ext4_chunk_trans_extent
extern int ext4_chunk_trans_extent(struct inode *inode, int nrblocks);
restart_credits = ext4_chunk_trans_extent(inode, 0);
credits = ext4_chunk_trans_extent(inode, 0);
credits = ext4_chunk_trans_extent(inode, 0);
needed_blocks = ext4_chunk_trans_extent(inode, 1);
needed_blocks = ext4_chunk_trans_extent(inode, 1);
needed_blocks = ext4_chunk_trans_extent(inode, 1);
needed_blocks = ext4_chunk_trans_extent(inode,
credits = ext4_chunk_trans_extent(inode, 2);
credits = ext4_chunk_trans_extent(inode, 1);
credits = ext4_chunk_trans_extent(inode,
credits = ext4_chunk_trans_extent(orig_inode, 0) * 2;
credits += ext4_chunk_trans_extent(inode, 1) + 1;