haven't heard anything on this.. is this in the vicinity of being a 
right solution?

> Not sure if this is the right approach with this.. The below
> fixes a warning message generated by GCC
>    CC      kernel/irq/manage.o
> kernel/irq/manage.c: In function '__setup_irq':
> kernel/irq/manage.c:652:14: warning: variable 'old_name' set but not used
>
> Signed-off-by: Justin P. Mattock<justinmattock@gmail.com>
>
> ---
>   kernel/irq/manage.c |    3 +++
>   1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
> index e149748..99d2f39 100644
> --- a/kernel/irq/manage.c
> +++ b/kernel/irq/manage.c
> @@ -733,6 +733,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
>   		if (!((old->flags&  new->flags)&  IRQF_SHARED) ||
>   		    ((old->flags ^ new->flags)&  IRQF_TRIGGER_MASK)) {
>   			old_name = old->name;
> +			if(old_name) {
> +				printk(KERN_ERR "IRQ mismatch: %d %s\n", IRQF_SHARED, old_name);
> +			}	
>   			goto mismatch;
>   		}
>