linux-kernel - [PATCH v2] sched: taint kernel with TAINT

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Date:	Thu, 10 May 2012 16:20:04 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2] sched: taint kernel with TAINT_WARN after sleep-in-atomic
 bug

Usually sleep-in-atomic bugs are followed by dozens other warnings.
This patch should help to figure out original source of problem.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
---
 kernel/sched/core.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 0533a68..b6458e4 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3113,6 +3113,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
 	if (irqs_disabled())
 		print_irqtrace_events(prev);
 	dump_stack();
+	add_taint(TAINT_WARN);
 }
 
 /*

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