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

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Message-ID: <147131793557.13727.4080875938782302791.stgit@dwillia2-desk3.amr.corp.intel.com>
Date:	Mon, 15 Aug 2016 20:25:35 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	linux-nvdimm@...ts.01.org
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk
Subject: [PATCH 7/7] 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@...el.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);
 }