From 38e78bb4adbb2b67e4bb19e5dee2ea61c39e2abc Mon Sep 17 00:00:00 2001 From: Srivatsa Vaddagiri Date: Wed, 16 Jul 2014 07:30:30 -0700 Subject: sched: Add BUG_ON when task_cpu() is incorrect It would be fatal if task_cpu() information for a task does not accurately represent the cpu on which its running. All sorts of wierd issues can arise if that were to happen! Add a BUG_ON() in context switch to detect such cases. Change-Id: I4eb2c96c850e2247e22f773bbb6eedb8ccafa49c Signed-off-by: Srivatsa Vaddagiri --- kernel/sched/core.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'kernel') diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 65d61686ea84..41db511efbfd 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4053,6 +4053,8 @@ static void __sched notrace __schedule(bool preempt) clear_preempt_need_resched(); rq->clock_skip_update = 0; + BUG_ON(task_cpu(next) != cpu_of(rq)); + if (likely(prev != next)) { rq->nr_switches++; rq->curr = next; -- cgit v1.2.3