[PATCH 7/7] dax: unmap/truncate on device shutdown

[Dan Williams]

Invalidate all mappings of a device-dax instance when the device is
unregistered.

Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
 drivers/dax/dax.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
index e8b9319aeadb..0a7899d5c65c 100644
--- a/drivers/dax/dax.c
+++ b/drivers/dax/dax.c
@@ -550,6 +550,7 @@ static void unregister_dax_dev(void *dev)
         */
        dax_dev->alive = false;
        synchronize_rcu();
+       unmap_mapping_range(dax_dev->inode->i_mapping, 0, 0, 1);
        cdev_del(cdev);
        device_unregister(dev);
 }