linux-kernel - Re: linux-next: build warning after merge of the tip tree

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Message-ID: <20160407084833.GA2288@gmail.com>
Date:	Thu, 7 Apr 2016 10:48:33 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: build warning after merge of the tip tree


* Stephen Rothwell <sfr@...b.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