EXT4_DESC_PER_BLOCK  201 fs/ext4/ext4.h # define EXT4_DESC_PER_BLOCK(s)		(EXT4_SB(s)->s_desc_per_block)
EXT4_DESC_PER_BLOCK  206 fs/ext4/ext4.h # define EXT4_DESC_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))