From: Ingo Molnar <mingo@elte.hu>

Warn if free_irq() is called in IRQ context - free_irq() can execute /proc
VFS work, which must not be done in IRQ context.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/irq/manage.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN kernel/irq/manage.c~warn-if-free_irq-is-called-from-irq-context kernel/irq/manage.c
--- 25/kernel/irq/manage.c~warn-if-free_irq-is-called-from-irq-context	Fri Jan 27 14:33:11 2006
+++ 25-akpm/kernel/irq/manage.c	Fri Jan 27 14:33:11 2006
@@ -258,6 +258,7 @@ void free_irq(unsigned int irq, void *de
 	struct irqaction **p;
 	unsigned long flags;
 
+	WARN_ON(in_interrupt());
 	if (irq >= NR_IRQS)
 		return;
 
_