用于存储linux结构superblock块大小的类型`

struct super_block {
    struct list_head    s_list;        /* Keep this first */
    dev_t            s_dev;        /* search index; _not_ kdev_t */
    unsigned char        s_blocksize_bits;
    unsigned long        s_blocksize;
    ...

从我读到的, s_blocksize 和 s_blocksize_bits 分别以字节和比特为单位包含块的大小。 比特数大于字节数,所以如果它们的类型相反,不是更有意义吗?这样地:

    unsigned char        s_blocksize_bits;
    unsigned long        s_blocksize;