| Subject: sched: Check for idle task in might_sleep() |
| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Wed, 09 Jan 2013 23:34:08 +0100 |
| |
| Idle is not allowed to call sleeping functions ever! |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| --- |
| kernel/sched/core.c | 3 ++- |
| 1 file changed, 2 insertions(+), 1 deletion(-) |
| |
| --- a/kernel/sched/core.c |
| +++ b/kernel/sched/core.c |
| @@ -7395,7 +7395,8 @@ void __might_sleep(const char *file, int |
| static unsigned long prev_jiffy; /* ratelimiting */ |
| |
| rcu_sleep_check(); /* WARN_ON_ONCE() by default, no rate limit reqd. */ |
| - if ((preempt_count_equals(preempt_offset) && !irqs_disabled()) || |
| + if ((preempt_count_equals(preempt_offset) && !irqs_disabled() && |
| + !is_idle_task(current)) || |
| system_state != SYSTEM_RUNNING || oops_in_progress) |
| return; |
| if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy) |
