[PATCH RESEND] ubifs: Introduce a mount option of force_atime.

[Artem Bityutskiy]

On Wed, 2015-06-10 at 11:16 +0800, Dongsheng Yang wrote:
> Therefore, I introduced a new option named as force_atime in ubifs.
> That's a ubifs-dependent opiton and it works as a main switch, in
> a higher level compared with atime and noatime. If force_atime, we
> support the atime-related flags. Otherwise, we don't care about all of
> them in flags and don't support atime anyway.

How bad is it to just default to relatime like other file-systems do,
comparing to what we have now?