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hwrng: exynos - use __maybe_unused to hide pm functions

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commit b93f342da1 upstream.

The exynos random driver uses #ifdef to check for CONFIG_PM, but
then uses SIMPLE_DEV_PM_OPS, which leaves the references out when
CONFIG_PM_SLEEP is not defined, so we get a warning with
PM=y && PM_SLEEP=n:

drivers/char/hw_random/exynos-rng.c:166:12: error: 'exynos_rng_suspend' defined but not used [-Werror=unused-function]
drivers/char/hw_random/exynos-rng.c:171:12: error: 'exynos_rng_resume' defined but not used [-Werror=unused-function]

This removes the incorrect #ifdef and instead uses a __maybe_unused
annotation to let the compiler know it can silently drop
the function definition.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann
2016-03-02 16:58:59 +01:00
committed by Greg Kroah-Hartman
parent ac21d006fc
commit 2d69b722e4
1 changed files with 4 additions and 6 deletions
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10
drivers/char/hw_random/exynos-rng.c
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@@ -155,8 +155,7 @@ static int exynos_rng_probe(struct platform_device *pdev)
return ret;
}
#ifdef CONFIG_PM
static int exynos_rng_runtime_suspend(struct device *dev)
static int __maybe_unused exynos_rng_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct exynos_rng *exynos_rng = platform_get_drvdata(pdev);
@@ -166,7 +165,7 @@ static int exynos_rng_runtime_suspend(struct device *dev)
return 0;
}
static int exynos_rng_runtime_resume(struct device *dev)
static int __maybe_unused exynos_rng_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct exynos_rng *exynos_rng = platform_get_drvdata(pdev);
@@ -174,12 +173,12 @@ static int exynos_rng_runtime_resume(struct device *dev)
return clk_prepare_enable(exynos_rng->clk);
}
static int exynos_rng_suspend(struct device *dev)
static int __maybe_unused exynos_rng_suspend(struct device *dev)
{
return pm_runtime_force_suspend(dev);
}
static int exynos_rng_resume(struct device *dev)
static int __maybe_unused exynos_rng_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct exynos_rng *exynos_rng = platform_get_drvdata(pdev);
@@ -191,7 +190,6 @@ static int exynos_rng_resume(struct device *dev)
return exynos_rng_configure(exynos_rng);
}
#endif
static const struct dev_pm_ops exynos_rng_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(exynos_rng_suspend, exynos_rng_resume)