extern const struct inode_operations ecryptfs_symlink_iops;
extern const struct super_operations ecryptfs_sops;
extern const struct dentry_operations ecryptfs_dops;
-extern struct address_space_operations ecryptfs_aops;
+extern const struct address_space_operations ecryptfs_aops;
extern int ecryptfs_verbosity;
extern unsigned int ecryptfs_message_buf_len;
extern signed long ecryptfs_message_wait_timeout;