* Inodes and files operations
*/
extern struct file_operations nilfs_dir_operations;
-extern struct inode_operations nilfs_file_inode_operations;
+extern const struct inode_operations nilfs_file_inode_operations;
extern struct file_operations nilfs_file_operations;
extern const struct address_space_operations nilfs_aops;
-extern struct inode_operations nilfs_dir_inode_operations;
-extern struct inode_operations nilfs_special_inode_operations;
-extern struct inode_operations nilfs_symlink_inode_operations;
+extern const struct inode_operations nilfs_dir_inode_operations;
+extern const struct inode_operations nilfs_special_inode_operations;
+extern const struct inode_operations nilfs_symlink_inode_operations;
/*
* filesystem type