extern struct dentry *jfs_get_parent(struct dentry *dentry);
extern int jfs_sync_flags(struct inode *);
extern void jfs_set_inode_flags(struct inode *);
+extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
-extern struct address_space_operations jfs_aops;
+extern const struct address_space_operations jfs_aops;
extern struct inode_operations jfs_dir_inode_operations;
extern const struct file_operations jfs_dir_operations;
extern struct inode_operations jfs_file_inode_operations;