Allow anything to run on siblings where a kernel thread is being scheduled.

-ck

---
 kernel/sched/bfs.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-3.15.5-ck1/kernel/sched/bfs.c
===================================================================
--- linux-3.15.5-ck1.orig/kernel/sched/bfs.c	2014-08-10 22:11:15.172751246 +1000
+++ linux-3.15.5-ck1/kernel/sched/bfs.c	2014-08-11 10:22:35.394423127 +1000
@@ -3035,7 +3035,9 @@ static void time_slice_expired(struct ta
 	p->time_slice = timeslice();
 	p->deadline = grq.niffies + task_deadline_diff(p);
 #ifdef CONFIG_SMT_NICE
-	if (rt_task(p))
+	if (!p->mm)
+		p->smt_bias = 0;
+	else if (rt_task(p))
 		p->smt_bias = 1 << 30;
 	else if (task_running_iso(p))
 		p->smt_bias = 1 << 29;