dec_valid_block_count
dec_valid_block_count(sbi, inode, 1);
dec_valid_block_count(sbi, dn->inode,
dec_valid_block_count(sbi, dn->inode, nr_free);
dec_valid_block_count(sbi, inode, ei.len);
dec_valid_block_count(sbi, inode, 1);
dec_valid_block_count(sbi, F2FS_I(inode)->cow_inode, count);