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Subject: Warning in block code
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Jens Axboe <jens.axboe@oracle.com>
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Date: Wed, 17 Jun 2009 11:39:43 +1000
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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).

Cheers,
Ben.