Re: [RFC 0/13] extents and 48bit ext3

On disk extents format:
> /*
>   * this is extent on-disk structure
>   * it's used at the bottom of the tree
>   */
> struct ext3_extent {
>         __le32  ee_block;       /* first logical block extent covers */
>         __le16  ee_len;         /* number of blocks covered by extent */
>         __le16  ee_start_hi;    /* high 16 bits of physical block */
>         __le32  ee_start;       /* low 32 bigs of physical block */
> };

If it's not already carved in stone, could I suggest

struct ext3_extent {
        __le32  ee_block;       /* first logical block extent covers */
        __le32  ee_start;       /* low 32 bigs of physical block */
        __le16  ee_start_hi;    /* high 16 bits of physical block */
        __le16  ee_len;         /* number of blocks covered by extent */
};

So that the 48_bit ee-start field is in consistent little-endian order
and can be accessed as a 64-bit field by popular 64-bit processors that
aren't too fussy about alignment?