From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Rostedt Subject: [PATCH RT 4/6] sched: Check for idle task in might_sleep() Date: Wed, 06 Feb 2013 17:02:14 -0500 Message-ID: <20130206220251.265116935@goodmis.org> References: <20130206220210.823160521@goodmis.org> Cc: Thomas Gleixner , Carsten Emde , John Kacur , To: linux-kernel@vger.kernel.org, linux-rt-users Return-path: Content-Disposition: inline; filename=0004-sched-Check-for-idle-task-in-might_sleep.patch Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org From: Thomas Gleixner Idle is not allowed to call sleeping functions ever! Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner Signed-off-by: Steven Rostedt --- 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