ocfs2_rw_lock
int ocfs2_rw_lock(struct inode *inode, int write);
status = ocfs2_rw_lock(inode, 1);
ret = ocfs2_rw_lock(inode, 1);
ret = ocfs2_rw_lock(inode, rw_level);
ret = ocfs2_rw_lock(inode, 0);
ret = ocfs2_rw_lock(inode, 1);
status = ocfs2_rw_lock(inode, 1);
error = ocfs2_rw_lock(inode, 1);
status = ocfs2_rw_lock(inode1, 1);
status = ocfs2_rw_lock(inode2, 1);