[Yaffs] Optinins sought on change attribute times to 64 bits

[Luc Van Oostenryck]

Charles Manning wrote:

> 
> I have tried to only modify stuff by addition, ie by whittling at the 
> roomToGrow.
> 
> I think the above will be OK, but your comments would be appreciated.
> 
> <snip>
> 
> -- CHarles
> 

Since your proposition only use reserved space and the nand (RoomToGrow),
and the 0xFFFFFFFF pattern is in invalid number of nanoseconds;
we can have perfect compatibility, so I don't why we shoulnd't do it.

The only reason I can see against this is that will leave only 16 reserved bytes,
can it be that one day we would whish to use more than this for a more important thing?


We can save 12 bytes, if we leave the actual storage for yaffs1 compatibility and to store
the seconds for yaffs2 and use 12 bytes from RommToGrow to only store the nanoseconds for yaffs2.
Thus the area should become:
	__u32 yst_uid;   // user ID of owner
	__u32 yst_gid;    // group ID of owner
	__u32 yst_atime_sec;/ time of last access
	__u32 yst_mtime_sec;/ time of last modification
	__u32 yst_ctime_sec;/ time of last change


<snip>

	__u32 yst_ctime_nsec;	// don't use the value if it is 0xFFFFFFFF
	__u32 yst_atime_nsec;	//    -> compatibility with yaffs1
	__u32 yst_mtime_nsec;
	__u32 roomToGrow[7];



Luc