linux-kernel - Re: [PATCH] thermal: tegra: mark PM functions __maybe

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Date:	Tue, 19 Apr 2016 10:35:55 +0800
From:	Wei Ni <wni@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>,
	Arnd Bergmann <arnd@...db.de>
CC:	Eduardo Valentin <edubezval@...il.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Jon Hunter <jonathanh@...dia.com>, <linux-pm@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] thermal: tegra: mark PM functions __maybe_unused



On 2016年04月18日 15:15, Thierry Reding wrote:
> * PGP Signed by an unknown key
> 
> On Sat, Apr 16, 2016 at 10:19:33PM +0200, Arnd Bergmann wrote:
>> After the PM support has been added to this driver, we get
>> a harmless warning when that support is disabled at compile
>> time:
>>
>> drivers/thermal/tegra/soctherm.c:641:12: error: 'soctherm_resume' defined but not used [-Werror=unused-function]
>>  static int soctherm_resume(struct device *dev)
>>
>> This marks the two PM functions as __maybe_unused to shut up
>> the warning. This is preferred over adding an #ifdef around
>> them, as it is harder to get wrong, and provides better
>> compile-time coverage.
>>
>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>> Fixes: a134b4143b65 ("thermal: tegra: add PM support")
>> ---
>>  drivers/thermal/tegra/soctherm.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> The need for this should go away when Jon's generic power domain series

Hi Thierry,
Could you please show me the Jon's generic power domain series, so that I can
verify it.

Thanks.

> gets merged (hopefully very soon now) and enabled on 32-bit ARM. In the
> meantime:
> 
> Acked-by: Thierry Reding <treding@...dia.com>
> 
> * Unknown Key
> * 0x7F3EB3A1
>