From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: external bitmaps on block devices?
Date: Mon, 22 Aug 2011 23:51:55 -0400
Message-ID: <20110823035155.GA12299@infradead.org>
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Is there any specific reason to require the external bitmap to be on
a file?  Currently the code requires regular files to call bmap on them,
which is a fairly dangerous thing to start with.  But why don't we just
allow using block devices to store the bitmap directly?