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Date: Tue, 9 Oct 2012 15:33:29 +0300
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Roberto Corrado <i@secure.corradoroberto.it>
Cc: linux-kernel@vger.kernel.org
Subject: Re: WARNING: at block/genhd.c:1570 disk_clear_events+0xbf/0xd0()
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Fixed in:
commit fdd514e16bb2531c0c61ae8a1f87740ce217f630
Author: Tejun Heo <tj@kernel.org>
Date:   Thu Jun 9 20:43:59 2011 +0200

    block: make disk_block_events() properly wait for work cancellation

regards,
dan carpenter