device-dax: Drop register_filesystem()

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

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index bbd57ca0634a1314e79a4d762e1e1e68b99ff3d2..35f051efaf35d17c4656239c4e39688720a0dc06 100644 (file)
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -630,10 +630,6 @@ 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);
@@ -644,8 +640,6 @@ 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;
@@ -654,7 +648,6 @@ 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);
 }