linux-kernel - Re: PWM backlight build warning

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Date:	Sat, 6 Apr 2013 21:02:51 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Tony Prisk <linux@...sktech.co.nz>
Cc:	thierry.reding@...onic-design.de, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, akpm@...ux-foundation.org
Subject: Re: PWM backlight build warning

On Sun, Apr 07, 2013 at 06:33:35AM +1200, Tony Prisk wrote:

> The problem occurs because when CONFIG_PM=y but CONFIG_PM_SLEEP=n:

> I guess this would be a problem on every driver that has been
> converted to SIMPLE_DEV_PM_OPS.
> I don't know enough about the PM code to offer a fix, or whethermy
> chosen config is just 'invalid'.

You just need to put the system suspend functions inside an ifdef
CONFIG_PM_SLEEP instead of CONFIG_PM.

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