getnstimeofday() and suspend

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Hi,

I noticed an interesting feature in the getnstimeofday() function when
used with suspend. System clock is effectively reset to the value it was
just before suspend. You can see this behavior e.g. with this command
line:

	date && echo mem > /sys/power/state && date

With approx. 2 minutes in suspend state the output for me was this:

/ # date && echo mem > sys/power/state && date
Thu Jan  1 00:13:40 UTC 1970PM: Syncing filesystems ...
done.
Freezing user space processes ... (elapsed 0.00 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
Suspending console(s)
Successfully put all powerdomains to target state
Restarting tasks ... done.
Thu Jan  1 00:13:42 UTC 1970

I.e., the calendar clock was only advanced 2 seconds. The time you spend
in suspend does not matter, the end result is the same, it will reset
the time to the value it was before suspend.

Is this behavior intended?

-Tero
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