[PATCH, once again] regulator: core: avoid unused variable warning

[Mark Brown]

On Fri, Nov 20, 2015 at 01:12:00PM +0100, Arnd Bergmann wrote:
> On Friday 20 November 2015 11:41:27 Mark Brown wrote:

> > Can we please at least have a comment explaining that this is working
> > around lockdep limitations?

> Not sure which limitation you are referring to. Maybe you could just
> modify the changelog text as you like when applying the patch?

> I tried to capture the fact that mutex_lock_nested() intentionally
> doesn't evaluate its second argument when CONFIG_DEBUG_LOCK_ALLOC
> is not set, but that appears to be less of a limitation than a
> choice of the interface.

That's the limitation (or intereface choice or whatever) that I'm
talking about - the code looks like a function call so not evaulating
the second argument is surprising.  I'm looking for something in the
code rather than the changelog so it doesn't get cleaned up later.
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