[PATCH] ASoC: fsl_easrc: mark PM functions __maybe_unused

[PATCH] ASoC: fsl_easrc: mark PM functions __maybe_unused

[Arnd Bergmann]

ifdefs are hard, and in this driver the suspend/resume functions are
the only callers of some other helpers that trigger a harmless warning
when CONFIG_PM is disabled:

sound/soc/fsl/fsl_easrc.c:1807:12: warning: 'fsl_easrc_get_firmware' defined but not used [-Wunused-function]
 1807 | static int fsl_easrc_get_firmware(struct fsl_asrc *easrc)
      |            ^~~~~~~~~~~~~~~~~~~~~~
sound/soc/fsl/fsl_easrc.c:303:12: warning: 'fsl_easrc_resampler_config' defined but not used [-Wunused-function]
  303 | static int fsl_easrc_resampler_config(struct fsl_asrc *easrc)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~

Remove the #ifdef and just mark the callers as __maybe_unused to
suppress the warnings altogether.

Fixes: 955ac624058f ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 sound/soc/fsl/fsl_easrc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c
index 20326bffab64..c6b5eb2d2af7 100644
--- a/sound/soc/fsl/fsl_easrc.c
+++ b/sound/soc/fsl/fsl_easrc.c
@@ -1997,8 +1997,7 @@ static int fsl_easrc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int fsl_easrc_runtime_suspend(struct device *dev)
+static __maybe_unused int fsl_easrc_runtime_suspend(struct device *dev)
 {
 	struct fsl_asrc *easrc = dev_get_drvdata(dev);
 	struct fsl_easrc_priv *easrc_priv = easrc->private;
@@ -2015,7 +2014,7 @@ static int fsl_easrc_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int fsl_easrc_runtime_resume(struct device *dev)
+static __maybe_unused int fsl_easrc_runtime_resume(struct device *dev)
 {
 	struct fsl_asrc *easrc = dev_get_drvdata(dev);
 	struct fsl_easrc_priv *easrc_priv = easrc->private;
@@ -2094,7 +2093,6 @@ static int fsl_easrc_runtime_resume(struct device *dev)
 	clk_disable_unprepare(easrc->mem_clk);
 	return ret;
 }
-#endif /* CONFIG_PM */
 
 static const struct dev_pm_ops fsl_easrc_pm_ops = {
 	SET_RUNTIME_PM_OPS(fsl_easrc_runtime_suspend,
-- 
2.26.0

Re: [PATCH] ASoC: fsl_easrc: mark PM functions __maybe_unused

[Nicolin Chen]

On Tue, Apr 28, 2020 at 11:28:08PM +0200, Arnd Bergmann wrote:
> ifdefs are hard, and in this driver the suspend/resume functions are
> the only callers of some other helpers that trigger a harmless warning
> when CONFIG_PM is disabled:
> 
> sound/soc/fsl/fsl_easrc.c:1807:12: warning: 'fsl_easrc_get_firmware' defined but not used [-Wunused-function]
>  1807 | static int fsl_easrc_get_firmware(struct fsl_asrc *easrc)
>       |            ^~~~~~~~~~~~~~~~~~~~~~
> sound/soc/fsl/fsl_easrc.c:303:12: warning: 'fsl_easrc_resampler_config' defined but not used [-Wunused-function]
>   303 | static int fsl_easrc_resampler_config(struct fsl_asrc *easrc)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Remove the #ifdef and just mark the callers as __maybe_unused to
> suppress the warnings altogether.
> 
> Fixes: 955ac624058f ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>

Re: [PATCH] ASoC: fsl_easrc: mark PM functions __maybe_unused

[Mark Brown]

On Tue, 28 Apr 2020 23:28:08 +0200, Arnd Bergmann wrote:
> ifdefs are hard, and in this driver the suspend/resume functions are
> the only callers of some other helpers that trigger a harmless warning
> when CONFIG_PM is disabled:
> 
> sound/soc/fsl/fsl_easrc.c:1807:12: warning: 'fsl_easrc_get_firmware' defined but not used [-Wunused-function]
>  1807 | static int fsl_easrc_get_firmware(struct fsl_asrc *easrc)
>       |            ^~~~~~~~~~~~~~~~~~~~~~
> sound/soc/fsl/fsl_easrc.c:303:12: warning: 'fsl_easrc_resampler_config' defined but not used [-Wunused-function]
>   303 | static int fsl_easrc_resampler_config(struct fsl_asrc *easrc)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.8

Thanks!

[1/1] ASoC: fsl_easrc: mark PM functions __maybe_unused
      commit: 087e3900a060cfc8516e02ea83fe6122da490d23

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark