linux-kernel - Re: [10/14] wireless: cw1200: use __maybe_unused to hide pm functions

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Date:	Tue,  8 Mar 2016 10:33:29 +0000 (UTC)
From:	Kalle Valo <kvalo@...eaurora.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Solomon Peachy <pizza@...ftnet.org>,
	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [10/14] wireless: cw1200: use __maybe_unused to hide pm functions_


> The cw1200 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/net/wireless/st/cw1200/cw1200_spi.c:450:12: error: 'cw1200_spi_suspend' 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.
> 
> For the DEV_PM_OPS definition, we can use an IS_ENABLED() check
> to avoid defining the structure when CONFIG_PM is not set without
> the #ifdef.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Thanks, applied to wireless-drivers-next.git.

Kalle Valo