Messages in this thread Patch in this message |  | | Date | Wed, 06 Feb 2013 17:02:14 -0500 | From | Steven Rostedt <> | Subject | [PATCH RT 4/6] sched: Check for idle task in might_sleep() |
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From: Thomas Gleixner <tglx@linutronix.de>
Idle is not allowed to call sleeping functions ever!
Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- kernel/sched.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/sched.c b/kernel/sched.c index 20b228f..14219ed 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -8937,7 +8937,8 @@ 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) -- 1.7.10.4
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