EXT4_BLOCK_SIZE   131 fs/ext4/ext4.h #define	EXT4_ADDR_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / sizeof(__u32))
EXT4_BLOCK_SIZE   206 fs/ext4/ext4.h # define EXT4_DESC_PER_BLOCK(s)		(EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
EXT4_BLOCK_SIZE  3837 fs/ext4/inode.c 	inodes_per_block = (EXT4_BLOCK_SIZE(sb) / EXT4_INODE_SIZE(sb));