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The print_timestamp can never be bigger than the touch_timestamp, at
maximum it can be equal.  And if it is, the second check for
touch_timestamp + 1 bigger print_timestamp is always true, too.

The check for equality is sufficient as we proceed in one-second-steps
and are at least one second away from the last print-out if we have
another timestamp.
Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>