linux-kernel - [PATCH] ASoC: tegra: mark runtime-pm functions as __maybe

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Date:   Thu, 22 Apr 2021 15:34:00 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Qiushi Wu <wu000273@....edu>, alsa-devel@...a-project.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: tegra: mark runtime-pm functions as __maybe_unused

From: Arnd Bergmann <arnd@...db.de>

A reorganization of the driver source led to two of them causing
a compile time warning in some configurations:

tegra/tegra20_spdif.c:36:12: error: 'tegra20_spdif_runtime_resume' defined but not used [-Werror=unused-function]
   36 | static int tegra20_spdif_runtime_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
tegra/tegra20_spdif.c:27:12: error: 'tegra20_spdif_runtime_suspend' defined but not used [-Werror=unused-function]
   27 | static int tegra20_spdif_runtime_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tegra/tegra30_ahub.c:64:12: error: 'tegra30_ahub_runtime_resume' defined but not used [-Werror=unused-function]
   64 | static int tegra30_ahub_runtime_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
tegra/tegra30_ahub.c:43:12: error: 'tegra30_ahub_runtime_suspend' defined but not used [-Werror=unused-function]
   43 | static int tegra30_ahub_runtime_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Mark these functions as __maybe_unused to avoid this kind of warning.

Fixes: b5571449e618 ("ASoC: tegra30: ahub: Remove handing of disabled runtime PM")
Fixes: c53b396f0dd4 ("ASoC: tegra20: spdif: Remove handing of disabled runtime PM")
Fixes: 80ec4a4cb36d ("ASoC: tegra20: i2s: Remove handing of disabled runtime PM")
Fixes: b5f6f781fcb2 ("ASoC: tegra30: i2s: Remove handing of disabled runtime PM")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 sound/soc/tegra/tegra20_i2s.c   | 4 ++--
 sound/soc/tegra/tegra20_spdif.c | 4 ++--
 sound/soc/tegra/tegra30_ahub.c  | 4 ++--
 sound/soc/tegra/tegra30_i2s.c   | 4 ++--
 4 files changed, 8 insertions(+), 8 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/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c
index 7b597ee63cb5..de698ff2a69c 100644
--- a/sound/soc/tegra/tegra20_spdif.c
+++ b/sound/soc/tegra/tegra20_spdif.c
@@ -24,7 +24,7 @@
 
 #define DRV_NAME "tegra20-spdif"
 
-static int tegra20_spdif_runtime_suspend(struct device *dev)
+static __maybe_unused int tegra20_spdif_runtime_suspend(struct device *dev)
 {
 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);
 
@@ -33,7 +33,7 @@ static int tegra20_spdif_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra20_spdif_runtime_resume(struct device *dev)
+static __maybe_unused int tegra20_spdif_runtime_resume(struct device *dev)
 {
 	struct tegra20_spdif *spdif = 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;
-- 
2.29.2