linux-kernel - Re: linux-next: build warnings after merge of the akpm-current tree

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Message-ID: <521F2F7E.8010702@parallels.com>
Date:	Thu, 29 Aug 2013 15:24:46 +0400
From:	Maxim Patlasov <mpatlasov@...allels.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-next@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build warnings after merge of the akpm-current tree

Hi Stephen,

08/29/2013 01:47 PM, Stephen Rothwell пишет:
> Hi Andrew,
>
> After merging the akpm tree, today's linux-next build (sparc64 defconfig
> and others) produced these warnings:
>
> mm/page-writeback.c: In function 'balance_dirty_pages_ratelimited':
> mm/page-writeback.c:1450:13: warning: 'bdi_thresh' may be used uninitialized in this function [-Wuninitialized]
> mm/page-writeback.c:1372:16: note: 'bdi_thresh' was declared here
> mm/page-writeback.c:1226:16: warning: 'bdi_dirty' may be used uninitialized in this function [-Wuninitialized]
> mm/page-writeback.c:1369:16: note: 'bdi_dirty' was declared here
>
> Possibly introduced by commit 34c547af1e23 ("mm/page-writeback.c: add
> strictlimit feature"), but I am not sure anything can be done about them.
>

This looks as gcc glitch. So far as I didn't observe the warnings, the 
version of gcc does matter. May be moving the definitions of the two 
variables into for(;;){...} would help. Could you please give it a try?

Thanks,
Maxim
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