linux-kernel - Re: [PATCH] mfd: exynos-lpass: mark PM functions as __maybe

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Date:   Tue, 06 Sep 2016 15:50:57 +0200
From:   Sylwester Nawrocki <s.nawrocki@...sung.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Lee Jones <lee.jones@...aro.org>, Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Beomho Seo <beomho.seo@...sung.com>,
        Inha Song <ideal.song@...sung.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: exynos-lpass: mark PM functions as __maybe_unused

On 09/06/2016 03:24 PM, Arnd Bergmann wrote:
> The newly added exynos lpass driver produces a build warning when
> CONFIG_PM is disabled since the only callers of exynos_lpass_disable
> are under an #ifdef:
> 
> drivers/mfd/exynos-lpass.c:93:13: error: 'exynos_lpass_disable' defined but not used [-Werror=unused-function]
>  static void exynos_lpass_disable(struct exynos_lpass *lpass)
> 
> This removes the #ifdef and replaces it with __maybe_unused annotations
> so the compiler can leave out the unused code silently with less
> room for mistakes.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 36c26760bba8 ("mfd: Add Samsung Exynos Low Power Audio Subsystem driver")

Thanks for fixing this,

Reviewed-by: Sylwester Nawrocki <s.nawrocki@...sung.com>