Kernel threads are rare so make them unlikely.
Fix inverse logic fail on check_smt_siblings.

-ck
---
 kernel/sched/bfs.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-3.15.5-ck1/kernel/sched/bfs.c
===================================================================
--- linux-3.15.5-ck1.orig/kernel/sched/bfs.c	2014-08-12 11:26:36.480936005 +1000
+++ linux-3.15.5-ck1/kernel/sched/bfs.c	2014-08-15 22:36:14.873564235 +1000
@@ -836,7 +836,7 @@ static bool smt_should_schedule(struct t
 	int best_bias;
 
 	/* Kernel threads always run */
-	if (!p->mm)
+	if (unlikely(!p->mm))
 		return true;
 	if (rt_task(p))
 		return true;
@@ -3302,7 +3302,7 @@ static void check_smt_siblings(int cpu)
 		if (!rq->online)
 			continue;
 		p = rq->curr;
-		if (smt_should_schedule(p, cpu)) {
+		if (!smt_should_schedule(p, cpu)) {
 			set_tsk_need_resched(p);
 			__send_other_resched(p, other_cpu);
 		}