From a5d895a90bf57e5fe87edf48dd1852e7292d570d Mon Sep 17 00:00:00 2001
From: Joe Thornber <ejt@redhat.com>
Date: Thu, 16 Apr 2015 12:47:21 +0100
Subject: [PATCH] dm thin metadata: add dm_thin_find_mapped_range()

Retrieve the next run of contiguously mapped blocks.  Useful for working
out where to break up IO.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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