sched: Check for idle task in might_sleep()
Idle is not allowed to call sleeping functions ever! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1391803122-4425-3-git-send-email-bigeasy@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -6927,7 +6927,8 @@ void __might_sleep(const char *file, int line, int preempt_offset)
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static unsigned long prev_jiffy; /* ratelimiting */
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rcu_sleep_check(); /* WARN_ON_ONCE() by default, no rate limit reqd. */
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if ((preempt_count_equals(preempt_offset) && !irqs_disabled()) ||
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if ((preempt_count_equals(preempt_offset) && !irqs_disabled() &&
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!is_idle_task(current)) ||
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system_state != SYSTEM_RUNNING || oops_in_progress)
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return;
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if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy)
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