extern struct address_space_operations coda_file_aops;
extern struct address_space_operations coda_symlink_aops;
-extern struct file_operations coda_dir_operations;
-extern struct file_operations coda_file_operations;
-extern struct file_operations coda_ioctl_operations;
+extern const struct file_operations coda_dir_operations;
+extern const struct file_operations coda_file_operations;
+extern const struct file_operations coda_ioctl_operations;
/* operations shared over more than one file */
int coda_open(struct inode *i, struct file *f);