Merge tag 'gfs2-5.1.fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

 * @delta is the difference between the current rtt sample and the

 * running average srtt. We add 1/8 of that to the srtt in order to

 * update the current srtt estimate. The variance estimate is a bit

 * more complicated. We subtract the abs value of the @delta from

 * the current variance estimate and add 1/4 of that to the running

 * total.

 * more complicated. We subtract the current variance estimate from

 * the abs value of the @delta and add 1/4 of that to the running

 * total.  That's equivalent to 3/4 of the current variance

 * estimate plus 1/4 of the abs of @delta.

 *

 * Note that the index points at the array entry containing the smoothed

 * mean value, and the variance is always in the following entry

	s64 delta = sample - s->stats[index];

	s->stats[index] += (delta >> 3);

	index++;

	s->stats[index] += ((abs(delta) - s->stats[index]) >> 2);

	s->stats[index] += (s64)(abs(delta) - s->stats[index]) >> 2;

}

/**