Offset idleprio tasks by a value which will not overflow when left shifted for
locality_diff.

-ck

---
 kernel/sched/bfs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-4.7-ck3/kernel/sched/bfs.c
===================================================================
--- linux-4.7-ck3.orig/kernel/sched/bfs.c
+++ linux-4.7-ck3/kernel/sched/bfs.c
@@ -605,8 +605,9 @@ static void enqueue_task(struct task_str
 		sl_id = p->prio;
 	else {
 		sl_id = p->deadline;
+		/* Set it to cope with 4 left shifts with locality_diff */
 		if (p->prio == IDLE_PRIO)
-			sl_id |= 0xF000000000000000;
+			sl_id |= 0x0F00000000000000;
 	}
 	/*
 	 * Some architectures don't have better than microsecond resolution