linux-kernel - Re: [PATCH] regulator: core: avoid unused variable warning

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Date:	Tue, 13 Oct 2015 21:28:13 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Mark Brown <broonie@...nel.org>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	Liam Girdwood <lgirdwood@...il.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] regulator: core: avoid unused variable warning

On Monday 12 October 2015 16:42:31 Mark Brown wrote:
> On Fri, Oct 09, 2015 at 02:36:47PM +0200, Arnd Bergmann wrote:
> 
> > The second argument of the mutex_lock_nested() helper is only
> > evaluated if CONFIG_DEBUG_LOCK_ALLOC is set. Otherwise we
> > get this build warning for the new regulator_lock_supply
> > function:
> 
> Shouldn't we have an annotation or something for this in
> mutex_lock_nested()?  It seems like something that might come up
> elsewhere and it's a bit of a surprise to have one of the arguments
> there not be evaluated.
> 

I've found a better solution by making mutex_lock_nested an
inline function. Will send a new patch.

	Arnd
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