static struct file_system_type ext4_fs_type = { 

.owner 
  = THIS_MODULE, 

.name 
 = "ext4", 

.mount 
  = ext4_mount, 

.kill_sb 
  = kill_block_super, 

.fs_flags 
  = FS_REQUIRES_DEV, 

 }; 

 MODULE_ALIAS_FS("ext4");