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-rw-r--r--drivers/md/dm-bufio.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/dm-bufio.h b/drivers/md/dm-bufio.h
index c096779a7292..b6d8f53ec15b 100644
--- a/drivers/md/dm-bufio.h
+++ b/drivers/md/dm-bufio.h
@@ -32,6 +32,13 @@ dm_bufio_client_create(struct block_device *bdev, unsigned block_size,
void dm_bufio_client_destroy(struct dm_bufio_client *c);
/*
+ * Set the sector range.
+ * When this function is called, there must be no I/O in progress on the bufio
+ * client.
+ */
+void dm_bufio_set_sector_offset(struct dm_bufio_client *c, sector_t start);
+
+/*
* WARNING: to avoid deadlocks, these conditions are observed:
*
* - At most one thread can hold at most "reserved_buffers" simultaneously.