[PATCH] ASoC: tegra: fix build warning

[Bixuan Cui]

The following function may have no callers, so they're marked
__maybe_unused to avoid warning:

sound/soc/tegra/tegra30_i2s.c:50:12: warning: ‘tegra30_i2s_runtime_resume’ defined but not used [-Wunused-function]
 static int tegra30_i2s_runtime_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
sound/soc/tegra/tegra30_i2s.c:39:12: warning: ‘tegra30_i2s_runtime_suspend’ defined but not used [-Wunused-function]
 static int tegra30_i2s_runtime_suspend(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/soc/tegra/tegra20_i2s.c:48:12: warning: ‘tegra20_i2s_runtime_resume’ defined but not used [-Wunused-function]
 static int tegra20_i2s_runtime_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
sound/soc/tegra/tegra20_i2s.c:37:12: warning: ‘tegra20_i2s_runtime_suspend’ defined but not used [-Wunused-function]
 static int tegra20_i2s_runtime_suspend(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/soc/tegra/tegra30_ahub.c:64:12: warning: ‘tegra30_ahub_runtime_resume’ defined but not used [-Wunused-function]
 static int tegra30_ahub_runtime_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
sound/soc/tegra/tegra30_ahub.c:43:12: warning: ‘tegra30_ahub_runtime_suspend’ defined but not used [-Wunused-function]
 static int tegra30_ahub_runtime_suspend(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 82ef0ae46b86 ('ASoC: tegra: add runtime PM support')
Fixes: be944d42ccc1 ('ASoC: tegra: add tegra30-ahub driver')
Fixes: 4fb0384f3dc6 ('ASoC: tegra: add tegra30-i2s driver')

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Bixuan Cui <cuibixuan@xxxxxxxxxx>
---
 sound/soc/tegra/tegra20_i2s.c  | 4 ++--
 sound/soc/tegra/tegra30_ahub.c | 4 ++--
 sound/soc/tegra/tegra30_i2s.c  | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/sound/soc/tegra/tegra20_i2s.c b/sound/soc/tegra/tegra20_i2s.c
index 1b27f81c10fe..b280ebd72591 100644
--- a/sound/soc/tegra/tegra20_i2s.c
+++ b/sound/soc/tegra/tegra20_i2s.c
@@ -34,7 +34,7 @@
 
 #define DRV_NAME "tegra20-i2s"
 
-static int tegra20_i2s_runtime_suspend(struct device *dev)
+static __maybe_unused int tegra20_i2s_runtime_suspend(struct device *dev)
 {
 	struct tegra20_i2s *i2s = dev_get_drvdata(dev);
 
@@ -45,7 +45,7 @@ static int tegra20_i2s_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra20_i2s_runtime_resume(struct device *dev)
+static __maybe_unused int tegra20_i2s_runtime_resume(struct device *dev)
 {
 	struct tegra20_i2s *i2s = dev_get_drvdata(dev);
 	int ret;
diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
index d1718f3af3cd..4692c70ed933 100644
--- a/sound/soc/tegra/tegra30_ahub.c
+++ b/sound/soc/tegra/tegra30_ahub.c
@@ -40,7 +40,7 @@ static inline void tegra30_audio_write(u32 reg, u32 val)
 	regmap_write(ahub->regmap_ahub, reg, val);
 }
 
-static int tegra30_ahub_runtime_suspend(struct device *dev)
+static __maybe_unused int tegra30_ahub_runtime_suspend(struct device *dev)
 {
 	regcache_cache_only(ahub->regmap_apbif, true);
 	regcache_cache_only(ahub->regmap_ahub, true);
@@ -61,7 +61,7 @@ static int tegra30_ahub_runtime_suspend(struct device *dev)
  * stopping streams should dynamically adjust the clock as required.  However,
  * this is not yet implemented.
  */
-static int tegra30_ahub_runtime_resume(struct device *dev)
+static __maybe_unused int tegra30_ahub_runtime_resume(struct device *dev)
 {
 	int ret;
 
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 8730ffa0f691..36344f0a64c1 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -36,7 +36,7 @@
 
 #define DRV_NAME "tegra30-i2s"
 
-static int tegra30_i2s_runtime_suspend(struct device *dev)
+static __maybe_unused int tegra30_i2s_runtime_suspend(struct device *dev)
 {
 	struct tegra30_i2s *i2s = dev_get_drvdata(dev);
 
@@ -47,7 +47,7 @@ static int tegra30_i2s_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra30_i2s_runtime_resume(struct device *dev)
+static __maybe_unused int tegra30_i2s_runtime_resume(struct device *dev)
 {
 	struct tegra30_i2s *i2s = dev_get_drvdata(dev);
 	int ret;
-- 
2.17.1