int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
unsigned int nr, struct buffer_head *bhs[]);
int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
struct buffer_head *bh);
int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
unsigned int nr, struct buffer_head *bhs[]);
int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
struct buffer_head *bh);