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Date: Thu, 7 Apr 2016 10:48:33 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>, linux-next@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: linux-next: build warning after merge of the tip tree
Message-ID: <20160407084833.GA2288@gmail.com>
References: <20160407152603.173426e5@canb.auug.org.au>
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* Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi all,
> 
> After merging the tip tree, today's linux-next build (powerpc ppc44x_defconfig)
> produced this warning:
> 
> mm/gup.c: In function 'get_user_pages_fast':
> mm/gup.c:1510:20: warning: unused variable 'mm' [-Wunused-variable]
>   struct mm_struct *mm = current->mm;
>                     ^
> 
> Introduced by commit
> 
>   dc8cfd957d85 ("mm/gup: Remove the macro overload API migration helpers from the get_user*() APIs")

Indeed - and this only triggers on HAVE_GENERIC_RCU_GUP.

I've amended the commit.

Thanks,

	Ingo