc/sti/sti_uniperif.c
@@ -14,7 +14,7 @@
  * This function is used to create Ctrl associated to DAI but also pcm device.
  * Request is done by front end to associate ctrl with pcm device id
  */
-int sti_uniperiph_dai_create_ctrl(struct snd_soc_dai *dai)
+static int sti_uniperiph_dai_create_ctrl(struct snd_soc_dai *dai)
 {
 	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
 	struct uniperif *uni = priv->dai_data.uni;
diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c
index d990d2c81a5d..f609089a6e00 100644
--- a/sound/soc/sti/uniperif_player.c
+++ b/sound/soc/sti/uniperif_player.c
@@ -43,7 +43,7 @@
  * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
  * integrate  DAI_CPU capability in term of rate and supported channels
  */
-const struct snd_pcm_hardware uni_player_pcm_hw = {
+static const struct snd_pcm_hardware uni_player_pcm_hw = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
 		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
 		SNDRV_PCM_INFO_MMAP_VALID,
@@ -175,7 +175,7 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
 	return ret;
 }
 
-int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
+static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
 {
 	int rate_adjusted, rate_achieved, delta, ret;
 	int adjustment = player->clk_adj;
diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c
index 7d83827ba660..c502626f339b 100644
--- a/sound/soc/sti/uniperif_reader.c
+++ b/sound/soc/sti/uniperif_reader.c
@@ -17,7 +17,7 @@
  * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
  * integrate unireader capability in term of rate and supported channels
  */
-const struct snd_pcm_hardware uni_reader_pcm_hw = {
+static const struct snd_pcm_hardware uni_reader_pcm_hw = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
 		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
 		SNDRV_PCM_INFO_MMAP_VALID,
@@ -324,7 +324,7 @@ static int uni_reader_parse_dt(struct platform_device *pdev,
 	return 0;
 }
 
-const struct snd_soc_dai_ops uni_reader_dai_ops = {
+static const struct snd_soc_dai_ops uni_reader_dai_ops = {
 		.shutdown = uni_reader_shutdown,
 		.prepare = uni_reader_prepare,
 		.trigger = uni_reader_trigger,