From: Arnd Bergmann Date: Wed, 2 Mar 2016 15:58:59 +0000 (+0100) Subject: hwrng: exynos - use __maybe_unused to hide pm functions X-Git-Tag: v4.4.118~83 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d69b722e418dec6b2b60db23a2798233c685244;p=thirdparty%2Fkernel%2Fstable.git hwrng: exynos - use __maybe_unused to hide pm functions commit b93f342da1766ef1740e6277508329356c4ea48b 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 Reviewed-by: Krzysztof Kozlowski Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c index 7845a38b66041..7ba0ae060d613 100644 --- a/drivers/char/hw_random/exynos-rng.c +++ b/drivers/char/hw_random/exynos-rng.c @@ -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)