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Date: Wed, 17 Jun 2009 06:36:09 +0200
From: Jens Axboe <jens.axboe@oracle.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: Warning in block code
Message-ID: <20090617043609.GT11363@kernel.dk>
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On Wed, Jun 17 2009, Benjamin Herrenschmidt wrote:
> Hoy !
> 
> I see that:
> 
> block/blk-settings.c: In function ???blk_set_default_limits???:
> block/blk-settings.c:115: warning: large integer implicitly truncated to unsigned type
> 
> Comes from
> 
> 	lim->bounce_pfn = BLK_BOUNCE_ANY;
> 
> With BLK_BOUNCE_ANY being a
> 
> include/linux/blkdev.h:#define BLK_BOUNCE_ANY		(-1ULL)
> 
> And struct queue_limit.bounce_pfn is:
> 
> 	unsigned long		bounce_pfn;
> 
> (The warning is fishy as both quantities are unsigned, but there -is-
> truncation happening here).

Should be safe to just make it -1UL now.

-- 
Jens Axboe