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Commit db273be2 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
Browse files

sched: Check for idle task in might_sleep() 



Idle is not allowed to call sleeping functions ever!

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1391803122-4425-3-git-send-email-bigeasy@linutronix.de


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 77177856

kernel/sched/core.c

+2 −1
Original line number Diff line number Diff line
@@ -6927,7 +6927,8 @@ void __might_sleep(const char *file, int line, int preempt_offset) 
	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)