linux-kernel - Re: [PATCH 07/14] hw_random: exynos: use __maybe

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Message-ID: <20160311133104.GB24332@gondor.apana.org.au>
Date:	Fri, 11 Mar 2016 21:31:04 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Matt Mackall <mpm@...enic.com>, Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Daniel Thompson <daniel.thompson@...aro.org>,
	linux-crypto@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/14] hw_random: exynos: use __maybe_unused to hide pm
 functions

On Wed, Mar 02, 2016 at 04:58:59PM +0100, Arnd Bergmann wrote:
> 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@...db.de>

Applied.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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