commit 3bc52c45bac26bf7ed1dc8d287ad1aeaed1250b6
author Dan Williams <dan.j.williams@intel.com> Sun Jul 24 21:55:45 2016 -0700
committer Dan Williams <dan.j.williams@intel.com> Tue Aug 23 22:58:51 2016 -0700
tree 3ac261a353583b2490ce2b65a4da4941085308ea
parent ba09c01d2fa866f22e42ac2af405fe386f491879

dax: define a unified inode/address_space for device-dax mappings

In support of enabling resize / truncate of device-dax instances, define
a pseudo-fs to provide a unified inode/address space for vm operations.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

include/uapi/linux/magic.h

diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index e398bea..9bd5594 100644
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -65,6 +65,7 @@
 #define V9FS_MAGIC		0x01021997
 
 #define BDEVFS_MAGIC            0x62646576
+#define DAXFS_MAGIC             0x64646178
 #define BINFMTFS_MAGIC          0x42494e4d
 #define DEVPTS_SUPER_MAGIC	0x1cd1
 #define FUTEXFS_SUPER_MAGIC	0xBAD1DEA