EXT4_BLOCK_SIZE_BITS
(EXT4_BLOCK_SIZE_BITS(sb) + EXT4_CLUSTER_BITS(sb) + 3);
map.m_lblk = ctx->pos >> EXT4_BLOCK_SIZE_BITS(sb);
>> EXT4_BLOCK_SIZE_BITS(sb);
>> EXT4_BLOCK_SIZE_BITS(inode->i_sb);
>> EXT4_BLOCK_SIZE_BITS(inode->i_sb);
>> EXT4_BLOCK_SIZE_BITS(inode->i_sb);
nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
lblock = offset >> EXT4_BLOCK_SIZE_BITS(sb);
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);