[PATCH] device-dax: Drop register_filesystem()

[Dan Williams <dan.j.williams@xxxxxxxxx>]

The device-dax fs is only there to allocate a common inode for each
device-node that refers to the same device by major:minor. It is
otherwise not user mountable and need not be displayed in
/proc/filesystems.

Reported-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Acked-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
 drivers/dax/super.c |    7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index ccb22d8db3a2..3d6a9e61e358 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -615,10 +615,6 @@ static int dax_fs_init(void)
 	if (!dax_cache)
 		return -ENOMEM;
 
-	rc = register_filesystem(&dax_fs_type);
-	if (rc)
-		goto err_register_fs;
-
 	dax_mnt = kern_mount(&dax_fs_type);
 	if (IS_ERR(dax_mnt)) {
 		rc = PTR_ERR(dax_mnt);
@@ -629,8 +625,6 @@ static int dax_fs_init(void)
 	return 0;
 
  err_mount:
-	unregister_filesystem(&dax_fs_type);
- err_register_fs:
 	kmem_cache_destroy(dax_cache);
 
 	return rc;
@@ -639,7 +633,6 @@ static int dax_fs_init(void)
 static void dax_fs_exit(void)
 {
 	kern_unmount(dax_mnt);
-	unregister_filesystem(&dax_fs_type);
 	kmem_cache_destroy(dax_cache);
 }