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-rw-r--r--lib/test_hmm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index e97ca8ec0bce..c710b4c5714d 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -472,6 +472,7 @@ static bool dmirror_allocate_chunk(struct dmirror_device *mdevice,
devmem->pagemap.type = MEMORY_DEVICE_PRIVATE;
devmem->pagemap.range.start = res->start;
devmem->pagemap.range.end = res->end;
+ devmem->pagemap.nr_range = 1;
devmem->pagemap.ops = &dmirror_devmem_ops;
devmem->pagemap.owner = mdevice;