Merge "sched: fix incorrect prev_runnable_sum accounting with long ISR run"

		/* The IRQ busy time spanned multiple windows. Process the

		 * busy time preceding the current window start first. */

		delta = window_start - mark_start;

		if (delta > window_size) {

		if (delta > window_size)

			delta = window_size;

			/* If there's 1 or more full windows of IRQ busy time

			 * then the entire prev_runnable_sum will be a window

			 * of IRQ time - there should be no contribution from

			 * anything else. */

			rq->prev_runnable_sum = 0;

		}

		delta = scale_exec_time(delta, rq);

		rq->prev_runnable_sum += delta;