From: Dan Williams <dan.j.williams@intel.com>
Date: Thu, 4 Aug 2016 23:53:50 +0000 (-0700)
Subject: dax: unmap/truncate on device shutdown
X-Git-Tag: v4.9-rc1~45^2^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9dc1e4927bfabaf654738c9ecca3a4926a0aaeb5;p=platform%2Fkernel%2Flinux-amlogic.git

dax: unmap/truncate on device shutdown

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

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

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);
 }