int obdfs_readpage(struct dentry *dentry, struct page *page);
int obdfs_writepage(struct dentry *dentry, struct page *page);
struct page *obdfs_getpage(struct inode *inode, unsigned long offset, int create, int locked);
int obdfs_readpage(struct dentry *dentry, struct page *page);
int obdfs_writepage(struct dentry *dentry, struct page *page);
struct page *obdfs_getpage(struct inode *inode, unsigned long offset, int create, int locked);