EXT4_BLOCK_SIZE_BITS  262 fs/ext4/ext4.h # define EXT4_BLOCK_SIZE_BITS(s)	((s)->s_blocksize_bits)
EXT4_BLOCK_SIZE_BITS  265 fs/ext4/ext4.h # define EXT4_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)