From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Mon, 2 Mar 2009 15:13:32 +0000 (+0100)
Subject: genirq: assert that irq handlers are indeed running in hardirq context
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=044d408409cc4e1bc75c886e27ca85c270db104c;p=linux-2.6-omap-h63xx.git

genirq: assert that irq handlers are indeed running in hardirq context

Make sure the genirq layer handlers are indeed running handlers
in hardirq context. That is the genirq expectation and doing
anything else is broken.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1236006812.5330.632.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 3aba8d12f32..a2ee682bca2 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -328,6 +328,8 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
 	irqreturn_t ret, retval = IRQ_NONE;
 	unsigned int status = 0;
 
+	WARN_ONCE(!in_irq(), "BUG: IRQ handler called from non-hardirq context!");
+
 	if (!(action->flags & IRQF_DISABLED))
 		local_irq_enable_in_hardirq();